Temperate rainforest

Temperate rainforests are coniferous or broadleaf forests that occur in the temperate zone and receive heavy rainfall.

For temperate rain forests of North America, Alaback's definition is widely recognized:

However, required annual precipitation depends on factors such as distribution of rainfall over the year, temperatures over the year and fog presence, and definitions in other countries differ considerably. For example, Australian definitions are ecological-structural rather than climatic:

The latter would, for example, exclude a part of the temperate rain forests of western North America, as Coast Douglas-fir, one of its dominant tree species, requires stand-destroying disturbance to initiate a new cohort of seedlings. The North American definition would in turn exclude a part of temperate rain forests in other countries.

Temperate forests cover a large part of the Earth, but temperate rainforests only occur in a few regions around the world. Most of these occur in oceanic moist climates: the Pacific temperate rain forests in Western North America (Southeastern Alaska to Central California), the Valdivian and Magellanic temperate rainforests of southwestern South America (Southern Chile and adjacent Argentina), pockets of rain forest in Northwestern Europe (southern Norway to northern Iberia), temperate rainforests of southeastern Australia (Tasmania and Victoria) and the New Zealand temperate rainforests (South Island's west coast).

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