10
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Phycosphere Microbial Succession Patterns and Assembly Mechanisms in a Marine Dinoflagellate Bloom

      research-article

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Disentangling the mechanisms shaping bacterioplankton communities during a marine ecological event is a core concern for ecologists. Harmful algal bloom (HAB) is a typical ecological disaster, and its formation is significantly influenced by alga-bacterium interactions. Microbial community shifts during the HAB process are relatively well known. However, the assembly processes of microbial communities in an HAB are not fully understood, especially the relative influences of deterministic and stochastic processes. We therefore analyzed the relative contributions of deterministic and stochastic processes during an HAB event. Both free-living and attached bacterial groups had a dramatic response to the HAB, and the relative importance of determinism versus stochasticity varied between the two bacterial groups at various bloom stages. Environmental factors and biotic interactions were the main drivers impacting the microbial shift process. Our results strengthen the understanding of the ecological mechanisms controlling microbial community patterns during the HAB process.

          ABSTRACT

          Given the ecological significance of microorganisms in algal blooming events, it is critical to understand the mechanisms regarding their distribution under different conditions. We tested the hypothesis that microbial community succession is strongly associated with algal bloom stages, and that the assembly mechanisms are cocontrolled by deterministic and stochastic processes. Community structures and underlying ecological processes of microbial populations (attached and free-living bacteria) at three algal bloom stages (pre-, during, and postbloom) over a complete dinoflagellate Scrippsiella trochoidea bloom were investigated. Both attached and free-living taxa had a strong response to the bloom event, and the latter was more sensitive than the former. The contribution of environmental parameters to microbial variability was 40.2%. Interaction analysis showed that complex positive or negative correlation networks exist in phycosphere microbes. These relationships were the potential drivers of mutualist and competitive interactions that impacted bacterial succession. Null model analysis showed that the attached bacterial community primarily exhibited deterministic processes at pre- and during-bloom stages, while dispersal-related processes contributed to a greater extent at the postbloom stage. In the free-living bacterial community, homogeneous selection and dispersal limitation dominated in the initial phase, which gave way to more deterministic processes at the two later stages. Relative contribution analyses further demonstrated that the community turnover of attached bacteria was mainly driven by environmental selection, while stochastic factors had partial effects on the assembly of free-living bacteria. Taken together, these data demonstrated that a robust link exists between bacterioplankton community structure and bloom progression, and phycosphere microbial succession trajectories are cogoverned by both deterministic and random processes.

          IMPORTANCE Disentangling the mechanisms shaping bacterioplankton communities during a marine ecological event is a core concern for ecologists. Harmful algal bloom (HAB) is a typical ecological disaster, and its formation is significantly influenced by alga-bacterium interactions. Microbial community shifts during the HAB process are relatively well known. However, the assembly processes of microbial communities in an HAB are not fully understood, especially the relative influences of deterministic and stochastic processes. We therefore analyzed the relative contributions of deterministic and stochastic processes during an HAB event. Both free-living and attached bacterial groups had a dramatic response to the HAB, and the relative importance of determinism versus stochasticity varied between the two bacterial groups at various bloom stages. Environmental factors and biotic interactions were the main drivers impacting the microbial shift process. Our results strengthen the understanding of the ecological mechanisms controlling microbial community patterns during the HAB process.

          Related collections

          Author and article information

          Contributors
          Role: Editor
          Journal
          Appl Environ Microbiol
          Appl. Environ. Microbiol
          aem
          aem
          AEM
          Applied and Environmental Microbiology
          American Society for Microbiology (1752 N St., N.W., Washington, DC )
          0099-2240
          1098-5336
          24 May 2019
          18 July 2019
          1 August 2019
          : 85
          : 15
          : e00349-19
          Affiliations
          [a ] Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, The Graduate School at Shenzhen, Tsinghua University, Guangdong Province, People’s Republic of China
          [b ] School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong Province, People’s Republic of China
          [c ] The Department of Life Science, Tsinghua University, Beijing, People’s Republic of China
          Nanjing Agricultural University
          Author notes
          Address correspondence to Zhong-Hua Cai, caizh@ 123456sz.tsinghua.edu.cn .

          J.Z. and G.-F.C. contributed equally to this work.

          Citation Zhou J, Chen G-F, Ying K-Z, Jin H, Song J-T, Cai Z-H. 2019. Phycosphere microbial succession patterns and assembly mechanisms in a marine dinoflagellate bloom. Appl Environ Microbiol 85:e00349-19. https://doi.org/10.1128/AEM.00349-19.

          Article
          PMC6643250 PMC6643250 6643250 00349-19
          10.1128/AEM.00349-19
          6643250
          31126952
          6331159e-8f62-4576-8417-1c3ac51c4ea9
          Copyright © 2019 American Society for Microbiology.

          All Rights Reserved.

          History
          : 10 February 2019
          : 25 April 2019
          Page count
          supplementary-material: 1, Figures: 8, Tables: 1, Equations: 0, References: 76, Pages: 17, Words: 10415
          Funding
          Funded by: National Natural Science Foundation of China (NSFC), https://doi.org/10.13039/501100001809;
          Award ID: 41476092
          Award Recipient :
          Funded by: National Natural Science Foundation of China (NSFC), https://doi.org/10.13039/501100001809;
          Award ID: 41741015
          Award Recipient :
          Categories
          Environmental Microbiology
          Custom metadata
          August 2019

          microbial community,coregulated,deterministic selection,random processes,dinoflagellate bloom,assembly profile

          Comments

          Comment on this article

          scite_
          41
          1
          20
          0
          Smart Citations
          41
          1
          20
          0
          Citing PublicationsSupportingMentioningContrasting
          View Citations

          See how this article has been cited at scite.ai

          scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.

          Similar content182

          Cited by16