Nutrient Dynamics in Jiaozhou Bay
Nutrient Dynamics in Jiaozhou Bay
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DOI：
10.1007/s11267-007-9125-y
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发表时间：
2007-06
期刊：
影响因子：
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通讯作者：
Sumei Liu;Xiao Li;Jing Zhang;Hao Wei;J. Ren;Gui‐Ling Zhang
中科院分区：
文献类型：
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作者：
Sumei Liu;Xiao Li;Jing Zhang;Hao Wei;J. Ren;Gui‐Ling Zhang
分别在2002年10月小潮(秋季)和2003年5月(春季)小潮和大潮期间对胶州湾进行了三次巡航，以了解外部营养物质输入与物理输送和内部生物地球化学过程的相对重要性。测定了营养元素(、硅酸、总溶解氮、总磷、溶解有机氮、磷)。营养盐浓度北部高于南部。JZB中高浓度的AND和DON证明了人为输入。环境养分率表明，浮游植物生长的潜在限制营养物质是硅，然后是磷。营养盐表现出明显的潮汐效应，涨潮时低，落潮时高。营养元素北向JZB输送，南(即黄海)输出，随季节、潮汐周期和调查地点的不同而不同。JZB与黄海之间的水交换输出，不输出JZB，同时向JZB输入硅酸和DOP。营养平衡表明，河流输入和污水排放是JZB生态系统营养物质的主要来源，剩余流量是次要的。除DON外，JZB是我们研究的营养元素的汇。化学计量计算表明，JZB是一个净自养系统。
Three cruises were carried out in Jiaozhou Bay (JZB) in the neap tide in October 2002 (fall) and in both neap and spring tides in May 2003 (spring) to understand the relative importance of external nutrient inputs versus physical transport and internal biogeochemical processes. Nutrients (,,,, silicic acid, total dissolved nitrogen (TDN) and phosphorus (TDP), dissolved organic nitrogen (DON) and phosphorus (DOP)) were measured. The concentrations of nutrients were higher in the northern part than in the southern part. High concentrations ofand DON in JZB demonstrated the anthropogenic input. Ambient nutrient ratios indicated that the potential limiting nutrients for phytoplankton growth were silicon, and then phosphorus. Nutrients showed an obvious tidal effect with low values at flood tide and high values at ebb tide. Nutrient elements were transported into JZB in the north and output in the south (i.e., into the Yellow Sea), which varied with season, tidal cycle and investigation sites. Water exchange between JZB and the Yellow Sea exports,and DON out of JZB, while it inputs, silicic acid and DOP into JZB. Nutrient budgets demonstrate that riverine input and wastewater discharge are major sources of nutrients, while residual flow is of minor importance in JZB ecosystem. JZB is a sink for the nutrient elements we studied except for DON. Stoichiometric calculations demonstrate that JZB is a net autotrophic system.