Variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China

The freeze–thaw process of active layer can alter soil hydrothermal dynamics and plays an important role in the stability of permafrost ecosystem, particularly under the background of permafrost degradation resulting from climate warming. Wetlands in permafrost regions are considered to be symbiotic...

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Autores principales:	Xingfeng Dong, Chao Liu, Miao Li, Dalong Ma, Qiang Chen, Shuying Zang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Permafrost Freeze–thaw process Soil temperature Soil moisture Shrub swamp Forest swamp Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/fbc249959aad42cd9fe0a941858d1ef9
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spelling	oai:doaj.org-article:fbc249959aad42cd9fe0a941858d1ef92021-12-01T04:54:57ZVariations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China1470-160X10.1016/j.ecolind.2021.107880https://doaj.org/article/fbc249959aad42cd9fe0a941858d1ef92021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21005458https://doaj.org/toc/1470-160XThe freeze–thaw process of active layer can alter soil hydrothermal dynamics and plays an important role in the stability of permafrost ecosystem, particularly under the background of permafrost degradation resulting from climate warming. Wetlands in permafrost regions are considered to be symbiotic with permafrost. However, despite being the principal region of high-latitude permafrost in China, research on the freeze–thaw process in wetland in the Great Hing’an Mountains is limited. In this study, soil temperature and moisture data (from September 2018 to August 2020) collected from shrub and forest swamp observational sites in the Great Hing’an Mountains were used to analyze the freeze–thaw process and soil hydrothermal dynamics. The effect of wetland types on the freeze–thaw process and the coupling characteristics of soil temperature and moisture were discussed. The results demonstrated that the thawing process of active layer was unidirectional, while the freezing was bidirectional, and the thawing process took much longer than freezing process. The distribution of temperature and moisture of active layer varied in different stage of freeze–thaw process, yet similar trends were exhibited in different wetland types during the same freeze–thaw stage. The annual average temperature of forest swamp was higher than that of shrub swamp for all soil depths, while the annual average water content of forest swamp was lower than that of shrub swamp. A significant non-linear correlation was observed between moisture and temperature of each soil layer.Xingfeng DongChao LiuMiao LiDalong MaQiang ChenShuying ZangElsevierarticlePermafrostFreeze–thaw processSoil temperatureSoil moistureShrub swampForest swampEcologyQH540-549.5ENEcological Indicators, Vol 129, Iss , Pp 107880- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Permafrost Freeze–thaw process Soil temperature Soil moisture Shrub swamp Forest swamp Ecology QH540-549.5
spellingShingle	Permafrost Freeze–thaw process Soil temperature Soil moisture Shrub swamp Forest swamp Ecology QH540-549.5 Xingfeng Dong Chao Liu Miao Li Dalong Ma Qiang Chen Shuying Zang Variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China
description	The freeze–thaw process of active layer can alter soil hydrothermal dynamics and plays an important role in the stability of permafrost ecosystem, particularly under the background of permafrost degradation resulting from climate warming. Wetlands in permafrost regions are considered to be symbiotic with permafrost. However, despite being the principal region of high-latitude permafrost in China, research on the freeze–thaw process in wetland in the Great Hing’an Mountains is limited. In this study, soil temperature and moisture data (from September 2018 to August 2020) collected from shrub and forest swamp observational sites in the Great Hing’an Mountains were used to analyze the freeze–thaw process and soil hydrothermal dynamics. The effect of wetland types on the freeze–thaw process and the coupling characteristics of soil temperature and moisture were discussed. The results demonstrated that the thawing process of active layer was unidirectional, while the freezing was bidirectional, and the thawing process took much longer than freezing process. The distribution of temperature and moisture of active layer varied in different stage of freeze–thaw process, yet similar trends were exhibited in different wetland types during the same freeze–thaw stage. The annual average temperature of forest swamp was higher than that of shrub swamp for all soil depths, while the annual average water content of forest swamp was lower than that of shrub swamp. A significant non-linear correlation was observed between moisture and temperature of each soil layer.
format	article
author	Xingfeng Dong Chao Liu Miao Li Dalong Ma Qiang Chen Shuying Zang
author_facet	Xingfeng Dong Chao Liu Miao Li Dalong Ma Qiang Chen Shuying Zang
author_sort	Xingfeng Dong
title	Variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China
title_short	Variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China
title_full	Variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China
title_fullStr	Variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China
title_full_unstemmed	Variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China
title_sort	variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the great hing’an mountains, northeast china
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/fbc249959aad42cd9fe0a941858d1ef9
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Variations in active layer soil hydrothermal dynamics of typical wetlands in permafrost region in the Great Hing’an Mountains, northeast China

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