Ecological Influences of Water-Level Fluctuation on Food Web Network

被引:8
作者
Que, Yanfu [1 ]
Xie, Jiayi [2 ]
Xu, Jun [2 ]
Li, Weitao [1 ]
Wang, Ezhou [1 ]
Zhu, Bin [1 ]
机构
[1] Minist Water Resources & Chinese Acad Sci, Inst Hydroecol, Key Lab Ecol Impacts Hydraul Projects & Restorat, Wuhan 430079, Peoples R China
[2] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
关键词
water-level fluctuation; food web; stable isotope; Bayesian isotope mixing model (BIMM); Three Gorges Reservoir; 3 GORGES RESERVOIR; TROPHIC POSITION; RIVER; FISH; SHIFTS; LAKES; BIODIVERSITY; FLOODPLAIN; ISOTOPES; THREATS;
D O I
10.3390/w13172371
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Seasonal water-level fluctuations may lead to changes in river nutrients, which causes corresponding changes in the trophic structure of an aquatic food web, and finally affects the whole ecosystem. In this study, we focused on the Ganjing River, a tributary of the Yangtze River, China. Common organisms were sampled and measured for carbon and nitrogen stable isotopes in the wet and dry seasons, respectively, and the relative contributions of different food sources were combined to construct the food web, so as to realize the influence of water-level fluctuation on aquatic food web. Our results showed that basal food sources for fish consumers were endogenous carbon sources such as POM, zooplankton and zoobenthos in the dry season, while high water level exposed fish to more diverse and abundant food sources, and the contribution proportions of exogenous carbon sources (e.g., terrestrial detritus) to consumers increased in the wet season. In parallel, the abundance and species diversity of fish were higher than those in the dry season. Most fish species had relatively higher trophic levels in the dry season compared to the wet season, because the increase in fish densities led to an increase in piscivores fish. The food web was composed of planktonic and benthic food chains in the dry season. During the wet season, the planktonic food chain was dominant, followed by the herbivorous food chain, and the benthic food chain was relatively less important. Therefore, water-level fluctuation may alter the trophic linkages within fish communities, which contributed to a more complex and interconnected food web. Moreover, as we expect, the stable isotope analysis food web was broadly in line with the gut content analysis food web.
引用
收藏
页数:13
相关论文
共 50 条
[41]   Influences of geothermal sulfur bacteria on a tropical coastal food web [J].
Pascal, Pierre-Yves ;
Dubois, Stanislas F. ;
Goffette, Anais ;
Lepoint, Gilles .
MARINE ECOLOGY PROGRESS SERIES, 2017, 578 :73-85
[42]   Characteristics of carbon, nitrogen and phosphorus release from dominant herbaceous plants in water-level fluctuation zone of the Three Gorges Reservoir [J].
Du, Li-Gang ;
Fang, Fang ;
Guo, Jin-Song ;
Gao, Hong-Tao ;
Wang, Chun-Ming ;
Li, Zhe .
2014, 27 (09) :1024-1031
[43]   Spatial variations of soil phosphorus forms and the risks of phosphorus release in the water-level fluctuation zone in a tributary of the Three Gorges Reservoir [J].
Wang, Chao ;
Fang, Fang ;
Yuan, Ziyue ;
Zhang, Rui ;
Zhang, Wei ;
Guo, Jinsong .
SCIENCE OF THE TOTAL ENVIRONMENT, 2020, 699
[44]   Hydrological Alterations Accelerate Soil Aggregate and Pore Structure Degradation in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China [J].
Nsabimana, Gratien ;
Bao, Yuhai ;
He, Xiubin ;
Nambajimana, Jean de Dieu ;
Segatagara, Bernard Musana ;
Khurram, Dil ;
Zhou, Ji .
LAND DEGRADATION & DEVELOPMENT, 2025,
[45]   Application of 210Pbex in elucidating contemporary sedimentary dynamics in the water-level fluctuation zone of the Three Gorges Reservoir, China [J].
Li, Jinlin ;
Bao, Yuhai ;
Wei, Jie ;
He, Xiubin ;
Zhang, Xinbao ;
Tang, Qiang ;
Wu, Shengjun ;
Huang, Ping ;
Li, Hong .
CATENA, 2023, 229
[46]   Water Level Fluctuation under the Impact of Lake Regulation and Ecological Implication in Huayang Lakes, China [J].
Fan, Zhongya ;
Wang, Zhong ;
Li, Yiping ;
Wang, Wencai ;
Tang, Chunyan ;
Zeng, Fantang .
WATER, 2020, 12 (03) :1-14
[47]   Exploring water-level fluctuation amplitude in an approach channel under the regulation of a dual cascade hydro-plant in the dry season [J].
Wan, Zhiyong ;
Li, Yun ;
An, Jianfeng ;
Wang, Xiaogang ;
Cheng, Long ;
Liao, Yipeng .
WATER SUPPLY, 2022, 22 (04) :4159-4175
[48]   Particle size differentiation explains flow regulation controls on sediment sorting in the water-level fluctuation zone of the Three Gorges Reservoir, China [J].
Tang, Qiang ;
Collins, Adrian L. ;
Wen, Anbang ;
He, Xiubin ;
Bao, Yuhai ;
Yan, Dongchun ;
Long, Yi ;
Zhang, Yusheng .
SCIENCE OF THE TOTAL ENVIRONMENT, 2018, 633 :1114-1125
[49]   Divergent patterns of soil phosphorus discharge from water-level fluctuation zone after full impoundment of Three Gorges Reservoir, China [J].
Jun Zhou ;
Yanhong Wu ;
Xiaoxiao Wang ;
Haijian Bing ;
Yang Chen ;
Hongyang Sun ;
Zhilin Zhong .
Environmental Science and Pollution Research, 2019, 26 :2559-2568
[50]   Effects of Herbaceous Plants on Methylmercury Net Production and Release From Sediment After Flooding in the Water-Level Fluctuation Zone of the Jialing River [J].
Liang, Li ;
Wang, Dingyong .
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY, 2022, 109 (05) :735-740