Abstract:Nutrient concentrations in seawater, and content of N, P, Si and chlorophyll a in different-sized particulates were measured in Dalian Bay during the cruises carried in summer and autumn of 2012. The temporal and spatial distributions of nutrients and chlorophyll a were studied, and the nutrient compositions and structures in different-sized fractions of phytoplankton were discussed. The high concentration areas of nutrients and chlorophyll a were usually in Choushuitao Bay and Tianshuitao Bay. The concentration decreased gradually from the inner bay to the outer bay. The distributions of nutrients in different-sized particulates showed no consistent trends, and the concentrations of nutrients in the northwest were higher than the middle of the bay. Seasonal variations in nutrients were higher in autumn than in summer (except DIN), however the content of chlorophyll a indicated an opposite variation. P was the limiting factor of phytoplankton growth, and Si was the limiting factor of nutrient compositions in different-sized fractions of phytoplankton. Among phytoplankton groups, picophytoplankton growth was the most adaptable in the nutrient structure of Dalian Bay.
张玉凤, 田金, 杨爽, 李爱, 王年斌. 大连湾海域营养盐时空分布、结构特征及其生态响应[J]. 中国环境科学, 2015, 35(1): 236-243.
ZHANG Yu-Feng, TIAN Jin, YANG Shuang, LI Ai, WANG Nian-Bin. Distribution and structure of nutrients in seawater and ecological responses in Dalian Bay. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(1): 236-243.