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首页> 外文期刊>Limnologica >Macrozoobenthic community structure in a large shallow lake: Disentangling the effect of eutrophication and wind-wave disturbance
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Macrozoobenthic community structure in a large shallow lake: Disentangling the effect of eutrophication and wind-wave disturbance

机译：大型浅水湖泊中大型动物的群落结构：解析富营养化和风浪干扰的影响

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Biological communities in shallow lakes are often subject to the combined effects of eutrophication and wind-wave disturbance. However, their relative importance in regulating macrozoobenthic community assembly has not been well addressed. In the present study, a monthly sampling of macrozoobenthos and environmental parameters was conducted at ten sites from December 2012 to November 2013 in Lake Hongze, the fourth largest freshwater lake in China, which has undergone serious water quality deterioration over the past few decades. A total of 30 taxa were recorded during the 12 sampling occasions, including 6 chironomids, 6 bivalves, 4 gastropods, 4 oligochaetes, 4 polychaetes, 4 crustaceans and 2 other aquatic insects. The mean abundance and biomass of total macrozoobenthos varied greatly among the ten sites and presented distinctive taxonomic composition between the protected bays and the offshore zone. Three eutrophication parameters (including permanganate index (CODMn), chlorophyll a, and total phosphorus in surficial sediments) and three wind-wave variables (including Secchi depth, turbidity, and mean effective fetch) were highly related to spatial variation of macrozoobenthic assemblages. When eutrophication variables were controlled, there was a significant correlation between community similarity and wind-wave disturbance condition, and vice versa. Variation partitioning showed that wind wave disturbance explained 15.9% of the variation in benthic community composition, slightly lower than that explained by eutrophication (17.9%). These results indicate that wind-wave disturbance is as important as eutrophication in regulating benthic community structure in this large shallow lake. Wind wave disturbance imposed opposite effects on benthic community relative to eutrophication, and were more prominent in the offshore zone weakening the role of eutrophication. (C) 2016 Elsevier GmbH. All rights reserved.
机译：浅水湖泊中的生物群落经常受到富营养化和风浪干扰的双重影响。但是，它们在调节大型动物联合体组装中的相对重要性尚未得到很好的解决。在本研究中，从2012年12月至2013年11月，在中国第四大淡水湖洪泽湖的十个地点进行了大型昆虫和环境参数的每月采样，过去几十年水质已经严重恶化。在12个采样时间中共记录了30个分类单元，包括6个鳞翅类，6个双壳类，4个腹足类，4个寡毛类，4个多毛类，4个甲壳类和2个其他水生昆虫。在十个地点之间，总大型动物的平均丰度和生物量差异很大，并且在受保护的海湾和近海区域之间呈现出独特的分类学组成。三种富营养化参数（包括高锰酸盐指数（CODMn），叶绿素a和表层沉积物中的总磷）和三个风浪变量（包括Secchi深度，浊度和平均有效提取量）与大型恒生组合的空间变化高度相关。当控制了富营养化变量时，群落相似性与风浪干扰条件之间存在显着相关性，反之亦然。变化分区显示，风波扰动解释了底栖生物群落组成变化的15.9％，略低于富营养化所解释的结果（17.9％）。这些结果表明，在调节这个大浅湖底栖生物群落结构中，风浪干扰与富营养化一样重要。风浪扰动相对于富营养化对底栖生物产生相反的影响，并且在近海地区更为突出，削弱了富营养化的作用。 （C）2016 Elsevier GmbH。版权所有。

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