Taxon interactions control the distributions of cryoconite bacteria colonizing a High Arctic ice cap

Abstract Microbial colonization of glacial ice surfaces incurs feedbacks which affect the melting rate of the ice surface. Ecosystems formed as microbe–mineral aggregates termed cryoconite locally reduce ice surface albedo and represent foci of biodiversity and biogeochemical cycling. Consequently,...

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Published in:Molecular Ecology
Main Authors: Gokul, Jarishma K., Hodson, Andrew J., Saetnan, Eli R., Irvine‐Fynn, Tristram D. L., Westall, Philippa J., Detheridge, Andrew P., Takeuchi, Nozomu, Bussell, Jennifer, Mur, Luis A. J., Edwards, Arwyn
Other Authors: Natural Environment Research Council, Great Britain Sasakawa Foundation, AU University Research Fund, Welsh Livery Guild scholarship, South African National Research Foundation Fellowship
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2016
Subjects:
Online Access:http://dx.doi.org/10.1111/mec.13715
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spelling crwiley:10.1111/mec.13715 2024-06-23T07:45:09+00:00 Taxon interactions control the distributions of cryoconite bacteria colonizing a High Arctic ice cap Gokul, Jarishma K. Hodson, Andrew J. Saetnan, Eli R. Irvine‐Fynn, Tristram D. L. Westall, Philippa J. Detheridge, Andrew P. Takeuchi, Nozomu Bussell, Jennifer Mur, Luis A. J. Edwards, Arwyn Natural Environment Research Council Great Britain Sasakawa Foundation Natural Environment Research Council AU University Research Fund Great Britain Sasakawa Foundation Welsh Livery Guild scholarship South African National Research Foundation Fellowship 2016 http://dx.doi.org/10.1111/mec.13715 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.13715 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.13715 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1 http://onlinelibrary.wiley.com/termsAndConditions Molecular Ecology volume 25, issue 15, page 3752-3767 ISSN 0962-1083 1365-294X journal-article 2016 crwiley https://doi.org/10.1111/mec.13715 2024-06-11T04:41:00Z Abstract Microbial colonization of glacial ice surfaces incurs feedbacks which affect the melting rate of the ice surface. Ecosystems formed as microbe–mineral aggregates termed cryoconite locally reduce ice surface albedo and represent foci of biodiversity and biogeochemical cycling. Consequently, greater understanding the ecological processes in the formation of functional cryoconite ecosystems upon glacier surfaces is sought. Here, we present the first bacterial biogeography of an ice cap, evaluating the respective roles of dispersal, environmental and biotic filtration occurring at local scales in the assembly of cryoconite microbiota. 16S rRNA gene amplicon semiconductor sequencing of cryoconite colonizing a Svalbard ice cap coupled with digital elevation modelling of physical parameters reveals the bacterial community is dominated by a ubiquitous core of generalist taxa, with evidence for a moderate pairwise distance–decay relationship. While geographic position and melt season duration are prominent among environmental predictors of community structure, the core population of taxa appears highly influential in structuring the bacterial community. Taxon co‐occurrence network analysis reveals a highly modular community structured by positive interactions with bottleneck taxa, predominantly Actinobacteria affiliated to isolates from soil humus. In contrast, the filamentous cyanobacterial taxon (assigned to Leptolyngbya/Phormidesmis pristleyi ) which dominates the community and binds together granular cryoconite are poorly connected to other taxa. While our study targeted one ice cap, the prominent role of generalist core taxa with close environmental relatives across the global cryosphere indicate discrete roles for cosmopolitan Actinobacteria and Cyanobacteria as respective keystone taxa and ecosystem engineers of cryoconite ecosystems colonizing ice caps. Article in Journal/Newspaper albedo Arctic glacier Ice cap Svalbard Wiley Online Library Arctic Svalbard Molecular Ecology 25 15 3752 3767
institution Open Polar
collection Wiley Online Library
op_collection_id crwiley
language English
