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Temperate rainforests are coniferous or broadleaf forests that occur in the temperate zone and receive high rainfall. ==Definition== For temperate rain forests of North America, Alaback's definition〔 is widely recognized:〔(【引用サイトリンク】title=A Review of Past and Current Research )〕 : Annual precipitation over : Mean annual temperature is between 4 and 12 °C (39 and 54 °F). 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: : Closed canopy of trees excludes at least 70% of the sky; : Forest is composed mainly of tree species which do not require fire for regeneration, but with seedlings able to regenerate under shade and in natural openings.〔Floyd, A. (1990) ''Australian Rainforests in New South Wales, Volume 1''. Surrey Beatty & Sons Pty Ltd, Chipping Norton, NSW, ISBN 0949324302.〕 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.〔(【引用サイトリンク】title=Pseudotsuga menziesii var. menziesii )〕 The North American definition would in turn exclude a part of temperate rain forests in other countries. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Temperate rainforest」の詳細全文を読む スポンサード リンク
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