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

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 a...

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Autores principales: Wei, Wei, Wang, Nannan, Cai, Lanlan, Zhang, Chuanlun, Jiao, Nianzhi, Zhang, Rui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6842343/
https://www.ncbi.nlm.nih.gov/pubmed/30972435
http://dx.doi.org/10.1007/s00248-019-01362-2
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author Wei, Wei
Wang, Nannan
Cai, Lanlan
Zhang, Chuanlun
Jiao, Nianzhi
Zhang, Rui
author_facet Wei, Wei
Wang, Nannan
Cai, Lanlan
Zhang, Chuanlun
Jiao, Nianzhi
Zhang, Rui
author_sort Wei, Wei
collection PubMed
description 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(6) viruses ml(−1), 7.98 ± 2.33 to 16.27 ± 2.85% h(−1) and 0.80 ± 0.23 to 3.74 ± 0.98% h(−1), 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. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s00248-019-01362-2) contains supplementary material, which is available to authorized users.
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spelling pubmed-68423432019-11-22 Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary Wei, Wei Wang, Nannan Cai, Lanlan Zhang, Chuanlun Jiao, Nianzhi Zhang, Rui Microb Ecol Environmental Microbiology 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(6) viruses ml(−1), 7.98 ± 2.33 to 16.27 ± 2.85% h(−1) and 0.80 ± 0.23 to 3.74 ± 0.98% h(−1), 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. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s00248-019-01362-2) contains supplementary material, which is available to authorized users. Springer US 2019-04-10 2019 /pmc/articles/PMC6842343/ /pubmed/30972435 http://dx.doi.org/10.1007/s00248-019-01362-2 Text en © The Author(s) 2019 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Environmental Microbiology
Wei, Wei
Wang, Nannan
Cai, Lanlan
Zhang, Chuanlun
Jiao, Nianzhi
Zhang, Rui
Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary
title Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary
title_full Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary
title_fullStr Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary
title_full_unstemmed Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary
title_short Impacts of Freshwater and Seawater Mixing on the Production and Decay of Virioplankton in a Subtropical Estuary
title_sort impacts of freshwater and seawater mixing on the production and decay of virioplankton in a subtropical estuary
topic Environmental Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6842343/
https://www.ncbi.nlm.nih.gov/pubmed/30972435
http://dx.doi.org/10.1007/s00248-019-01362-2
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