Determining the effects of network connectivity on biodiversity patterns in macroinvertebrate metacommunities

Tornero et al. (submitted)

We tested the role of network centrality metrics (‘degree’, ‘betweenness’ and ‘closeness’) and environmental characteristics in the biodiversity patterns of pond macroinvertebrate metacommunities (four pond networks) at local and regional scales. Different centrality metrics capturing connectivity at different spatial scales affect pond biodiversity values. Overall, regional biodiversity metrics show similar patterns in all of the networks studied mainly in response to connectivity, whereas local biodiversity metrics show less general but more network-dependent patterns, responding the latest mostly to environmental characteristics. Thus, the degree of connectance of a node in a network with no directional connectivity affects biodiversity.