在较长食物链中，捕食者与猎物的体型比例更小。
Smaller predator-prey body size ratios in longer food chains.
作者信息
Jennings Simon, Warr Karema J
机构信息
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory, Lowestoft NR33 0HT, UK.
出版信息
Proc Biol Sci. 2003 Jul 7;270(1522):1413-7. doi: 10.1098/rspb.2003.2392.
Maximum food-chain length has been correlated with resource availability, ecosystem size, environmental stability and colonization history. Some of these correlations may result from environmental effects on predator-prey body size ratios. We investigate relationships between maximum food-chain length, predator-prey mass ratios, primary production and environmental stability in marine food webs with a natural history of community assembly. Our analyses provide empirical evidence that smaller mean predator-prey body size ratios are characteristic of more stable environments and that food chains are longer when mean predator-prey body size ratios are small. We conclude that environmental effects on predator-prey body size ratios contribute to observed differences in maximum food-chain length.
最大食物链长度与资源可用性、生态系统规模、环境稳定性和殖民历史相关。其中一些相关性可能源于环境对捕食者 - 猎物体型比的影响。我们通过群落组装的自然历史来研究海洋食物网中最大食物链长度、捕食者 - 猎物质量比、初级生产力和环境稳定性之间的关系。我们的分析提供了实证证据，表明较小的平均捕食者 - 猎物体型比是更稳定环境的特征，并且当平均捕食者 - 猎物体型比小时，食物链更长。我们得出结论，环境对捕食者 - 猎物体型比的影响导致了观察到的最大食物链长度的差异。
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