基于富营养化状态指数（TRIX）法的象山港富营养化评价

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中图分类号：X55；P942；P734 文献标志码：A 文章编号：1005—9857（2025）07—0111—10

Evaluation of Eutrophication in Xiangshan Bay Based on the Trophic Index （TRIX）

XU Manqiu 1，2 ， ZHOU Hao²， JIANG Zhibing1，2，4，5.6 ， ZHU Yuanl 2，5，6 ，DENG Bangping7，YU Peisong2，5 ， YANG Jingwen1 ， ZENG Jiangning1，2.5，（1.Marine Science and Technology College，Zhejiang Ocean University，Zhoushan 316021，China;2.Key Laboratory of Marine Ecosystem Dynamics，Second Institute of Oceanography，MNR，Hangzhou 310012，China;3.Functions of Wenzhou Municipal Natural Resources and Planning Bureau，Wenzhou 325o27，China; 4.State Key Laboratory of Satelite Ocean Environment Dynamics，Second Institute of Oceanography， MNR，Hangzhou 310012，China; 5.Key Laboratory of Nearshore Engineering Environment and Ecological Security of Zhejiang Province， Hangzhou 310012，China; 6.Observation and Research Station of Marine Ecosystem in the Yangtze River Delta， MNR，Zhoushan 316021，China； 7.Key Laboratory of Marine Ecological Monitoring and Restoration Technologies，East China Sea Ecology Center， MNR，Shanghai 201206，China）

Abstract：The scientific eutrophication evaluation method is significant to the assessment， management and restoration of coastal eutrophication. Because of the lack of biological indicators in the previous eutrophication evaluation for Xiangshan Bay，we used the Trophic Index （TRIX） to analyze the temporal and spatial variation in the eutrophication status and associated controlling factors，based on the survey results of four cruises in January （winter），April （spring）， July （summer）and October （autumn） in 2015. The results showed that eutrophication in Xiangshan Bay was severe in 2O15，with TRIX value >5 for 89% of the total samples，indicating eutrophic or extremely eutrophic conditions. The eutrophication level was higher in the upper than in the lower bay. Among all seasons，the eutrophication level was the highest in summer. The high value of chlorophyll a in the upper bay in winter may be affected by the thermal discharge from the power plant. This study suggests that the TRIX effectively reflects the seasonal and spatial variation in eutrophication symptoms in the Xiangshan Bay，which can be used for the practical requirements of refined management of coastal eutrophication.

Keywords： Eutrophication evaluation，Trophic index （TRIX），Nutrient， Chlorophyll a，Bay

0 引言

近几十年来，受人口增长和工农业活动加剧的影响，富营养化已成为全球近海生态系统健康面临的主要威胁之一[1]，科学评估近海富营养化是缓解和管控该问题的重要手段。（剩余14800字）