2. 职称英语
  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  42
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, since the early 1990s, sea urchins in the waters east of Cape Hangklip have
选项 A、significantly changed their feeding habits
B、suffered increased predation from a certain species
C、experienced increased competition for kelp, their main source of nourishment
D、seen a sharp decline in the availability of kelp, due to environmental changes
E、rebounded as commercial fishing in the region has declined
答案 B
解析 原文关于海胆有两个信息，一是被岩龙虾捕食了，二是其觅食行为可以保护小鲍鱼。a certain species对应rock lobster，根据文章第四句，海胆遭受了来自岩龙虾越来越多的捕食。A项文中未提及。C项文中未提及。D项文中未提及。E项文中未提及。
转载请注明原文地址:http://tihaiku.com/zcyy/3349578.html
相关试题推荐
随机试题
最新回复(0)