2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/27/2021 | 2:00 PM - 3:30 PM | INFLUENCE OF LAKE SEEDBANK ON PHYTOPLANKTON POPULATIONS AND THEIR SPATIAL DISTRIBUTION IN AN ARID FLOODPLAIN SYSTEM | Virtual Platform
INFLUENCE OF LAKE SEEDBANK ON PHYTOPLANKTON POPULATIONS AND THEIR SPATIAL DISTRIBUTION IN AN ARID FLOODPLAIN SYSTEM
Understanding the origin of phytoplankton is essential for the management practices, especially in restored water bodies. A wetland’s post-flood phytoplankton community is partially reliant on the germination of resting stages previously deposited in the lake sediment during the drying phase. We examined the seed bank phytoplankton species richness of four lakes in the arid Hattah Lakes floodplain system, Victoria, Australia, to assess seed bank functionality. The results showed that although germination of the species is not synchronous, each lake’s dominant species germinated by the second week under inundation. Two of the connected lakes share common species compared to the disconnected lake, suggesting an effect of the cascade filling pattern of the system. However, a surprisingly distinct species assemblage was observed in the other connected lake. Overall, there are statistically significant differences in species richness within and between lakes, indicating spatial heterogeneity of phytoplankton species at multiple scales. These findings emphasize the importance of assessing the representativeness of any samples taken during phytoplankton control programs.
- Ecosystem
- Flow regime
- Management
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Presenters/Authors
Sewwandi Wijesuriya
(), Department of Infrastructure Engineering, University of Melbourne, Victoria, Australia, mwijesuriya@student.unimelb.edu.au;
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Angus Webb
(), The University of Melbourne, angus.webb@unimelb.edu.au;
Dr Angus Webb is a Senior Lecturer in Environmental Hydrology and Water Resources at the University of Melbourne, Australia. He originally trained as a marine ecologist before moving into the study and restoration of large-scale environmental problems in freshwater systems. Much of his research centers on improving the use of the existing knowledge and data for such problems. To this end he has developed innovative approaches to synthesizing information from the literature, eliciting knowledge from experts, and analyzing large-scale data sets. He is heavily involved in the monitoring and evaluation of ecological outcomes from the Murray-Darling Basin Plan environmental watering, leading the program for the Goulburn River, Victoria, and advising on data analysis at the basin scale. Angus is currently a co-editing a major new text book on environmental flows science and management. He was awarded the 2013 prize for Building Knowledge in Waterway Management by the River Basin Management Society, and the 2012 Australian Society for Limnology Early Career Achievement Award.
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Michael Stewardson
(), University of Melbourne, mjstew@unimelb.edu.au;
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