Grazing Impacts of Rotifer Zooplankton on a Cyanobacteria Bloom in a Large, Shallow Temperate Lake (Vancouver Lake, WA, USA) ...
Zooplankton grazers’ consumption of phytoplankton can often influence and control phytoplankton community dynamics, including those affected by harmful cyanobacteria blooms. While the trophic roles of copepods and some microzooplankton on cyanobacteria have been investigated, much less is known abou...
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| Format: | Text |
| Language: | English |
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Washington State University
2024
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| Online Access: | https://dx.doi.org/10.7273/000005526 https://rex.libraries.wsu.edu/esploro/outputs/graduate/99901052140201842 |
| Summary: | Zooplankton grazers’ consumption of phytoplankton can often influence and control phytoplankton community dynamics, including those affected by harmful cyanobacteria blooms. While the trophic roles of copepods and some microzooplankton on cyanobacteria have been investigated, much less is known about the influence of rotifer grazing. Therefore, experiments with field-collected rotifers grazing upon a natural microplankton prey community were performed from July through October 2019, utilizing water and organisms from Vancouver Lake, a large shallow lake in western Washington State (USA) annually affected by severe cyanobacteria blooms. Results show that rotifers directly ingested cyanobacteria at rates significantly higher than for other prey categories each month, yet usually preferred dinoflagellates. Rotifers also had an substantial grazing impact (%) on dinoflagellates and ciliates after the bloom in September and October, indicating that rotifers’ consumption of cyanobacteria is not enough to control ... |
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