Biodiversity and Optimal Multi-species Ecosystem Management

Bertram, Christine and Quaas, Martin (2016) Biodiversity and Optimal Multi-species Ecosystem Management Environmental and Resource Economics . pp. 1-30. DOI 10.1007/s10640-015-9988-8.

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Abstract

We analyze optimal multi-species management in a dynamic bio-economic model taking into account both harvesting profit and biodiversity value. Within an analytical model, we show that extinction is never optimal when a global biodiversity value is taken into account. Moreover, a stronger preference for species diversity leads to a more even distribution of stock sizes in the optimal steady state, and a higher value of biodiversity increases steady state stock sizes for all species when species are ecologically independent or symbiotic. For a predator–prey ecosystem, the effects may be positive or negative depending on relative prices and the strength of species interaction. The analytical results are illustrated and extended using an age-structured three-species predator–prey model for the Baltic cod, sprat, and herring fisheries. In this quantitative application, we find that using stock biomass or stock numbers as abundance indicators in the biodiversity index may lead to opposite results.

Document Type: Article
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R03
OceanRep > The Future Ocean - Cluster of Excellence > FO-R02
Kiel University > Kiel Marine Science
Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
UNSPECIFIED
OceanRep > The Future Ocean - Cluster of Excellence > FO-R01
Refereed: Yes
DOI etc.: 10.1007/s10640-015-9988-8
ISSN: 1573-1502
Projects: Future Ocean
Date Deposited: 30 Jan 2017 10:20
Last Modified: 22 Mar 2017 14:19
URI: http://eprints.uni-kiel.de/id/eprint/35519

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