In Europe, it is undoubtedly the mountain ecosystem which has changed most rapidly and is most at risk.

在欧洲，变化最快、风险最大的无疑是山地生态系统。

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In this paper, the general situation of mountain ecosystem was briefly introduced and the effects of keystone populations on the degraded ecosystem were discussed.

简要介绍了岷江上游山地生态系统的概况，讨论了关键种群在退化生态系统研究中的作用和意义。

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But as global warming snakes its way into higher altitudes, a less-welcome resident in taking up space in this fragile ecosystem: the mountain pine beetle.

但是随着全球变暖向高海拔地区蔓延，一个不受欢迎的居民进入了这个脆弱的生态环境：山地松树甲虫。

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Warming temperatures are also threatening the many kinds of plants and animals that live in this mountain ecosystem.

VOA: special.2009.04.22

The workshop will further help to develop policy directives for climate resilient development and ecosystem-based adaptation for mountain communities.

UNESCO: Impacts of climate change on Asia��s mountains

But if you have a question for Carole King about the link between her music and her activism, or if you live in the mountain west and you're concerned about the ecosystem there, our number is 800-989-8255.

NPR: Rocky Mountain Activist Carole King