Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography

To understand mechanisms linking ecosystem processes and microbial diversity in freshwater ecosystems, bacterial productivity and the metacommunity dynamics of species sorting and mass effects were investigated in an 18 ha headwater lake in northern Alaska. On most sampling dates, the phylogenetic c...

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Published in:Frontiers in Microbiology
Main Authors: Adams, Heather E., Crump, Byron C., Kling, George W.
Format: Text
Language:English
Published: Frontiers Media S.A. 2014
Subjects:
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3940886
http://www.ncbi.nlm.nih.gov/pubmed/24624127
https://doi.org/10.3389/fmicb.2014.00082
id ftpubmed:oai:pubmedcentral.nih.gov:3940886
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spelling ftpubmed:oai:pubmedcentral.nih.gov:3940886 2023-05-15T15:15:27+02:00 Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography Adams, Heather E. Crump, Byron C. Kling, George W. 2014-03-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3940886 http://www.ncbi.nlm.nih.gov/pubmed/24624127 https://doi.org/10.3389/fmicb.2014.00082 en eng Frontiers Media S.A. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3940886 http://www.ncbi.nlm.nih.gov/pubmed/24624127 http://dx.doi.org/10.3389/fmicb.2014.00082 Copyright © 2014 Adams, Crump and Kling. http://creativecommons.org/licenses/by/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. CC-BY Microbiology Text 2014 ftpubmed https://doi.org/10.3389/fmicb.2014.00082 2014-03-16T01:35:13Z To understand mechanisms linking ecosystem processes and microbial diversity in freshwater ecosystems, bacterial productivity and the metacommunity dynamics of species sorting and mass effects were investigated in an 18 ha headwater lake in northern Alaska. On most sampling dates, the phylogenetic composition of bacterial communities in inflowing streams (inlets) was strikingly different than that in the lake and the outflowing stream (outlet) (16S DGGE fingerprinting), demonstrating the shift in composition that occurs as these communities transit the lake. Outlet and downstream communities were also more productive than inlet and upstream communities (14C-leucine incorporation). Inlet bacteria transplanted to the outlet stream in dialysis bags were equally or less productive than control bacteria, suggesting that the inlet bacteria are capable of growing under lake conditions, but do not remain abundant because of species sorting in the lake. Outlet bacteria (representative of epilimnetic bacteria) transplanted to the inlet stream were less productive than control bacteria, suggesting that lake bacteria are not as well adapted to growing under inlet conditions. Based on water density, inlet stream water and bacteria generally entered the lake at the base of the epilimnion. However, during low to medium flow in the inlet stream the residence time of the epilimnion was too long relative to bacterial doubling times for these allochthonous bacteria to have a mass effect on the composition of outlet bacteria. The highest community similarity between inlet and outlet bacteria was detected after a large rain event in 2003, with over 61% similarity (average non-storm similarities were 39 ± 8%). While mass effects may be important during large storm events, species sorting appears to be the predominant mechanism structuring bacterial communities within the lake, leading to the assembly of a lake community that has lost some ability to function in stream habitats. Text Arctic Alaska PubMed Central (PMC) Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Frontiers in Microbiology 5
institution Open Polar
collection PubMed Central (PMC)
op_collection_id ftpubmed
language English
topic Microbiology
spellingShingle Microbiology
Adams, Heather E.
Crump, Byron C.
Kling, George W.
Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography
topic_facet Microbiology
description To understand mechanisms linking ecosystem processes and microbial diversity in freshwater ecosystems, bacterial productivity and the metacommunity dynamics of species sorting and mass effects were investigated in an 18 ha headwater lake in northern Alaska. On most sampling dates, the phylogenetic composition of bacterial communities in inflowing streams (inlets) was strikingly different than that in the lake and the outflowing stream (outlet) (16S DGGE fingerprinting), demonstrating the shift in composition that occurs as these communities transit the lake. Outlet and downstream communities were also more productive than inlet and upstream communities (14C-leucine incorporation). Inlet bacteria transplanted to the outlet stream in dialysis bags were equally or less productive than control bacteria, suggesting that the inlet bacteria are capable of growing under lake conditions, but do not remain abundant because of species sorting in the lake. Outlet bacteria (representative of epilimnetic bacteria) transplanted to the inlet stream were less productive than control bacteria, suggesting that lake bacteria are not as well adapted to growing under inlet conditions. Based on water density, inlet stream water and bacteria generally entered the lake at the base of the epilimnion. However, during low to medium flow in the inlet stream the residence time of the epilimnion was too long relative to bacterial doubling times for these allochthonous bacteria to have a mass effect on the composition of outlet bacteria. The highest community similarity between inlet and outlet bacteria was detected after a large rain event in 2003, with over 61% similarity (average non-storm similarities were 39 ± 8%). While mass effects may be important during large storm events, species sorting appears to be the predominant mechanism structuring bacterial communities within the lake, leading to the assembly of a lake community that has lost some ability to function in stream habitats.
format Text
author Adams, Heather E.
Crump, Byron C.
Kling, George W.
author_facet Adams, Heather E.
Crump, Byron C.
Kling, George W.
author_sort Adams, Heather E.
title Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography
title_short Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography
title_full Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography
title_fullStr Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography
title_full_unstemmed Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography
title_sort metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography
publisher Frontiers Media S.A.
publishDate 2014
url http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3940886
http://www.ncbi.nlm.nih.gov/pubmed/24624127
https://doi.org/10.3389/fmicb.2014.00082
long_lat ENVELOPE(-130.826,-130.826,57.231,57.231)
geographic Arctic
Arctic Lake
geographic_facet Arctic
Arctic Lake
genre Arctic
Alaska
genre_facet Arctic
Alaska
op_relation http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3940886
http://www.ncbi.nlm.nih.gov/pubmed/24624127
http://dx.doi.org/10.3389/fmicb.2014.00082
op_rights Copyright © 2014 Adams, Crump and Kling.
http://creativecommons.org/licenses/by/3.0/
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
op_rightsnorm CC-BY
op_doi https://doi.org/10.3389/fmicb.2014.00082
container_title Frontiers in Microbiology
container_volume 5
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