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Resource allocation in two species systems : is it worth acknowledging species interactions?
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Probert, William J. M. , Drechsler, Martin, Baxter, Peter W. J. and Possingham, Hugh P. (2011) Resource allocation in two species systems : is it worth acknowledging species interactions? Ecological Modelling, 222 (10). pp. 1781-1789. doi:10.1016/j.ecolmodel.2011.02.026
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Official URL: http://dx.doi.org/10.1016/j.ecolmodel.2011.02.026
Abstract
It is becoming increasingly popular to consider species interactions when managing ecological foodwebs. Such an approach is useful in determining how management can affect multiple species, with either beneficial or detrimental consequences. Identifying such actions is particularly valuable in the context of conservation decision making as funding is severely limited. This paper outlines a new approach that simplifies the resource allocation problem in a two species system for a range of species interactions: independent, mutualism, predator–prey, and competitive exclusion. We assume that both species are endangered and we do not account for decisions over time. We find that optimal funding allocation is to the conservation of the species with the highest marginal gain in expected probability of survival and that, across all except mutualist interaction types, optimal conservation funding allocation differs between species. Loss in efficiency from ignoring species interactions was most severe in predator–prey systems. The funding problem we address, where an ecosystem includes multiple threatened species, will only become more commonplace as increasing numbers of species worldwide become threatened.
| Item Type: | Journal Article | ||||||||
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| Divisions: | Faculty of Science > Life Sciences (2010- ) Faculty of Science > Mathematics |
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| Journal or Publication Title: | Ecological Modelling | ||||||||
| Publisher: | Elsevier BV | ||||||||
| ISSN: | 0304-3800 | ||||||||
| Official Date: | 30 March 2011 | ||||||||
| Dates: |
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| Volume: | 222 | ||||||||
| Number: | 10 | ||||||||
| Page Range: | pp. 1781-1789 | ||||||||
| DOI: | 10.1016/j.ecolmodel.2011.02.026 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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