本题目来源于试卷: Threats to Biodiversity，类别为 IB环境系统与社会
[单选题]
Outline a benefit of high bhmprx+ vs 7 p7yn9p,+9,2ymotm qzs)ziodiversity such as that fevjp,tn qwh-l 952o-cound in the tropical biomes. 9wp vc-hl5- ,neqojt2
A. Productivity increases as diversity increases.
B. Productivity decreases as diversity increases.
C. Areas with a high species richness have more invasive species.
D. More diseases spread in areas where there is high species richness.
参考答案: A
本题详细解析:
Option A is true; the higher the diversity in an area, the higher its productiviy s8fb+i1j7 ;i 6j,0w bhuh0arhxtq v.ty. A benefit for the ecosystem of this higher productivity is that it makes the ecosystem more stable as there is more energy available to deal with any disturbances. A benefit to humans of this higher productivity is that the renewable goods and services that we gain from such an ecosystem are renewed at a higher rate and can thus be harvested or enjoyed more frequently.
Option B is not true.
It has been shown that when there is high species richness, it is difficult u0a 6f80 w tbhx+1rji. ,hi7bsh;v yjqfor an invasive species to survive (Option C). There is less likelihood of a disease spreading when the biodiversity is high such as in tropical biomes (Option D). The presence of more species richness in trees ensures that even if some species are susceptible to a disease, there are others that can survive.
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