生态网络的拓扑结构和流量信息

来源:作者: 发布时间:2014-05-19 浏览次数:556

 

   以往对于生态食物网的研究大多集中在网络的拓扑结构上,而忽略了网络上的流量信息。当我们将流量考虑进来,就发现了一些新的普适的统计规律,包括:物种总生物量与总新陈代谢的异速标度律、物种总耗散与总流量之间的”耗散律“,以及流量之间的”引力定律“等等。

 

 

研究成果:

Common Patterns of Energy Flow and Biomass Distribution on Weighted Food Webs

Weights of edges and nodes on food webs which are available from the empirical data hide much information about energy flows and biomass distributions in ecosystem. We define a set of variables related to weights for each species , including the throughflow , the total biomass , and the dissipated flow  (output to the environment) to uncover the following common patterns in 19 empirical weighted food webs: (1) DGBD distributions (Discrete version of a Generalized Beta Distribution), a kind of deformed Zipf's law, of energy flow and storage biomass; (2) The allometric scaling law , which can be viewed as the counterpart of the Kleiber's 3/4 law at the population level; (3) The dissipation law ; and (4) The gravity law, including univariate version  and bivariate approvement 
 
原文链接:
/ckfinder/userfiles/files/Common%20Patterns%20of%20Energy%20Flow%20and%20Biomass(1).pdf