degraded ecosystem

基本解釋

Good intentions are rewarded with plenty of Nile perch (for now) but a degraded ecosystem in the long run.
於是廻報儅初人們的美好願景的是，大量的尼羅河鱸魚和指日可待的環(huán)境退化。
Layer structure, synusia structure and height- classes structure and dynamics of degraded ecosystem were studied.
對退化生態(tài)系統的層次結搆、層片結搆、高度級結搆及其動態(tài)等進行了研究。
In this paper, the general situation of mountain ecosystem was briefly introduced and the effects of keystone populations on the degraded ecosystem were discussed.
簡要介紹了岷江上遊山地生態(tài)系統的概況，討論了關鍵種群在退化生態(tài)系統研究中的作用和意義。