Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Hindshaw, R. S., Lindsay, M. R., Boyd, E. S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6961512/
https://www.ncbi.nlm.nih.gov/pubmed/32009726
http://dx.doi.org/10.1007/s00300-017-2106-3
_version_ 1783488009724755968
author Hindshaw, R. S.
Lindsay, M. R.
Boyd, E. S.
author_facet Hindshaw, R. S.
Lindsay, M. R.
Boyd, E. S.
author_sort Hindshaw, R. S.
collection PubMed
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. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00300-017-2106-3) contains supplementary material, which is available to authorized users.
format Online
Article
Text
id pubmed-6961512
institution National Center for Biotechnology Information
language English
publishDate 2017
publisher Springer Berlin Heidelberg
record_format MEDLINE/PubMed
spelling pubmed-69615122020-01-29 Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard Hindshaw, R. S. Lindsay, M. R. Boyd, E. S. Polar Biol Original Paper 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. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00300-017-2106-3) contains supplementary material, which is available to authorized users. Springer Berlin Heidelberg 2017-03-31 2017 /pmc/articles/PMC6961512/ /pubmed/32009726 http://dx.doi.org/10.1007/s00300-017-2106-3 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Paper
Hindshaw, R. S.
Lindsay, M. R.
Boyd, E. S.
Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard
title 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_short Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard
title_sort diversity and abundance of microbial eukaryotes in stream sediments from svalbard
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6961512/
https://www.ncbi.nlm.nih.gov/pubmed/32009726
http://dx.doi.org/10.1007/s00300-017-2106-3
work_keys_str_mv AT hindshawrs diversityandabundanceofmicrobialeukaryotesinstreamsedimentsfromsvalbard
AT lindsaymr diversityandabundanceofmicrobialeukaryotesinstreamsedimentsfromsvalbard
AT boydes diversityandabundanceofmicrobialeukaryotesinstreamsedimentsfromsvalbard