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首页> 外文期刊>ICES Journal of Marine Science >Development and application of seasonal indices of coastal-zone eutrophication
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Development and application of seasonal indices of coastal-zone eutrophication

机译：沿海富营养化季节指数的开发与应用

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摘要

Indices of coastal-zone eutrophication were developed based on combined values of nitrogen, phosphorus, and phytoplankton biomass (measured as Chl a). Measurements of nitrate, ammonia, phosphate, Chl a, and total phosphorous were taken at a series of inlets (bays and estuaries) along the Atlantic coast of Nova Scotia and the north shore of Prince Edward Island in summer 2006. Reference data from offshore sites and measured data are displayed on a N (nitrogen):P (phosphorus) nutrient-space diagram, which clearly indicates thresholds between impacted and unimpacted inlets. The problem of seasonal variability in nutrient levels and phytoplankton concentrations is accounted for by using an amalgamation of the Redfield nutrient ratios and the coastal carbon-Chl a ratio and allowing for sedimentary losses. This amalgamated ratio allows for the inverse seasonal relationship between labile nutrient levels and Chl a, permitting the collection, comparison, and interpretation of seasonally variable data. Measured concentrations of phosphate were adjusted from measured Chl a and were compared with measured levels of total phosphorous for the Nova Scotian sites to assess the accuracy of conversions. Given regional calibration, these indices should be applicable to all coastal waters.
机译：基于氮，磷和浮游植物生物量（以Chla计）的组合值，开发了沿海富营养化指标。在2006年夏季，沿着新斯科舍省大西洋沿岸和爱德华王子岛北岸的一系列进口（海湾和河口）对硝酸盐，氨，磷酸盐，Chla和总磷进行了测量。来自海上站点的参考数据在N（氮）：P（磷）营养空间图上显示测量的数据，该图清楚地指示了受影响和未受影响的进口之间的阈值。养分水平和浮游植物浓度季节性变化的问题是通过使用雷德菲尔德养分比和沿海碳-Chl比例的合并，并考虑到沉积物的损失来解决的。该混合比率允许不稳定营养水平与Chla之间存在反季节关系，从而可以收集，比较和解释季节性变量数据。从测得的Chla中调整测得的磷酸盐浓度，并将其与Nova Scotian站点中测得的总磷水平进行比较，以评估转化的准确性。进行区域校准后，这些指数应适用于所有沿海水域。

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