Resource allocation in two species systems: Is it worth acknowledging species interactions?

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: 1781-1789. doi:10.1016/j.ecolmodel.2011.02.026


Author Probert, William J. M.
Drechsler, Martin
Baxter, Peter W. J.
Possingham, Hugh P.
Title Resource allocation in two species systems: Is it worth acknowledging species interactions?
Journal name Ecological Modelling   Check publisher's open access policy
ISSN 0304-3800
1872-7026
Publication date 2011-05-24
Sub-type Article (original research)
DOI 10.1016/j.ecolmodel.2011.02.026
Open Access Status Not Open Access
Volume 222
Issue 10
Start page 1781
End page 1789
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
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.
Keyword Species interactions
Funding allocation
Conservation funding
Predator–prey
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2012 Collection
School of Biological Sciences Publications
 
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Created: Sat, 03 Sep 2011, 02:11:03 EST by Gail Walter on behalf of School of Biological Sciences