Spatial and Seasonal Variations in Chlorophyll-Nutrient Relationships in The Shallow Hypertrophic Lake Manyas, Turkey |
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Authors: | Kemal Çelik |
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Institution: | (1) Department of Biology, Balıkesir University, 10100 Balıkesir, Turkey |
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Abstract: | Regression and correlation analyses were used to predict responses of phytoplankton biomass (chlorophyll) (μg L−1) to nitrate (NO3) (mg L−1), phosphate (PO4) (mg L−1) and ammonium (NH4) (mg L−1) dynamics in the shallow hypertrophic Lake Manyas, Turkey. Nutrient concentrations showed a descending gradient with distance,
while chlorophyll concentrations showed an ascending gradient with the distance from the Sığırcı Inlet to the Karadere Outlet.
Higher nutrient concentrations did always not coincide with higher chlorophyll concentrations. The results showed that regression
models developed using seasonal data were more accurate in predicting chlorophyll concentrations than those developed using
the pooled data from whole year (based on R
2 and the difference between the measured and predicted values). The findings also revealed that within a single large shallow
lake, chlorophyll-nutrient relationships might show significant variations spatially. The objective of this study was to determine
the seasonal and spatial variations in the relationships between chlorophyll, nitrate, phosphate and ammonium in the shallow
hypertrophic Lake Manyas, Turkey. |
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Keywords: | ammonium chlorophyll Lake Manyas nitrate phosphate |
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