Interaction of Light and Zooplankton on Phytoplankton Community:Taking the Xiaoxingkai Lake as An Example
Light is an essential energy source for phytoplankton photosynthesis,and zooplankton are important predators of phytoplankton,both of which directly affect phytoplankton growth and community structure.However,the response characteristics of phytoplankton community structure to the interaction of light and predation stress are still unclear.In mid-August 2022,we collected water samples from the Xiaoxingkai Lake to conduct a simulated research on the response characteristics of phytoplankton community composition and growth to changing light intensity and zooplankton predation stress through indoor culture experiments.The results showed that phytoplankton abundance had a linear relationship with light intensity,and there was a time lag in the response of phytoplankton abundance to light intensity changes.The presence of zooplankton reduced the biodiversity of phytoplankton communities,but increased the competitive advantage of the bloom algae Microcystis aeruginosa.Our study aids in deeply understanding the response mechanism of phytoplankton to environmental changes in lake ecosystem,and provides scientific basis for promoting the prevention of algae bloom and sustainable management in the Xingkai Lake.
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