Spatial arrangement of size-different patches determines population dynamics in linear riverine systems

Yang Shen, Zhichao Xu, Ivan Nijs and Jinbao Liao

Ecological Modelling, 2018, vol. 385, issue C, 220-225

Abstract: Despite years of attention, the dynamics of species constrained to disperse within riverine systems are not well captured by existing population models. Here we develop a population model subject to local population dynamics and regional dispersal process in a closed linear riverine system, which consists of three size-different patches (lakes) arranged at different positions in the chain. Generally, two-way dispersal, including down- and upstream, promotes global population density relative to one-way dispersal, but such dispersal superiority is weakened with increasing species relative mortality rate. Furthermore, unbiased dispersal (i.e., balanced down- and upstream) maximizes population viability in this closed linear system. Finally, which type of spatial arrangement of size-different patches is an optimal strategy for species persistence depends on both species inter-patch dispersal and local population dynamics, reflecting the balance between local demographic and regional dispersal processes.

Keywords: Linear riverine systems; Downstream dispersal; Upstream dispersal; Patch arrangement; Species persistence (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:385:y:2018:i:c:p:220-225

DOI: 10.1016/j.ecolmodel.2018.07.021

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