水产学报2012，Vol.36Issue(1)：132-139,8.DOI:10.3724/SP.J.1231.2012.27604
桑沟湾春季营养盐分布特征及赤潮暴发诱因
The distributions of dissolved nutrients in spring of Sungo Bay and potential reason of outbreak of red tide
摘要
Abstract
There are over 20 years of history of shellfish and seaweed polyculture in Sungo Bay. There had not been reported the outbreak of red tide in the Bay. However, in May 2011, there occurred large scale red tide outbreak, which almost spread over the total bay, and which caused higher mortality of cultivated shellfish. It is very important to understand the cause of red tide and to provide data for future environmental protection and aquaculture management. We just carried out one survey of environment monitoring before the outbreak of the red tide. Therefore, in this paper, the distributions of sea water temperature, salinity and dissolved nutrients were investigated in Sungo Bay in April 2006 and 2011 ,so as to understand the cause of the outbreak of red tide. The results showed that the concentration of dissolved inorganic nitrogen ( DIN), phosphate(PO3-4 )and silicate(Si)in Sungo Bay of 2011 was 5.6,3.2 and 1.3 times of the same period in 2006,respectively. The mole ratio of DIN/P,Si/P and Si/DIN was(66.33 ±47. 16), (35. 12 ±21.44)and (0.82 ±0. 77), respectively, which was seriously deviated from the Redfield ratio. Dissolved nutrients showed obvious block distribution, their horizontal distribution was characterized by a concentration decrease from the open sea to the inner bay,and there were two sub-peak values near the Yatou River and Bahegang areas,the isolines were almost overlaps with low-salinity isolines. The probable causes of red tide outbreak were discussed from four aspects including nutrients, hydrological characteristics, kelp and temperature.关键词
营养盐/赤潮/海水养殖/桑沟湾Key words
nutrient/ red tide/ mariculture/ Sungo Bay分类
资源环境引用本文复制引用
张继红,王巍,韩婷婷,刘顶海,方建光,蒋增杰,刘新杰,张新军,连岩..桑沟湾春季营养盐分布特征及赤潮暴发诱因[J].水产学报,2012,36(1):132-139,8.基金项目
国家自然科学基金项目(40876087) （40876087）
国家"九七三"重点基础研究发展计划(2011 CB409805) （2011 CB409805）
"十一五"国家科技支撑计划(2008BAD95B11,2011BAD13B06) （2008BAD95B11,2011BAD13B06）
