Rapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period

Litter decomposition plays an important role in the nutrient cycle of terrestrial ecosystems. The alpine wetland has a high litter accumulation rate and a slow degradation rate, which is extremely sensitive to changeable freeze–thaw patterns against the background of global climate change. Freeze-th...

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Autores principales:	Mo Chen, Xinping Zhu, Chengyi Zhao, Pujia Yu, Maidinuer Abulaizi, Hongtao Jia
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Alpine wetland Freeze-thaw period Carex litter decomposition Microbial community evolution Bacteria Fungi Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/860390e6b3084a3296b03fb79b5b3776
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spelling	oai:doaj.org-article:860390e6b3084a3296b03fb79b5b37762021-12-01T04:37:37ZRapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period1470-160X10.1016/j.ecolind.2020.107180https://doaj.org/article/860390e6b3084a3296b03fb79b5b37762021-02-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20311195https://doaj.org/toc/1470-160XLitter decomposition plays an important role in the nutrient cycle of terrestrial ecosystems. The alpine wetland has a high litter accumulation rate and a slow degradation rate, which is extremely sensitive to changeable freeze–thaw patterns against the background of global climate change. Freeze-thaw process is a common natural phenomenon in middle-high latitudes and high altitudes. Hydrothermal changes caused by freezing and thawing process affect the survival and physiological characteristics of microorganisms, and then affect the decomposition process of litters. The alpine wetland could be an ideal example for wetland in high altitude to study the mechanism of microbial community structure and function during litter composition during freeze–thaw process. Moreover, seldom has research in the whole process in the fields. The bacterial and fungal communities were analyzed in three different Carex litter decomposition stages—fresh, four-, and six-month—during the freeze–thaw period using 16/18S rDNA pyrosequencing. Phyllosphere microflora had identified rapid changes in the structure and function. Bacteria were mainly influenced by environmental factors (air temperature, soil moisture), and were significantly related to the degradation of litter lignin and the change of C/N ratio. Fungi were affected by both litter quality and environmental factors, and were significantly related to the degradation of cellulose and the change of C/N ratio. Moreover, phyllosphere organisms, including bacteria (Cryobacterium and Paracoccus members) and fungi (Mrakia, Mrakiella, and Naganishia), were replaced by communities with specific metabolic capabilities to adapt to each particular decomposition stage. Ilumatobacter and the fungal genera, Mycosphaerella and Athelia were characteristic of four-month-old litter samples, whereas Brevundimonas, Paracoccus and Nigrospora were characteristic of six-month-old litter samples. Our results suggest that the bacterial community structures of Carex and forest litter during initial decomposition stages may be similar but that their fungal community structures may differ substantially.Mo ChenXinping ZhuChengyi ZhaoPujia YuMaidinuer AbulaiziHongtao JiaElsevierarticleAlpine wetlandFreeze-thaw periodCarex litter decompositionMicrobial community evolutionBacteriaFungiEcologyQH540-549.5ENEcological Indicators, Vol 121, Iss , Pp 107180- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Alpine wetland Freeze-thaw period Carex litter decomposition Microbial community evolution Bacteria Fungi Ecology QH540-549.5
spellingShingle	Alpine wetland Freeze-thaw period Carex litter decomposition Microbial community evolution Bacteria Fungi Ecology QH540-549.5 Mo Chen Xinping Zhu Chengyi Zhao Pujia Yu Maidinuer Abulaizi Hongtao Jia Rapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period
description	Litter decomposition plays an important role in the nutrient cycle of terrestrial ecosystems. The alpine wetland has a high litter accumulation rate and a slow degradation rate, which is extremely sensitive to changeable freeze–thaw patterns against the background of global climate change. Freeze-thaw process is a common natural phenomenon in middle-high latitudes and high altitudes. Hydrothermal changes caused by freezing and thawing process affect the survival and physiological characteristics of microorganisms, and then affect the decomposition process of litters. The alpine wetland could be an ideal example for wetland in high altitude to study the mechanism of microbial community structure and function during litter composition during freeze–thaw process. Moreover, seldom has research in the whole process in the fields. The bacterial and fungal communities were analyzed in three different Carex litter decomposition stages—fresh, four-, and six-month—during the freeze–thaw period using 16/18S rDNA pyrosequencing. Phyllosphere microflora had identified rapid changes in the structure and function. Bacteria were mainly influenced by environmental factors (air temperature, soil moisture), and were significantly related to the degradation of litter lignin and the change of C/N ratio. Fungi were affected by both litter quality and environmental factors, and were significantly related to the degradation of cellulose and the change of C/N ratio. Moreover, phyllosphere organisms, including bacteria (Cryobacterium and Paracoccus members) and fungi (Mrakia, Mrakiella, and Naganishia), were replaced by communities with specific metabolic capabilities to adapt to each particular decomposition stage. Ilumatobacter and the fungal genera, Mycosphaerella and Athelia were characteristic of four-month-old litter samples, whereas Brevundimonas, Paracoccus and Nigrospora were characteristic of six-month-old litter samples. Our results suggest that the bacterial community structures of Carex and forest litter during initial decomposition stages may be similar but that their fungal community structures may differ substantially.
format	article
author	Mo Chen Xinping Zhu Chengyi Zhao Pujia Yu Maidinuer Abulaizi Hongtao Jia
author_facet	Mo Chen Xinping Zhu Chengyi Zhao Pujia Yu Maidinuer Abulaizi Hongtao Jia
author_sort	Mo Chen
title	Rapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period
title_short	Rapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period
title_full	Rapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period
title_fullStr	Rapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period
title_full_unstemmed	Rapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period
title_sort	rapid microbial community evolution in initial carex litter decomposition stages in bayinbuluk alpine wetland during the freeze–thaw period
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/860390e6b3084a3296b03fb79b5b3776
work_keys_str_mv	AT mochen rapidmicrobialcommunityevolutionininitialcarexlitterdecompositionstagesinbayinbulukalpinewetlandduringthefreezethawperiod AT xinpingzhu rapidmicrobialcommunityevolutionininitialcarexlitterdecompositionstagesinbayinbulukalpinewetlandduringthefreezethawperiod AT chengyizhao rapidmicrobialcommunityevolutionininitialcarexlitterdecompositionstagesinbayinbulukalpinewetlandduringthefreezethawperiod AT pujiayu rapidmicrobialcommunityevolutionininitialcarexlitterdecompositionstagesinbayinbulukalpinewetlandduringthefreezethawperiod AT maidinuerabulaizi rapidmicrobialcommunityevolutionininitialcarexlitterdecompositionstagesinbayinbulukalpinewetlandduringthefreezethawperiod AT hongtaojia rapidmicrobialcommunityevolutionininitialcarexlitterdecompositionstagesinbayinbulukalpinewetlandduringthefreezethawperiod
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Rapid microbial community evolution in initial Carex litter decomposition stages in Bayinbuluk alpine wetland during the freeze–thaw period

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