Characterization of the bacterial communities on recent Icelandic volcanic deposits of different ages
Abstract Background Basalt is the most common igneous rock on the Earth’s surface covering. Basalt-associated microorganisms drive the cycling and sequestration of different elements such as nitrogen, carbon and other nutrients, which facilitate subsequent pioneer and plant development, impacting lo...
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ftdoajarticles:oai:doaj.org/article:d0bc901ff41c4a7dbd20d6ec882609c4 2023-05-15T16:49:09+02:00 Characterization of the bacterial communities on recent Icelandic volcanic deposits of different ages Bo Byloos Pieter Monsieurs Mohamed Mysara Natalie Leys Nico Boon Rob Van Houdt 2018-09-01T00:00:00Z https://doi.org/10.1186/s12866-018-1262-0 https://doaj.org/article/d0bc901ff41c4a7dbd20d6ec882609c4 EN eng BMC http://link.springer.com/article/10.1186/s12866-018-1262-0 https://doaj.org/toc/1471-2180 doi:10.1186/s12866-018-1262-0 1471-2180 https://doaj.org/article/d0bc901ff41c4a7dbd20d6ec882609c4 BMC Microbiology, Vol 18, Iss 1, Pp 1-11 (2018) Basalt Lava Krafla Iceland Chronosequence 16S rRNA gene amplicon sequencing Microbiology QR1-502 article 2018 ftdoajarticles https://doi.org/10.1186/s12866-018-1262-0 2022-12-31T13:43:46Z Abstract Background Basalt is the most common igneous rock on the Earth’s surface covering. Basalt-associated microorganisms drive the cycling and sequestration of different elements such as nitrogen, carbon and other nutrients, which facilitate subsequent pioneer and plant development, impacting long-term regulation of the Earth’s temperature and biosphere. The initial processes of colonization and subsequent rock weathering by microbial communities are still poorly understood and relatively few data are available on the diversity and richness of the communities inhabiting successive and chronological lava flows. In this study, the bacterial communities present on lava deposits from different eruptions of the 1975–84 Krafla Fires (32-, 35- and 39-year old, respectively) at the Krafla, Iceland, were determined. Results Three sites were sampled for each deposit (32-, 35- and 39-year old), two proximal sites (at 10 m distance) and one more distant site (at 100 m from the two other sites). The determined chemical composition and metal concentrations were similar for the three basalt deposits. No significant differences were observed in the total number of cells in each flow. 16S rRNA gene amplicon sequencing showed that the most abundant classified phylum across the 3 flows was Proteobacteria, although predominance of Acidobacteria, Actinobacteria and Firmicutes was observed for some sampling sites. In addition, a considerable fraction of the operational taxonomic units remained unclassified. Alpha diversity (Shannon, inverse Simpson and Chao), HOMOVA and AMOVA only showed a significant difference for Shannon between the 32- and 39-year old flow (p < 0.05). Nonmetric multidimensional scaling (NMDS) analysis showed that age significantly (p = 0.026) influenced the leftward movement along NMDS axis 1. Conclusions Although NMDS indicated that the (relatively small) age difference of the deposits appeared to impact the bacterial community, this analysis was not consistent with AMOVA and HOMOVA, indicating no ... Article in Journal/Newspaper Iceland Directory of Open Access Journals: DOAJ Articles Krafla ENVELOPE(-16.747,-16.747,65.713,65.713) BMC Microbiology 18 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Basalt Lava Krafla Iceland Chronosequence 16S rRNA gene amplicon sequencing Microbiology QR1-502 |
spellingShingle |
Basalt Lava Krafla Iceland Chronosequence 16S rRNA gene amplicon sequencing Microbiology QR1-502 Bo Byloos Pieter Monsieurs Mohamed Mysara Natalie Leys Nico Boon Rob Van Houdt Characterization of the bacterial communities on recent Icelandic volcanic deposits of different ages |
topic_facet |
Basalt Lava Krafla Iceland Chronosequence 16S rRNA gene amplicon sequencing Microbiology QR1-502 |
description |
Abstract Background Basalt is the most common igneous rock on the Earth’s surface covering. Basalt-associated microorganisms drive the cycling and sequestration of different elements such as nitrogen, carbon and other nutrients, which facilitate subsequent pioneer and plant development, impacting long-term regulation of the Earth’s temperature and biosphere. The initial processes of colonization and subsequent rock weathering by microbial communities are still poorly understood and relatively few data are available on the diversity and richness of the communities inhabiting successive and chronological lava flows. In this study, the bacterial communities present on lava deposits from different eruptions of the 1975–84 Krafla Fires (32-, 35- and 39-year old, respectively) at the Krafla, Iceland, were determined. Results Three sites were sampled for each deposit (32-, 35- and 39-year old), two proximal sites (at 10 m distance) and one more distant site (at 100 m from the two other sites). The determined chemical composition and metal concentrations were similar for the three basalt deposits. No significant differences were observed in the total number of cells in each flow. 16S rRNA gene amplicon sequencing showed that the most abundant classified phylum across the 3 flows was Proteobacteria, although predominance of Acidobacteria, Actinobacteria and Firmicutes was observed for some sampling sites. In addition, a considerable fraction of the operational taxonomic units remained unclassified. Alpha diversity (Shannon, inverse Simpson and Chao), HOMOVA and AMOVA only showed a significant difference for Shannon between the 32- and 39-year old flow (p < 0.05). Nonmetric multidimensional scaling (NMDS) analysis showed that age significantly (p = 0.026) influenced the leftward movement along NMDS axis 1. Conclusions Although NMDS indicated that the (relatively small) age difference of the deposits appeared to impact the bacterial community, this analysis was not consistent with AMOVA and HOMOVA, indicating no ... |
format |
Article in Journal/Newspaper |
author |
Bo Byloos Pieter Monsieurs Mohamed Mysara Natalie Leys Nico Boon Rob Van Houdt |
author_facet |
Bo Byloos Pieter Monsieurs Mohamed Mysara Natalie Leys Nico Boon Rob Van Houdt |
author_sort |
Bo Byloos |
title |
Characterization of the bacterial communities on recent Icelandic volcanic deposits of different ages |
title_short |
Characterization of the bacterial communities on recent Icelandic volcanic deposits of different ages |
title_full |
Characterization of the bacterial communities on recent Icelandic volcanic deposits of different ages |
title_fullStr |
Characterization of the bacterial communities on recent Icelandic volcanic deposits of different ages |
title_full_unstemmed |
Characterization of the bacterial communities on recent Icelandic volcanic deposits of different ages |
title_sort |
characterization of the bacterial communities on recent icelandic volcanic deposits of different ages |
publisher |
BMC |
publishDate |
2018 |
url |
https://doi.org/10.1186/s12866-018-1262-0 https://doaj.org/article/d0bc901ff41c4a7dbd20d6ec882609c4 |
long_lat |
ENVELOPE(-16.747,-16.747,65.713,65.713) |
geographic |
Krafla |
geographic_facet |
Krafla |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
BMC Microbiology, Vol 18, Iss 1, Pp 1-11 (2018) |
op_relation |
http://link.springer.com/article/10.1186/s12866-018-1262-0 https://doaj.org/toc/1471-2180 doi:10.1186/s12866-018-1262-0 1471-2180 https://doaj.org/article/d0bc901ff41c4a7dbd20d6ec882609c4 |
op_doi |
https://doi.org/10.1186/s12866-018-1262-0 |
container_title |
BMC Microbiology |
container_volume |
18 |
container_issue |
1 |
_version_ |
1766039244316344320 |