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Representing mediating effects and species reintroductions in Ecopath with Ecosim

Author

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  • Espinosa-Romero, Maria J.
  • Gregr, Edward J.
  • Walters, Carl
  • Christensen, Villy
  • Chan, Kai M.A.

Abstract

Ecosystem models play an important role in supporting ecosystem approaches to management. To improve the representation of how ecosystems work, ecosystem models should be able to represent mediating effects (e.g., habitat provision) that species provide to each other as well as species (re)introductions, both common situations that can strongly influence ecosystem dynamics. We examine how such processes can be incorporated into Ecopath with Ecosim (EwE), a widely used tool for represent aquatic ecosystems with the potential to support ecosystem-based management. We used the reintroduction of sea otters (Enhydralutris) to the west coast of Vancouver Island, British Columbia, Canada as a case study. The model demonstrates how to account for benefits provided by kelp forests by contributing to primary production, increased feeding areas and food availability through prey retention. It also demonstrates how the reintroduction and range expansion of sea otters can be represented in Ecospace, and the implications of these options.

Suggested Citation

  • Espinosa-Romero, Maria J. & Gregr, Edward J. & Walters, Carl & Christensen, Villy & Chan, Kai M.A., 2011. "Representing mediating effects and species reintroductions in Ecopath with Ecosim," Ecological Modelling, Elsevier, vol. 222(9), pages 1569-1579.
    • Handle: RePEc:eee:ecomod:v:222:y:2011:i:9:p:1569-1579
    DOI: 10.1016/j.ecolmodel.2011.02.008
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    Cited by:

    1. Sadchatheeswaran, Saachi & Branch, George M & Shannon, Lynne J & Moloney, Coleen L & Coll, Marta & Robinson, Tamara B, 2020. "Modelling changes in trophic and structural impacts of alien ecosystem engineers on a rocky-shore island," Ecological Modelling, Elsevier, vol. 433(C).
    2. Sadchatheeswaran, Saachi & Branch, George M. & Shannon, Lynne J. & Coll, Marta & Steenbeek, Jeroen, 2021. "A novel approach to explicitly model the spatiotemporal impacts of structural complexity created by alien ecosystem engineers in a marine benthic environment," Ecological Modelling, Elsevier, vol. 459(C).
    3. Han, Jeong-Ho & Kumar, Hema K. & Lee, Jae Hoon & Zhang, Chang-Ik & Kim, Se-Wha & Lee, Jung-Ho & Kim, Sang Don & An, Kwang-Guk, 2011. "Integrative trophic network assessments of a lentic ecosystem by key ecological approaches of water chemistry, trophic guilds, and ecosystem health assessments along with an ECOPATH model," Ecological Modelling, Elsevier, vol. 222(19), pages 3457-3472.
    4. Langseth, Brian J. & Rogers, Mark & Zhang, Hongyan, 2012. "Modeling species invasions in Ecopath with Ecosim: An evaluation using Laurentian Great Lakes models," Ecological Modelling, Elsevier, vol. 247(C), pages 251-261.
    5. Romagnoni, Giovanni & Mackinson, Steven & Hong, Jiang & Eikeset, Anne Maria, 2015. "The Ecospace model applied to the North Sea: Evaluating spatial predictions with fish biomass and fishing effort data," Ecological Modelling, Elsevier, vol. 300(C), pages 50-60.
    6. Hoover, Carie & Pitcher, Tony & Christensen, Villy, 2013. "Effects of hunting, fishing and climate change on the Hudson Bay marine ecosystem: I. Re-creating past changes 1970–2009," Ecological Modelling, Elsevier, vol. 264(C), pages 130-142.

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