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Flame Kurrajong

Flame Kurrajong

The Illawarra Flame Tree (Brachychiton acerifolius), is a large tree native to tropical regions on the east coast of Australia. It is famous for the bright red bell-shaped flowers that often cover the whole tree when it is leafless. Along with other members of the Brachychiton genus, it is commonly referred to as a Kurrajong. This tree is tolerant of temperate climates and is now cultivated world-over for its beauty. However, the maximum height of 40 m is reached only in the original, warmer, habitat. Similarly to its Kurrajong relatives the leaves are variable, with up to 7 deep lobes. It is deciduous - shedding its leaves after the dry season. The spectacular flowering occurs in late spring and new foliage is ready for the summer rains. In areas where the winter is not particularly dry, this natural rhythm may become somewhat erratic and the tree may flower only partially. Flowers are scarlet bells with 5 partially fused petals. The pod-like fruits (technically known as follicles) are dark brown, wide, boat-shaped and about 10 cm long. They contain masses of thin bristles that stick in the skin, as well as yellow seeds. These are nutritious and were eaten by Aboriginies after after toasting.

References


- Holliday, I. A field guide to Australian trees (3rd edition), Reed New Holland, 2002
- [http://science.uniserve.edu.au/school/curric/stage4_5/nativeplants/walk/ The University of Sydney: Our Indigenous garden]

Tree

, the tallest tree species on earth]] A tree can be defined as a large, perennial, woody plant. Though there is no set definition regarding minimum size, the term generally applies to plants at least 6 m (20 ft) high at maturity and, more importantly, having secondary branches supported on a single main stem or trunk (see shrub for comparison). Compared with most other plant forms, trees are long-lived. A few species of trees grow to 100 m tall, and some can live for several thousand years. Trees are important components of the natural landscape and significant elements in landscaping, and in agriculture supplying orchard crops (such as apples). Trees also play an important role in many of the world's mythologies (see Tree (mythology)).

Classifications

Tree (mythology)]] A tree is a plant form and trees occur in many different orders and families of plants. Trees thus show a wide variety of growth form, leaf type and shape, bark characteristics, reproductive structures, etc. The earliest trees were tree ferns and horsetails, which grew in vast forests in the Carboniferous Period; tree ferns still survive, but the only surviving horsetails are not of tree form. Later, in the Triassic Period, conifers, ginkgos, cycads and other gymnosperms appeared, and subsequently flowering plants in the Cretaceous Period. Most species of trees today are flowering plants and conifers. The listing below gives examples of many well-known trees and how they are typically classified. A small group of trees growing together is called a grove or copse, and a landscape covered by a dense growth of trees is called a forest. Several biotopes are defined largely by the trees that inhabit them; examples are rainforest and taiga (see ecozones). A landscape of trees scattered or spaced across grassland (usually grazed or burned over periodically) is called a savanna.

Morphology

The basic parts of a tree are the roots, trunk(s), branches, twigs and leaves. Tree stems consist mainly of support and transport tissues (xylem and phloem). Wood consists of xylem cells, and bark is made of phloem and other tissues external to the vascular cambium. Trees may be broadly grouped into exogenous and endogenous trees according to the way in which their stem diameter increases. Exogenous trees, which comprise the great majority of modern trees (all conifers, and all broadleaf trees), grow by the addition of new wood outwards, immediately under the bark. Endogenous trees, mainly in the monocotyledons (e.g. palms), grow by addition of new material inwards. As an exogenous tree grows, it creates growth rings. In temperate climates, these are commonly visible due to changes in the rate of growth with temperature variation over an annual cycle. These rings can be counted to determine the age of the tree, and used to date cores or even wood taken from trees in the past; this practice is known as the science of dendrochronology. In some tropical regions with constant year-round climate, growth is continuous and distinct rings are not formed, so age determination is impossible. Age determination is also impossible in endogenous trees. dendrochronology, Chile]] The roots of a tree are generally embedded in earth, providing anchorage for the above-ground biomass and absorbing water and nutrients from the soil. Above ground, the trunk gives height to the leaf-bearing branches, aiding in competition with other plant species for sunlight. In many trees, the arrangement of the branches optimizes exposure of the leaves to sunlight. Not all trees have all the plant organs or parts mentioned above. For example, most palm trees are not branched, the saguaro cactus of North America has no functional leaves, tree ferns do not produce bark, etc. Based on their general shape and size, all of these are nonetheless generally regarded as trees. Indeed, sometimes size is the more important consideration. A plant form that is similar to a tree, but generally having smaller, multiple trunks and/or branches that arise near the ground, is called a shrub. However, no sharp differentiation between shrubs and trees is possible. Given their small size, bonsai plants would not technically be 'trees', but one should not confuse reference to the form of a species with the size or shape of individual specimens. A spruce seedling does not fit the definition of a tree, but all spruces are trees. Bamboos by contrast, do show most of the characteristics of trees, yet are rarely called trees.

