Simple production structure with planting diversity index from 1.5 to 1.8;
沙区产业结构单一，种植业多样化指数在1.5—1.8之间；
Diversity index of phytoplankton in flood period is higher than that in dry period.
丰水期浮游植物多样性指数大于平水期。
Diversity index of phytoplankton in flood period is higher than that in dry period.
丰水期浮游植物多样性指数大于平水期。
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