Distribution,fluxes and decadal changes of nutrients in the Jiulong River Estuary,Southwest Taiwan Strait

查看全文 作　　者：YAN [1]XiuLi;ZHAI [1,2]WeiDong;HONG [1]HuaSheng;LI [1]Yan;GUO [1]WeiDong;HUANG [1]Xiao

机构地区：[1]State Key Laboratory of Marine Environmental Science,Xiamen University,Xiamen 361005,China;[2]Key Laboratory for Ecological Environment in Coastal Areas(State Oceanic Administration),National Marine Environmental Monitoring Center,Dalian 116023,China

出　　处：《Chinese Science Bulletin》索引2012年第57卷第18期,共12页

基　　金：supported by the National Natural Science Founda-tion of China(NSFC)(40810069004);the National Basic Research Program of China(2009CB421204);Sampling cruises were partially supported by the State Oceanic Administration of China(contract DOMEP-MEA-01-10);the NSFC(40949901) 摘　　要：The Jiulong River Estuary (JRE) is a typical subtropical macro-tide estuary on the southwest coast of the Taiwan Strait (TWS),which has been greatly impacted by human activities over the past 30 years.To understand nutrient dynamics and fluxes under such a heavy background of anthropogenic perturbation,eight cruises were conducted from April 2008 to April 2011,covering both wet (May to September) and dry (October to April next year) seasons.Nutrient concentrations were very high for the freshwater end-member in the upper reach of the JRE (nitrate (NO 3-N):120-230 mol L-1 ;nitrite (NO 2-N):5-15 mol L-1 ;ammonium (NH 4-N):15-170 mol L-1 ;soluble reactive phosphorus (SRP):1.2-3.5 mol L-1 ;dissolved silicate (DSi):200-340 mol L-1).In dry seasons,concentrations of these nutrients were higher than in wet seasons.Nitrate was the dominant chemical species of dissolved inorganic nitrogen (DIN),with percentages of 67%-96% in wet seasons and 55%-72% in dry seasons.Distributions of NO 3-N and DSi against salinity were nearly constant during all cruises,and showed generally conservative mixing behaviors in the estuary (1 关键词：年代际变化九龙江口营养物质台湾海峡通量西南溶解无机氮海岸河口

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Distribution,fluxes and decadal changes of nutrients in the Jiulong River Estuary,Southwest Taiwan Strait

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