Bulletin of the American Physical Society
APS March Meeting 2010
Volume 55, Number 2
Monday–Friday, March 15–19, 2010; Portland, Oregon
Session B13: Focus Session: Complex Networks I
11:15 AM–2:15 PM,
Monday, March 15, 2010
Sponsoring Unit: GSNP
Chair: Alex Vespignani, Indiana University
Abstract ID: BAPS.2010.MAR.B13.11
Abstract: B13.00011 : Rescuing Ecosystems from Extinction Cascades*
1:39 PM–1:51 PM
Preview Abstract Abstract
Food web perturbations stemming from climate change, overexploitation, invasive species, and natural disasters often cause an initial loss of species that results in a cascade of secondary extinctions. Using a predictive modeling framework, here we will present a systematic network-based approach to reduce the number of secondary extinctions. We will show that the extinction of one species can often be compensated by the concurrent removal of a second specific species, which is a counter-intuitive effect not previously tested in complex food webs. These compensatory perturbations frequently involve long-range interactions that are not a priori evident from local predator-prey relationships. Strikingly, in numerous cases even the early removal of a species that would eventually be extinct by the cascade is found to significantly reduce the number of cascading extinctions. Other nondestructive interventions based on partial removals and growth suppression and/or mortality increase are shown to sometimes prevent all secondary extinctions.
*This work was supported by NSF under Grant No. DMS-0709212.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.B13.11
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