南黄海绿潮频发区营养盐的供给和控制机制

2007年以来，夏季在南黄海连续暴发（浒苔）绿潮，对黄海的生态环境产生了严重影响，引起了各级政府、公众和科学工作者的广泛关注。在南黄海绿潮形成的机制分析过程中，除了生物基础、气候条件（温度、风向等）外，营养盐的来源及其输运、归属等对浒苔的生成、发展过程提供物质基础和支撑。本课题以南黄海浒苔暴发海域为重点研究区域，通过历史资料收集、现场调查和模拟实验相结合，分析沿岸河流、大气沉降对营养盐输送的贡献，研究地下水排放、颗粒物—水界面和上升流输运对目标海域营养盐的贡献，通过同位素示踪手段分析不同水团对营养盐浓度、形态和分布的影响，阐明控制目标海域营养元素浓度、形态、结构和分布的关键生物地球化学过程。本项目的实施有助于深入认识该海域的生态特征和变化规律，阐明浒苔等生态灾害在此频发的物质基础和控制因素，研究结果将为山东、江苏沿海预报和防治绿潮等生态灾害提供关键科学依据。

Since 2007, a spectacular massive green tide of Enteromorpha prolifera has become a recurrent phenomenon appearing every summer in the South Yellow Sea and had a serious impact on the environment of the Yellow Sea, attracting great attention of scientists and local government. Based on the historical data, shipboard observations and culture experiments in situ, the nutrient inputs by river, submarine groundwater discharge, interface of water-sediment and upwelling would be analyzed in this study. The effect of different water masses on the concentration, speciation and distributions of nutrient would be studied during different isotopic tracer. The key biogeochemical process of controlling the concentration, speciation, structure and distribution of nutrient elements in the South Yellow Sea would be clarified. In this context, studying the physical-biogeochemical coupling off the Qingdao coast will increase the understanding of the regional ecological characteristics and provide scientific foundation for ecological research and management systems.The results will provide the key scientific basis for the forecast, the prevention and control of the green tide in the coast of Shandong and Jiangsu.