ABERNETHY, Gavin, MCCARTNEY, Mark and GLASS, David H (2019). The role of migration in a spatial extension of the Webworld eco-evolutionary model. Ecological Modelling, 397.
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23570:521926
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webworld_spatial_paper_ecol_model_REV4.pdf - Accepted Version
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webworld_spatial_paper_ecol_model_REV4.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.
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Abstract
We extend an eco-evolutionary food web model to a spatially-explicit metacommunity model which features migration
of populations between multiple local sites on the same time-scale as feeding and reproduction. We study how factors
including the implementation and rate of dispersal, properties of the local environments, and the spatial topology of the
metacommunity interact to determine the local and global diversity and the degree of synchronisation between local food
webs. We investigate the influence of migration on the stability of local networks to perturbation, and simulate a 5 x 5 spatial arrangement of cells, demonstrating that combining adaptive migration and heterogeneous habitats allows distinct
food webs to coevolve from the beginning of the simulation. When coupling food webs by diffusion migration after an
initial period of isolation, the Webworld model can construct metacommunities of distinct food webs if the local sites have
spatially-homogeneous environmental parameters. If the sites have heterogeneous parameters, synchronisation between
food webs increases greatly, but this can be o�set by a greater number of sites and less-connected spatial topologies.
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