AI Article Synopsis
- The study analyzed the impact of nutrient levels and water clarity (turbidity) on phytoplankton growth in Gwangyang Bay, Korea, over nine years in a polluted estuary.
- Dredging and river discharge affected nutrient levels, with low turbidity in river water contributing to nutrient loading, while NH (ammonium) limited phytoplankton growth.
- The findings revealed that high suspended particle matter (SPM) and NH negatively impacted chlorophyll a levels, highlighting the complex interactions influencing phytoplankton dynamics in the bay.
Article Abstract
We examined the effects of nutrient availability and turbidity on phytoplankton biomass over 9 years in Gwanyang Bay, Korea, which is an anthropogenically polluted and complex estuary. While dredging and reclamation shaped geochemical features, river discharge with low-turbidity water and sewage treatment plants contributed to nutrient loading. The replete levels of nutrients and short water-residence time suggest the inapplicability of the washout theory, whereas the presence of NH suppressed the growth of phytoplankton. A reduction in the river discharge caused a concomitant decline in the loading and dilution of suspended particles. All these features led to an increase in SPM, light limitation, and NH concentration. GLM estimates revealed negative effects of NH and SPM on chlorophyll a over 9 years while SEM verified synergistic effects of NH and SPM compared with positive effects of NO + NO. Our findings provide new insights into phytoplankton bloom dynamics in Gwangyang Bay.
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| http://dx.doi.org/10.1016/j.marpolbul.2020.111756 | DOI Listing |
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