Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China
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 fi...
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| Language: | English |
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Wiley
2017-01-01
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| Series: | Scientifica |
| Online Access: | http://dx.doi.org/10.1155/2017/4083696 |
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| author | Na Yang Yehui Zhang Kai Duan |
| author_facet | Na Yang Yehui Zhang Kai Duan |
| author_sort | Na Yang |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-595d3da5236846169f52f1ca8ee1055f |
| institution | Kabale University |
| issn | 2090-908X |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
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| series | Scientifica |
| spelling | doaj-art-595d3da5236846169f52f1ca8ee1055f2025-02-03T01:06:45ZengWileyScientifica2090-908X2017-01-01201710.1155/2017/40836964083696Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, ChinaNa Yang0Yehui Zhang1Kai Duan2College of Hydrometeorology, Nanjing University of Information Science & Technology, Nanjing 210004, ChinaCollege of Hydrometeorology, Nanjing University of Information Science & Technology, Nanjing 210004, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan City 430072, ChinaWith 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.http://dx.doi.org/10.1155/2017/4083696 |
| spellingShingle | Na Yang Yehui Zhang Kai Duan Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China Scientifica |
| title | Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China |
| title_full | Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China |
| title_fullStr | Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China |
| title_full_unstemmed | Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China |
| title_short | Effect of Hydrologic Alteration on the Community Succession of Macrophytes at Xiangyang Site, Hanjiang River, China |
| title_sort | effect of hydrologic alteration on the community succession of macrophytes at xiangyang site hanjiang river china |
| url | http://dx.doi.org/10.1155/2017/4083696 |
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