Response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the Shule River Basin
Permafrost degradation exhibits striking and profound influences on the alpine ecosystem, and response characteristics of vegetation and soil environment to such degradation inevitably differ during the entire degraded periods. However, up to now, the related research is lacking in the Qinghai–Tibet...
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2012
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ftdoajarticles:oai:doaj.org/article:0e6b7dc8885c46a495fc3f5af4777dd5 2023-09-05T13:11:10+02:00 Response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the Shule River Basin Shengyun Chen Wenjie Liu Xiang Qin Yushuo Liu Tongzuo Zhang Kelong Chen Fengzu Hu Jiawen Ren Dahe Qin 2012-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/7/4/045406 https://doaj.org/article/0e6b7dc8885c46a495fc3f5af4777dd5 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/7/4/045406 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/7/4/045406 1748-9326 https://doaj.org/article/0e6b7dc8885c46a495fc3f5af4777dd5 Environmental Research Letters, Vol 7, Iss 4, p 045406 (2012) vegetation characteristics soil environment permafrost degradation Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2012 ftdoajarticles https://doi.org/10.1088/1748-9326/7/4/045406 2023-08-13T00:37:47Z Permafrost degradation exhibits striking and profound influences on the alpine ecosystem, and response characteristics of vegetation and soil environment to such degradation inevitably differ during the entire degraded periods. However, up to now, the related research is lacking in the Qinghai–Tibetan Plateau (QTP). For this reason, twenty ecological plots in the different types of permafrost zones were selected in the upstream regions of the Shule River Basin on the northeastern margin of the QTP. Vegetation characteristics (species diversity, community coverage and biomass etc) and topsoil environment (temperature (ST), water content (SW), mechanical composition (SMC), culturable microorganism (SCM), organic carbon (SOC) and total nitrogen (TN) contents and so on), as well as active layer thickness (ALT) were investigated in late July 2009 and 2010. A spatial–temporal shifts method (the spatial pattern that is represented by different types of permafrost shifting to the temporal series that stands for different stages of permafrost degradation) has been used to discuss response characteristics of vegetation and topsoil environment throughout the entire permafrost degradation. The results showed that (1) ST of 0–40 cm depth and ALT gradually increased from highly stable and stable permafrost (H-SP) to unstable permafrost (UP). SW increased initially and then decreased, and SOC content and the quantities of SCM at a depth of 0–20 cm first decreased and then increased, whereas TN content and SMC showed obscure trends throughout the stages of permafrost degradation with a stability decline from H-SP to extremely unstable permafrost (EUP); (2) further, species diversity, community coverage and biomass first increased and then decreased in the stages from H-SP to EUP; (3) in the alpine meadow ecosystem, SOC and TN contents increased initially and then decreased, soil sandy fractions gradually increased with stages of permafrost degradation from substable (SSP) to transitional (TP), and to UP. Meanwhile, SOC/TN ... Article in Journal/Newspaper Active layer thickness permafrost Directory of Open Access Journals: DOAJ Articles Environmental Research Letters 7 4 045406 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
vegetation characteristics soil environment permafrost degradation Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
vegetation characteristics soil environment permafrost degradation Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Shengyun Chen Wenjie Liu Xiang Qin Yushuo Liu Tongzuo Zhang Kelong Chen Fengzu Hu Jiawen Ren Dahe Qin Response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the Shule River Basin |
topic_facet |
vegetation characteristics soil environment permafrost degradation Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Permafrost degradation exhibits striking and profound influences on the alpine ecosystem, and response characteristics of vegetation and soil environment to such degradation inevitably differ during the entire degraded periods. However, up to now, the related research is lacking in the Qinghai–Tibetan Plateau (QTP). For this reason, twenty ecological plots in the different types of permafrost zones were selected in the upstream regions of the Shule River Basin on the northeastern margin of the QTP. Vegetation characteristics (species diversity, community coverage and biomass etc) and topsoil environment (temperature (ST), water content (SW), mechanical composition (SMC), culturable microorganism (SCM), organic carbon (SOC) and total nitrogen (TN) contents and so on), as well as active layer thickness (ALT) were investigated in late July 2009 and 2010. A spatial–temporal shifts method (the spatial pattern that is represented by different types of permafrost shifting to the temporal series that stands for different stages of permafrost degradation) has been used to discuss response characteristics of vegetation and topsoil environment throughout the entire permafrost degradation. The results showed that (1) ST of 0–40 cm depth and ALT gradually increased from highly stable and stable permafrost (H-SP) to unstable permafrost (UP). SW increased initially and then decreased, and SOC content and the quantities of SCM at a depth of 0–20 cm first decreased and then increased, whereas TN content and SMC showed obscure trends throughout the stages of permafrost degradation with a stability decline from H-SP to extremely unstable permafrost (EUP); (2) further, species diversity, community coverage and biomass first increased and then decreased in the stages from H-SP to EUP; (3) in the alpine meadow ecosystem, SOC and TN contents increased initially and then decreased, soil sandy fractions gradually increased with stages of permafrost degradation from substable (SSP) to transitional (TP), and to UP. Meanwhile, SOC/TN ... |
format |
Article in Journal/Newspaper |
author |
Shengyun Chen Wenjie Liu Xiang Qin Yushuo Liu Tongzuo Zhang Kelong Chen Fengzu Hu Jiawen Ren Dahe Qin |
author_facet |
Shengyun Chen Wenjie Liu Xiang Qin Yushuo Liu Tongzuo Zhang Kelong Chen Fengzu Hu Jiawen Ren Dahe Qin |
author_sort |
Shengyun Chen |
title |
Response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the Shule River Basin |
title_short |
Response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the Shule River Basin |
title_full |
Response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the Shule River Basin |
title_fullStr |
Response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the Shule River Basin |
title_full_unstemmed |
Response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the Shule River Basin |
title_sort |
response characteristics of vegetation and soil environment to permafrost degradation in the upstream regions of the shule river basin |
publisher |
IOP Publishing |
publishDate |
2012 |
url |
https://doi.org/10.1088/1748-9326/7/4/045406 https://doaj.org/article/0e6b7dc8885c46a495fc3f5af4777dd5 |
genre |
Active layer thickness permafrost |
genre_facet |
Active layer thickness permafrost |
op_source |
Environmental Research Letters, Vol 7, Iss 4, p 045406 (2012) |
op_relation |
https://doi.org/10.1088/1748-9326/7/4/045406 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/7/4/045406 1748-9326 https://doaj.org/article/0e6b7dc8885c46a495fc3f5af4777dd5 |
op_doi |
https://doi.org/10.1088/1748-9326/7/4/045406 |
container_title |
Environmental Research Letters |
container_volume |
7 |
container_issue |
4 |
container_start_page |
045406 |
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1776198589673897984 |