Champion trees

The world's champion trees can be considered on several factors; height, trunk diameter or girth, total size, and age. It is significant that in each case, the top position is always held by a conifer, though a different species in each case; in most measures, the second to fourth places are also held by conifers. ;Tallest trees The heights of the tallest trees in the world have been the subject of considerable dispute and much (often wild) exaggeration. Modern verified measurement with laser rangefinders combined with tape drop measurements made by tree climbers, carried out by the [http://www.uark.edu/misc/ents/home.htm U.S. Eastern Native Tree Society] has shown that most older measuring methods and measurements are unreliable, often producing exaggerations of 5% to 15% above the real height. Historical claims of trees of 114 m, 117 m, 130 m, and even 150 m, are now largely disregarded as unreliable, fantasy or outright fraud. The following are now accepted as the top five tallest reliably measured species: # Coast Redwood Sequoia sempervirens: 112.83 m, Humboldt Redwoods State Park, California ([http://www.conifers.org/cu/se/index.htm Gymnosperm Database]) # Coast Douglas-fir Pseudotsuga menziesii: 100.3 m, Brummit Creek, Coos County, Oregon ([http://www.conifers.org/pi/ps/menziesii2.htm Gymnosperm Database]) # Sitka Spruce Picea sitchensis: 96.7 m, Prairie Creek Redwoods State Park, California ([http://www.conifers.org/pi/pic/sitchensis.htm Gymnosperm Database]) # Giant Sequoia Sequoiadendron giganteum: 93.6 m, Redwood Mountain Grove, California ([http://www.conifers.org/cu/se2/index.htm Gymnosperm Database]) # Australian Mountain-ash Eucalyptus regnans: 92.0 m, Styx Valley, Tasmania ([http://www.forestrytas.com.au/forestrytas/tasfor/tasforests_12/tasfor_12_09.pdf Forestry Tasmania] [pdf file]) ;Stoutest trees The girth (circumference) of a tree is – or at least should be – much easier to measure than the height, as it is a simple matter of stretching a tape round the trunk, and pulling it taut to find the circumference. Despite this, U.K. tree author Alan Mitchell made the following comment about measurements of yew trees in the British Isles: :"The aberrations of past measurements of yews are beyond belief. For example, the tree at Tisbury has a well-defined, clean, if irregular bole at least 1.5 m long. It has been found to have a girth which has dilated and shrunk in the following way: 11.28 m (1834 Loudon), 9.3 m (1892 Lowe), 10.67 m (1903 Elwes and Henry), 9.0 m (1924 E. Swanton), 9.45 m (1959 Mitchell) .... Earlier measurements have therefore been omitted". As a general standard, tree girth is taken at 'breast height'; this is defined differently in different situations, with most foresters measuring girth at 1.3 m above ground, while ornamental tree measurers usually measure at 1.5 m above ground; in most cases this makes little difference to the measured girth. On sloping ground, the "above ground" reference point is usually taken as the highest point on the ground touching the trunk, but some use the average between the highest and lowest points of ground. Some of the inflated old measurements may have been taken at ground level. Some past exaggerated measurements also result from measuring the complete next-to-bark measurement, pushing the tape in and out over every crevice and buttress. Modern trends are to cite the tree's diameter rather than the circumference; this is obtained by dividing the measured circumference by π; it assumes the trunk is circular in cross-section (an oval or irregular cross-section would result in a mean diameter slightly greater than the assumed circle). This is cited as dbh (diameter at breast height) in tree literature. A further problem with measuring baobabs Adansonia is that these trees store large amounts of water in the very soft wood in their trunks. This leads to marked variation in their girth over the year, swelling to a maximum at the end of the rainy season, minimum at the end of the dry season. Although baobabs have some of the highest girth measurements of any trees, no accurate measurements are currently available, but probably do not exceed 10-11 m diameter. The stoutest species in diameter, excluding baobabs, are: # Montezuma Cypress Taxodium mucronatum: 11.42 m, Árbol del Tule, Santa Maria del Tule, Oaxaca, Mexico (A. F. Mitchell, International Dendrology Society Year Book 1983: 93, 1984). # Giant Sequoia Sequoiadendron giganteum: 8.85 m, General Grant tree, Grant Grove, California ([http://www.conifers.org/cu/se2/index.htm Gymnosperm Database]) # Coast Redwood Sequoia sempervirens: 7.44 m, Prairie Creek Redwoods State Park, California ([http://www.conifers.org/cu/se/index.htm Gymnosperm Database]) ;Largest trees The largest trees in total volume are those which are both tall and of large diameter, and in particular, which hold a large diameter high up the trunk. Measurement is very complex, particularly if branch volume is to be included as well as the trunk volume, so measurements have only been made for a small number of trees, and generally only for the trunk. No attempt has ever been made to include root volume. The top four species measured so far are ([http://www.conifers.org/topics/biggest.htm Gymnosperm Database]): # Giant Sequoia Sequoiadendron giganteum: 1489 m³, General Sherman tree # Coast Redwood Sequoia sempervirens: 1045 m³, Del Norte Titan tree # Western Redcedar Thuja plicata: 500 m³, Quinault Lake Redcedar # Kauri Agathis australis: 400 m³, Tane Mahuta tree (total volume, including branches, 516.7 m³)
However, the Alerce Fitzroya cupressoides, as yet un-measured, may well slot in at third or fourth place, and Montezuma Cypress Taxodium mucronatum is also likely to be high in the list. The largest angiosperm tree is a Australian Mountain-ash, the 'El Grande' tree of about 380 m³ in Tasmania. ;Oldest trees The oldest trees are determined by growth ring counts in cores taken from the edge to the centre of the tree or from entire cross-sections. Accurate determination is only possible for trees which produce growth rings, generally those which occur in seasonal climates; trees in uniform non-seasonal tropical climates grow continuously and do not have distinct growth rings. It is also only possible for trees which are solid to the centre of the tree; many very old trees become hollow as the dead heartwood decays away. For some of these species, age estimates have been made on the basis of extrapolating current growth rates, but the results are usually little better than guesswork or wild speculation. The verified oldest measured ages are ([http://www.conifers.org/topics/oldest.htm Gymnosperm Database]): # Great Basin Bristlecone Pine Pinus longaeva: 4844 years # Alerce Fitzroya cupressoides: 3622 years # Giant Sequoia Sequoia sempervirens: 3266 years # Huon-pine Lagarostrobos franklinii: 2500 years # Rocky Mountains Bristlecone Pine Pinus aristata: 2435 years Other species suspected of reaching exceptional age include European Yew Taxus baccata (probably over 3000 years) and Western Redcedar Thuja plicata. The oldest verified age for an angiosperm tree is 2293 years for the Sri Maha Bodhi Sacred Fig (Ficus religiosa) planted in 288 BC at Anuradhapura, Sri Lanka; this is also the oldest human-planted tree with a known planting date.

Major tree genera

Flowering plants (Magnoliophyta; angiosperms)

Dicotyledons (Magnoliopsida; broadleaf or hardwood trees)


- Anacardiaceae (Cashew family)
  - Cashew, Anacardium occidentale
  - Mango, Mangifera indica
  - Pistachio, Pistacia vera
  - Sumac, Rhus species
  - Lacquer tree, Toxicodendron verniciflua
- Annonaceae (Custard apple family)
  - Cherimoya Annona cherimola
  - Custard apple Annona reticulata
  - Pawpaw Asimina triloba
  - Soursop Annona muricata
- Apocynaceae (Dogbane family)
  - Pachypodium Pachypodium species
- Aquifoliaceae (Holly family)
  - Holly, Ilex species
- Araliaceae (Ivy family)
  - Kalopanax, Kalopanax pictus Kalopanax tree (background) in fall]]
- Betulaceae (Birch family)
  - Alder, Alnus species
  - Birch, Betula species
  - Hornbeam, Carpinus species
  - Hazel, Corylus species
- Bignoniaceae (family)
  - Catalpa, Catalpa species
- Cactaceae (Cactus family)
  - Saguaro, Carnegiea gigantea
- Cannabaceae (Cannabis family)
  - Hackberry, Celtis species
- Cornaceae (Dogwood family)
  - Dogwood, Cornus species
- Dipterocarpaceae family
  - Garjan Dipterocarpus species
  - Sal Shorea species
- Ericaceae (Heath family)
  - Arbutus, Arbutus species
- Eucommiaceae (Eucommia family)
  - Eucommia Eucommia ulmoides
- Fabaceae (Pea family)
  - Acacia, Acacia species
  - Honey locust, Gleditsia triacanthos
  - Black locust, Robinia pseudoacacia
  - Laburnum, Laburnum species
  - Pau Brasil, Brazilwood, Caesalpinia echinata
- Fagaceae (Beech family )
  - Chestnut, Castanea species
  - Beech, Fagus species
  - Southern beech, Nothofagus species
  - Tanoak, Lithocarpus densiflorus
  - Oak, Quercus species
- Fouquieriaceae (Boojum family)
  - Boojum, Fouquieria columnaris
- Hamamelidaceae (Witch-hazel family)
  - Sweetgum, Liquidambar species
  - Persian Ironwood, Parrotia persica
- Juglandaceae (Walnut family)
  - Walnut, Juglans species
  - Hickory, Carya species
  - Wingnut, Pterocarya species
- Lauraceae (Laurel family)
  - Cinnamon Cinnamomum zeylanicum
  - Bay Laurel Laurus nobilis
  - Avocado Persea americana
- Lecythidaceae (Paradise nut family)
  - Brazil Nut Bertholletia excelsa
- Lythraceae Loosestrife family
  - Crape-myrtle Lagerstroemia species
- Magnoliaceae (Magnolia family)
  - Tulip tree, Liriodendron species
  - Magnolia, Magnolia species
- Malvaceae (Mallow family; including Tiliaceae and Bombacaceae) Bombacaceae
  - Baobab, Adansonia species
  - Silk-cotton tree, Bombax species
  - Bottletrees, Brachychiton species
  - Kapok, Ceiba pentandra
  - Durian, Durio zibethinus
  - Balsa, Ochroma lagopus
  - Cacao (cocoa), Theobroma cacao
  - Linden (Basswood, Lime), Tilia species
- Meliaceae (Mahogany family)
  - Neem, Azadirachta indica
  - Bead tree, Melia azedarach
  - Mahogany, Swietenia mahagoni
- Moraceae (Mulberry family)
  - Fig, Ficus species
  - Mulberry, Morus species
- Myristicaceae (Nutmeg family)
  - Nutmeg, Mysristica fragrans
- Myrtaceae (Myrtle family)
  - Eucalyptus, Eucalyptus species
  - Myrtle, Myrtus species
  - Guava, Psidium guajavaGuava in flower]]
- Nyssaceae (Tupelo family; sometimes included in Cornaceae)
  - Tupelo, Nyssa species
  - Dove tree, Davidia involucrata
- Oleaceae (Olive family)
  - Olive, Olea europaea
  - Ash, Fraxinus species
- Paulowniaceae (Paulownia family)
  - Foxglove Tree, Paulownia species
- Platanaceae (Plane family)
  - Plane, Platanus species
- Rhizophoraceae (Mangrove family)
  - Red Mangrove, Rhizophora mangle
- Rosaceae (Rose family)
  - Rowans, Whitebeams, Service Trees Sorbus species
  - Hawthorn, Crataegus species
  - Pear, Pyrus species
  - Apple, Malus species
  - Almond, Prunus dulcis
  - Peach, Prunus persica
  - Plum, Prunus domestica
  - Cherry, Prunus species
- Rubiaceae (Bedstraw family)
  - Coffee, Coffea species
- Rutaceae (Rue family)
  - Citrus, Citrus species
  - Cork-tree, Phellodendron species
  - Euodia, Tetradium species
- Salicaceae (Willow family)
  - Aspen, Populus species
  - Poplar, Populus species
  - Willow, Salix species Willow
- Sapindaceae (including Aceraceae, Hippocastanaceae) (Soapberry family)
  - Maple, Acer species
  - Buckeye, Horse-chestnut, Aesculus species
  - Mexican Buckeye, Ungnadia speciosa
  - Lychee, Litchi sinensis
  - Golden rain tree, Koelreuteria paniculata
- Sapotaceae (Sapodilla family)
  - Gutta-percha, Palaquium species
  - Tambalacoque, or "dodo tree", Sideroxylon grandiflorum, previously Calvaria major
- Simaroubaceae family
  - Tree of heaven, Ailanthus species
- Theaceae (Camellia family)
  - Gordonia, Gordonia species
  - Stuartia, Stuartia species
- Thymelaeaceae (Thymelaea family)
  - Ramin, Gonystylus species
- Ulmaceae (Elm family)
  - Elm, Ulmus species
  - Zelkova, Zelkova species
- Verbenaceae family
  - Teak, Tectona species

