Increased anoxia following species invasion of a eutrophic lake
Abstract Species invasions can disrupt aquatic ecosystems by re‐wiring food webs. A trophic cascade triggered by the invasion of the predatory zooplankter spiny water flea (Bythotrephes cederströmii) resulted in increased phytoplankton due to decreased zooplankton grazing. Here, we show that increas...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-02-01
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| Series: | Limnology and Oceanography Letters |
| Online Access: | https://doi.org/10.1002/lol2.10364 |
| _version_ | 1797356234807967744 |
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| author | Robin R. Rohwer Robert Ladwig Paul C. Hanson Jake R. Walsh M. Jake Vander Zanden Hilary A. Dugan |
| author_facet | Robin R. Rohwer Robert Ladwig Paul C. Hanson Jake R. Walsh M. Jake Vander Zanden Hilary A. Dugan |
| author_sort | Robin R. Rohwer |
| collection | DOAJ |
| description | Abstract Species invasions can disrupt aquatic ecosystems by re‐wiring food webs. A trophic cascade triggered by the invasion of the predatory zooplankter spiny water flea (Bythotrephes cederströmii) resulted in increased phytoplankton due to decreased zooplankton grazing. Here, we show that increased phytoplankton biomass led to an increase in lake anoxia. The temporal and spatial extent of anoxia experienced a step change increase coincident with the invasion, and anoxic factor increased by 11 d. Post‐invasion, anoxia established more quickly following spring stratification, driven by an increase in phytoplankton biomass. A shift in spring phytoplankton phenology encompassed both abundance and community composition. Diatoms (Bacillaryophyta) drove the increase in spring phytoplankton biomass, but not all phytoplankton community members increased, shifting the community composition. We infer that increased phytoplankton biomass increased labile organic matter and drove hypolimnetic oxygen consumption. These results demonstrate how a species invasion can shift lake phenology and biogeochemistry. |
| first_indexed | 2024-03-08T14:23:42Z |
| format | Article |
| id | doaj.art-e99f0aaa982e495db6d566c057b7b3dc |
| institution | Directory Open Access Journal |
| issn | 2378-2242 |
| language | English |
| last_indexed | 2024-03-08T14:23:42Z |
| publishDate | 2024-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Limnology and Oceanography Letters |
| spelling | doaj.art-e99f0aaa982e495db6d566c057b7b3dc2024-01-13T13:16:42ZengWileyLimnology and Oceanography Letters2378-22422024-02-0191334210.1002/lol2.10364Increased anoxia following species invasion of a eutrophic lakeRobin R. Rohwer0Robert Ladwig1Paul C. Hanson2Jake R. Walsh3M. Jake Vander Zanden4Hilary A. Dugan5Department of Integrative Biology The University of Texas at Austin Austin Texas USACenter for Limnology University of Wisconsin–Madison Madison Wisconsin USACenter for Limnology University of Wisconsin–Madison Madison Wisconsin USAMinnesota Department of Natural Resources Saint Paul Minnesota USACenter for Limnology University of Wisconsin–Madison Madison Wisconsin USACenter for Limnology University of Wisconsin–Madison Madison Wisconsin USAAbstract Species invasions can disrupt aquatic ecosystems by re‐wiring food webs. A trophic cascade triggered by the invasion of the predatory zooplankter spiny water flea (Bythotrephes cederströmii) resulted in increased phytoplankton due to decreased zooplankton grazing. Here, we show that increased phytoplankton biomass led to an increase in lake anoxia. The temporal and spatial extent of anoxia experienced a step change increase coincident with the invasion, and anoxic factor increased by 11 d. Post‐invasion, anoxia established more quickly following spring stratification, driven by an increase in phytoplankton biomass. A shift in spring phytoplankton phenology encompassed both abundance and community composition. Diatoms (Bacillaryophyta) drove the increase in spring phytoplankton biomass, but not all phytoplankton community members increased, shifting the community composition. We infer that increased phytoplankton biomass increased labile organic matter and drove hypolimnetic oxygen consumption. These results demonstrate how a species invasion can shift lake phenology and biogeochemistry.https://doi.org/10.1002/lol2.10364 |
| spellingShingle | Robin R. Rohwer Robert Ladwig Paul C. Hanson Jake R. Walsh M. Jake Vander Zanden Hilary A. Dugan Increased anoxia following species invasion of a eutrophic lake Limnology and Oceanography Letters |
| title | Increased anoxia following species invasion of a eutrophic lake |
| title_full | Increased anoxia following species invasion of a eutrophic lake |
| title_fullStr | Increased anoxia following species invasion of a eutrophic lake |
| title_full_unstemmed | Increased anoxia following species invasion of a eutrophic lake |
| title_short | Increased anoxia following species invasion of a eutrophic lake |
| title_sort | increased anoxia following species invasion of a eutrophic lake |
| url | https://doi.org/10.1002/lol2.10364 |
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