2013年夏季渤海环境因子与叶绿素a的空间分布特征及相关性分析

发布时间：2018-02-20 03:05

本文关键词： 渤海叶绿素a 环境因子主成分分析　出处：《海洋通报》2016年05期 　论文类型：期刊论文

【摘要】：通过对2013年7月渤海海域26个站点温度、盐度、营养盐及叶绿素a(Chl a)浓度的空间分布特征及其相关性进行了分析,发现:受渤海水深和夏季陆源河流输入影响,近岸水域表现出明显的高温、低盐与高营养盐特征,且垂直变化特征不显著;在水深较深的辽东湾湾口和渤海海峡,海水呈现明显的层化现象,表层水温高于中底层,而表层盐度与营养盐浓度则低于中底层。营养盐结构分析表明,渤海夏季磷酸盐浓度存在显著的绝对与相对限制,而受河流输入影响,硅酸盐的相对限制得到显著缓解。表层Chl a浓度的高值区位于滦河及复州河河口附近海区,中层与底层的高值区则出现在滦河与黄河口附近。Chl a浓度与环境因子的相关性分析表明,盐度、磷酸盐与硅酸盐的浓度、氮磷比、氮硅比是影响Chl a浓度空间分布的重要因素,且温度还影响到Chl a浓度的垂直分布。
[Abstract]:In July 2013, the spatial distribution characteristics and correlation of temperature, salinity, nutrient salt and chlorophyll a Chl a concentration in 26 stations in Bohai Sea were analyzed. It was found that the water depth of Bohai Sea and the input of terrestrial rivers in summer were the main factors affecting the distribution of temperature, salinity, nutrient and chlorophyll concentration. In the coastal waters, the characteristics of high temperature, low salt and high nutrient are not obvious, and the vertical variation is not obvious. In the deeper Liaodong Bay mouth and the Bohai Strait, the sea water is obviously stratified, and the surface water temperature is higher than that of the middle bottom. However, the salinity and nutrient concentration in the surface layer are lower than those in the middle and bottom layers, and the nutrient structure analysis shows that there are significant absolute and relative restrictions on phosphate concentration in summer in Bohai Sea, which are affected by the river input. The relative limit of silicate has been alleviated significantly. The high value area of surface Chl a concentration is located in the sea area near Luanhe River and Fuzhou River estuary. The correlation analysis between the concentration of Chla and environmental factors near Luanhe River and Yellow River Estuary shows that salinity, concentration of phosphate and silicate, ratio of nitrogen to phosphorus, ratio of nitrogen to silicon are important factors affecting spatial distribution of Chl a concentration. The temperature also affects the vertical distribution of Chl a concentration.
【作者单位】：中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室;中国科学院大学;
【基金】：中国科学院战略先导研究项目(XDA11020405) 国家自然科学基金面上项目(41376121) 山东省自然科学杰出基金(JQ201414) 国家基金委共享航次基金(41249901)
【分类号】：P734.4

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