Monocotyledons (Liliopsida)

Monocotyledon
- Agavaceae (Agave family)
  - Cabbage tree, Cordyline australis
  - Dragon tree, Dracaena draco
  - Joshua tree, Yucca brevifolia
- Arecaceae (Palmae) (Palm family)
  - Areca Nut, Areca catechu
  - Coconut Cocos nucifera
  - Date Palm, Phoenix dactylifera
  - Chusan Palm, Trachycarpus fortunei
- Poaceae (grass family)
  - Bamboos Poaceae subfamily Bambusoideae
- Note that banana 'trees' are not actually trees; they are not woody nor is the stalk perennial.

Conifers (Pinophyta; softwood trees)


- Araucariaceae (Araucaria family)
  - Araucaria, Araucaria species
  - Kauri, Agathis species
- Cupressaceae (Cypress family)
  - Cypress, Cupressus species
  - Cypress, Chamaecyparis species
  - Juniper, Juniperus species
  - Alerce or Patagonian cypress, Fitzroya cupressoides
  - Sugi, Cryptomeria japonica
  - Coast Redwood, Sequoia sempervirens
  - Giant Sequoia, Sequoiadendron giganteum
  - Dawn Redwood, Metasequoia glyptostroboides
  - Bald Cypress, Taxodium distichum
- Pinaceae (Pine family)
  - White pine, Pinus species
  - Pinyon pine, Pinus species
  - Pine, Pinus species
  - Spruce, Picea species
  - Larch, Larix species
  - Douglas-fir, Pseudotsuga species
  - Fir, Abies species
  - Cedar, Cedrus species
- Podocarpaceae (Yellowwood family)
  - African Yellowwood, Afrocarpus falcatus
  - Totara, Podocarpus totara
- Sciadopityaceae
  - Kusamaki, Sciadopitys species
- Taxaceae (Yew family)
  - Yew, Taxus species

Ginkgos (Ginkgophyta)


- Ginkgoaceae (Ginkgo family)
  - Ginkgo, Ginkgo biloba

Cycads (Cycadophyta)


- Cycadaceae family
  - Ngathu cycad, Cycas angulata
- Zamiaceae family
  - Wunu cycad, Lepidozamia hopei

Ferns (Pterophyta)


- Cyatheaceae and Dicksoniaceae families
  - Tree ferns, Cyathea, Alsophila, Dicksonia (not a monophyletic group)

Life stages

The life cycles of trees, especially conifers, are divided into the following stages in forestry for survey and documentation purposes: # Seed # Seedling: the above ground part of the embryo that sprout from the seed # Sapling: After the seedling reaches 1m tall, and until it reaches 7cm in stem diameter # Pole: young trees from 7-30cm diameter # Mature tree: over 30cm diameter, reproductive years begin # Old tree: dominate old growth forest; height growth slows greatly, with majority of productivity in seed production # Overmature: dieback and decay become common # Snag: standing dead wood # Log/debris: fallen dead wood Tree diameters are measured at height of between 1.3-1.5m above the highest point on the ground at its base. The 7cm diameter definition is economically based, from the smallest saleable stem size (for paper production, etc), and the 30cm diameter is the smallest base diameter for sawlogs. Each stage may be uniquely perceptive to different pathogens and suitable for especially adapted arboreal animals.

See also


- Arboretum
  - Pinetum
- Arboriculture (the care of trees)
- Bonsai
- Christmas tree
- Dendrology (the study of trees)
  - Dendrochronology
  - Dendroclimatology
- Ecology
  - Tree-line
- Forestry
  - Deforestation
  - Plantation
  - Urban Forestry
  - Woodland management
- Fruit trees
- List of famous trees
- List of garden plants
- Plants
- Prehistoric plants
- Tree climbing
- Trees in mythology
- Trees of the world
  - Trees of Britain and Ireland
  - Trees of Canada
  - List of U.S. state trees
  - Trees of The Caribbean Basin
  - Trees of Iran
  - List of trees of New Zealand
- Wood
  - List of woods

External links


- [http://www.globaltrees.org/default.asp GLOBAL TREES .org] Campaigning to save the world's most threatened trees
- [http://www.fssca.net/romero/ Romero Memorial Tree Project] Plant a tree in El Salvador

Bibliography


- Pakenham, T. (2002). Remarkable Trees of the World. ISBN 0297843001
- Pakenham, T. (1996). Meetings with Remarkable Trees. ISBN 0297832557 Category:Plants
-
- Category:Botany Category: plant morphology ms:Pokok ja:木 simple:Tree th:ต้นไม้

Tropical

The tropics are the geographic region of the Earth centered on the equator and limited in latitude by the two tropics: the Tropic of Cancer in the northern hemisphere and the Tropic of Capricorn in the southern hemisphere. This area lies approximately between 23°30'/23.5° N latitude and 23°30'/23.5° S latitude, and includes all the parts of the Earth where the sun reaches a point directly overhead at least once during the solar year. (In the temperate zones, north of the Tropic of Cancer and south of the Tropic of Capricorn, the sun never reaches an altitude of 90° or directly overhead.) The word "tropics" comes from Greek tropos meaning "turn", because the apparent position of the Sun oscillates between the two tropics with a period that defines the average length of a year. Tropical plants and animals are those species native to the tropics. Tropical is also sometimes used in a general sense of a place that is warm and moist year-round, often with the sense of lush vegetation. However, there are places in the tropics that are anything but "tropical" in this sense, with even alpine tundra and snow-capped peaks, including Mauna Kea, Mt. Kilimanjaro, and the Andes as far south as the northernmost parts of Chile and Argentina. In Köppen's scheme of climate classification, a tropical climate is defined as a non-arid climate in which all twelve months have mean temperatures above 18 °C (64.4 °F).

