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The spatial pattern of periphytic algae communities and its corresponding mechanism to environmental variables in the Weihe River Basin, China
Hydrology Research ( IF 2.7 ) Pub Date : 2020-08-14 , DOI: 10.2166/nh.2020.031
Yixin Liu 1 , Jiaxu Fu 1 , Dandong Cheng 1 , Qidong Lin 1 , Ping Su 1 , Xinxin Wang 1 , Haotian Sun 1
Affiliation  

Periphytic algae is a useful indicator of aquatic ecological conditions. We investigated the periphytic algae on natural substrate and the environmental variables at 44 sites on three river systems in the Weihe River Basin (WRB). A total of 84 species are identified, representing 37 genera. The most common genera were Navicula, Oscillatoria, Nitzschia, Scenedesmus, Cymbell, and Fragilaria. Oneway ANOVA indicated significant differences among the three river systems in environmental variables (p< 0.05). Non-metric multidimensional scaling (NMDS) analyses also showed differences in periphytic algae communities in the three river systems (p< 0.05) and identified different dominant species in each river system. Canonical correspondence analysis (CCA) and Monte Carlo permutation tests revealed that nutrient concentration, WT, and altitude were the most important variables affecting the structure and distribution of periphytic algae communities. Chemical variables were the most accounted for environmental variables (12.5%), while physical variable and geographical factors (5.8% in total) play a relevant minor role. Our results demonstrate that Navicula pupula, Navicula radiosq, Nitzschia palea, and Nitzschia denticula, exhibiting wide ecological amplitude, are tolerant of high concentrations of nutrient pollution. Variation of periphytic algae communities in WRB is due to the combination of anthropogenic and natural factors including agricultural and domestic wastes water inputting, land use patterns, geology, climatic changes, and river hydrology.

中文翻译:

渭河流域附生藻类群落空间格局及其与环境变量的对应机制

附生藻类是水生生态状况的有用指标。我们调查了渭河流域(WRB)三个河流系统44个地点的天然基质上的附生藻类和环境变量。共鉴定出84种,代表37属。最常见的属是 Navicula、Oscillatoria、Nitzschia、Scenedesmus、Cymbell 和 Fragilaria。Oneway ANOVA 表明三个河流系统在环境变量方面存在显着差异(p < 0.05)。非度量多维标度 (NMDS) 分析还显示三个河流系统中的附生藻类群落存在差异(p < 0.05),并确定每个河流系统中的不同优势物种。典型对应分析 (CCA) 和蒙特卡罗排列测试表明,养分浓度、WT、和海拔是影响附生藻类群落结构和分布的最重要变量。化学变量在环境变量中的占比最高(12.5%),而物理变量和地理因素(共 5.8%)起次要作用。我们的研究结果表明,Navicula pupula、Navicula radiosq、Nitzschia pleaa 和 Nitzschia denticula 表现出广泛的生态幅度,能够耐受高浓度的营养污染。WRB 中附生藻类群落的变化是由于人为和自然因素的结合,包括农业和生活废水输入、土地利用模式、地质、气候变化和河流水文。化学变量在环境变量中的占比最高(12.5%),而物理变量和地理因素(共 5.8%)起次要作用。我们的研究结果表明,Navicula pupula、Navicula radiosq、Nitzschiapalea 和 Nitzschia denticula 表现出广泛的生态幅度,能够耐受高浓度的营养污染。WRB 中附生藻类群落的变化是由于人为和自然因素的结合,包括农业和生活废水输入、土地利用模式、地质、气候变化和河流水文。化学变量在环境变量中的占比最高(12.5%),而物理变量和地理因素(共 5.8%)起次要作用。我们的研究结果表明,Navicula pupula、Navicula radiosq、Nitzschiapalea 和 Nitzschia denticula 表现出广泛的生态幅度,能够耐受高浓度的营养污染。WRB 中附生藻类群落的变化是由于人为和自然因素的结合,包括农业和生活废水输入、土地利用模式、地质、气候变化和河流水文。和 Nitzschia denticula 表现出广泛的生态幅度,能够耐受高浓度的营养污染。WRB 中附生藻类群落的变化是由于人为和自然因素的结合,包括农业和生活废水输入、土地利用模式、地质、气候变化和河流水文。和 Nitzschia denticula 表现出广泛的生态幅度,能够耐受高浓度的营养污染。WRB 中附生藻类群落的变化是由于人为和自然因素的结合,包括农业和生活废水输入、土地利用模式、地质、气候变化和河流水文。
更新日期:2020-08-14
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