It is a variety of wild animals of the primeval forest survival.

它本是一座各种野兽赖以生存的原始森林。

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Even more than mountainside slides of mud or snow, naturally occurring forest fires promote the survival of aspen trees.

自然发生的森林火灾甚至比山体滑坡或积雪更能促进白杨树的生长。

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Rainforests have their own perfect system for ensuring their own survival; the tall trees make a canopy of branches and leaves which protect themselves, smaller plants, and the forest animals from heavy rain, intense dry heat from the sun and strong winds.

雨林有自己完善的系统来确保自身的生存；高大的树木有枝叶形成的树冠层来保护自身，树冠也保护着矮小的植物以及动物不受暴雨、酷暑及强风的侵扰。

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As well as destabilizing human communities, logging also threatens to decimate an ecosystem that is critical for the survival of wildlife including forest elephants and endangered apes such as gorillas, chimpanzees and bonobos.

CNN: Logging decimates African rainforest

There is already so little old-growth forest left that it threatens the long-term survival of many plant and animal species, so continuing to log such forests is deeply irresponsible.

FORBES: IKEA Under Fire for Clearing Ancient Russian Forest

Selective logging and conversion of rain forest habitat to agricultural land are the greatest threats to the survival of the white-collared lemur, together with hunting, according to the IUCN website.

BBC: Linton Zoo celebrates rare white-collared lemur birth