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Coexistence outcomes often depend on the complex interplay of species interactions. Consequently in some cases, the extinction of one species can trigger the loss of another, a process known as secondary extinction, as explained by a plaque I came across at the Bronx Zoo. (2/X)

Joe Brennan

2 окт., 20:51

We apply recently-developed techniques from dynamical systems theory and modern coexistence theory to identify (1) WHEN and WHY secondary extinctions occur. We demonstrate that invasion growth rates (per capita growth rates of species when rare) can achieve these goals! (3/X)

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Joe Brennan

2 окт., 20:55

We use invasion growth rates to develop the "Community Disassembly Graph". Nodes represent coexisting communities and directed edges represent transitions from one community composition to another due to extinction. We can use this graph to identify possible secondary extinctions. (4/X)

Ответ для Joe Brennan

Joe Brennan

2 окт., 21:00

Once we identify when a secondary extinction occurs, we can understand why by asking (1) why the secondarily extinct species has a negative invasion growth rate at the disassembled community but (2) a positive invasion growth rate in a community containing the primarily extinct species (5/X)