Luján河流域支流中城市化栖息地的特定指示无脊椎动物(阿根廷布宜诺斯艾利斯)

IF 0.9 4区 环境科学与生态学 Q4 LIMNOLOGY Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI:10.1051/limn/2021010
A. B. Fañani, L. Cibils-Martina, M. A. Casset, Bárbara Pamela Banegas, Teresita Inés Poretti, Luciana Rocha
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引用次数: 1

摘要

城市化地区的增加对河流和溪流产生干扰,其广泛影响降低了水质并威胁到水生生物群。本研究的目的是分析Luján河流域(阿根廷布宜诺斯艾利斯省)无脊椎动物群落在城市化梯度中的变化,并确定城市化栖息地的具体指示分类群。在Luján河流域选取9个样点,沿土地利用梯度分布。在每个采样点记录了水的物理化学变量,并在四个季节收集了无脊椎动物样本。主成分分析将具有不同城市化条件的三组地点分开:低(60%)。这些组在溶解氧、悬浮颗粒物和硝酸盐的浓度上存在差异。群落结构随城市化进程而变化,群落结构趋于简化,丰富度向盆地下游(中度城市化和高度城市化)方向降低。IndVal方法在城市化程度较低的生境中发现了3个指标类群(Heleobia sp. (Cochliopidae)、Uncancylus sp. (Ancylidae)和Callibaetis sp. (Baetidae)),在城市化程度中等的生境中发现了3个指标类群(Nematoda、Hyalella curvispina (hyalelliae)和Chironominae)。这些类群可用于识别城市化造成的不同扰动条件,为Luján流域水质诊断和监测提供了潜在的生物指标。
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Specific indicator invertebrates of urbanized habitats in tributary streams of the Luján River basin (Buenos Aires, Argentina)
The increase of urbanized areas produces disturbances in rivers and streams, and its widespread effects reduce water quality and threaten aquatic biota. The aim of this study was to analyze changes in the invertebrate communities of the Luján River basin (Buenos Aires Province, Argentina) in an urbanization gradient and to determine the specific indicator taxa of urbanized habitats. Nine sampling sites were selected in the Luján River basin, distributed along a land use gradient. At each sampling site physicochemical variables of water were recorded, and invertebrate samples were collected during four seasons. A Principal Component Analysis separated three groups of sites with different urbanization conditions: low (<15%), moderate (between 15% and 60%) and high urbanization (>60%). These groups showed differences in the concentration of dissolved oxygen, suspended particulate organic matter, and nitrates. The communities changed with urbanization conditions, with a simplification of the community composition and a decrease in richness towards the lower basin (moderate and high urbanization). The IndVal method found three indicator taxa for the low urbanization sites (Heleobia sp. (Cochliopidae), Uncancylus sp. (Ancylidae) and Callibaetis sp. (Baetidae)) and three for the moderate urbanization habitats (Nematoda, Hyalella curvispina (Hyalellidae) and Chironominae). These taxa were useful to identify different disturbance conditions due to urbanization, which makes them potential bioindicators in the diagnosis and monitoring of water quality in the Luján River basin.
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来源期刊
CiteScore
2.20
自引率
0.00%
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0
审稿时长
>12 weeks
期刊介绍: Annales de Limnologie - International Journal of Limnology publishes papers on the ecology of freshwater systems, ranging from studies of aquatic organisms, physical and chemical works which relate to the biological environment, to ecological applications and frameworks for water management directives. Main topics: Ecology of freshwater systems ; biodiversity, taxonomy, distribution patterns in space and time, biology of animals and plants ; experimental and conceptual studies which integrate laboratory and/or field work on physiology, population dynamics, biogeochemistry and nutrient dynamics, management, mathematical modelling ; techniques for sampling and chemical analyses, ecological applications, procedures which provide frameworks for environmental legislation.
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