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首页> 外文期刊>ICES Journal of Marine Science >The impact of sewage on environmental quality and the mesozooplankton community in a highly eutrophic estuary in Argentina
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The impact of sewage on environmental quality and the mesozooplankton community in a highly eutrophic estuary in Argentina

机译：阿根廷高度富营养化的河口污水对环境质量和中游浮游生物群落的影响

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摘要

Eutrophication caused by human sewage is a growing phenomenon along coasts. Mesozooplankton abundance, community structure, and environmental quality were compared at two sites in the inner Bahia Blanca Estuary (BBE), Argentina, one receiving regional sewage discharge (Canal Vieja), and the other a non-impacted area (Bahia del Medio). Comparisons of mean abundance and multi-variate analyses were performed to detect spatial and temporal variations in both environmental and biotic variables. Significantly higher amounts of nitrogen and phosphorus and lower oxygen and pH were recorded at Canal Vieja. Larvae of the detritivorous crab Neohelice granulata were more abundant at Canal Vieja, whereas the common estuarine copepod species Acartia tonsa was more abundant at Bahia del Medio, where the mesozooplankton community was typical for the estuary. Although mesozooplankton is likely to be adapted to the high organic matter content in the BBE, the environmental conditions at Canal Vieja appear to favour Neohelice granulata, and this species should be considered as a potential indicator of the impact of sewage in future monitoring programmes. Particulate organic carbon and chlorophyll a were not influenced by organic loading in this naturally eutrophic estuary.
机译：人为污水造成的富营养化现象在沿海地区日益普遍。在阿根廷内巴伊亚布兰卡河口（BBE）的两个地点比较了中游浮游生物的丰度，群落结构和环境质量，一个地点接受了区域污水排放（运河Vieja），另一个地点未受到影响（Bahia del Medio）。进行了平均丰度和多变量分析的比较，以检测环境和生物变量的时空变化。运河维耶哈的氮和磷含量明显较高，而氧气和pH值较低。在维耶哈运河，有害的蟹新螺旋藻的幼虫较多，而在巴伊亚德尔梅迪奥，河口co足类常见的A足类物种阿卡迪亚·坦萨则更为丰富，那里的中游浮游动物群落是河口的典型代表。尽管中层浮游生物很可能适合BBE中的高有机物含量，但维耶哈运河的环境条件似乎有利于新鳞片颗粒，并且在未来的监测计划中应将该物种视为污水影响的潜在指标。在这个自然富营养化的河口中，有机碳含量不会影响颗粒状有机碳和叶绿素a。

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