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Sensitivity of Bacterioplankton to Environmental Disturbance: A Review of Baltic Sea Field Studies and Experiments
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. Swedish Meteorological and Hydrological Institute. (Ctr Ecol & Evolut Microbial Model Syst EEMiS)ORCID iD: 0000-0002-7120-4145
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. (Ctr Ecol & Evolut Microbial Model Syst EEMiS)ORCID iD: 0000-0002-6405-1347
2018 (English)In: Frontiers in Marine Science, E-ISSN 2296-7745, Vol. 5, p. 1-17, article id UNSP 361Article, review/survey (Refereed) Published
Abstract [en]

Bacterioplankton communities regulate energy and matter fluxes fundamental to all aquatic life. The Baltic Sea offers an outstanding ecosystem for interpreting causes and consequences of bacterioplankton community composition shifts resulting from environmental disturbance. Yet, a systematic synthesis of the composition of Baltic Sea bacterioplankton and their responses to natural or human-induced environmental perturbations is lacking. We review current research on Baltic Sea bacterioplankton dynamics in situ (48 articles) and in laboratory experiments (38 articles) carried out at a variety of spatiotemporal scales. In situ studies indicate that the salinity gradient sets the boundaries for bacterioplankton composition, whereas, regional environmental conditions at a within-basin scale, including the level of hypoxia and phytoplankton succession stages, may significantly tune the composition of bacterial communities. Also the experiments show that Baltic Sea bacteria are highly responsive to environmental conditions, with general influences of e.g. salinity, temperature and nutrients. Importantly, nine out of ten experiments that measured both bacterial community composition and some metabolic activities showed empirical support for the sensitivity scenario of bacteria - i.e., that environmental disturbance caused concomitant change in both community composition and community functioning. The lack of studies empirically testing the resilience scenario, i.e., experimental studies that incorporate the long-term temporal dimension, precludes conclusions about the potential prevalence of resilience of Baltic Sea bacterioplankton. We also outline outstanding questions emphasizing promising applications in incorporating bacterioplankton community dynamics into biogeochemical and food-web models and the lack of knowledge for deep-sea assemblages, particularly bacterioplankton structure-function relationships. This review emphasizes that bacterioplankton communities rapidly respond to natural and predicted human-induced environmental disturbance by altering their composition and metabolic activity. Unless bacterioplankton are resilient, such changes could have severe consequences for the regulation of microbial ecosystem services.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2018. Vol. 5, p. 1-17, article id UNSP 361
Keywords [en]
bacterial diversity, archaea, 16S rRNA, metabolic activity, ecosystem functioning, climate change
National Category
Ecology Microbiology
Research subject
Ecology, Microbiology
Identifiers
URN: urn:nbn:se:lnu:diva-80567DOI: 10.3389/fmars.2018.00361ISI: 000457522700001Scopus ID: 2-s2.0-85054645004OAI: oai:DiVA.org:lnu-80567DiVA, id: diva2:1289970
Available from: 2019-02-19 Created: 2019-02-19 Last updated: 2019-08-29Bibliographically approved

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Lindh, Markus V.Pinhassi, Jarone

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