Examples of tropical cities


- Bombay, India (19.1º N)
- Hong Kong, Hong Kong SAR, People's Republic of China (22.3º N)
- Rio de Janeiro, Brazil (22.9º S)
- Singapore (1.4º N)
- Manila, Philippines (14.6º N)
- Cairns, Queensland, Australia (16.7º S)

See also


- Subtropical
- Tropical year
- Tropical disease Category:Climate ko:열대 ja:熱帯 zh-min-nan:Jia̍t-tài

Australia

The Commonwealth of Australia is a country in the Southern Hemisphere comprising the world's smallest continent and a number of islands in the Southern, Indian and Pacific Oceans. Australia's neighbouring countries are Indonesia, East Timor and Papua New Guinea to the north, the Solomon Islands, Vanuatu and New Caledonia to the northeast, and New Zealand to the southeast. The continent of Australia has been inhabited for over 40,000 years by Indigenous Australians. After sporadic visits by fishermen from the north and by European explorers and merchants starting in the 17th century, the eastern half of the continent was claimed by the British in 1770 and officially settled as the penal colony of New South Wales on 26 January 1788. As the population grew and new areas were explored, another five largely self-governing Crown Colonies were successively established over the course of the 19th century. On 1 January 1901, the six colonies federated and the Commonwealth of Australia was formed. Since federation, Australia has maintained a stable liberal democratic political system and remains a Commonwealth Realm. The current population of around 20.4 million is concentrated mainly in the large coastal cities of Sydney, Melbourne, Brisbane, Perth and Adelaide.

Origin and history of the name

The name Australia is derived from the Latin australis, meaning southern. Legends of an "unknown southern land" (terra australis incognita) date back to the Roman times and were commonplace in mediæval geography, but they were not based on any actual knowledge of the continent. The Dutch adjectival form Australische ("Australian," in the sense of "southern") was used by Dutch officials in Batavia to refer to the newly discovered land to the south as early as 1638. The first English language writer to use the word "Australia" was Alexander Dalrymple in An Historical Collection of Voyages and Discoveries in the South Pacific Ocean, published in 1771. He used the term to refer to the entire South Pacific region, not specifically to the Australian continent. In 1793, George Shaw and Sir James Smith published Zoology and Botany of New Holland, in which they wrote of "the vast island, or rather continent, of Australia, Australasia or New Holland." New Holland was established on this site.]] The name "Australia" was popularised by the 1814 work A Voyage to Terra Australis by the navigator Matthew Flinders. Despite its title, which reflected the view of the Admiralty, Flinders used the word "Australia" in the book, which was widely read and gave the term general currency. Governor Lachlan Macquarie of New South Wales subsequently used the word in his dispatches to England. In 1817 he recommended that it be officially adopted. In 1824, the British Admiralty agreed that the continent should be known officially as Australia.

History

England, claiming the land for Britain in 1770. This replica was built in Fremantle in 1988 for Australia's bicentenary.]] The first human habitation of Australia is estimated to have occurred between 42,000 and 48,000 years ago. The first Australians were the ancestors of the current Indigenous Australians; they arrived via land bridges and short sea-crossings from present-day India or Southeast Asia. Most of these people were hunter-gatherers, with a complex oral culture and spiritual values based on reverence for the land and a belief in the Dreamtime. The Torres Strait Islanders, ethnically Melanesian, inhabited the Torres Strait Islands and parts of far-north Queensland; they possess distinct cultural practices and practised subsistence agriculture. The first undisputed recorded European sighting of the Australian continent was made by the Dutch navigator Willem Jansz, who sighted the coast of Cape York Peninsula in 1606. During the 17th century, the Dutch charted the whole of the western and northern coastlines of what they called New Holland, but made no attempt at settlement. In 1770, James Cook sailed along and mapped the east coast of Australia, which he named New South Wales and claimed for Britain. The expedition's discoveries provided impetus for the establishment of a penal colony there following the loss of the American colonies that had previously filled that role. penal colony was Australia's largest penal colony.]] The British Crown Colony of New South Wales started with the establishment of a settlement at Port Jackson by Captain Arthur Phillip on 26 January 1788. This date was later to become Australia's national day, Australia Day. Van Diemen's Land, now known as Tasmania, was settled in 1803 and became a separate colony in 1825. Britain formally claimed the western part of Australia in 1829. Separate colonies were created from parts of New South Wales: South Australia in 1836, Victoria in 1851, and Queensland in 1859. The Northern Territory (NT) was founded in 1863 as part of the Province of South Australia. Victoria and South Australia were founded as "free colonies"—that is, they were never penal colonies, although the former did receive some convicts from Tasmania. Western Australia was also founded "free", but later accepted transported convicts due to an acute labour shortage. The transportation of convicts to Australia was phased out between 1840 and 1868. The Indigenous Australian population, estimated at about 350,000 at the time of European settlement, declined steeply for 150 years following settlement, mainly because of infectious disease, and forced migration, the removal of children and other colonial government policies, that some historians and Indigenous Australians have argued could be considered to constitute genocide by today's understanding. Such interpretations of Aboriginal history are disputed by some as being exaggerated or fabricated for political or ideological reasons. Following the 1967 referendum, the Federal government gained the power to implement policies and make laws with respect to Aborigines. Traditional ownership of land—native title—was not recognised until the High Court case Mabo v Queensland (No 2) overturned the notion of Australia as terra nullius at the time of European occupation. terra nullius ceremony in Port Melbourne, Victoria, 25 April 2005. Ceremonies such as this are held in virtually every suburb and town in Australia.]] A gold rush began in Australia in the early 1850s, and the Eureka Stockade rebellion in 1854 was an early expression of nationalist sentiment. Between 1855 and 1890, the six colonies individually gained responsible government, managing most of their own affairs while remaining part of the British Empire. The Colonial Office in London retained control of some matters, notably foreign affairs, defence and international shipping. On 1 January 1901, federation of the colonies was achieved after a decade of planning, consultation and voting, and the Commonwealth of Australia was born, as a Dominion of the British Empire. The Australian Capital Territory (ACT) was formed from New South Wales in 1911 to provide a location for the proposed new federal capital of Canberra (Melbourne was the capital from 1901 to 1927). The Northern Territory was transferred from the control of the South Australian government to the Commonwealth in 1911. Australia willingly participated in World War I; many Australians regard the defeat of the Australian and New Zealand Army Corps (ANZACs) at Gallipoli as the birth of the nation—its first major military action. Much like Gallipoli the Kokoda Track Campaign is regarded by many as a nation defining battle from World War II. The Statute of Westminster 1931 formally ended most of the constitutional links between Australia and Britain, but Australia did not adopt the Statute until 1942. The shock of Britain's defeat in Asia in 1942 and the threat of Japanese invasion caused Australia to turn to the United States as a new ally and protector. Since 1951, Australia has been a formal military ally of the US under the auspices of the ANZUS treaty. After World War II, Australia encouraged mass immigration from Europe; since the 1970s and the abolition of the White Australia policy, immigration from Asia and other parts of the world was also encouraged. As a result, Australia's demography, culture and image of itself were radically transformed. The final constitutional ties between Australia and Britain ended in 1986 with the passing of the Australia Act 1986, ending any British role in the Australian States, and ending judicial appeals to the UK Privy Council. Although Australian voters rejected a move to become a republic in 1999 by a 55% majority, Australia's links to its British past are increasingly tenuous. Since the election of the Whitlam Government in 1972, there has been an increasing focus on the nation's future as a part of the Asia-Pacific region.

