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

Author

Listed:
  • Shen, Yang
  • Xu, Zhichao
  • Nijs, Ivan
  • Liao, Jinbao

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.

Suggested Citation

  • Shen, Yang & Xu, Zhichao & Nijs, Ivan & Liao, Jinbao, 2018. "Spatial arrangement of size-different patches determines population dynamics in linear riverine systems," Ecological Modelling, Elsevier, vol. 385(C), pages 220-225.
    • Handle: RePEc:eee:ecomod:v:385:y:2018:i:c:p:220-225
    DOI: 10.1016/j.ecolmodel.2018.07.021
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    References listed on IDEAS

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    1. Liao, Jinbao & Li, Zhenqing & Hiebeler, David E. & El-Bana, Magdy & Deckmyn, Gaby & Nijs, Ivan, 2013. "Modelling plant population size and extinction thresholds from habitat loss and habitat fragmentation: Effects of neighbouring competition and dispersal strategy," Ecological Modelling, Elsevier, vol. 268(C), pages 9-17.
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