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首页> 外文期刊>Journal of Hydrology >Macrozoobenthos variations in shallow connected lakes under the influence of intense hydrologic pulse changes
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Macrozoobenthos variations in shallow connected lakes under the influence of intense hydrologic pulse changes

机译：宏Zoobenthos浅层湖泊的变化在激烈的水文脉冲变化的影响下

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Hydrologic pulse represent one of the dominant factors controlling the distribution of aquatic organisms. Changes in hydrologic pulses may change the surroundings of the organism and then affect their distribution and community structure. Here, based on the data from a rainy season and a dry season, the water quality, heavy metal in the sediment and macrozoobenthos community structure in two shallow lakes, Nansihu Lake (NSH) and Dongpinghu Lake (DPH, were analyzed. The results showed that the water diversion pulse participated in the influence of runoff pulse on NSH and DPH. The macrozoobenthos community in NSH and DPH were similar after the hydrologic pulse changed, this might be due to these two lakes were connected by the South-to-North Water Transfer Project (SNWTP). Along the direction of water transfer, the macrozoobenthos communities were gradually dominated by small-size species with as water quality decreased. Compared with community structure before the SNWTP, the macrozoobenthos changed from dominant aquatic insect to dominant Mollusca in NSH, and changed from dominant Mollusca and Oligochaeta to dominant Mollusca in DPH. The water diversion pulse, in which the direction of water transfer was opposite to that of natural water flow, affected the distribution of nitrogen and phosphorous in water and heavy metals in sediment. In addition, the introduction of exogenous water caused by the SNWTP changed water quality and heavy metals content in the sediment and water depth in NSH and DPH. These changes together affected the community structure and distribution of macrozoobenthos. These findings enable a better understanding of the ecological impact of intense hydrologic pulse changes caused by water transfer projects.
机译：水文脉冲代表控制水生生物分布的主要因素之一。水文脉冲的变化可以改变生物体的周围环境，然后影响它们的分布和群落结构。在这里，根据雨季和旱季的数据，分析了沉积物的水质，沉积物中的重金属和宏Zoobenthos群落结构，在两个浅湖中，南豪湖（Nsh）和东平湖湖（DPH，DPH。结果表明进出水脉冲参与了径流脉冲对NSH和DPH的影响。在水文脉冲发生变化后，NSH和DPH中的宏子杂交群落相似，这可能是由于这两个湖泊通过南北水连接转移项目（SNWTP）。沿着水转移方向，宏ZoobentHOS社区逐渐被用水质量下降的小型物种统治。与SNWTP之前的群落结构相比，宏Zoohenthos从占优势水生昆虫改为NSH ，并从占优势的软体动物和oligochaeta改变为DPH中的占主导体Mollusca。水转移脉冲，水转度方向与此相反天然水流，影响水和重金属中氮气分布和沉积物。此外，引入由SNWTP引起的外源性水在NSH和DPH中改变了沉积物和水深的水质和重金属含量。这些变化在一起影响了宏zoobenthos的社区结构和分布。这些发现能够更好地理解由水转移项目引起的强烈水文脉冲变化的生态影响。

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