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Ecopath with Ecosim food web model for Lake Erie central basin

Ecopath with Ecosim food web model for Lake Erie central basin. Ed Rutherford, Hongyan Zhang, Doran Mason, Aaron Adamack , Xinhua Zhu, Tim Johnson,. Pathways that hypoxia impacts trophic interactions. Epilimnon. Hypolimnon . Hypoxia (dead zone). EwE Food Web for Lake Erie Central Basin.

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Ecopath with Ecosim food web model for Lake Erie central basin

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  1. Ecopath with Ecosim food web model for Lake Erie central basin Ed Rutherford, Hongyan Zhang, Doran Mason, Aaron Adamack, Xinhua Zhu, Tim Johnson,

  2. Pathways that hypoxia impacts trophic interactions Epilimnon Hypolimnon Hypoxia (dead zone)

  3. EwE Food Web for Lake Erie Central Basin

  4. Ecosim Calibration Chironomids Herbivorous cladocerans Rainbow smelt Round goby Yellow perch 2+ Walleye 3+

  5. Hypoxia Impacts

  6. Conclusions and future work • We calibrated and used the Ecopath with Ecosim model to simulate impacts of hypoxia on the food web and fisheries of Lake Erie’s Central Basin from 1994-2005. • Model results suggest hypoxia may: decrease biomass of benthos, their predators (e.g. yellow perch) and piscivores (e.g., walleye) by decoupling trophic interactions; but have minor effects on zooplankton and planktivores (e.g., rainbow smelt). • For our next steps, we will model scenarios of hypoxia impacts on food webs and fisheries harvest under future nutrient loading scenarios, and current and future invasive species.

  7. Potential Impacts Phytoplankton Zooplankton Prey fish Commercial fish

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