While tropical rainforests grow in tropical climates, temperate
rainforests grow in cooler climate. They get less rain that tropical
rainforests,
and they often grow relatively close to the ocean, where there is
marine climate with cool summers and mild winters. They often have
summer fog, and bushfires are not common in these forests, mainly
because they are very moist.
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Temperate Rainforest Plants Species Richness
Temperate rainforests are not quite as species rich as are tropical
rainforests, and the plants of those rainforests are mainly trees.
There are no vines, lianas or palm trees.
There are many epiphytes, including a wide variety of mosses and
lichens. At least 70% of temperate rainforest is closed by tree canopy.
Those forests don’t need fire, the seeds on plants are able to
regenerate without fire disturbance. Eucalypt
forests are not rainforests, but in absence of fire eucalypt forests
may develop to rainforests. There are three types of non-tropical
rainforests in Australia:
Warm-temperate, cool-temperate, and subtropical.
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Warm Temperate Rainforest Plants in Australia
Australian warm temperate rainforests are found in coastal ranges in
southern Queensland, New
South Wales and Victoria.
They receive 1300mm rainfall a year. They have two layers: an upper
layer of tall tree canopy, and a lower layer of tree ferns.
There are up to about 15 species of trees like hoop pines, bunya pines
and brush box. These forests typically support species like Coachwood (Ceratopetalum
apetalum), Australian Sassafras (Doryphora sassafras),
and
Lilly Pilly (Syzygium smithii).
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Cool Temperate Rainforest Plants in Australia
Australian cool temperate rainforests are mostly found in Tasmania,
but also on the southern coast of Victoria, like Otway National Park,
Dandedong Ranges, and even Border Ranges and Lamington National Park in
New South Wales and Queensland. Those forests typically get 1750-3000mm
of rain a year. They are very rich on mosses, and they are often misty
even when it’s not raining. Cool rainforests also have two layers: tree
ferns
below and large, massive trees (which Tasmania is famous for), highest
up. Those trees don’t have buttress roots as do tropical rainforests,
and there are not many vines or epiphytes. There are many trees that
evolved on Gondwanaland, like Southern Beech (Nothofagus moorei),
Myrtle Beech (Nothofagus cunnunghamii), Pinkwood (Eucryphia
moorei), Huon pine, pencil pine, celery-top pine, King Billy
Pine
and Sassafras.
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Subtropical Rainforest Plants
The third type of non-tropical rainforests, the subtropical rainforest,
is found in northern New South Wales and southern Queensland,
where an excellent example is Fraser
Island. Like tropical rainforests, they
contain palm
trees,
epiphytes, vines and buttressed trees, and they are generally lusher
than are temperate rainforests. They have either two or three layers,
and their canopy is more complex than this of temperate rainforests.
They are also much richer in species and support about 100 tree species
per 10ha. A few examples include booyong (Argyrodendron spp.),
Yellow Carabeen (Sloanea woollsii), fig trees (Ficus
spp.),
Rosewood (Dysoxylum fraserianium) and Lilli Pillies (Syzygium
spp.).
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