摘要
2013年8月、2013年10月和2014年5月先后3次对辽河口海域进行航次调查,对相关数据运用多种分析方法,研究了浮游植物粒级结构的时空分布特征及其主要环境影响因子。结果表明:辽河口叶绿素a浓度的季节变化特征表现为夏季最大、春季次之、秋季最小。空间分布特征表现为:春季西北部浓度高,东南区域浓度较低;夏秋呈相反的分布特征在夏季为近河口区域低、河口外区域高,且区域之间的浓度差异较大,最大值出现在西南区域;秋季表现为近河口区域高,远离河口区域较低,叶绿素a较大值主要分布在靠近河口的区域。在不同季节,不同粒径对叶绿素a的贡献率也不尽相同,Nano-级对总叶绿素a的贡献率在3个季度中均为最大。影响叶绿素a浓度变化的环境因素复杂:在春季,硝酸盐与叶绿素a呈负相关;在夏季,硝酸盐、磷酸盐、硅酸盐以及总氮均与叶绿素a呈显著负相关,悬浮物浓度与叶绿素a之间呈显著负相关,表层水温(SST)与叶绿素a表现为显著正相关;在秋季,悬浮物(SS)与叶绿素a存在显著正相关。
This paper applied several methods to analyze the spatial-temporal characteristics and environmental influencing factors of phytoplankton size-fraction in the Liaohe estuary,based on the sampling results of August,October in 2013 and May in 2014,The results showed that:there were significant differences in Chlorophyll a concentration among four seasons:the highest concentration in summer,spring secondly and the lowest concentration in autumn.The characteristics of spatial distribution showed a higher concentration in the northwest and a lower concentration in the southeast in spring.In summer,the area close to the estuary had a lower concentration and the area outside the estuary had a higher concentration.There were a large difference of the concentration between different regions and the maximum concentration appeared in the southwest region.Meanwhile,the opposite distribution characteristics were in summer and autumn.In different seasons,the contribution of different particle sizes to Chlorophyll a is different,and Nano sizes had the highest contribution in those seasons.There were complex environmental factors affecting the concentration of Chlorophyll a:in spring,nitrate was negatively correlated with Chlorophyll a;in summer,nitrate,phosphate,silicate,total nitrogen and suspended solids concentration were significantly negatively correlated with it.But surface water temperature(SST)showed a significant positive correlation with Chlorophyll a.In autumn,there was a significant positive correlation between suspended solids(SS)and Chlorophyll a.
作者
孙越峰
秦艳杰
李洪波
吴荷
SUN Yuefeng;QIN Yanjie;LI Hongbo;WU He(College of Life Science and Technology,Dalian Ocean University 116000,China;National Marine Environmental Monitoring Center 116000,China;Benxi Manchu Autonomous County Development and Reform Commission 117000,China;Benxi Meteorological Bureau 117000,China)
出处
《环境保护科学》
CAS
2020年第2期44-48,共5页
Environmental Protection Science
基金
海洋公益性行业科研专项(201305030)
海洋赤潮灾害立体监测技术与应用国家海洋局重点实验室基金(MATHAB 201702)。
关键词
浮游植物
叶绿素A
环境因子
辽河口海域
Phytoplankton
Chlorophyll a
Environmental Factors
Liaohe Estuary
