摘要
为研究辽东湾海域水体中叶绿素a含量的分布特征,于2013年8月(夏季)和12月(冬季)在辽东湾设置38个站位,分别采集了表、中、底层的海水样品,检测夏季和冬季两个航次水体中叶绿素a的含量,分析该海域叶绿素a的季节分布与空间变化特征。同时利用相关性统计分析的方法,将各水质因子对叶绿素a含量影响的差异显著性进行了分析。结果显示,调查海域夏季的叶绿素a平均质量浓度为6.90μg/L,冬季为1.26μg/L,时间分布上夏季质量浓度明显高于冬季;空间水平分布上,夏季辽东湾湾口的平均叶绿素a质量浓度明显高于湾内的平均质量浓度,而冬季则越靠近湾口处叶绿素a的平均质量浓度越低,与夏季规律正好相反;空间垂直分布上,夏季表层叶绿素a的质量浓度最高,10m层次之,底层的质量浓度最低;而冬季的叶绿素a质量浓度则呈现10m层最高,底层次之,表层质量浓度最低的趋势。说明辽东湾叶绿素a含量存在明显的时间和空间分布特征;结合同期的温度、盐度、溶解氧等环境因子的调查结果,统计分析结果表明调查海域中环境因子温度、盐度、溶解氧和营养盐的季节性变化是导致叶绿素a含量趋势变化的最可能原因之一。
To investigate the distribution of chlorophyll-a in sea water of Liaodong Bay, 38 samples were collected in surface, interface, and bottom water in two seasons, August （summer） and December （win- ter） of 2013. The concentrations of chlorophyll-a were monitored and analyzed, and correlation analysis was used to show the linkages between different parameters, to determine the possible influential factors of the variation in chlorophyll-a concentration. The results showed that the average concentration of chloro- phyll-a in this area was 6.90 μg/L in summer, and 1.26 μg/L in winter, indicating that there was significantly higher average concentration of chlorophyll-a the in summer than that in winter. Analysis revealed that the level of ehlorophyll-a in the mouth of Liaodong bay was higher than that in the inner bay in summer horizontally. However, it has an opposite tendency in winter. Vertically, the maximal level of chlorophyll-a was observed in the surface layer of Liaodong Bay, followed by interface layer and the minimal at the bottom. In winter, the tendency made a great difference, the order of the chlorophyll-a concentration was descrbed as the interface layer, the bottom water and the surface water, showing obvious spatial and temporal distribution of chlorophyll-a. Concerned about the investigation of environmental factors such as temperature, salinity, dissolved oxygen and nutrients during the same period, it is concluded that this find- ing is primarily attributed to the seasonal variation in environmental factors in this area.
出处
《水产科学》
CAS
CSCD
北大核心
2016年第6期675-680,共6页
Fisheries Science
基金
辽宁省海洋与渔业厅科研项目(201419
201416
201303)
辽宁省科学事业公益研究基金资助项目(2014004019)
辽宁省博士启动基金资助项目(201601388)
关键词
辽东湾
叶绿素A
时间分布特征
空间分布规律
Liaodong Bay
chlorophyll-a
seasonal variation
spatial and temporal distribution
