Homogenization of freshwater lakes: Recent compositional shifts in fish communities are explained by gamefish movement and not climate change. Cazelles, K., Bartley, T., Guzzo, M. M., Brice, M., MacDougall, A. S., Bennett, J. R., Esch, E. H., Kadoya, T., Kelly, J., Matsuzaki, S., Nilsson, K. A., & McCann, K. S. Global Change Biology, 25(12):4222–4233, 2019. _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14829![Homogenization of freshwater lakes: Recent compositional shifts in fish communities are explained by gamefish movement and not climate change [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Globally, lake fish communities are being subjected to a range of scale-dependent anthropogenic pressures, from climate change to eutrophication, and from overexploitation to species introductions. As a consequence, the composition of these communities is being reshuffled, in most cases leading to a surge in taxonomic similarity at the regional scale termed homogenization. The drivers of homogenization remain unclear, which may be a reflection of interactions between various environmental changes. In this study, we investigate two potential drivers of the recent changes in the composition of freshwater fish communities: recreational fishing and climate change. Our results, derived from 524 lakes of Ontario, Canada sampled in two periods (1965–1982 and 2008–2012), demonstrate that the main contributors to homogenization are the dispersal of gamefish species, most of which are large predators. Alternative explanations relating to lake habitat (e.g., area, phosphorus) or variations in climate have limited explanatory power. Our analysis suggests that human-assisted migration is the primary driver of the observed compositional shifts, homogenizing freshwater fish community among Ontario lakes and generating food webs dominated by gamefish species.
@article{cazelles_homogenization_2019,
title = {Homogenization of freshwater lakes: {Recent} compositional shifts in fish communities are explained by gamefish movement and not climate change},
volume = {25},
copyright = {© 2019 John Wiley \& Sons Ltd},
issn = {1365-2486},
shorttitle = {Homogenization of freshwater lakes},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.14829},
doi = {10.1111/gcb.14829},
abstract = {Globally, lake fish communities are being subjected to a range of scale-dependent anthropogenic pressures, from climate change to eutrophication, and from overexploitation to species introductions. As a consequence, the composition of these communities is being reshuffled, in most cases leading to a surge in taxonomic similarity at the regional scale termed homogenization. The drivers of homogenization remain unclear, which may be a reflection of interactions between various environmental changes. In this study, we investigate two potential drivers of the recent changes in the composition of freshwater fish communities: recreational fishing and climate change. Our results, derived from 524 lakes of Ontario, Canada sampled in two periods (1965–1982 and 2008–2012), demonstrate that the main contributors to homogenization are the dispersal of gamefish species, most of which are large predators. Alternative explanations relating to lake habitat (e.g., area, phosphorus) or variations in climate have limited explanatory power. Our analysis suggests that human-assisted migration is the primary driver of the observed compositional shifts, homogenizing freshwater fish community among Ontario lakes and generating food webs dominated by gamefish species.},
language = {en},
number = {12},
urldate = {2020-04-23},
journal = {Global Change Biology},
author = {Cazelles, Kevin and Bartley, Timothy and Guzzo, Matthew M. and Brice, Marie-Hélène and MacDougall, Andrew S. and Bennett, Joseph R. and Esch, Ellen H. and Kadoya, Taku and Kelly, Jocelyn and Matsuzaki, Shin-ichiro and Nilsson, Karin A. and McCann, Kevin S.},
year = {2019},
note = {\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14829},
keywords = {\#nosource, Ontario, angling pressure, climate change, compositional shift, fresh lake fish communities, homogenization, predatory fish},
pages = {4222--4233},
}
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In this study, we investigate two potential drivers of the recent changes in the composition of freshwater fish communities: recreational fishing and climate change. Our results, derived from 524 lakes of Ontario, Canada sampled in two periods (1965–1982 and 2008–2012), demonstrate that the main contributors to homogenization are the dispersal of gamefish species, most of which are large predators. Alternative explanations relating to lake habitat (e.g., area, phosphorus) or variations in climate have limited explanatory power. 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