Politics

Whitlam Government was opened in 1988 replacing the provisional Parliament House building opened in 1927.]] The Commonwealth of Australia is a constitutional monarchy and has a parliamentary system of government. Queen Elizabeth II is the Queen of Australia, a role that is distinct from her position as Elizabeth II of the United Kingdom. The Queen is nominally represented by the Governor-General; although the Constitution gives extensive executive powers to the Governor-General, these are normally exercised only on the advice of the Prime Minister. The most notable exercise of the Governor-General's reserve powers outside the Prime Minister's direction was the dismissal of the Whitlam Government in the constitutional crisis of 1975. There are three branches of government.
- The legislature: the Commonwealth Parliament, comprising the Queen, the Senate (the Red house), and the House of Representatives (the Green house); the Queen is represented by the Governor-General, who in practice exercises little or no power over the Parliament.
- The executive: the Federal Executive Council (the Governor-General as advised by the executive councillors); in practice, the councillors are the prime minister and ministers of state, whose advice the Governor-General accepts, with rare exceptions.
- The judiciary: the High Court of Australia and other federal courts. The State courts became formally independent from the Judicial Committee of the Privy Council when the Australia Act was passed in 1986. The bicameral Commonwealth Parliament consists of the Queen, the Senate (the upper house) of 76 senators, and a House of Representatives (the lower house) of 150 members. Members of the lower house are elected from single-member constituencies, commonly known as 'electorates' or 'seats'. Seats in the House of Representatives are allocated to states on the basis of population. In the Senate, each state, regardless of population, is represented by 12 senators, with the ACT and the NT each electing two. Elections for both chambers are held every three years; typically only half of the Senate seats are put to each election, because senators have overlapping six-year terms. The party with majority support in the House of Representatives forms Government, with its leader becoming Prime Minister. There are three major political parties: the Labor Party, the Liberal Party and the National Party. Independent members and several minor parties—including the Greens, Family First and the Australian Democrats—have achieved representation in Australian parliaments, mostly in upper houses, although their influence has been marginal. Since the 1996 election, the Liberal/National Coalition led by the Prime Minister, John Howard, has been in power in Canberra. In the 2004 election, the Coalition won control of the Senate, the first time that a party (or coalition of governing parties) has done so while in government in more than 20 years. The Labor Party is in power in every state and territory. Voting is compulsory in each state and territory and at the federal level.

States and territories

Voting is compulsory Australia consists of six states, two major mainland territories, and other minor territories. The states are New South Wales, Queensland, South Australia, Tasmania, Victoria and Western Australia. The two major mainland territories are the Northern Territory and the Australian Capital Territory. In most respects, the territories function similarly to the states, but the Commonwealth Parliament can override any legislation of their parliaments. By contrast, federal legislation overrides state legislation only with respect to certain areas as set out in Section 51 of the Constitution; all residual legislative powers are retained by the state parliaments, including powers over hospitals, education, police, the judiciary, roads, public transport and local government. Each state and territory has its own legislature (unicameral in the case of the Northern Territory, the ACT and Queensland, and bicameral in the remaining states). The lower house is known as the Legislative Assembly (House of Assembly in South Australia and Tasmania) and the upper house the Legislative Council. The heads of the governments in each state and territory are called premiers and chief ministers, respectively. The Queen is represented in each state by a governor; an administrator in the Northern Territory, and the Governor-General in the ACT, have analogous roles. Australia also has several minor territories; the federal government administers a separate area within New South Wales, the Jervis Bay Territory, as a naval base and sea port for the national capital. In addition Australia has the following, inhabited, external territories: Norfolk Island, Christmas Island, Cocos (Keeling) Islands, and several largely uninhabited external territories: Ashmore and Cartier Islands, Coral Sea Islands, Heard Island and McDonald Islands and the Australian Antarctic Territory.

Foreign relations and military

Over recent decades, Australia's foreign relations have been driven by a close association with the United States, through the ANZUS pact and by a desire to develop relationships with Asia and the Pacific, particularly through ASEAN and the Pacific Islands Forum. In 2005 Australia secured an inaugural seat at the East Asia Summit following its accession to the Treaty of Amity and Cooperation. Australia is a member of the Commonwealth of Nations, in which the Commonwealth Heads of Government meetings provide the main forum for co-operation. Much of Australia's diplomatic energy is focused on international trade liberalisation. Australia led the formation of the Cairns Group and APEC, and is a member of the OECD and the WTO. Australia has pursued several major bilateral free trade agreements, most recently the US–Australia Free Trade Agreement. Australia is a founding member of the United Nations, and maintains an international aid program under which some 60 countries receive assistance. The 2005–06 budget provides A$2.5bn for development assistance; as a percentage of GDP, this contribution is less than that of the UN Millennium Development Goals. Australia's armed forces—the Australian Defence Force (ADF)—comprise the Royal Australian Navy (RAN), the Australian Army, and the Royal Australian Air Force (RAAF). All branches of the ADF have been involved in UN and regional peacekeeping (most recently in East Timor, the Solomon Islands and Sudan), disaster relief, and armed conflict, including the 2003 Invasion of Iraq. The government appoints the chief of the Defence Force from one of the armed services; the current chief is Air Chief Marshal Angus Houston. In 2005–06, the defence budget is A$17.5bn.

Geography and climate

Angus Houston Australia's 7,686,850 km² (2,967,909 mi²) landmass is on the Indo-Australian Plate. Surrounded by the Indian, Southern and Pacific oceans, Australia is separated from Asia by the Arafura and Timor seas. Australia has a total 25,760 km (16,007 mi) of coastline and claims an extensive Exclusive Economic Zone of 8,148,250 km² or 3,146,057 mi² (excluding the Australian Antarctic Territory). Climate is highly influenced by ocean currents, including the El Niño southern oscillation, which is correlated with periodic drought, and the seasonal tropical low pressure system that produces cyclones in northern Australia. By far the largest part of Australia is desert or semi-arid. Australia is the driest inhabited continent, the flattest, and has the oldest and least fertile soils. Only the south-east and south-west corners of the continent have a temperate climate. The northern part of the country, with a tropical climate, has a vegetation consisting of rainforest, woodland, grassland and desert. The Great Barrier Reef, the world's largest coral reef, lies a short distance off the north-east coast and extends for over 2,000 km (1,250 mi). The world's two largest monoliths are located in Australia, Mount Augustus in Western Australia is the largest and Uluru in central Australia is the second largest. At 2,228 m (7,310 ft), Mount Kosciuszko on the Great Dividing Range is the highest mountain on the Australian mainland, although Mawson Peak on the remote Australian territory of Heard Island is taller at 2,745 m (9,006 ft).

