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 following is likely to ljul27n kaq 1*pead an ecosystem66tj5(dct)0 t xbkkaay vw1tq0j8l 1o 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 change and keep moving the system furthekvig2:jsiwzq8d h 0( /r and further away from equilibrium until it reacheiq v:w0 h(jdki8sg/z2s 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.
| 
