Ecological drivers of bacterial community assembly in synthetic phycospheres
In the nutrient-rich region surrounding marine phytoplankton cells, heterotrophic bacterioplankton transform a major fraction of recently fixed carbon through the uptake and catabolism of phytoplankton metabolites. We sought to understand the rules by which marine bacterial communities assemble in t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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National Academy of Sciences
2020
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| Online Access: | https://hdl.handle.net/1721.1/128219 |
| _version_ | 1826213443956375552 |
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| author | Fu, He Uchimiya, Mario Gore, Jeff Moran, Mary Ann |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Fu, He Uchimiya, Mario Gore, Jeff Moran, Mary Ann |
| author_sort | Fu, He |
| collection | MIT |
| description | In the nutrient-rich region surrounding marine phytoplankton cells, heterotrophic bacterioplankton transform a major fraction of recently fixed carbon through the uptake and catabolism of phytoplankton metabolites. We sought to understand the rules by which marine bacterial communities assemble in these nutrient-enhanced phycospheres, specifically addressing the role of host resources in driving community coalescence. Synthetic systems with varying combinations of known exometabolites of marine phytoplankton were inoculated with seawater bacterial assemblages, and communities were transferred daily to mimic the average duration of natural phycospheres. We found that bacterial community assembly was predictable from linear combinations of the taxa maintained on each individual metabolite in the mixture, weighted for the growth each supported. Deviations from this simple additive resource model were observed but also attributed to resource-based factors via enhanced bacterial growth when host metabolites were available concurrently. The ability of photosynthetic hosts to shape bacterial associates through excreted metabolites represents a mechanism by which microbiomes with beneficial effects on host growth could be recruited. In the surface ocean, resource-based assembly of host-associated communities may underpin the evolution and maintenance of microbial interactions and determine the fate of a substantial portion of Earth’s primary production. |
| first_indexed | 2024-09-23T15:49:18Z |
| format | Article |
| id | mit-1721.1/128219 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:49:18Z |
| publishDate | 2020 |
| publisher | National Academy of Sciences |
| record_format | dspace |
| spelling | mit-1721.1/1282192022-09-29T16:22:35Z Ecological drivers of bacterial community assembly in synthetic phycospheres Fu, He Uchimiya, Mario Gore, Jeff Moran, Mary Ann Massachusetts Institute of Technology. Department of Physics In the nutrient-rich region surrounding marine phytoplankton cells, heterotrophic bacterioplankton transform a major fraction of recently fixed carbon through the uptake and catabolism of phytoplankton metabolites. We sought to understand the rules by which marine bacterial communities assemble in these nutrient-enhanced phycospheres, specifically addressing the role of host resources in driving community coalescence. Synthetic systems with varying combinations of known exometabolites of marine phytoplankton were inoculated with seawater bacterial assemblages, and communities were transferred daily to mimic the average duration of natural phycospheres. We found that bacterial community assembly was predictable from linear combinations of the taxa maintained on each individual metabolite in the mixture, weighted for the growth each supported. Deviations from this simple additive resource model were observed but also attributed to resource-based factors via enhanced bacterial growth when host metabolites were available concurrently. The ability of photosynthetic hosts to shape bacterial associates through excreted metabolites represents a mechanism by which microbiomes with beneficial effects on host growth could be recruited. In the surface ocean, resource-based assembly of host-associated communities may underpin the evolution and maintenance of microbial interactions and determine the fate of a substantial portion of Earth’s primary production. Simons Foundation (Grant 542385) 2020-10-27T21:11:12Z 2020-10-27T21:11:12Z 2020-02 2019-10 2020-10-26T17:03:52Z Article http://purl.org/eprint/type/JournalArticle 0027-8424 1091-6490 https://hdl.handle.net/1721.1/128219 Fu, He et al. "Ecological drivers of bacterial community assembly in synthetic phycospheres." Proceedings of the National Academy of Sciences (February 2020): 3656-3662 © 2020 National Academy of Sciences en http://dx.doi.org/10.1073/pnas.1917265117 Proceedings of the National Academy of Sciences Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf National Academy of Sciences PNAS |
| spellingShingle | Fu, He Uchimiya, Mario Gore, Jeff Moran, Mary Ann Ecological drivers of bacterial community assembly in synthetic phycospheres |
| title | Ecological drivers of bacterial community assembly in synthetic phycospheres |
| title_full | Ecological drivers of bacterial community assembly in synthetic phycospheres |
| title_fullStr | Ecological drivers of bacterial community assembly in synthetic phycospheres |
| title_full_unstemmed | Ecological drivers of bacterial community assembly in synthetic phycospheres |
| title_short | Ecological drivers of bacterial community assembly in synthetic phycospheres |
| title_sort | ecological drivers of bacterial community assembly in synthetic phycospheres |
| url | https://hdl.handle.net/1721.1/128219 |
| work_keys_str_mv | AT fuhe ecologicaldriversofbacterialcommunityassemblyinsyntheticphycospheres AT uchimiyamario ecologicaldriversofbacterialcommunityassemblyinsyntheticphycospheres AT gorejeff ecologicaldriversofbacterialcommunityassemblyinsyntheticphycospheres AT moranmaryann ecologicaldriversofbacterialcommunityassemblyinsyntheticphycospheres |