埃塞俄比亚中部凯达尔河回水浮游植物群落结构的时空变化

IF 1.1 4区 环境科学与生态学 Q3 MARINE & FRESHWATER BIOLOGY
Yadesa Chibsa, S. Mengistou, D. Kifle
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引用次数: 0

摘要

本研究评估了埃塞俄比亚中部凯达尔河(Ketar River)回水浮游植物群落在水质和大型植物覆盖方面的时空动态。在2017年12月至2018年11月的1年时间里,采集了沿江6个地点的浮游植物样本和理化信息。采用15 μm网眼采集浮游植物。共鉴定出3门藻类56种;藻类种类最多的门是硅藻门(35种),其次是绿藻门(13种)和裸藻门(8种)。硅藻类的丰度最高,占总浮游植物丰度的80.08%。下游的样地6的浮游植物种类丰度和多样性最高。存在藻门的物种多样性和丰度在时空上均存在显著差异。冗余分析结果显示,河流浮游植物的空间分布与pH、电导率、溶解氧和硝酸盐氮呈正相关,而水温与总悬浮物呈负相关。有机污染的一些指标表明,河流的水质正在逐步下降,值得密切监测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spatio-temporal variation in phytoplankton community structure in backwaters of the Ketar River, central Ethiopia
This study assessed the spatio-temporal dynamics of the phytoplankton community in backwaters of the Ketar River, central Ethiopia, in relation to water quality and macrophyte coverage. Phytoplankton samples and physicochemical information were collected at six sites along the river over 1 year (December 2017 to November 2018). Phytoplankton was collected using a 15-μm mesh net. A total of 56 species belonging to three algal phyla were identified; the most diverse phylum was Bacillariophyta (35 species), followed by Chlorophyta (13 species) and Euglenophyta (eight species). Bacillariophyta had the highest abundance and contributed 80.08% of the total phytoplankton abundance. Site 6 in the downstream portion had the highest abundance and greatest diversity of phytoplankton species. The algal phyla present showed significant differences in species diversity and abundance both spatially and temporally. Redundancy analysis results revealed that the spatial distribution of phytoplankton in the river positively correlated with pH, electrical conductivity, dissolved oxygen and nitrate-nitrogen, while water temperature and total suspended solids correlated negatively. Some indicators of organic pollution suggest that the water quality of the river is progressively declining, meriting close monitoring.
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来源期刊
African Journal of Aquatic Science
African Journal of Aquatic Science MARINE & FRESHWATER BIOLOGY-
CiteScore
3.90
自引率
7.10%
发文量
31
审稿时长
>12 weeks
期刊介绍: The African Journal of Aquatic Science is an international journal devoted to the study of the aquatic sciences, covering all African inland and estuarine waters. The Journal publishes peer-reviewed original scientific papers and short articles in all the aquatic science fields including limnology, hydrobiology, ecology, conservation, biomonitoring, management, water quality, ecotoxicology, biological interactions, physical properties and human impacts on African aquatic systems.
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