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]
Identify the stage in succe2 /vfyn5z c(q.myu ez,ssion that is most likely to/ih7tzl3/qvo)fil u8 (.6x it;k bi ep show resilience and the ability to withstand ch/(8i; )l oiilp6v./qu h f7izet3bxktanges.
A. Pioneer community when abiotic conditions are poor
B. Pioneer community with the growth of lichens and grasses
C. Intermediate stages of succession when consumers join the food chain
D. Climax community when food chains are fully developed
参考答案: D
本题详细解析:
Climax communities are reached wheos:,h-w ,oj wen secondary productivity is at a maximum and complex food webs exist in the community. This community is stable and resilient to diseases and other unforeseen changes thatw:e h,oj w,o-s may occur because there are many organisms that can compensate. Negative feedback cycles maintain equilibrium at this stage and can avoid tipping points.
Options A and B are the early stages of succession, when productivity is low, food chains are simple and the ecosystem is unstable.
The intermediate stages of succession (Option C) tend to have more complex food chains but not very complex food webs; they are not as stable as the climax stages. Secondary productivity will start to increase as more consumers join the food chain and the system becomes more stable than pioneer communities.
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