Percentage diagram of selected pollen taxa from the C1 core in Lake Chaohu. (IMAGE)

Science China Press

Percentage diagram of selected pollen taxa from the C1 core in Lake Chaohu.

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This diagram contains abundant information, dividing the vegetation development history in the Chaohu Lake area into six stages. From the diagram, it is evident that, apart from changes in tree types, there were significant fluctuations in the Aquatic herb pollen percentages represented by 25~40 μm Poaceae (primarily Phragmites), Pediastrum percentages, and >125 μm charcoal concentrations. These variations reflect the ecological characteristics and extent changes of lakefront wetlands under the influence of drier climate conditions and human agricultural development.

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