The Transition From Stochastic to Deterministic Bacterial Community Assembly During Permafrost Thaw Succession
The Northern high latitudes are warming twice as fast as the global average, and permafrost has become vulnerable to thaw. Changes to the environment during thaw leads to shifts in microbial communities and their associated functions, such as greenhouse gas emissions. Understanding the ecological pr...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2020-11-01
|
| Series: | Frontiers in Microbiology |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2020.596589/full |
| _version_ | 1828836847380332544 |
|---|---|
| author | Stacey Jarvis Doherty Stacey Jarvis Doherty Robyn A. Barbato A. Stuart Grandy W. Kelley Thomas Sylvain Monteux Ellen Dorrepaal Margareta Johansson Jessica G. Ernakovich Jessica G. Ernakovich |
| author_facet | Stacey Jarvis Doherty Stacey Jarvis Doherty Robyn A. Barbato A. Stuart Grandy W. Kelley Thomas Sylvain Monteux Ellen Dorrepaal Margareta Johansson Jessica G. Ernakovich Jessica G. Ernakovich |
| author_sort | Stacey Jarvis Doherty |
| collection | DOAJ |
| description | The Northern high latitudes are warming twice as fast as the global average, and permafrost has become vulnerable to thaw. Changes to the environment during thaw leads to shifts in microbial communities and their associated functions, such as greenhouse gas emissions. Understanding the ecological processes that structure the identity and abundance (i.e., assembly) of pre- and post-thaw communities may improve predictions of the functional outcomes of permafrost thaw. We characterized microbial community assembly during permafrost thaw using in situ observations and a laboratory incubation of soils from the Storflaket Mire in Abisko, Sweden, where permafrost thaw has occurred over the past decade. In situ observations indicated that bacterial community assembly was driven by randomness (i.e., stochastic processes) immediately after thaw with drift and dispersal limitation being the dominant processes. As post-thaw succession progressed, environmentally driven (i.e., deterministic) processes became increasingly important in structuring microbial communities where homogenizing selection was the only process structuring upper active layer soils. Furthermore, laboratory-induced thaw reflected assembly dynamics immediately after thaw indicated by an increase in drift, but did not capture the long-term effects of permafrost thaw on microbial community dynamics. Our results did not reflect a link between assembly dynamics and carbon emissions, likely because respiration is the product of many processes in microbial communities. Identification of dominant microbial community assembly processes has the potential to improve our understanding of the ecological impact of permafrost thaw and the permafrost–climate feedback. |
| first_indexed | 2024-12-12T18:29:20Z |
| format | Article |
| id | doaj.art-7ef3b27df26d4be9a3c0d3bfe3f3f076 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-12-12T18:29:20Z |
| publishDate | 2020-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-7ef3b27df26d4be9a3c0d3bfe3f3f0762022-12-22T00:15:57ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2020-11-011110.3389/fmicb.2020.596589596589The Transition From Stochastic to Deterministic Bacterial Community Assembly During Permafrost Thaw SuccessionStacey Jarvis Doherty0Stacey Jarvis Doherty1Robyn A. Barbato2A. Stuart Grandy3W. Kelley Thomas4Sylvain Monteux5Ellen Dorrepaal6Margareta Johansson7Jessica G. Ernakovich8Jessica G. Ernakovich9Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, United StatesCold Regions Research and Engineering Laboratory, Engineer Research Development Center, United States Army Corps of Engineers, Hanover, NH, United StatesCold Regions Research and Engineering Laboratory, Engineer Research Development Center, United States Army Corps of Engineers, Hanover, NH, United StatesDepartment of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United StatesDepartment of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, United StatesDepartment of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, SwedenClimate Impacts Research Centre, Department of Ecology and Environmental Sciences, Umeå University, Abisko, SwedenDepartment of Physical Geography and Ecosystem Science, Lund University, Lund, SwedenDepartment of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, United StatesDepartment of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United StatesThe Northern high latitudes are warming twice as fast as the global average, and permafrost has become vulnerable to thaw. Changes to the environment during thaw leads to shifts in microbial communities and their associated functions, such as greenhouse gas emissions. Understanding the ecological processes that structure the identity and abundance (i.e., assembly) of pre- and post-thaw communities may improve predictions of the functional outcomes of permafrost thaw. We characterized microbial community assembly during permafrost thaw using in situ observations and a laboratory incubation of soils from the Storflaket Mire in Abisko, Sweden, where permafrost thaw has occurred over the past decade. In situ observations indicated that bacterial community assembly was driven by randomness (i.e., stochastic processes) immediately after thaw with drift and dispersal limitation being the dominant processes. As post-thaw succession progressed, environmentally driven (i.e., deterministic) processes became increasingly important in structuring microbial communities where homogenizing selection was the only process structuring upper active layer soils. Furthermore, laboratory-induced thaw reflected assembly dynamics immediately after thaw indicated by an increase in drift, but did not capture the long-term effects of permafrost thaw on microbial community dynamics. Our results did not reflect a link between assembly dynamics and carbon emissions, likely because respiration is the product of many processes in microbial communities. Identification of dominant microbial community assembly processes has the potential to improve our understanding of the ecological impact of permafrost thaw and the permafrost–climate feedback.https://www.frontiersin.org/articles/10.3389/fmicb.2020.596589/fullpermafrost thawmicrobial communitycommunity assemblyphylogenetic null modelingecological processes |
| spellingShingle | Stacey Jarvis Doherty Stacey Jarvis Doherty Robyn A. Barbato A. Stuart Grandy W. Kelley Thomas Sylvain Monteux Ellen Dorrepaal Margareta Johansson Jessica G. Ernakovich Jessica G. Ernakovich The Transition From Stochastic to Deterministic Bacterial Community Assembly During Permafrost Thaw Succession Frontiers in Microbiology permafrost thaw microbial community community assembly phylogenetic null modeling ecological processes |
| title | The Transition From Stochastic to Deterministic Bacterial Community Assembly During Permafrost Thaw Succession |
| title_full | The Transition From Stochastic to Deterministic Bacterial Community Assembly During Permafrost Thaw Succession |
| title_fullStr | The Transition From Stochastic to Deterministic Bacterial Community Assembly During Permafrost Thaw Succession |
| title_full_unstemmed | The Transition From Stochastic to Deterministic Bacterial Community Assembly During Permafrost Thaw Succession |
| title_short | The Transition From Stochastic to Deterministic Bacterial Community Assembly During Permafrost Thaw Succession |
| title_sort | transition from stochastic to deterministic bacterial community assembly during permafrost thaw succession |
| topic | permafrost thaw microbial community community assembly phylogenetic null modeling ecological processes |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2020.596589/full |
| work_keys_str_mv | AT staceyjarvisdoherty thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT staceyjarvisdoherty thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT robynabarbato thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT astuartgrandy thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT wkelleythomas thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT sylvainmonteux thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT ellendorrepaal thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT margaretajohansson thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT jessicagernakovich thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT jessicagernakovich thetransitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT staceyjarvisdoherty transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT staceyjarvisdoherty transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT robynabarbato transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT astuartgrandy transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT wkelleythomas transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT sylvainmonteux transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT ellendorrepaal transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT margaretajohansson transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT jessicagernakovich transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession AT jessicagernakovich transitionfromstochastictodeterministicbacterialcommunityassemblyduringpermafrostthawsuccession |