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Terrestrial Contributions to the Aquatic Food Web in the Middle Yangtze River

文献类型：期刊论文

作者Wang, Jianzhu; Gu, Binhe1; Huang, Jianhui2; Han, Xingguo3; Lin, Guanghui4; Zheng, Fawen5; Li, Yuncong6
刊名PLOS ONE
出版日期2014
卷号9期号:7
ISSN号1932-6203
DOI10.1371/journal.pone.0102473
文献子类Article
英文摘要Understanding the carbon sources supporting aquatic consumers in large rivers is essential for the protection of ecological integrity and for wildlife management. The relative importance of terrestrial and algal carbon to the aquatic food webs is still under intensive debate. The Yangtze River is the largest river in China and the third longest river in the world. The completion of the Three Gorges Dam (TGD) in 2003 has significantly altered the hydrological regime of the middle Yangtze River, but its immediate impact on carbon sources supporting the river food web is unknown. In this study, potential production sources from riparian and the main river channel, and selected aquatic consumers (invertebrates and fish) at an upstream constricted-channel site (Luoqi), a midstream estuarine site (Huanghua) and a near dam limnetic site (Maoping) of the TGD were collected for stable isotope (delta C-13 and delta N-15) and IsoSource analyses. Model estimates indicated that terrestrial plants were the dominant carbon sources supporting the consumer taxa at the three study sites. Algal production appeared to play a supplemental role in supporting consumer production. The contribution from C-4 plants was more important than that of C-3 plants at the upstream site while C-3 plants were the more important carbon source to the consumers at the two impacted sites (Huanghua and Maoping), particularly at the midstream site. There was no trend of increase in the contribution of autochthonous production from the upstream to the downstream sites as the flow rate decreased dramatically along the main river channel due to the construction of TGD. Our findings, along with recent studies in rivers and lakes, are contradictory to studies that demonstrate the importance of algal carbon in the aquatic food web. Differences in system geomorphology, hydrology, habitat heterogeneity, and land use may account for these contradictory findings reported in various studies.
学科主题Multidisciplinary Sciences
出版地SAN FRANCISCO
WOS关键词UPPER MISSISSIPPI RIVER ; THREE-GORGES DAM ; STABLE-ISOTOPES ; ORGANIC-MATTER ; FRESH-WATER ; ENERGY-SOURCES ; CARBON FLOW ; FISH ; FLOODPLAIN ; CONSERVATION
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000339558100034
出版者PUBLIC LIBRARY SCIENCE
资助机构National Natural Science Foundation of China (NSFC) [51179094, 30700091] ; Chinese Academy of Sciences ; NSFC [41376158] ; Key Project of Knowledge Innovation Direction Program [KSCX2-SW-109]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/27314]  
专题植被与环境变化国家重点实验室
作者单位1.Collaborat Innovat Ctr Geohazards & Ecoenvironm T, Yichang, Hubei Province, Peoples R China
2.Univ Florida, Soil & Water Sci Dept, Gainesville, FL 32611 USA
3.Chinese Acad Sci, Inst Bot, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
5.Tsinghua Univ, Ctr Earth Syst Sci, Beijing 100084, Peoples R China
6.Nanjing Res Inst Hydrol & Water Resources, Nanjing, Jiangsu, Peoples R China
7.Univ Florida, IFAS, Ctr Trop Res & Educ, Soil & Water Sci Dept, Homestead, FL 33031 USA
推荐引用方式
GB/T 7714		 Wang, Jianzhu,Gu, Binhe,Huang, Jianhui,et al. Terrestrial Contributions to the Aquatic Food Web in the Middle Yangtze River[J]. PLOS ONE,2014,9(7).
APA Wang, Jianzhu.,Gu, Binhe.,Huang, Jianhui.,Han, Xingguo.,Lin, Guanghui.,...&Li, Yuncong.(2014).Terrestrial Contributions to the Aquatic Food Web in the Middle Yangtze River.PLOS ONE,9(7).
MLA Wang, Jianzhu,et al."Terrestrial Contributions to the Aquatic Food Web in the Middle Yangtze River".PLOS ONE 9.7(2014).

入库方式： OAI收割

来源：植物研究所

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