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dc.contributor.authorAngermeyer, Angus  Concept link
dc.contributor.authorCrosby, Sarah C.  Concept link
dc.contributor.authorHuber, Julie A.  Concept link
dc.identifier.citationPeerJ 6 (2018): e4735en_US
dc.description© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in PeerJ 6 (2018): e4735, doi:10.7717/peerj.4735.en_US
dc.description.abstractDispersal and environmental selection are two of the most important factors that govern the distributions of microbial communities in nature. While dispersal rates are often inferred by measuring the degree to which community similarity diminishes with increasing geographic distance, determining the extent to which environmental selection impacts the distribution of microbes is more complex. To address this knowledge gap, we performed a large reciprocal transplant experiment to simulate the dispersal of US East Coast salt marsh Spartina alterniflora rhizome-associated microbial sediment communities across a latitudinal gradient and determined if any shifts in microbial community composition occurred as a result of the transplantation. Using bacterial 16S rRNA gene sequencing, we did not observe large-scale changes in community composition over a five-month S. alterniflora summer growing season and found that transplanted communities more closely resembled their origin sites than their destination sites. Furthermore, transplanted communities grouped predominantly by region, with two sites from the north and three sites to the south hosting distinct bacterial taxa, suggesting that sediment communities transplanted from north to south tended to retain their northern microbial distributions, and south to north maintained a southern distribution. A small number of potential indicator 16S rRNA gene sequences had distributions that were strongly correlated to both temperature and nitrogen, indicating that some organisms are more sensitive to environmental factors than others. These results provide new insight into the microbial biogeography of salt marsh sediments and suggest that established bacterial communities in frequently-inundated environments may be both highly resistant to invasion and resilient to some environmental shifts. However, the extent to which environmental selection impacts these communities is taxon specific and variable, highlighting the complex interplay between dispersal and environmental selection for microbial communities in nature.en_US
dc.description.sponsorshipThis research was conducted in the National Estuarine Research Reserve System under an award from the Estuarine Reserves Division, Office of Ocean and Coastal Resource Management, National Ocean Service, and National Oceanic and Atmospheric Administration. Support was also provided through funding to Julie Huber from a Brown-MBL Partnership SEED award, the Neal Cornell Endowed Research Fund, and the NSF Center for Dark Energy Biosphere Investigations (C-DEBI) (OCE-0939564). Additional funding was provided to Sarah Corman-Crosby by the National Park Service George Melendez Wright Climate Change Fellowship.en_US
dc.rightsAttribution 4.0 International*
dc.subjectMicrobial ecosystemsen_US
dc.subjectSalt marshen_US
dc.subjectReciprocal transplanten_US
dc.titleSalt marsh sediment bacterial communities maintain original population structure after transplantation across a latitudinal gradienten_US

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Attribution 4.0 International
Except where otherwise noted, this item's license is described as Attribution 4.0 International