威海湾营养盐季节变化特征及与环境因子的相关性分析  

Seasonal Variation Features of Nutrients and Influenced Environmental Factors in Weihai Bay

作　　者：陈玮[1] 吕振波[1] 

机构地区：[1]山东省海洋水产研究所,山东省海洋生态修复重点实验室,烟台264006

出　　处：《水生态学杂志》2012年第3期41-45,共5页Journal of Hydroecology

基　　金：海洋公益性行业科研专项经费项目(200905019);山东省908专项(SD9080209);山东省908专项山东近海经济生物产卵场;索饵场及其生态环境评价;水生动物营养与饲料"泰山学者岗位"

摘　　要：根据2006-2007年威海湾4个航次营养盐的调查资料,分析该海域海水中无机氮(DIN)、磷酸盐(PO43--P)和硅酸盐(SiO32--Si)的季节变化规律及其与环境因子的典型相关性。结果表明,NO3--N是DIN的主要存在形式,比例达50%以上。营养盐季节性变化明显,秋冬季DIN和PO43--P浓度较高,春夏季较低,SiO32--Si的变化则相反。四季DIN和PO43--P浓度均大于浮游植物生长阈值,仅冬季SiO23--Si浓度低于浮游植物生长阈值。冬季浮游植物生长的限制因子是Si,其他季节具有P限制的潜在性。营养盐和环境因子具有较大的典型相关性,其中,盐度、pH和NO3--N、PO43--P、SiO23--Si相关性最大,典型相关系数达到0.979。The variation features of nutrients include inorganic nitrogen （ DIN）, phosphate （ PO3-P） , and silicate （SiO3^2-Si） in Weihai Bay were analyzed based on the four investigations during 2006 -2007. The results showed that the main form of DIN was NO3-N with the percentage above of 50%. The seasonal variation of nutrients was significant. The concentrations of DIN and PO43-P was higher in autumn and winter than that in spring and summer. However, the seasonal variation of SiO3^2-Si was contrary to DIN and pO3--P. The concentrations of nutrients in all the seasons were higher than the growth threshold of phytoplankton, except SiO3^2-Si concentration was lower than the growth threshold of phytoplankton in winter. Si was the limiting factor for the growth of phytoplankton in winter, and P was the potential limiting factor in other seasons. There was a great canonical relationship between nutrients and environmental factors with the maximum coefficient of 0. 979 between salinity, pH and NO3-N, PO3-P, SiO3^2-Si.

关 键 词：营养盐 季节变化特征 威海湾 典型相关分析 

分 类 号：X824[环境科学与工程—环境工程]