The ecological problems and corresponding controlling strategies for the Daya Bay are introduced in this paper. The characteristics of degraded ecosystem in the Daya Bay are as follows. Ecosystem structure is destroyed; biological community is miniaturizing; biodiversity is simplifying; biological resources are declining; ecosystem services of mangroves and coral reefs are declining; coastal wetlands are decreasing; biomass is declining as a result of habitat deterioration. More and more red tide events occur due to nutrition environment deterioration, etc. This paper discusses the impact of human activities on the marine ecosystem of Daya Bay, and proposes some suggestions for restoring, reconstructing and making sustainable utilization of the damaged coastal ecosystem.
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