description Abstract Microbial colonization of glacial ice surfaces incurs feedbacks which affect the melting rate of the ice surface. Ecosystems formed as microbe–mineral aggregates termed cryoconite locally reduce ice surface albedo and represent foci of biodiversity and biogeochemical cycling. Consequently, greater understanding the ecological processes in the formation of functional cryoconite ecosystems upon glacier surfaces is sought. Here, we present the first bacterial biogeography of an ice cap, evaluating the respective roles of dispersal, environmental and biotic filtration occurring at local scales in the assembly of cryoconite microbiota. 16S rRNA gene amplicon semiconductor sequencing of cryoconite colonizing a Svalbard ice cap coupled with digital elevation modelling of physical parameters reveals the bacterial community is dominated by a ubiquitous core of generalist taxa, with evidence for a moderate pairwise distance–decay relationship. While geographic position and melt season duration are prominent among environmental predictors of community structure, the core population of taxa appears highly influential in structuring the bacterial community. Taxon co‐occurrence network analysis reveals a highly modular community structured by positive interactions with bottleneck taxa, predominantly Actinobacteria affiliated to isolates from soil humus. In contrast, the filamentous cyanobacterial taxon (assigned to Leptolyngbya/Phormidesmis pristleyi ) which dominates the community and binds together granular cryoconite are poorly connected to other taxa. While our study targeted one ice cap, the prominent role of generalist core taxa with close environmental relatives across the global cryosphere indicate discrete roles for cosmopolitan Actinobacteria and Cyanobacteria as respective keystone taxa and ecosystem engineers of cryoconite ecosystems colonizing ice caps.
author2 Natural Environment Research Council
Great Britain Sasakawa Foundation
Natural Environment Research Council
AU University Research Fund
Great Britain Sasakawa Foundation
Welsh Livery Guild scholarship
South African National Research Foundation Fellowship
format Article in Journal/Newspaper
author Gokul, Jarishma K.
Hodson, Andrew J.
Saetnan, Eli R.
Irvine‐Fynn, Tristram D. L.
Westall, Philippa J.
Detheridge, Andrew P.
Takeuchi, Nozomu
Bussell, Jennifer
Mur, Luis A. J.
Edwards, Arwyn
spellingShingle Gokul, Jarishma K.
Hodson, Andrew J.
Saetnan, Eli R.
Irvine‐Fynn, Tristram D. L.
Westall, Philippa J.
Detheridge, Andrew P.
Takeuchi, Nozomu
Bussell, Jennifer
Mur, Luis A. J.
Edwards, Arwyn
Taxon interactions control the distributions of cryoconite bacteria colonizing a High Arctic ice cap
author_facet Gokul, Jarishma K.
Hodson, Andrew J.
Saetnan, Eli R.
Irvine‐Fynn, Tristram D. L.
Westall, Philippa J.
Detheridge, Andrew P.
Takeuchi, Nozomu
Bussell, Jennifer
Mur, Luis A. J.
Edwards, Arwyn
author_sort Gokul, Jarishma K.
title Taxon interactions control the distributions of cryoconite bacteria colonizing a High Arctic ice cap
title_short Taxon interactions control the distributions of cryoconite bacteria colonizing a High Arctic ice cap
title_full Taxon interactions control the distributions of cryoconite bacteria colonizing a High Arctic ice cap
title_fullStr Taxon interactions control the distributions of cryoconite bacteria colonizing a High Arctic ice cap
title_full_unstemmed Taxon interactions control the distributions of cryoconite bacteria colonizing a High Arctic ice cap
title_sort taxon interactions control the distributions of cryoconite bacteria colonizing a high arctic ice cap
publisher Wiley
publishDate 2016
url http://dx.doi.org/10.1111/mec.13715
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.13715
https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.13715
geographic Arctic
Svalbard
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Svalbard
genre albedo
Arctic
glacier
Ice cap
Svalbard
genre_facet albedo
Arctic
glacier
Ice cap
Svalbard
op_source Molecular Ecology
volume 25, issue 15, page 3752-3767
ISSN 0962-1083 1365-294X
op_rights http://onlinelibrary.wiley.com/termsAndConditions#vor
http://doi.wiley.com/10.1002/tdm_license_1
http://onlinelibrary.wiley.com/termsAndConditions
op_doi https://doi.org/10.1111/mec.13715
container_title Molecular Ecology
container_volume 25
container_issue 15
container_start_page 3752
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