Throughflow centrality reveals important species in ecosystems and environmental impacts of shrimp trawling in Core Sound, NC.

Stuart Borrett, UNC, Wilmington - Systems Ecology and Ecoinformatics Laboratory
Centrality is a common tool for characterizing node importance in network science, but it is rarely used in ecology. Here, I introduce throughflow centrality as a global indicator of node importance for the energy-matter flow dynamics ON networks. I then present two ecological applications. First, I characterize the distribution of throughflow centrality in 45 empirically-based trophic ecosystem models. Consistent with theoretical expectations, this analysis shows that a small fraction of the system components (80%). Second, I use throughflow centrality to characterize the ecosystem impacts of shrimp trawling in Core Sound, NC. This highlights the wide ranging impacts of the fishing activity, not all of which are negative.
February, 26 2013 | 12:30 - 2:00 | 329 Soc/Psych Building (McKinney Room)

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