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Responses of phytoplankton functional groups to the hydrologic regime in the Daning River, a tributary of Three Gorges Reservoir, China
Zhu, Kongxian1,2; Bi, Yonghong1; Hu, Zhengyu1; Bi, YH (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.
2013-04-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume450Pages:169-177
AbstractDaning River is a deep tributary of Three Gorges Reservoir (TGR) in China, with water level fluctuations of 30 m annually. It was assumed that the hydrologic regime would be the main driving force in the self-assembling of the phytoplankton community in the river. In order to test this hypothesis, limnological study was performed monthly in the estuary, midstream and upstream of this tributary from May 2008 to April 2009. We identified 17 phytoplankton functional groups among 63 genera. These phytoplankton functional groups varied significantly, both seasonally and longitudinally. During the flood season (March-September), low water level and high inflows caused a marked increase in the turbidity, especially in the estuary and upstream, allowing functional group MP (the meroplanktonic diatoms) to dominate the phytoplankton community. Meanwhile, constant water level and high temperature led to the stability and thermal stratification in the midstream. These conditions resulted in a high phytoplankton biomass and the dominance of phytoplankton functional groups Y (Cryptomonas spp.) and Lo (motile Peridiniopsis niei and Peridinium) that were adapted to water stratification. During the dry season (October-February), although the inflows were low and water retention time was long, the thermal stratification was disrupted by the disturbance due to the impoundment of TGR, and the water column was deeply mixed. The phytoplankton biomass reduced and functional groups changed: group Lo declined, and group C (small diatom Cyclotella meneghiniana) increased in the estuary and midstream. Group Y replaced group MP to dominate the phytoplankton community in the upstream with the water becoming clear and stagnant. It could be deduced that the dynamics of phytoplankton in the Daning River were mainly influenced by hydrologic regime. (C) 2013 Elsevier B.V. All rights reserved,; Daning River is a deep tributary of Three Gorges Reservoir (TGR) in China, with water level fluctuations of 30 m annually. It was assumed that the hydrologic regime would be the main driving force in the self-assembling of the phytoplankton community in the river. In order to test this hypothesis, limnological study was performed monthly in the estuary, midstream and upstream of this tributary from May 2008 to April 2009. We identified 17 phytoplankton functional groups among 63 genera. These phytoplankton functional groups varied significantly, both seasonally and longitudinally. During the flood season (March-September), low water level and high inflows caused a marked increase in the turbidity, especially in the estuary and upstream, allowing functional group MP (the meroplanktonic diatoms) to dominate the phytoplankton community. Meanwhile, constant water level and high temperature led to the stability and thermal stratification in the midstream. These conditions resulted in a high phytoplankton biomass and the dominance of phytoplankton functional groups Y (Cryptomonas spp.) and Lo (motile Peridiniopsis niei and Peridinium) that were adapted to water stratification. During the dry season (October-February), although the inflows were low and water retention time was long, the thermal stratification was disrupted by the disturbance due to the impoundment of TGR, and the water column was deeply mixed. The phytoplankton biomass reduced and functional groups changed: group Lo declined, and group C (small diatom Cyclotella meneghiniana) increased in the estuary and midstream. Group Y replaced group MP to dominate the phytoplankton community in the upstream with the water becoming clear and stagnant. It could be deduced that the dynamics of phytoplankton in the Daning River were mainly influenced by hydrologic regime. (C) 2013 Elsevier B.V. All rights reserved,
SubtypeArticle
KeywordFunctional Groups Hydrologic Regime Mixing Regime Light Availability Longitudinal Difference
Department[Zhu, Kongxian ; Bi, Yonghong ; Hu, Zhengyu] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China ; [Zhu, Kongxian] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
DOI10.1016/j.scitotenv.2013.01.101
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationNational Natural Science Foundation of China [31123001]; National Basic Research Program of China [2008CB418000] ; National Natural Science Foundation of China [31123001]; National Basic Research Program of China [2008CB418000] ; National Natural Science Foundation of China [31123001]; National Basic Research Program of China [2008CB418000] ; National Natural Science Foundation of China [31123001]; National Basic Research Program of China [2008CB418000]
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000317879100019
WOS KeywordXIANGXI BAY ; SUBTROPICAL RESERVOIR ; ENVIRONMENTAL-FACTORS ; NUTRIENT LIMITATION ; SEASONAL-VARIATION ; STATE ; LAKES ; COMMUNITY ; DYNAMICS ; CYANOBACTERIAL
Funding OrganizationNational Natural Science Foundation of China [31123001]; National Basic Research Program of China [2008CB418000] ; National Natural Science Foundation of China [31123001]; National Basic Research Program of China [2008CB418000] ; National Natural Science Foundation of China [31123001]; National Basic Research Program of China [2008CB418000] ; National Natural Science Foundation of China [31123001]; National Basic Research Program of China [2008CB418000]
Citation statistics
Cited Times:57[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/19351
Collection藻类生物学及应用研究中心_期刊论文
Corresponding AuthorBi, YH (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Kongxian,Bi, Yonghong,Hu, Zhengyu,et al. Responses of phytoplankton functional groups to the hydrologic regime in the Daning River, a tributary of Three Gorges Reservoir, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2013,450:169-177.
APA Zhu, Kongxian,Bi, Yonghong,Hu, Zhengyu,&Bi, YH .(2013).Responses of phytoplankton functional groups to the hydrologic regime in the Daning River, a tributary of Three Gorges Reservoir, China.SCIENCE OF THE TOTAL ENVIRONMENT,450,169-177.
MLA Zhu, Kongxian,et al."Responses of phytoplankton functional groups to the hydrologic regime in the Daning River, a tributary of Three Gorges Reservoir, China".SCIENCE OF THE TOTAL ENVIRONMENT 450(2013):169-177.
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