摘要
根据2004～2008年每年3～11月份深圳大鹏湾南澳赤潮监控区表层海水营养盐的监测基础资料,对监控区水域营养盐变化及其结构特征进行了分析评价。结果表明:近5 a监控区Si、N、P营养盐的空间波动程度存在明显年际差异,营养盐含量受监控区藻类等浮游植物的生命活动和陆源径流以及鱼、贝类新陈代谢强弱的共同影响。5 a来NO2-N、NH4-N和SiO3-Si的含量呈波动性升高,PO4-P含量保持稳定,NO3-N含量有所降低,Si∶P值上升比较明显,而N∶P和Si∶N值波动较大。2004～2005年监控区无机氮主要存在形式是NO3-N,2006～2008年主要存在形式为NH4-N。P一直是该海域初级生产力的主要潜在限制性因子。5 a来监控区海水符合养殖功能区的水质标准要求,未受到PO4-P和DIN营养盐的污染,处于贫营养状态。
On the basis of the monitoring data of nutrients（Si,N and P） in surface seawater from Mar.to Nov.（2004 ～2008）in the red tide-monitoring area of Nan ao,the variations of nutrients and characteristics of their structure were analyzed and discussed in periods of high frequency for the red tide.The results of analysis shown that the water quality in the red tide-monitoring area was in an oligotrophic lever and was unpolluted by N and P in last five years;The annual difference of the spatial fluctuation of Si,N and P content was observed obviously.The character of monthly variations of Si,N and P content was mainly under the influence of phytoplankton life,the stream-flow from land and fish-metabolism activity.In last five years.NO2-N,NH4-N and SiO3-Si contents were increased appreciably,NO3-N content was decreased appreciably,PO4-P kept the steady;N/ P and Si/N were changed obviously,Si/P was increased appreciably.The dominating existing form of inorganic-nitrogen（DIN） was NO3-N from 2004 to 2005,but was NH4-N from 2006 to 2008.P was the main potential limit factor to the primary production in the red tide-monitoring area of Nan,ao in last five years.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2010年第4期564-569,共6页
Marine Environmental Science
关键词
大鹏湾
南澳赤潮监控区
营养盐
富营养化
Dapeng Bay
red tide-monitoring area of Nan ao
nutrient
eutrophication
