Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China
Joint Authors
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-01-03
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
With the intensification of human activities over the past three decades in China, adverse effects on river ecosystem become more serious especially in the Hanjiang River.
Xiangyang site is an important spawn ground for four domestic fishes in the downstream region of Hanjiang River.
Based on the field survey results of macrophytes during 1997–2000 and 2013-2014, community succession of aquatic macrophytes at Xiangyang site was evaluated and discussed.
Two-key ecologic-related hydrologic characteristics, flow regime and water level, were identified as the main influence factors.
The EFC (environmental flow components) parameters were adopted to evaluate the alteration of flow regimes at Xiangyang site during 1941–2013.
Evaluation results demonstrate a highly altered flow process after being regulated by reservoir.
The flow patterns tend to be an attenuation process with no large floods occurring but a higher monthly low flow.
Furthermore, the water level decreased and fluctuation reduced after the dam was built, which caused the decrease of biomass but favored the submerged macrophytes during 1995–2009.
However, with the water level increasing after 2010 and gently fluctuating, due to uplift by the hydraulic projects downstream as well as the flow attenuation, the dominant position of submerged macrophytes will be weakened.
American Psychological Association (APA)
Yang, Na& Zhang, Yehui& Duan, Kai. 2017. Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China. Scientifica،Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1202609
Modern Language Association (MLA)
Yang, Na…[et al.]. Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China. Scientifica No. 2017 (2017), pp.1-10.
https://search.emarefa.net/detail/BIM-1202609
American Medical Association (AMA)
Yang, Na& Zhang, Yehui& Duan, Kai. Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China. Scientifica. 2017. Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1202609
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1202609