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| Rainforests are one of the greatest and most
fascinating wonders of nature. They are home to at least 50% of all living
animal and plant species on the planet. The diversity of species, in particular
in the tropical rainforests, is unequalled. Although rainforests cover
only about 0.3 % of Australia, they contain about half of all Australian
plant families and about a third of Australia's mammal and bird species.
Basically there are three types of rainforests:
Subtropical and some temperate rainforests occur in NSW (307 284 ha) and south east Queensland (59 223 ha) as discontinuous patches and are on the list of the UNESCO World Heritage as the Central Eastern Rainforest Reserves (CERR) . They include the most extensive areas of subtropical rainforest in the world, large areas of warm temperate rainforest and nearly all of the Antarctic beech cool temperate rainforest. They mainly are held in National Park tenure likewise. A very common tree there is the Booyong (picture to the right). |
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Tropical
and subtropical rainforests in the lowland usually have
four very distinct layers with different plants and animals, adapted
for life in that particular area:
Emergent trees are spaced wide apart, and are 164 to 240 feet (50 - 70 m) tall with umbrella-shaped canopies that grow above the forest. Eagles, butterflies, bats and certain monkeys inhabit this layer. The upper canopy usually consists
of 100 to 130 ft tall trees (30 - 40 m), which form with their adjacent
tree tops a more or less close roof over the two remaining layers. It is
the area with the biggest diversity of species and it is understood to
be home to 40% of all plant species! The fauna The understorey gets only little sunshine and one can find here many shrubs, 60 ft. (18 m) trees and young growth. It is home for an abundance of birds, snakes, lizards and insects, but also for predators, like jaguars, leopards, boa constrictors and armadillos. The forest floor is in constant shade. Thus, the forest floor has almost no vegetation and the humid, warm conditions promote a rapid decay of plant and animal matter. Many forms of fungi and giant anteaters can be found here. However - where there is no close canopy for any reason and the sunlight can reach the ground of the rainforest, as along the river banks, an impenetrable jungle will develop quickly. And this was, what we experienced at the rainforest village Kuranda - jungle in the rainforest - an exciting experience! |
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