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The influence of water quality variables on cyanobacterial blooms and phytoplankton community composition in a shallow temperate lake

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Abstract

Cyanobacterial blooms and their detrimental effects on water quality have become a worldwide problem. Vancouver Lake, a tidally influenced shallow temperate freshwater lake in Washington state, U.S.A., exhibits annual summer cyanobacterial blooms that are of concern to local resource managers. Our objectives were to describe changes in phytoplankton community composition in Vancouver Lake over seasonal, annual, and interannual time scales, and to identify strong water quality predictors of phytoplankton community structure, with an emphasis on cyanobacterial blooms, from 2007 through 2010. Cluster analysis, indicator species analysis, and non-metric multidimensional scaling were used to identify significantly different phytoplankton community groupings and to determine which environmental factors influenced community changes. From 2007 through 2009, depletion of NO3–N followed by elevated PO4–P concentration was associated with increased biomass and duration of each cyanobacterial bloom. Time-lag analysis suggested that NO3–N availability contributed to interannual changes within the summer phytoplankton community. Specifically, in summer 2010, a distinct cyanobacteria community was not present, potentially due to increased NO3–N and decreased PO4–P and NH4–N availability. Our study provides a comprehensive assessment of species-level responses to water quality variables in a shallow non-stratifying temperate lake, contributes to a better understanding of phytoplankton dynamics, and may aid in predicting and managing cyanobacterial blooms.

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Acknowledgments

We thank M. McDonald, A. Gonzalez, and J. Zimmerman for help with sampling and data collection, and the Vancouver Lake Sailing Club for lake access. This research was partially supported by grant no. 06HQGR0126 from the United States Geological Survey (USGS) to G.R.B. and S.M.B., through the State of Washington Water Research Center. Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the USGS. Additional support came from the Vancouver Lake Watershed Partnership and NSF ULTRA-EX grant 09–48983 to S.M.B. and G.R.B. The lead author also received additional funding from the Robert Lane Fellowship in Environmental Science through Washington State University, and a GK-12 Fellowship from the National Science Foundation STEM Fellows in K-12 Education grant (DGE 07–42561) awarded to G.R.B. and S.M.B.

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  1. School of the Environment, Washington State University, 14204 NE Salmon Creek Avenue, Vancouver, WA, 98686, USA

    Tammy A. Lee, Gretchen Rollwagen-Bollens & Stephen M. Bollens

  2. School of Biological Sciences, Washington State University, 14204 NE Salmon Creek Avenue, Vancouver, WA, 98686, USA

    Gretchen Rollwagen-Bollens & Stephen M. Bollens

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  1. Tammy A. Lee
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Lee, T.A., Rollwagen-Bollens, G. & Bollens, S.M. The influence of water quality variables on cyanobacterial blooms and phytoplankton community composition in a shallow temperate lake. Environ Monit Assess 187, 315 (2015). https://doi.org/10.1007/s10661-015-4550-2

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