Volume 33, Issue 1 e12245
APPLICATION ARTICLE
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The effect of anthropogenic and environmental factors in coupled human-natural systems: Evidence from Lake Zürich

Michele Baggio

Corresponding Author

Michele Baggio

Department of Economics, University of Connecticut, Storrs, Connecticut

Research affiliate, Joint Chair of Energy Policy and Economics (CEPE), ETH Zürich, Switzerland

Correspondence Michele Baggio, Department of Economics, University of Connecticut, 365 Fairfield Way, Storrs, CT 06269-1063.

Email: michele.baggio@uconn.edu

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Jean-Paul Chavas

Jean-Paul Chavas

Department of Agricultural & Applied Economics, University of Wisconsin, Madison, Wisconsin

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Salvatore Di Falco

Salvatore Di Falco

Institute of Economics and Econometrics, University of Geneva, Geneva, Switzerland

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Andreas Hertig

Andreas Hertig

Volkswirtschaftsdirektion des Kantons, Amt für Landwirtschaft und Natur, Fischereiinspektorat, Bern, Switzerland

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Francesco Pomati

Francesco Pomati

Department of Aquatic Ecology, Eawag, Dübendorf, Switzerland

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First published: 23 October 2019
Citations: 5

[Correction added on 1 November 2019, after first online publication: the affiliation of the first author is corrected]

Abstract

Exploiting a rich data set including both individual fishing activities and ecology, we study how eutrophication and climate warming influence plankton biodiversity in Lake Zürich and the consequent effects on fishers’ behavior and fishery yield. Our analysis indicates that changes in the fishery of Lake Zürich were driven by complex dynamic interactions between fishing efforts, environmental conditions, and lake ecosystem ecology. Results show that nutrient levels and climate warming have both direct and indirect dynamic and nonlinear effects on both fishers’ behavior and lake productivity. Ecological factors such as plankton abundance and diversity affect the dynamics of the fish population, which, in turn, influences fishing effort. The analysis highlights the importance and the interdependence of ecological-human linkages in aquatic ecosystems.

Recommendations for Resource Managers

  • This model estimates and simulates the effects of temperature and nutrients on the ecology and the management of a commercial lake fishery.

  • Natural and anthropogenic factors have both direct and indirect effects on fishing intensity and the dynamics of lake productivity.

  • In the long term, increasing phosphorus has negative impacts on the plankton of the lake; higher nitrogen has a positive impact on zoo-abundance, but a negative impact on zoo-richness; higher temperatures have positive effects on phytoplankton.

  • Considerable heterogeneity exists in both in lake ecology at different habitats (top vs. bottom of the lake) and behavioral response (pelagic nets vs. demersal nets) to environmental fluctuations.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.