DOI: 10.5194/hess-18-1073-2014
Scopus记录号: 2-s2.0-84897826870
论文题名: Dynamics of auto- and heterotrophic picoplankton and associated viruses in Lake Geneva
作者: Parvathi A ; , Zhong X ; , Ram A ; S ; P ; , Jacquet S
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 3 起始页码: 1073
结束页码: 1087
语种: 英语
Scopus关键词: Biological compartments
; Environmental parameter
; Microbial dynamics
; Microbial food web
; Phytoplankton abundances
; Primary production
; Transition period
; Vertical variation
; Bacteria
; Dynamics
; Lakes
; Plankton
; Viruses
; abundance
; bacterium
; food web
; interspecific interaction
; microbial activity
; mortality
; phytoplankton
; picoplankton
; population dynamics
; primary production
; statistical analysis
; temperature effect
; top-down control
; virus
; Lake Geneva
英文摘要: Microbial dynamics have rarely been investigated in Lake Geneva, known as the largest lake in western Europe. From a 5-month survey, we report dynamic patterns of free-living virus, bacteria and small phytoplankton abundances in response to a variety of environmental parameters. For the first time, we fractionated the primary production to separate the contribution of different size-related biological compartments and measured both bacterial and viral production in addition to experiments conducted to quantify the virus-induced bacterial mortality. We observed marked seasonal and vertical variations in picocyanobacteria, bacteria and virus abundances and production. The contribution of picoplankton and nanoplankton production to the total primary production was high (reaching up to 76% of total primary production) in November and the spring-summer transition period, respectively. The impact of viral lysis on both bacteria and picocyanobacteria was significantly higher than grazing activities. Virus-induced picocyanobacterial mortality reached up to 66% of cell removal compared to virus induced (heterotrophic) bacterial mortality, which reached a maximum of 34% in July. Statistical analyzes revealed that temperature and top-down control by viruses are among important factors regulating the picocyanobacterial dynamics in this lake. More generally speaking, our results add to the growing evidence and accepted view nowadays that viruses are an important actor of freshwater microbial dynamics and more globally of the functioning of the microbial food webs. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78295
Appears in Collections: 气候变化事实与影响
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作者单位: National Institute of Oceanography, Dr Salim Ali Road, P.O. Box 1913, 682018 Kochi, India; INRA, UMR042 CARRTEL, 75 Avenue de Corzent, 74203 Thonon-les-Bains cx, France; Laboratoire Microorganismes, Génome et Environnment, Clermont Université, Université Blaise Pascal, BP 80026, 63171 Aubière Cedex, France
Recommended Citation:
Parvathi A,, Zhong X,, Ram A,et al. Dynamics of auto- and heterotrophic picoplankton and associated viruses in Lake Geneva[J]. Hydrology and Earth System Sciences,2014-01-01,18(3)