Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard
Microbial eukaryotes are increasingly being recognised for their role in global biogeochemical cycles, yet very few studies have focussed on their distribution in high-latitude stream sediments, an important habitat which influences stream water nutrient chemistry. In this study, we present the firs...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/264465 2024-02-04T09:58:34+01:00 Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard Hindshaw, RS Lindsay, MR Boyd, ES 2017-03-31 application/pdf https://www.repository.cam.ac.uk/handle/1810/264465 https://doi.org/10.17863/CAM.9941 eng eng Springer http://dx.doi.org/10.1007/s00300-017-2106-3 Polar Biology https://www.repository.cam.ac.uk/handle/1810/264465 doi:10.17863/CAM.9941 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ eukarya Svalbard sediment glacier chemotrophy permafrost Article 2017 ftunivcam https://doi.org/10.17863/CAM.9941 2024-01-11T23:27:50Z Microbial eukaryotes are increasingly being recognised for their role in global biogeochemical cycles, yet very few studies have focussed on their distribution in high-latitude stream sediments, an important habitat which influences stream water nutrient chemistry. In this study, we present the first comparison of microbial eukaryotes from two different polar habitats by determining the abundance and taxonomic affiliation of 18S rRNA gene fragments recovered from four sediment samples in Svalbard: two from a glaciated catchment and two from an unglaciated permafrost-dominated catchment. Whilst there was no difference between the two catchments in terms of Rao’s phylogenetic diversity (0.18±0.04, 1SD), the glaciated catchment samples had slightly higher richness (138–139) than the unglaciated catchment samples (67–106). At the phylum level, Ciliophora had the highest relative abundance in the samples from the glaciated catchment (32–63%), but only comprised 0–17% of the unglaciated catchment samples. Bacillariophyta was the most abundant phylum in one of the samples from the unglaciated catchment (43%) but phototrophic microbial eukaryotes only formed a minor component of the glaciated catchment samples (<2%), suggesting that in these environments the microbial eukaryotes are predominantly heterotrophic (chemotrophic). This is in contrast to previously published data from Robertson Glacier, Canada where the relative abundance of chlorophyta (phototrophs) in three samples was 48–57%. The contrast may be due to differences in glacial hydrology and/or geology, highlighting the variation in microbial eukaryote communities between nominally similar environments. This research was funded by a Swiss National Science Foundation fellowship for prospective researchers PBEZP2-137335 and a Marie Curie Intra-European Fellowship (PIEFGA-2012-331501) to RSH. Fieldwork was supported by an Arctic Field Grant 219165/E10 (The Research Council of Norway) to RSH. ESB acknowledges support for this work from the NASA Astrobiology ... Article in Journal/Newspaper Arctic glacier glacier glacier* permafrost Svalbard Apollo - University of Cambridge Repository Arctic Svalbard Canada Norway Robertson Glacier ENVELOPE(165.383,165.383,-71.050,-71.050) |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
eukarya Svalbard sediment glacier chemotrophy permafrost |
spellingShingle |
eukarya Svalbard sediment glacier chemotrophy permafrost Hindshaw, RS Lindsay, MR Boyd, ES Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard |
topic_facet |
eukarya Svalbard sediment glacier chemotrophy permafrost |
description |
Microbial eukaryotes are increasingly being recognised for their role in global biogeochemical cycles, yet very few studies have focussed on their distribution in high-latitude stream sediments, an important habitat which influences stream water nutrient chemistry. In this study, we present the first comparison of microbial eukaryotes from two different polar habitats by determining the abundance and taxonomic affiliation of 18S rRNA gene fragments recovered from four sediment samples in Svalbard: two from a glaciated catchment and two from an unglaciated permafrost-dominated catchment. Whilst there was no difference between the two catchments in terms of Rao’s phylogenetic diversity (0.18±0.04, 1SD), the glaciated catchment samples had slightly higher richness (138–139) than the unglaciated catchment samples (67–106). At the phylum level, Ciliophora had the highest relative abundance in the samples from the glaciated catchment (32–63%), but only comprised 0–17% of the unglaciated catchment samples. Bacillariophyta was the most abundant phylum in one of the samples from the unglaciated catchment (43%) but phototrophic microbial eukaryotes only formed a minor component of the glaciated catchment samples (<2%), suggesting that in these environments the microbial eukaryotes are predominantly heterotrophic (chemotrophic). This is in contrast to previously published data from Robertson Glacier, Canada where the relative abundance of chlorophyta (phototrophs) in three samples was 48–57%. The contrast may be due to differences in glacial hydrology and/or geology, highlighting the variation in microbial eukaryote communities between nominally similar environments. This research was funded by a Swiss National Science Foundation fellowship for prospective researchers PBEZP2-137335 and a Marie Curie Intra-European Fellowship (PIEFGA-2012-331501) to RSH. Fieldwork was supported by an Arctic Field Grant 219165/E10 (The Research Council of Norway) to RSH. ESB acknowledges support for this work from the NASA Astrobiology ... |
format |
Article in Journal/Newspaper |
author |
Hindshaw, RS Lindsay, MR Boyd, ES |
author_facet |
Hindshaw, RS Lindsay, MR Boyd, ES |
author_sort |
Hindshaw, RS |
title |
Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard |
title_short |
Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard |
title_full |
Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard |
title_fullStr |
Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard |
title_full_unstemmed |
Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard |
title_sort |
diversity and abundance of microbial eukaryotes in stream sediments from svalbard |
publisher |
Springer |
publishDate |
2017 |
url |
https://www.repository.cam.ac.uk/handle/1810/264465 https://doi.org/10.17863/CAM.9941 |
long_lat |
ENVELOPE(165.383,165.383,-71.050,-71.050) |
geographic |
Arctic Svalbard Canada Norway Robertson Glacier |
geographic_facet |
Arctic Svalbard Canada Norway Robertson Glacier |
genre |
Arctic glacier glacier glacier* permafrost Svalbard |
genre_facet |
Arctic glacier glacier glacier* permafrost Svalbard |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/264465 doi:10.17863/CAM.9941 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.9941 |
_version_ |
1789963028732575744 |