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How Species Interact
Roger ArditiLev R. Ginzburg
其他書名
Altering the Standard View on Trophic Ecology
出版Oxford University Press, USA, 2012-05-11
主題Mathematics / Probability & Statistics / GeneralScience / Life Sciences / BiologyScience / Life Sciences / EcologyScience / Life Sciences / Zoology / General
ISBN01999138389780199913831
URLhttp://books.google.com.hk/books?id=c2m6XspGs-cC&hl=&source=gbs_api
EBookSAMPLE
註釋Understanding the functioning of ecosystems requires the understanding of the interactions between consumer species and their resources. How do these interactions affect the variations of population abundances? How do population abundances determine the impact of predators on their prey? The view defended in this book is that the "null model" that most ecologists tend to use is inappropriate because it assumes that the amount of prey consumed by each predator is insensitive to the number of conspecifics. The authors argue that the amount of prey available per predator, rather than the absolute abundance of prey, is the basic determinant of the dynamics of predation. This so-called ratio dependence is shown to be a much more reasonable "null model."