predator n.食肉动物
decomposer n.腐生物;分解体
subtlety n ,微妙,精妙
注释:
2. nest building :筑巢
4. an increase in density and diversity of other animal groups :其他动物群体在数量和品种上的增长。
6. biodiversity :物质名词,由bio和diversity 两部分组成,意为生物多样性。
8. below ground processes :土壤下面的过程,即影响生态环境的过程。
1 .Why are ants compared to ecosystem engineers?
B Because they collect food.
D Because they are predators.
A prey on small as well as large animals.
C collect food as decomposers.
3. Dir Sanders study centered on how ants
B defend their resources and territory against other predators.
D produce such a big impact on the environment.
A Ants bring about a negative influence to an area when their population is small.
C Ants predation counteracts the positive influence they may have on an area.
5. What still remains unclear about ants, according to the last paragraph?
B How do ants affect the animal diversity in a given ecosystem?
D How do ants alter the physical and chemical environment?
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