南黄海辐射沙脊群海域氮磷的季节变化及潜在性富营养化分析  

Seasonal change of nitrogen and phosphorus and analysis of potential eutrophication in radial sand ridge group region of the South Yellow Sea

作　　者：黎慧[1] 万夕和[1] 王李宝[1] 凌云[1] 沈辉[1] 高继先[1] 刘培廷[1] 张朝晖[1] 

机构地区：[1]江苏省海洋水产研究所,南通226007

出　　处：《生态科学》2016年第2期75-80,共6页Ecological Science

基　　金：国家科技支撑计划课题(2012BAC07B03);国家海洋局海洋生态环境科学与工程重点实验室2013年度开放基金(MESE-2012-03);2014江苏省科技条件建设财政专项(BM2014040)

摘　　要：根据2011年5、8、10月以及2012年2月对南黄海辐射沙脊群海域4个航次海水水质的调查资料,分析了该海水营养盐的分布特征和季节变化,利用潜在富营养化评价模式评价水质营养状况。结果表明,无机氮年平均浓度为0.476 mg·L^(–1),春季最高,平均为0.636 mg·L^(–1)。4个季节中溶解无机氮以硝态氮(NO_3—N)为主要存在形式,占年平均含量的76.6%,其中以春季比例为最高,氨氮(NH_4—N)占无机氮年平均含量的23.3%,亚硝氮(NO_2—N)含量较低,全年基本未检出。磷酸盐的年平均浓度为0.164 mg·L^(–1),季节变化呈现春季至冬季递增的分布特征。氮和磷的空间分布基本符合由陆向海逐渐降低的趋势。本海域春季和夏季属于中度营养水平,秋季和冬季属于氮限制中度营养水平。The distribution characteristics and variations of nutrients in the radial sand ridge group region of the South Yellow Sea were analyzed on May, August and October of 2011, and February of 2012, and the potential eutrophication of water quality was assessed. Our results showed that the annual mean concentrations of dissolved inorganic nitrogen（DIN） were 0.476 mg·L^（–1）. The concentration of DIN in spring was 0.636 mg·L^（–1）, higher than those of other seasons. NO_3—N was dominant in spring, contributing to 76.6% of annual mean DIN content. NH_3—N accounted for 23.3% of annual DIN concentration. The concentration of NO_2—N was not detected at almost all stations. The annual mean concentration of active phosphate was 0.164 mg·L^（–1）, higher than values of other seasons. The spatial distribution of nutrients was in line with trend that the nutrient concentration gradually downward from neritic areas to offshore areas. The seawater of this area was in medium trophic level state in spring and summer, and in medium nitrogen- limiting trophic level in autumn and winter.

关 键 词：南黄海 辐射沙脊群 氮 磷 潜在性富营养化 

分 类 号：X834[环境科学与工程—环境工程]