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Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River
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| Zeitschriftentitel: | Canadian Journal of Fisheries and Aquatic Sciences |
|---|---|
| Personen und Körperschaften: | , |
| In: | Canadian Journal of Fisheries and Aquatic Sciences, 69, 2012, 3, S. 469-486 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Canadian Science Publishing
|
| Schlagwörter: |
| author_facet |
Kipp, Rebekah Ricciardi, Anthony Kipp, Rebekah Ricciardi, Anthony |
|---|---|
| author |
Kipp, Rebekah Ricciardi, Anthony |
| spellingShingle |
Kipp, Rebekah Ricciardi, Anthony Canadian Journal of Fisheries and Aquatic Sciences Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River Aquatic Science Ecology, Evolution, Behavior and Systematics |
| author_sort |
kipp, rebekah |
| spelling |
Kipp, Rebekah Ricciardi, Anthony 0706-652X 1205-7533 Canadian Science Publishing Aquatic Science Ecology, Evolution, Behavior and Systematics http://dx.doi.org/10.1139/f2011-139 <jats:p> An invasive benthivorous fish, the Eurasian round goby ( Neogobius melanostomus ) is abundant throughout the lower Great Lakes – St. Lawrence River system. We examined the round goby’s potential to alter benthic communities on cobble substrates in the upper St. Lawrence River. During the summers of 2008 and 2009, macroinvertebrates and benthic algae were sampled across sites with varying goby densities. Archived data from various sites in 2004–2006 (prior to invasion) were available for comparison. Macroinvertebrate community composition varied significantly among samples grouped into categories based on goby density and time since invasion. Macroinvertebrate diversity and dominance by large-bodied taxa declined with increasing goby density. Surprisingly, dreissenid biomass did not vary consistently with goby density, in contrast to studies in the Great Lakes. The biomass of all non-dreissenid taxa was negatively correlated with increasing goby density across sites and over time at three of four sites. Negative effects were most pronounced on the biomass of gastropods. Benthic algal biomass increased with goby density across sites, suggesting a trophic cascade driven by the impacts of gobies on gastropods and other algivores. Our study highlights the potential ecosystem impacts of an expanding goby population in a large river. </jats:p> Impacts of the Eurasian round goby (<i>Neogobius melanostomus</i>) on benthic communities in the upper St. Lawrence River Canadian Journal of Fisheries and Aquatic Sciences |
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| title |
Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_unstemmed |
Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_full |
Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_fullStr |
Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_full_unstemmed |
Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_short |
Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_sort |
impacts of the eurasian round goby (<i>neogobius melanostomus</i>) on benthic communities in the upper st. lawrence river |
| topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
| url |
http://dx.doi.org/10.1139/f2011-139 |
| publishDate |
2012 |
| physical |
469-486 |
| description |
<jats:p> An invasive benthivorous fish, the Eurasian round goby ( Neogobius melanostomus ) is abundant throughout the lower Great Lakes – St. Lawrence River system. We examined the round goby’s potential to alter benthic communities on cobble substrates in the upper St. Lawrence River. During the summers of 2008 and 2009, macroinvertebrates and benthic algae were sampled across sites with varying goby densities. Archived data from various sites in 2004–2006 (prior to invasion) were available for comparison. Macroinvertebrate community composition varied significantly among samples grouped into categories based on goby density and time since invasion. Macroinvertebrate diversity and dominance by large-bodied taxa declined with increasing goby density. Surprisingly, dreissenid biomass did not vary consistently with goby density, in contrast to studies in the Great Lakes. The biomass of all non-dreissenid taxa was negatively correlated with increasing goby density across sites and over time at three of four sites. Negative effects were most pronounced on the biomass of gastropods. Benthic algal biomass increased with goby density across sites, suggesting a trophic cascade driven by the impacts of gobies on gastropods and other algivores. Our study highlights the potential ecosystem impacts of an expanding goby population in a large river. </jats:p> |
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| description | <jats:p> An invasive benthivorous fish, the Eurasian round goby ( Neogobius melanostomus ) is abundant throughout the lower Great Lakes – St. Lawrence River system. We examined the round goby’s potential to alter benthic communities on cobble substrates in the upper St. Lawrence River. During the summers of 2008 and 2009, macroinvertebrates and benthic algae were sampled across sites with varying goby densities. Archived data from various sites in 2004–2006 (prior to invasion) were available for comparison. Macroinvertebrate community composition varied significantly among samples grouped into categories based on goby density and time since invasion. Macroinvertebrate diversity and dominance by large-bodied taxa declined with increasing goby density. Surprisingly, dreissenid biomass did not vary consistently with goby density, in contrast to studies in the Great Lakes. The biomass of all non-dreissenid taxa was negatively correlated with increasing goby density across sites and over time at three of four sites. Negative effects were most pronounced on the biomass of gastropods. Benthic algal biomass increased with goby density across sites, suggesting a trophic cascade driven by the impacts of gobies on gastropods and other algivores. Our study highlights the potential ecosystem impacts of an expanding goby population in a large river. </jats:p> |
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| spelling | Kipp, Rebekah Ricciardi, Anthony 0706-652X 1205-7533 Canadian Science Publishing Aquatic Science Ecology, Evolution, Behavior and Systematics http://dx.doi.org/10.1139/f2011-139 <jats:p> An invasive benthivorous fish, the Eurasian round goby ( Neogobius melanostomus ) is abundant throughout the lower Great Lakes – St. Lawrence River system. We examined the round goby’s potential to alter benthic communities on cobble substrates in the upper St. Lawrence River. During the summers of 2008 and 2009, macroinvertebrates and benthic algae were sampled across sites with varying goby densities. Archived data from various sites in 2004–2006 (prior to invasion) were available for comparison. Macroinvertebrate community composition varied significantly among samples grouped into categories based on goby density and time since invasion. Macroinvertebrate diversity and dominance by large-bodied taxa declined with increasing goby density. Surprisingly, dreissenid biomass did not vary consistently with goby density, in contrast to studies in the Great Lakes. The biomass of all non-dreissenid taxa was negatively correlated with increasing goby density across sites and over time at three of four sites. Negative effects were most pronounced on the biomass of gastropods. Benthic algal biomass increased with goby density across sites, suggesting a trophic cascade driven by the impacts of gobies on gastropods and other algivores. Our study highlights the potential ecosystem impacts of an expanding goby population in a large river. </jats:p> Impacts of the Eurasian round goby (<i>Neogobius melanostomus</i>) on benthic communities in the upper St. Lawrence River Canadian Journal of Fisheries and Aquatic Sciences |
| spellingShingle | Kipp, Rebekah, Ricciardi, Anthony, Canadian Journal of Fisheries and Aquatic Sciences, Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River, Aquatic Science, Ecology, Evolution, Behavior and Systematics |
| title | Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_full | Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_fullStr | Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_full_unstemmed | Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_short | Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| title_sort | impacts of the eurasian round goby (<i>neogobius melanostomus</i>) on benthic communities in the upper st. lawrence river |
| title_unstemmed | Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River |
| topic | Aquatic Science, Ecology, Evolution, Behavior and Systematics |
| url | http://dx.doi.org/10.1139/f2011-139 |