本题目来源于试卷: IB ESS Unit 1 Foundations of ESS，类别为 IB环境系统与社会
[单选题]
State which of the fok2,zcw f*9gsf hdo n.,ll,i ga khfrr: 66b baof(+c,-rdowing is likely to lead an ecosystem to a tipping point.
A. An ecosystem that is in steady state equilibrium
B. An ecosystem in which negative feedback loops exist
C. An ecosystem in which positive feedback loops exist
D. An ecosystem that has diverse, mature trees
参考答案: C
本题详细解析:
Positive feedback loops amplify changpjx:2 cli4d yt*m - l9my8*waie and keep moving the system further and furthetlx4 yp*8 2aijmi*9 -:cw ldymr away from equilibrium until it reaches a tipping point.
Option A is an ecosystem that does not show much changes in the long term but can have a few oscillations in the short term.
Option B is an ecosystem that has enough diversity and storages to counteract any deviation, bringing the system back to the original.
Option D is an ecosystem that is stable and has enough diversity and storages to not be affected by small changes that occur. It has a climax community.
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