荣成湾营养盐的时空分布特征及其影响因素分析  

Analysis on the temporal and spatial distribution of nutrients and the influence factors in Rongcheng Bay

作　　者：谢琳萍[1,2] 蒲新明[1,2] 孙霞[1,2] 王保栋[1,2] 

机构地区：[1]国家海洋局第一海洋研究所海洋生态研究中心,山东青岛266061 [2]海洋生态环境科学与工程国家海洋局重点实验室,山东青岛266061

出　　处：《海洋通报》2013年第1期19-27,共9页Marine Science Bulletin

基　　金：海洋公益性行业科研专项(200805069)

摘　　要：根据2009年2月、5月、8月、11月4个航次的调查数据,分析了荣成湾水体的溶解无机氮(DIN)、磷酸盐(PO4-P)、硅酸盐(SiO3-S)i的时空分布特征及其影响因素,并对荣成湾营养盐的潜在限制进行了讨论。结果表明,荣成湾营养盐含量及分布与养殖海带的生长周期有着紧密的联系:海带生长初期(11月)营养盐含量较高,营养盐的平面分布呈近岸高外海低的变化趋势,NO3-N为DIN的主要成分;海带生长后期(5月份)水体营养盐含量较低,DIN分布趋势与11月份基本一致,PO4-P表现为湾中部较高,近岸和湾外较低,NO3-N和NH4-N是DIN的主要成分;海带收获后期(8月份)营养盐含量极低,DIN呈近岸浓度低外海浓度高的变化趋势,PO4-P和SiO3-Si则呈近岸高外海低的变化趋势,DIN主要以NH4-N为主。荣成湾水体浮游植物生长在春、秋和冬季基本不受营养盐的限制,夏季主要受到P的限制,基本不受N、Si的限制。Based on four seasonal investigation data collected from four cruises during 2009 in Rongcheng Bay,the temporal and spatial distribution characteristics of dissolved inorganic nitrogen,phosphate and silicate and its influential factors were studied.The result showed that the concentration and distribution of nutrients had close relationship with the growth of kelp.Nutrient concentration was higher in the initial algal growth stage(November) and decreased from inshore to offshore area,and NO3-N was the predominant species of DIN.When kelp reached high biomass in May,DIN concentration decreased and the percentage of NO3-N in DIN increased.At the end of kelp harvest season of August,the nutrient level reached the lowest level of the year,and NH4-N was the dominant species of DIN.For the nutrient limitation of phytoplankton,phosphate was the limiting nutrient in summer,but there was no severe nutrient limitation in other seasons.

关 键 词：营养盐 营养限制 海带养殖 荣成湾 

分 类 号：P593[天文地球—地球化学]