Flora and fauna

Heard Island of the wallaby is currently being sequenced; when the sequencing is completed, it will be a major contribution to marsupial biology.]] Although most of Australia is semi-arid or desert, it covers a diverse range of habitats, from alpine heaths to tropical rainforests. Because of the great age and consequent low levels of fertility of the continent, its extremely variable weather patterns, and its long-term geographic isolation, much of Australia's biota is unique and diverse. About 85% of flowering plants, 84% of mammals, more than 45% of birds, and 89% of in-shore, temperate-zone fish are endemic. Many of Australia's ecoregions, and the species within those regions, are threatened by human activities and introduced plant and animal species. The federal Environment Protection and Biodiversity Conservation Act 1999 is a legal framework used for the protection of threatened species. Numerous protected areas have been created to protect and preserve Australia's unique ecosystems, 64 wetlands are registered under the Ramsar Convention, and 16 World Heritage Sites have been established. Australia was ranked 13th in the World on the 2005 Environmental Sustainability Index. Environmental Sustainability Index.]] Most Australian plant species are evergreen and many are adapted to fire and drought, including the eucalypts and acacias. Australia has a rich variety of endemic legume species that thrive in nutrient-poor soils because of their symbiosis with Rhizobia bacteria and mycorrhizal fungi. Well-known Australian fauna include monotremes (the platypus and echidna), and a host of marsupials, including the koala, kangaroo, wombat, and birds such as the emu, cockatoo, and kookaburra. The dingo was introduced by Austronesian people that traded with Indigenous Australians around 4000 BCE. Many plant and animal species became extinct soon after human settlement, including the Australian megafauna; many more have become extinct since European settlement, among them the Thylacine (Tasmanian Tiger).

Economy

Thylacine Australia has a prosperous, Western-style mixed economy, with a per capita GDP slightly higher than those of the UK, Germany and France. The country was ranked third in the United Nations' 2005 Human Development Index and sixth in The Economist worldwide quality-of-life index 2005. In recent years, the Australian economy has been resilient in the face of global economic downturn. Rising output in the domestic economy has been offsetting the global slump, and business and consumer confidence remains robust. Australia's emphasis on reform is another key factor behind the economy's strength. In the 1980s, the Labor Party, led by Prime Minister Bob Hawke and Treasurer Paul Keating, started the process of modernising the Australian economy by floating the Australian dollar in 1983, and deregulating the financial system. Since 1996, the Howard government has continued the process of micro-economic reform, including the partial deregulation of the labour market and the privatisation of state-owned businesses, most notably in the telecommunications industry. Substantial reform of the indirect tax system was achieved in July 2000 with the introduction of a 10% Goods and Services Tax, which has slightly reduced the heavy reliance on personal and company income tax that still characterises Australia's tax system. The Australian economy has not suffered a recession since the early 1990s. As of July 2005, unemployment was 5.0% with 10,030,300 persons employed. The service sector of the economy, including tourism, education, and financial services, comprises 69% of GDP. Agriculture and natural-resources represent only 3% and 5% of GDP, respectively, but contribute substantially to Australia's export performance. Australia's largest export markets include Japan, China, the United States, South Korea and New Zealand. Areas of concern to some economists include the chronically high current account deficit and also high levels of net foreign debt.

Demographics

current account deficit Most of the estimated 20.4 million Australians are descended from 19th- and 20th-century immigrants, the majority from Britain and Ireland. Australia's population has quadrupled since the end of World War I , spurred by an ambitious immigration program. In 2001, the five largest groups of the 27.4% of Australians who were born overseas were from the United Kingdom, New Zealand, Italy, Vietnam and China. Following the abolition of the White Australia policy, numerous government initiatives have been established to encourage and promote racial harmony based on a policy of multiculturalism. Australia’s population has increased by about 60 times since European settlement. The self-declared indigenous population—including Torres Strait Islanders, who are of Melanesian descent—was 410,003 (2.2% of the total population) in 2001, a significant increase from the 1977 census, which showed an indigenous population of 115,953. Indigenous Australians have higher rates of imprisonment and unemployment, lower levels of education and life expectancies for males and females that are 17 years lower than those of other Australians. Perceived racial inequality is an ongoing political and human rights issue for Australians. human rights.]] In common with many other developed countries, Australia is experiencing a demographic shift towards an older population, with more retirees and fewer people of working age. A large number of Australians (759,849 for the period 2002–03) live outside their home country. Australia has maintained one of the most active immigration programs in the world to boost population growth. Most immigrants are skilled; the quota includes categories for family members and refugees. English is the official language, and is spoken and written in a distinct variety known as Australian English. According to the 2001 census, English is the only language spoken in the home for around 80% of the population. The next most common languages spoken at home are Chinese (2.1%), Italian (1.9%) and Greek (1.4%). A considerable proportion of first- and second-generation migrants are bilingual. It is believed that there were between 200 and 300 Australian Aboriginal languages at the time of first European contact. Only about 70 of these languages have survived, and all but 20 of these are now endangered. An indigenous language remains the main language for about 50,000 (0.02%) people. Australia has a sign language known as Auslan, which is the main language of about 6,500 deaf people. The Australian Constitution guarantees the separation of church and state; there is no state religion. The 2001 census identified that 68% of Australians call themselves Christian: 27% identifying themselves as Roman Catholic and 21% as Anglican. Five per cent of Australians identify themselves as followers of non-Christian religions, and 26% as non-religious. Like many Western countries, the level of active participation in church worship is much lower than this; weekly attendance at church services is about 1.5 million, about 7.5% of the population. School attendance is compulsory throughout Australia between the ages of 6–15 years (16 years in South Australia and Tasmania), contributing to an adult literacy rate that is assumed to be 99%. Government grants have supported the establishment of Australia's 38 universities, and although several private universities have been established, the majority receive government funding. There is a state-based system of vocational training colleges, known as TAFE Institutes, and many trades conduct apprenticeships for training new tradespeople. Approximately 58% of Australians between the ages of 25 and 64 have vocational or tertiary qualifications.

