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]
Determine which of the following sequences/ mcy-ah tz.rrqhp2 -w8o-sk4 is an example of a.l) a2o4j3zh1 psqbbl9 2ooo v negative feedback olobjplv9)2so 3q2. ao1b4 zhmechanism.
A. Deforestation → → fewer trees → → more run off → → less infiltration into soil → → less water for trees → → fewer trees
B. Increase in temperature → → increase in cloud cover → → decrease in temperature → → decrease in cloud cover → → increase in temperature
C. Increase in primary production → → increase in falling leaves → → increase in soil organic matter → → increase in soil nutrients → → increase in primary production
D. Thawing of permafrost → → bacteria break down organic matter → → release of methane into atmosphere → → increase in temperature → → thawing of permafrost
参考答案: B
本题详细解析:
Negative feedback loops will negate the change and bring the ir iwbors(it7 i5flu:8ypbc/-h g (2 9system back to the originalr7bi/ h o- :fcbwi(ligu 2 i5typ(sr89, maintaining an equilibrium with small fluctuations.
Positive feedback loops will destabilize the system and amplify the changes as shown in options A, C and D.
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