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The microbial community in decaying fallen logs varies with critical period in an alpine forest
Little information has been available on the shifts in the microbial community in decaying fallen logs during critical periods in cold forests. Minjiang fir (Abies faxoniana) fallen logs in decay classes I-V were in situ incubated on the forest floor of an alpine forest in the eastern Tibet Plateau....
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5546723/ https://www.ncbi.nlm.nih.gov/pubmed/28787465 http://dx.doi.org/10.1371/journal.pone.0182576 |
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author | Chang, Chenhui Wu, Fuzhong Yang, Wanqin Xu, Zhenfeng Cao, Rui He, Wei Tan, Bo Justine, Meta Francis |
author_facet | Chang, Chenhui Wu, Fuzhong Yang, Wanqin Xu, Zhenfeng Cao, Rui He, Wei Tan, Bo Justine, Meta Francis |
author_sort | Chang, Chenhui |
collection | PubMed |
description | Little information has been available on the shifts in the microbial community in decaying fallen logs during critical periods in cold forests. Minjiang fir (Abies faxoniana) fallen logs in decay classes I-V were in situ incubated on the forest floor of an alpine forest in the eastern Tibet Plateau. The microbial community was investigated during the seasonal snow cover period (SP), snow thawing period (TP), early growing season (EG) and late growing season (LG) using Phosphorous Lipid Fatty Acid (PLFA) analysis. Total microbial biomass and microbial diversity in fallen logs were much more affected by critical period than decay class, whereas decay class had a stronger effect on microbial diversity than on microbial biomass. Abundant microbial biomass and microbial diversity in logs even without the cover of snow were observed in winter, which could not be linked to thermal insulation by snow cover. The freshly decayed logs functioned as an excellent buffer of environmental variation for microbial organisms during the sharp fluctuations in temperature in winter. We also found distinct decay patterns along with seasonality for heartwood, sapwood and bark, which requires further detailed research. Gram(-) bacteria mainly dominated the shifts in microbial community composition from SP to EG, while fungi and Gram(+) bacteria mainly dominated it from SP to TP. Based on previous work and the present study, we conclude that fallen logs on the forest floor alter ecological processes by influencing microbial communities on woody debris and beneath the soil and litter. Our study also emphasizes the need to maintain a number of fallen logs, especially fresh ones, on the forest floor. |
format | Online Article Text |
id | pubmed-5546723 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-55467232017-08-12 The microbial community in decaying fallen logs varies with critical period in an alpine forest Chang, Chenhui Wu, Fuzhong Yang, Wanqin Xu, Zhenfeng Cao, Rui He, Wei Tan, Bo Justine, Meta Francis PLoS One Research Article Little information has been available on the shifts in the microbial community in decaying fallen logs during critical periods in cold forests. Minjiang fir (Abies faxoniana) fallen logs in decay classes I-V were in situ incubated on the forest floor of an alpine forest in the eastern Tibet Plateau. The microbial community was investigated during the seasonal snow cover period (SP), snow thawing period (TP), early growing season (EG) and late growing season (LG) using Phosphorous Lipid Fatty Acid (PLFA) analysis. Total microbial biomass and microbial diversity in fallen logs were much more affected by critical period than decay class, whereas decay class had a stronger effect on microbial diversity than on microbial biomass. Abundant microbial biomass and microbial diversity in logs even without the cover of snow were observed in winter, which could not be linked to thermal insulation by snow cover. The freshly decayed logs functioned as an excellent buffer of environmental variation for microbial organisms during the sharp fluctuations in temperature in winter. We also found distinct decay patterns along with seasonality for heartwood, sapwood and bark, which requires further detailed research. Gram(-) bacteria mainly dominated the shifts in microbial community composition from SP to EG, while fungi and Gram(+) bacteria mainly dominated it from SP to TP. Based on previous work and the present study, we conclude that fallen logs on the forest floor alter ecological processes by influencing microbial communities on woody debris and beneath the soil and litter. Our study also emphasizes the need to maintain a number of fallen logs, especially fresh ones, on the forest floor. Public Library of Science 2017-08-07 /pmc/articles/PMC5546723/ /pubmed/28787465 http://dx.doi.org/10.1371/journal.pone.0182576 Text en © 2017 Chang et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Chang, Chenhui Wu, Fuzhong Yang, Wanqin Xu, Zhenfeng Cao, Rui He, Wei Tan, Bo Justine, Meta Francis The microbial community in decaying fallen logs varies with critical period in an alpine forest |
title | The microbial community in decaying fallen logs varies with critical period in an alpine forest |
title_full | The microbial community in decaying fallen logs varies with critical period in an alpine forest |
title_fullStr | The microbial community in decaying fallen logs varies with critical period in an alpine forest |
title_full_unstemmed | The microbial community in decaying fallen logs varies with critical period in an alpine forest |
title_short | The microbial community in decaying fallen logs varies with critical period in an alpine forest |
title_sort | microbial community in decaying fallen logs varies with critical period in an alpine forest |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5546723/ https://www.ncbi.nlm.nih.gov/pubmed/28787465 http://dx.doi.org/10.1371/journal.pone.0182576 |
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