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  3. The waters east of Cape Hangklip were once the center of a lucrative wild-ca

The waters east of Cape Hangklip were once the center of a lucrative wild-ca

游客2024-01-10  47
问题     The waters east of Cape Hangklip were once the center of a lucrative wild-caught abalone fishery, but illegal fishing in the mid-1990s escalated to such levels that the recreational fishery was closed in 2003. When abalones did not rebound, commercial fishing was also banned. Continue declines in abalone were attributed to poaching, but an invasion by rock lobsters during the early 1990s probably intensified the trend. Rock lobsters prey on sea urchins, and increased rock lobster densities coincided with significant decreases in urchins. In that area, urchins feed largely by trapping drift kelp, and in doing so provide juvenile abalone with both protective shelter and nourishment. Without urchins’ presence, juvenile abalones are less likely to survive to adulthood. [br] According to the passage, which of the following is a true statement about the feeding behaviors of sea urchins?
选项 A、They change according to the type of food available in an area.
B、They are responsible for the decline of abalones in some regions.
C、They have a significant impact on the young of another species.
D、They make sea urchins more vulnerable to potential predators.
E、They result in a marked decline in kelp in certain regions.
答案 C
解析 根据原文第五句，海藻的捕食行为可以给小鲍鱼提供保护，因此选项C正确。the young of another species对应原文的juvenile abalones，a significant impact对应provide juvenile abalone with both protective shelter and nourishment。A项文中未提及。B项是岩龙虾的入侵导致鲍鱼减少，而不是海胆的觅食行为，海胆是保护鲍鱼的。D项文中未提及。E项表述太极端，海胆确实吃海藻，但是不见得导致海藻数量“显著下降”。
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