Ocean acidification may aggravate social-ecological trade-offs in coastal fisheries

PloS One
Rudi VossUte Kapaun

Abstract

Ocean Acidification (OA) will influence marine ecosystems by changing species abundance and composition. Major effects are described for calcifying organisms, which are significantly impacted by decreasing pH values. Direct effects on commercially important fish are less well studied. The early life stages of fish populations often lack internal regulatory mechanisms to withstand the effects of abnormal pH. Negative effects can be expected on growth, survival, and recruitment success. Here we study Norwegian coastal cod, one of the few stocks where such a negative effect was experimentally quantified, and develop a framework for coupling experimental data on OA effects to ecological-economic fisheries models. In this paper, we scale the observed physiological responses to the population level by using the experimentally determined mortality rates as part of the stock-recruitment relationship. We then use an ecological-economic optimization model, to explore the potential effect of rising CO2 concentration on ecological (stock size), economic (profits), consumer-related (harvest) and social (employment) indicators, with scenarios ranging from present day conditions up to extreme acidification. Under the assumptions of our model,...Continue Reading

References

Sep 26, 2003·Nature·Ken Caldeira, Michael E Wickett
Dec 15, 2007·Science·O Hoegh-GuldbergM E Hatziolos
Mar 27, 2013·Proceedings of the National Academy of Sciences of the United States of America·Benjamin S HalpernHugh P Possingham
May 17, 2013·Nature·William W L CheungDaniel Pauly

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