Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary

Wei，Wei1,2; Wang，Nannan1,2; Cai，Lanlan2,3; Zhang，Chuanlun4; Jiao，Nianzhi2,3; Zhang，Rui2,3

2019

10.1007/s00248-019-01362-2

MICROBIAL ECOLOGY   影响因子和分区

0095-3628

1432-184X

Virioplankton is an important component of the aquatic ecosystem and plays multiple ecological and biogeochemical roles. Although the spatial and temporal distributions and dynamics of virioplankton have been well investigated in riverine and marine environments, little is known about the dynamics and environmental controlling mechanisms of virioplankton in estuaries. In this study, viral abundance, production and decay were examined in the Pearl River Estuary (PRE), one of the largest estuaries in China. The influences of freshwater and seawater mixing on viral ecological dynamics were evaluated with several cross-transplant experiments. In PRE, viral abundance, production and decay rates varied from 2.72 ± 0.09 to 27.5 ± 1.07 × 10 viruses ml, 7.98 ± 2.33 to 16.27 ± 2.85% h and 0.80 ± 0.23 to 3.74 ± 0.98% h, respectively. When the riverine and marine microbial community were transferred into simulated brackish water, viral production rates were markedly inhibited by 83.8% and 47.3%, respectively. The decay of riverine and marine virioplankton was inhibited by 21.1% and 34.2%, respectively, in simulated brackish water. These results indicate change of estuarine environmental factors significantly alters the dynamics of riverine and marine virioplankton. In addition, the effects of mixing on viral production and decay differed between high- and low-fluorescence viruses. High-fluorescence viruses seemed more resistant to decay than low-fluorescence viruses, whereas the production of marine low-fluorescence viruses seemed more resistant to inhibition than that of marine high-fluorescence viruses. Together, these results provide new insights into the ecological dynamics of virioplankton in estuarine environments.

Freshwater–seawater cross-transplants Pearl River estuary Viral decay Viral production

SCI

英语

其他

Qingdao National Laboratory for Marine Science and Technology[QNLM2016ORP0303]

Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Microbiology

Ecology ; Marine & Freshwater Biology ; Microbiology

WOS:000495294900006

SPRINGER

ENVIRONMENT/ECOLOGY

2-s2.0-85066247442

Scopus

1.College of the Environment and EcologyXiamen University,Xiamen,361102,China
2.State Key Laboratory of Marine Environmental ScienceInstitute of Marine Microbes and EcospheresXiamen University,Xiamen,361102,China
3.College of Ocean and Earth SciencesXiamen University,Xiamen,361102,China
4.Department of Ocean Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China

Wei，Wei,Wang，Nannan,Cai，Lanlan,et al. Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary[J]. MICROBIAL ECOLOGY,2019,78(4):843-854.

Wei，Wei,Wang，Nannan,Cai，Lanlan,Zhang，Chuanlun,Jiao，Nianzhi,&Zhang，Rui.(2019).Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary.MICROBIAL ECOLOGY,78(4),843-854.

Wei，Wei,et al."Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary".MICROBIAL ECOLOGY 78.4(2019):843-854.