论文标题
在流网络中最大化种群生长速率和生物量
Maximizing Metapopulation Growth Rate and Biomass in Stream Networks
论文作者
论文摘要
我们将流媒体网络上的逻辑化种群模型视为人群持久性不同方面的指标。我们的目标是找到最大化这些持久性措施的资源分布。我们通过考虑由三个节点组成的流网络开始我们的研究，并证明最大化总生物量的策略是将所有资源集中在最上游位置。相反，当扩散速率足够小时，当所有资源集中在最下游的位置之一中时，种群生长速率将最大化。这两个主要结果概括为带有任何数量的补丁的流网络。
We consider the logistic metapopulation model over a stream network and use the metapopulation growth rate and the total biomass (of the positive equilibrium) as metrics for different aspects of population persistence. Our objective is to find distributions of resources that maximize these persistence measures. We begin our study by considering stream networks consisting of three nodes and prove that the strategy to maximize the total biomass is to concentrate all the resources in the most upstream locations. In contrast, when the diffusion rates are sufficiently small, the metapopulation growth rate is maximized when all resources are concentrated in one of the most downstream locations. These two main results are generalized to stream networks with any number of patches.
