Long-term phytoplankton trends and related water quality trends in the lower Chesapeake Bay,Virginia, USA |
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Authors: | Marshall Harold G Lane Michael F Nesius Kneeland K |
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Institution: | (1) Department of Biological Sciences, Old Dominion University, Norfolk, VA, U.S.A, 23529-0266 |
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Abstract: | Long-term trends (i.e., 1985 through 1999; 14 1/2 yrs) of the phytoplankton community in Chesapeake Bay indicated patterns of increasing phytoplankton abundance and biomass associated with mainly diatoms and chlorophytes, and to a lesser degree dinoflagellates. Decreasing trends in productivity rates above the pycnocline were present over a shorter time period (10 1/2 yrs.), with evidence for increasing nitrogen limitation is indicated. Reduced light availability is inferred due to decreasing trends of Secchi depths and increased suspended solids trends, which were associated with decreasing trends in productivity rates. |
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Keywords: | Chesapeake Bay phytoplankton trends water quality parameters monitoring |
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