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

Probert, W. J. M., Drechsler, M., Baxter, P. W. J., & Possingham, H. P. (2011) Resource allocation in two species systems: Is it worth acknowledging species interactions? Ecological Modelling, 222(10), pp. 1781-1789.

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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. © 2011 Elsevier B.V.

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ID Code: 82406
Item Type: Journal Article
Refereed: Yes
Keywords: Competitive exclusion, Conservation funding, Funding allocation, Mutualism, Networks, Predator-prey, Species interactions, Conservation, Decision making, Economics, Ecosystems, Optimization, Resource allocation, Finance, conservation management, ecological economics, endangered species, food web, interspecific interaction, management practice, predator-prey interaction, species conservation, species diversity, survival
DOI: 10.1016/j.ecolmodel.2011.02.026
ISSN: 03043800 (ISSN)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Elsevier
Deposited On: 10 Mar 2015 06:40
Last Modified: 16 Mar 2015 04:57

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