两座高水头大坝对中国乌江调节河段大型无脊椎动物群落的影响

IF 2.5 3区 环境科学与生态学 Q2 ECOLOGY Ecohydrology Pub Date : 2024-05-22 DOI:10.1002/eco.2659
Shiyun Chi, Juxiang Hu, Xianfu Zhao, Jun Hu, Sixin Li, Hongjun Wang, Lianfeng Zhou, Dewang Li
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引用次数: 0

摘要

本研究利用 2006 年至 2016 年的纵向监测数据,探讨了两座高水头大坝对中国乌江调节河段内大型无脊椎动物群落的影响。在这项研究中,我们设置了 10 个采样点,根据不同的压力因素将其分为四个区域,并根据大坝建设的时间表定义了三个阶段。我们的研究结果表明,大坝蓄水前后群落组成发生了重大变化。虽然某些原有的优势类群,如球花蜉蝣(Rivularia globosa)和卵形蜉蝣(Lithoglyphopsis ovatus),在各个阶段仍占优势,但在大坝下游,蜉蝣和笛鲷几乎消失。伴随着这一趋势的是适应性低的类群的消失和大坝下游耐受性强的类群的出现。此外,典型的湖沼学类群也在被淹没的河段定居。大坝蓄水不仅影响了大型无脊椎动物群落的组成,也影响了其多样性。在本研究中,由于距离有限,没有观察到大坝下游群落的恢复效果,但两座大坝上游的乌江渡大坝存在了 20 多年,这使我们相信,在大型河流系统中,如果与高水头大坝的距离足够长,高水头大坝下游的大型无脊椎动物群落可能会完全恢复。对于在大坝下游表现出极强适应性并繁衍生息的原始脆弱物种 R. globosa,今后应进行进一步研究。
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Impacts of two high-head dams on macroinvertebrate communities in the regulated river reaches of Wujiang River, China

The impact of two high-head dams on macroinvertebrate communities within the regulated reaches of the Wujiang River in China was explored, using longitudinal monitoring data spanning from 2006 to 2016. In this study, we set up 10 sampling sites categorized into four areas based on different stressors and defined three stages based on the timeline of dam construction. Our findings revealed significant changes in community composition before and after dam impoundment. While certain original dominant taxa, such as Rivularia globosa and Lithoglyphopsis ovatus, remained dominant throughout the stages, mayflies and caddisflies nearly vanished in the downstream reaches of the dams. This trend was accompanied by the disappearance of taxa with low adaptability and the emergence of tolerant taxa downstream of the dams. Additionally, typical limnological taxa colonized the inundated reaches. Dam impoundment affected not only macroinvertebrate community composition but also diversity. In this study, the recovery effect of communities downstream of dams was not observed due to the limited distance, but the presence of Wujiangdu Dam upstream of the two dams for over 20 years makes us believe that in a large river system, macroinvertebrate communities downstream of high-head dams may fully recover if the distance from the dams is long enough. The original and vulnerable species R. globosa, which demonstrated remarkable adaptability and thrived downstream of dams, should be further studied in the future.

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来源期刊
Ecohydrology
Ecohydrology 环境科学-生态学
CiteScore
5.10
自引率
7.70%
发文量
116
审稿时长
24 months
期刊介绍: Ecohydrology is an international journal publishing original scientific and review papers that aim to improve understanding of processes at the interface between ecology and hydrology and associated applications related to environmental management. Ecohydrology seeks to increase interdisciplinary insights by placing particular emphasis on interactions and associated feedbacks in both space and time between ecological systems and the hydrological cycle. Research contributions are solicited from disciplines focusing on the physical, ecological, biological, biogeochemical, geomorphological, drainage basin, mathematical and methodological aspects of ecohydrology. Research in both terrestrial and aquatic systems is of interest provided it explicitly links ecological systems and the hydrologic cycle; research such as aquatic ecological, channel engineering, or ecological or hydrological modelling is less appropriate for the journal unless it specifically addresses the criteria above. Manuscripts describing individual case studies are of interest in cases where broader insights are discussed beyond site- and species-specific results.
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