海洋科学2011，Vol.35Issue(7)：71-81,11.
小清河口的叶绿素a及理化环境因子的分布特征和统计分析
Chlorophyll a and other environmental parameters in the Xiaoqing River Estuary, Laizhou Bay： spatial distributions and statistical analysis
摘要
Abstract
Based on the observations from Jun. 6 to 7, 2002 in the Xiaoqing River Estuary, Laizhou Bay, Bohai, the spatial distributions and statistical correlations of chlorophyll a （Chl-a） and other environmental parameters, such as nutrient, dissolved oxygen （DO）, chemical oxygen demand （COD）, were analyzed. Regression analysis of Chl-a with DO and nutrients was performed to better understand their relationships. The research area is quite shallow, the water body is mixed equably, and there is no obvious stratification. So all parameters were well distributed vertically; however, the horizontal distributions of each parameter within and out of the estuary were significantly different. The levels of temperature, nutrients （except nitrate and nitrite）, COD and Chl-a were relatively higher within the Xiaoqing River Estuary, whereas salinity and DO were lower. The nitrate out of the estuary was more abundant than that within the estuary because of the input of the Yellow River, and it intensified the phosphorous limitation and reduced the silicate limitation out of the estuary. Except nitrite, all parameters showed good correlations with each other. There were negative correlations between Chl-a and DO or nitrate, and positive correlations between Chl-a and phosphorous, silicate or ammonia. Regression analysis showed that the relationships between Chl-a and DO and ammonia were concentration-dependent. When the DO was higher than 3mg/L or the ammonia was higher than 25pmol/L the Chl-a had a square parabolic correlation with either of them, and there was no obvious relationship found when the DO and ammonia were at lower concentrations. The phytoplankton multiplied excessively because of high nutrient levels in the estuary, and the mean Chl-a content in the water was up to 8mg/m3. However, the mean Chl-a out of he estuary was only 1.5 mg/m3 because of the phosphorous limitation. The mean value of DO out of the estuary was 3.Smg/L, but within the estuary it was lower than 2mg/L （there was no DO at the surface layer of most upriver station）. Hypoxia happened within the estuary, which was triggered by the co-pollution of nutrients and organic pollutants.关键词
小清河口/叶绿素a/溶解氧/营养盐/缺氧Key words
Xiaoqing River Estuary/chlorophyll a/dissolved oxygen/nutrient/hypoxia分类
资源环境引用本文复制引用
高元鹏,姚鹏,米铁柱,陈洪涛,张欣泉,于志刚..小清河口的叶绿素a及理化环境因子的分布特征和统计分析[J].海洋科学,2011,35(7):71-81,11.基金项目
国家水体污染控制与治理科技重大专项项目 （）
山东省自然科学基金项目 （）
