Good intentions are rewarded with plenty of Nile perch (for now) but a degraded ecosystem in the long run.

于是回报当初人们的美好愿景的是，大量的尼罗河鲈鱼和指日可待的环境退化。

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Layer structure, synusia structure and height - classes structure and dynamics of degraded ecosystem were studied.

对退化生态系统的层次结构、层片结构、高度级结构及其动态等进行了研究。

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The main results are as follows: 1 . Woody plant density in degraded ecosystem is in close relation with restoration stage of vegetation.

结果表明：1。退化生态系统木本植物的密度与植被的恢复阶段紧密相关；

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The first Millennium Ecosystem Assessment report, released in March, warned that approximately 60 percent of the ecosystem supporting life on Earth was being degraded or used unsustainably and that the consequences of degradation could grow significantly worse in the next half century.

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