浙江乐清湾海域生态健康评价和分析

Assessment and Analysis on the Marine Ecosystem Health in the Yueqing Bay

根据2013-2014年对乐清湾海域生态环境的综合调查结果,采用《近岸海域生态健康评价指南》(HY/T087-2005)中的河口及海湾生态系统健康评价方法对该海域的生态系统健康状况进行评价和分析。结果显示,水环境健康指数、沉积物健康指数、生物残毒健康指数、栖息地健康指数和生物健康指数分别为10.89、10.00、8.87、5.00和16.46,海域生态健康指数为51.22。表明,乐清湾海域水环境处于亚健康状态,沉积环境处于健康状态,未受生物残毒污染,而栖息地和生物指标处于不健康状态。综合5类评价因子的的评价结果,判定该海域生态环境处于亚健康状态。

Based on the survey results of the marine environment in the coastal waters of the Yueqing bay in Zhejiang Autonomous Region from 2013 to 2014, assessment and analysis are conducted on the marine ecosystem health in the study area with the ecosystem health assessment method for estuaries and gulfs provided in the Guideline for Assessment of Coastal Marine Ecosystem Health(2005).The health index of water environment, sedimentary environment, biological residue, habitat and marine organism is 10.89,10.00,8.87,5.00 and 16.46, respectively. The index value of marine ecosystem environmental health is 51.22. The results indicate that the water environment in a rating of sub-healthy status, sedimentary environment and biological residue are in a health status, whereas the marine organism index and the habitat index have reached a unhealthy status. Finally, the levels of the five categories are combined into a single rating for the coastal of the yueqing bay, which results in a rating of sub-healthy status in the study area.