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首页> 外文期刊>Estuarine Coastal and Shelf Science >Factors affecting the accumulation of phytoplankton biomass in Irish estuaries and nearshore coastal waters: A conceptual model
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Factors affecting the accumulation of phytoplankton biomass in Irish estuaries and nearshore coastal waters: A conceptual model

机译：影响爱尔兰河口和近岸沿海水域浮游植物生物量积累的因素：一个概念模型

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A multivariate statistical approach was used to investigate the response of phytoplankton in Irish estuaries and nearshore coastal waters to nutrient enrichment and to examine the factors which modulate this response. The analysis suggests that while many estuaries are nutrient-enriched, relatively few display phytoplankton-related symptoms of eutrophication as the response to nutrients is primarily affected by insufficient retention time, in some by inadequate light availability, and only rarely by both factors acting together. Nearshore coastal waters are nitrogen (N) and silica (Si) limited in summer, but in some nearshore waters along the south coast, where N is elevated, phosphorus (P) is potentially limiting. The reduction in P loadings to estuarine waters is likely to lead to an improvement in the eutrophication status of these mainly P-limited waters. The disproportionate reduction in loadings of P compared to N (52% versus 24%, since the early 1990s), and the potential weakening of the estuarine N filter, as eutrophication symptoms lessen, may result in the downstream movement of nitrogen to N-limited coastal waters. These findings support the view that an integrated dual-nutrient reduction strategy is required to address eutrophication along the freshwater-marine continuum. The outcome of the analysis is a conceptual model which is of direct value and use to water managers in determining the relative susceptibility of these waters to nutrient enrichment. This understanding can in turn be used to develop informed programmes of measures which are targeted and ultimately cost effective. (C) 2015 Elsevier Ltd. All rights reserved.
机译：多元统计方法用于研究爱尔兰河口和近岸沿海水域浮游植物对营养富集的响应，并研究调节该响应的因素。分析表明，尽管许多河口营养丰富，但富营养化的浮游植物相关症状却相对较少，因为对营养的响应主要受停留时间不足的影响，在某些情况下受光利用率不足的影响，而很少受两个因素共同作用的影响。夏季，近岸沿海水域的氮（N）和二氧化硅（Si）受到限制，但是在南海岸的一些近岸水域中，氮含量升高，磷（P）可能受到限制。减少河口水体中磷的含量可能会导致这些主要限磷水体的富营养化状况有所改善。与氮相比，磷的负载不成比例地减少（自1990年代初以来，分别为52％和24％），并且随着富营养化症状的减轻，河口N过滤器的潜在减弱可能会导致下游向氮的迁移。沿海水域。这些发现支持这样一种观点，即需要采取综合的双重营养减少策略来解决沿淡水海洋连续体的富营养化问题。分析的结果是一个概念模型，具有直接价值，可用于水管理人员确定这些水对养分富集的相对敏感性。这种理解又可以用来制定有针对性的措施计划，并最终使之具有成本效益。 （C）2015 Elsevier Ltd.保留所有权利。

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