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| Roy, Eric D.; Department of Food, Agricultural and Biological Engineering, Ohio State University; eroy5@tigers.lsu.edu; Martin, Jay F.; Department of Food, Agricultural and Biological Engineering, Ohio State University; martin.1130@osu.edu; Irwin, Elena G.; Department of Agricultural, Environmental and Development Economics, Ohio State University; irwin.78@osu.edu; Conroy, Joseph D.; Department of Evolution, Ecology and Organismal Biology, Ohio State University; conroy.27@osu.edu; Culver, David A.; Department of Evolution, Ecology and Organismal Biology, Ohio State University; culver.3@osu.edu. |
| Together, lake ecosystems and local human activity form complex social–ecological systems (SESs) characterized by feedback loops and discontinuous change. Researchers in diverse fields have suggested that complex systems do not have single stable equilibria in the long term because of inevitable perturbation. During this study, we sought to address the general question of whether or not stable social–ecological equilibria exist in highly stressed and managed lacustrine systems. Using an integrated human–biophysical model, we investigated the impacts of a species invasion and ecosystem restoration on SES equilibrium, defined here as a compromise in phosphorus management among opposing stakeholders, in western Lake Erie. Our... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Dreissena; Ecosystem services; Invasive species; Lake Erie; Lake eutrophication; Lake management; Perturbation; Phosphorus. |
| Ano: 2010 |
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| Singh, Riddhi; Department of Civil Engineering, Indian Institute of Technology Hyderabad; Earth and Environmental Systems Institute, Pennsylvania State University; riddhi@iith.ac.in; Reed, Patrick M.; School of Civil and Environmental Engineering, Cornell University; patrick.reed@cornell.edu; Keller, Klaus; Department of Geosciences, Pennsylvania State University; Earth and Environmental Systems Institute, Pennsylvania State University; Department of Engineering and Public Policy, Carnegie Mellon University; klaus@psu.edu. |
| Managing ecosystems with deeply uncertain threshold responses and multiple decision makers poses nontrivial decision analytical challenges. The problem is imbued with deep uncertainties because decision makers do not know or cannot converge on a single probability density function for each key parameter, a perfect model structure, or a single adequate objective. The existing literature on managing multistate ecosystems has generally followed a normative decision-making approach based on expected utility maximization (MEU). This approach has simple and intuitive axiomatic foundations, but faces at least two limitations. First, a prespecified utility function is often unable to capture the preferences of diverse decision makers. Second, decision... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: A posteriori decision making; Deep uncertainty; Lake eutrophication; Many objective; Robustness analysis; Utility. |
| Ano: 2015 |
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| Carpenter, Stephen R; University of Wisconsin-Madison; srcarpen@wisc.edu; Brock, William; University of Wisconsin; brock@macc.wisc.edu; Hanson, Paul; University of Wisconsin; pchanson@facstaff.wisc.edu. |
| Simulation models were developed to explore and illustrate dynamics of socioecological systems. The ecosystem is a lake subject to phosphorus pollution. Phosphorus flows from agriculture to upland soils, to surface waters, where it cycles between water and sediments. The ecosystem is multistable, and moves among domains of attraction depending on the history of pollutant inputs. The alternative states yield different economic benefits. Agents form expectations about ecosystem dynamics, markets, and/or the actions of managers, and choose levels of pollutant inputs accordingly. Agents have heterogeneous beliefs and/or access to information. Their aggregate behavior determines the total rate of pollutant input. As the ecosystem changes, agents update their... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Adaptive agent models; Adaptive management; Bounded rationality; Ecological economics; Ecosystem oscillations; Integrated models; Lake eutrophication; Nonpoint pollution; Phosphorus cycles; Simulation models; Social-natural systems.. |
| Ano: 1999 |
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