Culture

apprenticeship.]] The primary basis of Australian culture up until the mid-20th century was Anglo-Celtic, although distinctive Australian features had been evolving from the environment and indigenous culture. Over the past 50 years, Australian culture has been strongly influenced by American popular culture (particularly television and cinema), large-scale immigration from non-English-speaking countries, and Australia's Asian neighbours. Australia has a long history of visual arts, starting with the cave and bark paintings of its indigenous peoples. From the time of European settlement, a common theme in Australian art has been the Australian landscape, seen in the works of Arthur Streeton, Arthur Boyd and Albert Namatjira, among others. The traditions of indigenous Australians are largely transmitted orally and are closely tied to ceremony and the telling of the stories of the Dreamtime. Australian Aboriginal music, dance and art have a palpable influence on contemporary Australian visual and performing arts. Australia has an active tradition of music, ballet and theatre; many of its performing arts companies receive public funding through the federal government's Australia Council. There is a symphony orchestra in each capital city, and a national opera company, Opera Australia, first made prominent by the renowned diva Dame Joan Sutherland; Australian music includes classical, jazz, and many popular music genres. Australian literature has also been influenced by the landscape; the works of writers such as Banjo Paterson and Henry Lawson captured the experience of the Australian bush. The character of colonial Australia, as embodied in early literature, resonates with modern Australia and its perceived emphasis on egalitarianism, mateship, and anti-authoritarianism. In 1973, Patrick White was awarded the Nobel Prize in Literature, the only Australian to have achieved this; he is recognised as one of the great English-language writers of the 20th century. Australian English is a major variety of the language; its grammar and spelling are largely based on those of British English, overlaid with a rich vernacular of unique lexical items and phrases, some of which have found their way into standard English. Australia has two public broadcasters (the ABC and SBS), three commercial television networks, three pay TV services, and numerous public, non-profit television and radio stations. Australia's film industry has achieved critical and commercial successes. Each major city has daily newspapers, and there are two national daily newspapers, The Australian and The Australian Financial Review. According to Reporters Without Borders in 2005, Australia is in 31st position on a list of countries ranked by press freedom, behind New Zealand (9th) and the United Kingdom (28th) but ahead of the United States. This ranking is primarily due to the limited diversity of commercial media ownership in Australia. Most Australian print media in particular is under the control of either News Corporation or John Fairfax Holdings. John Fairfax Holdings Sport is an important part of Australian culture, assisted by a climate that favours outdoor activities; 23.5% Australians over the age of 15 regularly participate in organised sporting activities. At an international level, Australia has particularly strong teams in cricket, field hockey, netball, rugby league, rugby union, and performs well in cycling and swimming. Australia has participated in every summer Olympic Games of the modern era, and every Commonwealth Games. Australia has hosted the 1956 and 2000 Summer Olympics, and has ranked among the top five medal-takers since 2000. It has also hosted the 1938, 1962 and 1982 Commonwealth Games, and will host the 2006 Commonwealth Games in Melbourne. Australian rules football is one of the most popular national sports, albeit it, one that is only played in Australia; players gain some international prominence through International Rules which is an annual meeting between the Australian code and Irish Gaelic Football. Corporate and government sponsorship of many sports and élite athletes is common in Australia. Televised sport is popular; some of the highest rating television programs include the summer Olympic Games and the grand finals of local and international football competitions.

Related topics

References

Gillespie, R. (2002). Dating the first Australians. Radiocarbon 44:455-472
Smith, L. (1980), The Aboriginal Population of Australia, Australian National University Press, Canberra
Tatz, C. (1999). [http://www.aiatsis.gov.au/rsrch/rsrch_dp/genocide.htm Genocide in Australia], AIATSIS Research Discussion Papers No 8, Australian Institute of Aboriginal and Torres Strait Islander Studies, Canberra
Windschuttle, K. (2001). [http://www.newcriterion.com/archive/20/sept01/keith.htm# The Fabrication of Aboriginal History], The New Criterion Vol. 20, No. 1, September 20.
Bean, C. Ed. (1941). [http://www.awm.gov.au/histories/ww1/1/index.asp Volume I - The Story of Anzac: the first phase], First World War Official Histories 11th Edition.
Australian Electoral Commission (2000). [http://www.aec.gov.au/_content/when/referendums/1999_report/index.htm 1999 Referendum Reports and Statistics]
Parliamentary Library (1997). [http://www.aph.gov.au/library/pubs/rn/1997-98/98rn25.htm The Reserve Powers of the Governor-General]
Australian Government. (2005). [http://www.budget.gov.au/ Budget 2005-2006]
Department of the Environment and Heritage. [http://www.deh.gov.au/biodiversity/about-biodiversity.html About Biodiversity]
Macfarlane, I. J. (1998). [http://www.rba.gov.au/PublicationsAndResearch/Bulletin/bu_oct98/bu_1098_2.pdf Australian Monetary Policy in the Last Quarter of the Twentieth Century]. Reserve Bank of Australia Bulletin, October
Parham, D. (2002). [http://www.pc.gov.au/research/confproc/mrrag/mrrag.pdf Microeconomic reforms and the revival in Australia’s growth in productivity and living standards]. Conference of Economists, Adelaide, 1 October
Australian Bureau of Statistics. Labour Force Australia. Cat#6202
Australian Bureau of Statistics. [http://www.abs.gov.au/ausstats/abs@.nsf/94713ad445ff1425ca25682000192af2/1a79e7ae231704f8ca256f720082feb9!OpenDocument Year Book Australia 2005]
Department of Foreign Affairs and Trade (2003). Advancing the National Interest, [http://www.dfat.gov.au/ani/appendix_one.pdf Appenidix 1]
Australian Bureau of Statistics. 2001 Census, [http://www.abs.gov.au/ausstats/abs@census.nsf/ddc9b4f92657325cca256c3e000bdbaf/7dd97c937216e32fca256bbe008371f0!OpenDocument A Snapshot of Australia]
Department of Immigration, Multicultural and Indigenous Affiars. (2005). [http://www.immi.gov.au/facts/06evolution.htm The Evolution of Australia's Multicultural Policy]
Parliament of Australia, Senate (2005). [http://www.aph.gov.au/Senate/committee/legcon_ctte/expats03/ Inquiry into Australian Expatriates]
[http://www.ncls.org.au/default.aspx?docid=2250&track=82083 NCLS releases latest estimates of church attendance], National Church Life Survey, Media release, 28 February 2004
Australian Film Commission. What are Australians Watching?, [http://www.afc.gov.au/gtp/freetv.html Free-to-Air, 1999-2004 TV]
Australian Bureau of Statistics, [http://www.abs.gov.au/Ausstats/abs@.nsf/0/68180154bf128d91ca2569d000164365?OpenDocument Population Growth - Australia’s Population Growth]

External links


- [http://wikitravel.org/en/Australia Wikitravel guide to Australia]
- [http://www.gov.au/ Australian Government Entry Portal]
- [http://www.australia.gov.au/ Commonwealth Government Online]
- [http://www.immi.gov.au/ Department of Immigration and Multicultural and Indigenous Affairs (DIMIA)]
- [http://www.dfat.gov.au/geo/australia/index.html DFAT: Country Information]
- [http://maps.google.com/maps?ll=-27.000000,133.000000&spn=38.871300,61.703613&t=h&hl=en Satellite images of Australia] (Google Maps)
- [http://www.nla.gov.au/ National Library of Australia]
- [http://www.nma.gov.au/ National Museum of Australia]
- [http://www.australia.com/ Official Australia Tourism Website]
- [http://www.bom.gov.au/ Bureau of Meteorology]
- [http://www.m2006.com.au/ Official website of the Melbourne 2006 Commonwealth Games] A Category:Continents Category:Island nations Category:Members of the Commonwealth of Nations Category:Monarchies Category:Oceanic countries zh-min-nan:Ò-tāi-lī-a ko:오스트레일리아 ms:Australia ja:オーストラリア simple:Australia th:ประเทศออสเตรเลีย

Deciduous

Deciduous means "temporary" or "tending to fall off" (deriving from the Latin word decidere, to fall off).

Botany

In botany, deciduous plants, principally trees and shrubs, are those that lose all of their foliage for part of the year. In some cases, the foliage loss coincides with the incidence of winter in temperate or polar climates, while others lose their leaves during the dry season in climates with seasonal variation in rainfall. The converse of deciduous is evergreen. Many deciduous plants flower during the period when they are leafless, as this increases the effectiveness of pollination. The absence of leaves improves wind transmission of pollen in the case of wind-pollinated plants, and increases the visibility of the flowers to insects in insect-pollinated plants. This strategy is not without risks, as the flowers can be damaged by frost, or in dry season areas, result in water stress on the plant.

