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Regularities of Spatiotemporal Dynamics of Chironomid Communities (Chironomidae, Diptera) in the Kuibyshev Reservoir
Water Resources ( IF 1 ) Pub Date : 2021-05-25 , DOI: 10.1134/s0097807821030143
T. D. Zinchenko , V. K. Shitikov

Abstract

The dynamics of benthic communities of various reaches of the Kuibyshev Reservoir over a long-term observation period 1966 to 2016 has been statistically analyzed. The results of a comparison of the spatial-temporal distribution of structural indicators of chironomid (Chironomidae) communities, including the species diversity and abundance of 48 taxa based on hydrobiological survey data in nine large parts of the reservoir for different years, are presented. Nonparametric analysis of variance revealed a high statistical significance of the variability of the species composition of benthic communities under the influence of temporal and spatial factors. Using multidimensional ordination and generalized Procrustes analysis, the dynamics of the distribution of ecosystem objects (individual species and areas) in the coordinates of two latent axes of maximum variation is shown. A geometric analysis of the multidimensional trajectories of changes in the community of aquatic organisms in individual reaches for different periods of time is carried out. Similar developmental processes of chironomid communities were revealed in a longitudinal succession of reaches on the former channel and sunken floodplain, while the analogous structural characteristics of the Kamskiy reach and eutrophic Cheremshanskiy Bay are specific. The priority role of chironomids as the most important indicator group necessary for biotic assessment of long-term (50 years) changes in the ecological state of a large reservoir is considered.



中文翻译:

居比雪夫水库中奇龙类群落(temp科,双翅类)的时空动态规律

摘要

统计分析了1966年至2016年长期观察的库比雪夫水库各段底栖动物群落的动态。提出了基于水生生物学调查数据的不同年份的水生生物调查数据,对猫科动物(Chironomidae)群落结构指标的时空分布进行比较的结果,其中包括48个分类单元的物种多样性和丰富度。对方差的非参数分析表明,在时间和空间因素的影响下,底栖群落物种组成的变异性具有很高的统计意义。使用多维排序和广义Procrustes分析,在最大变化的两个潜轴坐标中显示了生态系统对象(单个物种和区域)分布的动态。对不同时间段内单个河段水生生物群落变化的多维轨迹进行了几何分析。在前海峡和下沉的洪泛区的纵向连续演替中,揭示了类似的尺虫群落的发育过程,而坎姆斯基河段和富营养化的Cheremshanskiy湾的类似结构特征则是特定的。考虑到将Chironomids作为对大型水库生态状态的长期(50年)变化进行生物评估所需的最重要指标组的优先作用。对不同时间段内单个河段水生生物群落变化的多维轨迹进行了几何分析。在前海峡和下沉的洪泛区的纵向连续演替中,揭示了类似的尺虫群落的发育过程,而坎姆斯基河段和富营养化的Cheremshanskiy湾的类似结构特征则是特定的。考虑到将Chironomids作为对大型水库生态状态的长期(50年)变化进行生物评估所需的最重要指标组的优先作用。对不同时间段内单个河段水生生物群落变化的多维轨迹进行了几何分析。在前海峡和下沉的洪泛区的纵向连续演替中,揭示了类似的尺虫群落的发育过程,而坎姆斯基河段和富营养化的Cheremshanskiy湾的类似结构特征则是特定的。考虑到将Chironomids作为对大型水库生态状态的长期(50年)变化进行生物评估所需的最重要指标组的优先作用。在前海峡和下沉的洪泛区的纵向连续演替中,揭示了类似的尺虫群落的发育过程,而坎姆斯基河段和富营养化的Cheremshanskiy湾的类似结构特征则是特定的。考虑到将Chironomids作为对大型水库生态状态的长期(50年)变化进行生物评估所需的最重要指标组的优先作用。在以前的河道和下沉的洪泛区的纵向连续演替过程中,揭示了类似的手足动物群落的发育过程,而坎斯基(Kamskiy)河段和富营养化的Cheremshanskiy湾的相似结构特征则是特定的。考虑到将Chironomids作为对大型水库生态状态的长期(50年)变化进行生物评估所需的最重要指标组的优先作用。

更新日期:2021-05-25
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