Plankton effect on cod recruitment in the North Sea
Plankton effect on cod recruitment in the North Sea
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DOI：
10.1038/nature02164
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发表时间：
2003-12-11
期刊：
影响因子：
64.8
通讯作者：
Reid, PC
中科院分区：
文献类型：
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作者：
Beaugrand, G;Brander, KM;Reid, PC
大西洋鳕（Gadus morhua L.）自1960年代后期以来，北海的鳕鱼一直被过度开发，人们对鳕鱼生物量和补充量的下降表示极大的关切（1）。在这里我们表明，除了过度捕捞的影响（1），浮游生物的波动导致了北海鳕鱼补充量的长期变化（自下而上的控制）。幼鳕鱼的生存取决于三个关键的生物参数，他们的猎物：猎物的平均大小，季节性的时间和丰富。我们提出了一种机制，涉及匹配/不匹配假设（2），通过这种机制，温度的变化影响了幼鳕鱼的生存，并得出结论，自20世纪80年代中期以来，温度上升已经改变了浮游生物生态系统，降低了幼鳕鱼的生存。
The Atlantic cod ( Gadus morhua L.) has been overexploited in the North Sea since the late 1960s and great concern has been expressed about the decline in cod biomass and recruitment(1). Here we show that, in addition to the effects of overfishing(1), fluctuations in plankton have resulted in long- term changes in cod recruitment in the North Sea ( bottom- up control). Survival of larval cod is shown to depend on three key biological parameters of their prey: the mean size of prey, seasonal timing and abundance. We suggest a mechanism, involving the match/ mismatch hypothesis(2), by which variability in temperature affects larval cod survival and conclude that rising temperature since the mid- 1980s has modified the plankton ecosystem in a way that reduces the survival of young cod.