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Short-term effects of temperature on the abundance and diversity of magnetotactic cocci
Temperature is one of the most important climate factors that can regulate the activity and growth of organisms. However, it is so far unclear how temperature influences the abundance and community composition of magnetotactic bacteria (MTB) that mineralize intracellular magnetite and/or greigite ma...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Blackwell Publishing Inc
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3426400/ https://www.ncbi.nlm.nih.gov/pubmed/22950012 http://dx.doi.org/10.1002/mbo3.7 |
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author | Lin, Wei Wang, Yinzhao Pan, Yongxin |
author_facet | Lin, Wei Wang, Yinzhao Pan, Yongxin |
author_sort | Lin, Wei |
collection | PubMed |
description | Temperature is one of the most important climate factors that can regulate the activity and growth of organisms. However, it is so far unclear how temperature influences the abundance and community composition of magnetotactic bacteria (MTB) that mineralize intracellular magnetite and/or greigite magnetosomes and play significant roles in the global iron cycling and sediment magnetization. To address this specific problem, in this study we have assessed the impact of temperature on freshwater magnetotactic cocci through laboratory microcosm simulations. Microcosms containing MTB were exposed to four constant temperatures ranging from 9°C to 37°C. After 10 days and 28 days of incubation, no significant differences in abundance were detected in microcosms at 9°C, 15°C, and 26°C (Student's t-test, P > 0.05); however, microcosms exposed to 37°C exhibited a significant decrease of magnetotactic cocci abundance (P < 0.05). Dendrogram analysis of community-amplified ribosomal DNA restriction analysis (community ARDRA) banding patterns distinguished the 37°C samples from samples at lower temperatures regardless of incubation periods. Furthermore, clone library analysis revealed that most of the operational taxonomic units (OTUs) detected in samples from 9°C to 26°C were absent from the 37°C microcosms, whereas six OTUs were exclusively detected in the 37°C samples. Community compositions from four incubation temperatures were further compared using statistical phylogenetic methods (UniFrac and LIBSHUFF), which revealed that the 37°C samples harbored phylogenetically distinct MTB communities compared to those found in 9°C, 15°C, and 26°C samples. Taken together, our results indicate that elevated temperature can influence the abundance and diversity of dominant members of magnetotactic cocci. This linkage further infers that the abundance and diversity of MTB (e.g., based on the fossil magnetosomes) may be useful in reconstruction of paleotemperature. |
format | Online Article Text |
id | pubmed-3426400 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Blackwell Publishing Inc |
record_format | MEDLINE/PubMed |
spelling | pubmed-34264002012-08-29 Short-term effects of temperature on the abundance and diversity of magnetotactic cocci Lin, Wei Wang, Yinzhao Pan, Yongxin Microbiologyopen Original Research Temperature is one of the most important climate factors that can regulate the activity and growth of organisms. However, it is so far unclear how temperature influences the abundance and community composition of magnetotactic bacteria (MTB) that mineralize intracellular magnetite and/or greigite magnetosomes and play significant roles in the global iron cycling and sediment magnetization. To address this specific problem, in this study we have assessed the impact of temperature on freshwater magnetotactic cocci through laboratory microcosm simulations. Microcosms containing MTB were exposed to four constant temperatures ranging from 9°C to 37°C. After 10 days and 28 days of incubation, no significant differences in abundance were detected in microcosms at 9°C, 15°C, and 26°C (Student's t-test, P > 0.05); however, microcosms exposed to 37°C exhibited a significant decrease of magnetotactic cocci abundance (P < 0.05). Dendrogram analysis of community-amplified ribosomal DNA restriction analysis (community ARDRA) banding patterns distinguished the 37°C samples from samples at lower temperatures regardless of incubation periods. Furthermore, clone library analysis revealed that most of the operational taxonomic units (OTUs) detected in samples from 9°C to 26°C were absent from the 37°C microcosms, whereas six OTUs were exclusively detected in the 37°C samples. Community compositions from four incubation temperatures were further compared using statistical phylogenetic methods (UniFrac and LIBSHUFF), which revealed that the 37°C samples harbored phylogenetically distinct MTB communities compared to those found in 9°C, 15°C, and 26°C samples. Taken together, our results indicate that elevated temperature can influence the abundance and diversity of dominant members of magnetotactic cocci. This linkage further infers that the abundance and diversity of MTB (e.g., based on the fossil magnetosomes) may be useful in reconstruction of paleotemperature. Blackwell Publishing Inc 2012-03 /pmc/articles/PMC3426400/ /pubmed/22950012 http://dx.doi.org/10.1002/mbo3.7 Text en © 2012 The Authors. Published by Blackwell Publishing Ltd. http://creativecommons.org/licenses/by/2.5/ This is an open access article under the terms of the Creative Commons Attribution Non Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
spellingShingle | Original Research Lin, Wei Wang, Yinzhao Pan, Yongxin Short-term effects of temperature on the abundance and diversity of magnetotactic cocci |
title | Short-term effects of temperature on the abundance and diversity of magnetotactic cocci |
title_full | Short-term effects of temperature on the abundance and diversity of magnetotactic cocci |
title_fullStr | Short-term effects of temperature on the abundance and diversity of magnetotactic cocci |
title_full_unstemmed | Short-term effects of temperature on the abundance and diversity of magnetotactic cocci |
title_short | Short-term effects of temperature on the abundance and diversity of magnetotactic cocci |
title_sort | short-term effects of temperature on the abundance and diversity of magnetotactic cocci |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3426400/ https://www.ncbi.nlm.nih.gov/pubmed/22950012 http://dx.doi.org/10.1002/mbo3.7 |
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