Anatomy

In anatomy, deciduous teeth, also called milk teeth, are those that fall out during the course of normal development. Other body parts that are shed, such as antlers, are also described as deciduous. Category:Botany Category:Mouth

Dry season

The dry season is a term commonly used when describing the weather in the tropics. The weather in the tropics is dominated by the tropical rain belt, which oscillates from the northern to the southern tropics over the course of the year. The tropical rain belt lies in the southern hemisphere roughly from October to March, and during this time the northern tropics experience a dry season in which precipitation is very rare, and days are typically hot and sunny throughout. From April to September, the rain belt lies in the northern hemisphere, and the southern tropics experience their dry season. The rain belt reaches roughly as far north as the Tropic of Cancer and as far south as the Tropic of Capricorn. Near these latitudes, there is one wet season and one dry season annually. On the equator, there are two wet and two dry seasons as the rain belt passes over twice a year, once moving north and once moving south. Between the tropics and the equator, locations may experience a short wet and a long wet season. Local geography may substantially modify these climate patterns, however.

See also


- Wet season Category:SeasonsCategory:Weather ja:乾季

Fruits

In botany, a fruit is the ripened ovary—together with seeds—of a flowering plant. In many species, the fruit incorporates the ripened ovary and surrounding tissues. Fruits are the means by which flowering plants disseminate seeds. Evolution has led plants to adopt certain basic mechanisms, seemingly without close regard to the tissues involved. No one terminology really fits the enormous variety that is found among plant fruits. Botanical terminology for fruits is inexact and will remain so. In cuisine, when discussing fruit as food, the term usually refers to just those plant fruits that are sweet and fleshy, examples of which include plum, apple and orange. However, a great many common vegetables, as well as nuts and grains, are the fruit of the plant species they come from. The term false fruit (pseudocarp, accessory fruit) is sometimes applied to a fruit like the fig (a multiple-accessory fruit; see below) or to a plant structure that resembles a fruit but is not derived from a flower or flowers. Some gymnosperms, such as yew, have fleshy arils that resemble fruits and some junipers have berry-like, fleshy cones. With most fruits pollination is a vital part of fruit culture, and the lack of knowledge of pollinators and pollenizers can contribute to poor crops or poor quality crops. In a few species, the fruit may develop in the absence of pollination/fertilization, a process known as parthenocarpy. Such fruits are seedless. A plant that does not produce fruit is known as acarpous, meaning essentially "without fruit".

Botanic fruits and culinary fruits

Many foods are botanically a fruit, but are treated as vegetables in cooking. These include cucurbits (e.g. squash and pumpkin), maize, tomatoes, cucumber, aubergines (eggplants) and green peppers, along with nuts, and some spices, such as allspice, nutmeg and chiles. Rarely, culinary "fruits" are not fruits in the botanical sense. For example, rhubarb may be considered a fruit, though only the astringent stalk, or petiole, is edible. In the commercial world, European Union rules define carrot as a fruit for the purposes of measuring the proportion of "fruit" contained in carrot jam.

Fruit development

After an ovule is fertilized in a process known as pollination, the ovary begins to expand. The petals of the flower fall off and the ovule develops into a seed. The ovary eventually comes to form, along with other parts of the flower in many cases, a structure surrounding the seed or seeds that is the fruit. Fruit development continues until the seeds have matured. With some multiseeded fruits the extent of development of the flesh of the fruit is proportional to the number of fertilized ovules. The wall of the fruit, developed from the ovary wall of the flower, is called the pericarp. The pericarp is often differentiated into two or three distinct layers called the exocarp (outer layer - also called epicarp), mesocarp (middle layer), and endocarp (inner layer). In some fruits, especially simple fruits derived from an inferior ovary, other parts of the flower (such as the floral tube, including the petals, sepals, and stamens), fuse with the ovary and ripen with it. When such other floral parts are a significant part of the fruit, it is called an accessory fruit. Since other parts of the flower may contribute to the structure of the fruit, it is important to study flower structure to understand how a particular fruit forms. Fruits are so varied in form and development, that it is difficult to devise a classification scheme that includes all known fruits. It will also be seen that many common terms for seeds and fruit are incorrectly applied, a fact that complicates understanding of the terminology. Seeds are ripened ovules; fruits are the ripened ovularies or carpels that contain the seeds. To these two basic definitions can be added the clarification that in botanical terminology, a nut is a type of fruit and not another term for seed. There are three basic types of fruits: # Simple fruit # Aggregate fruit # Multiple fruit

Simple fruit

Simple fruits can be either dry or fleshy and result from the ripening of a simple or compound ovary with only one pistil. Dry fruits may be either dehiscent (opening to discharge seeds), or indehiscent (not opening to discharge seeds). Types of dry, simple fruits (with examples) are:
- achene - (buttercup)
- capsule - (Brazil nut)
- caryopsis - (wheat)
- fibrous drupe - (coconut, walnut)
- follicle - (milkweed)
- legume - (pea, bean, peanut)
- loment
- nut - (hazelnut, beech, oak acorn)
- samara - (elm, ash, maple key)
- schizocarp - (carrot)
- silique - (radish)
- utricle Fruits in which part or all of the pericarp (fruit wall) is fleshy at maturity are simple fleshy fruits. Types of fleshy, simple fruits (with examples) are:
- berry - (tomato, avocado)
- drupe - (plum, cherry, peach, olive)
- false berry - accessory fruits (banana, cranberry)
- pome - accessory fruits (apple, pear, rosehip)

Aggregate fruit

rosehip An aggregate fruit, or etaerio, develops from a flower with numerous simple pistils. An example is the raspberry, whose simple fruits are termed drupelets because each is like a small drupe attached to the receptacle. In some bramble fruits (such as blackberry) the receptacle is elongate and part of the ripe fruit, making the blackberry an aggregate-accessory fruit. The strawberry is also an aggregate-accessory fruit, only one in which the seeds are contained in achenes. In all these examples, the fruit develops from a single flower with numerous pistils.

Multiple fruit

A multiple fruit is one formed from a cluster of flowers (called an inflorescence). Each flower produces a fruit, but these mature into a single mass. Examples are the pineapple, edible fig, mulberry, osage-orange, and breadfruit. breadfruit In the photograph on the right, stages of flowering and fruit development in the noni or Indian mulberry (Morinda citrifolia) can be observed on a single branch. First an inflorescence of white flowers called a head is produced. After fertilization, each flower develops into a drupe, and as the drupes expand, they connate (merge) into a multiple fleshy fruit called a syncarp.

Seedless Fruits

Seedlessness is an important feature of some fruits of commerce. Commercial cultivars of bananas and pineapples are seedless. Some cultivars of citrus fruits (especially navel oranges and mandarin oranges), table grapes, grapefruit, and watermelons are valued for their seedlessness. In some species, seedlessness is the result of parthenocarpy, where fruits set without fertilization. Parthenocarpic fruit set may or may not require pollination. Most seedless citrus fruits require a pollination stimulus; bananas and pineapples do not. Seedlessness in table grapes results from the abortion of the embryonic plant that is produced by fertilization, a phenomenon known as stenospermocarpy which requires normal pollination and fertilization.

Seed dissemination

Variations in fruit structures largely relate to dissemination (called dispersal) of the seeds they contain. Some fruits have coats covered with spikes or hooked burrs, either to prevent themselves from being eaten by animals or to stick to the hairs of animals, using them as dispersal agents. Other fruits are elongated and flattened out naturally and so become thin, like wings or helicopter blades. This is an evolutionary mechanism to increase dispersal distance away from the parent.

Uses

Many fruits, including fleshy fruits like apple and mango, and nuts like walnut, are commercially valuable as human food, eaten both fresh and made into jams, marmalade and other preserves for future consumption. Fruits are also found commonly in such manufactured foods as cookies, muffins, yoghurt, ice cream, cakes, and many more.

See also


- List of fruits
- Fruit trees
- Tutti frutti
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