Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands
Adequate understanding of the controlling factors of soil carbon (C) stock is crucial for improving the predictability of Earth System Models in exploring terrestrial C-climate feedback. Current studies, however, mainly focus on climatic and edaphic variables and rarely explore the effects of minera...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Online Access: | http://ir.ibcas.ac.cn/handle/2S10CLM1/19459 https://doi.org/10.1029/2018JG004782 |
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ftchiacadscibcas:oai:ir.ibcas.ac.cn:2S10CLM1/19459 2023-05-15T17:58:10+02:00 Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands Fang, Kai Qin, Shuqi Chen, Leiyi Zhang, Qiwen Yang, Yuanhe 2019 http://ir.ibcas.ac.cn/handle/2S10CLM1/19459 https://doi.org/10.1029/2018JG004782 英语 eng AMER GEOPHYSICAL UNION JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES http://ir.ibcas.ac.cn/handle/2S10CLM1/19459 doi:10.1029/2018JG004782 cn.org.cspace.api.content.CopyrightPolicy@20b1f812 carbon cycle climate feedback geochemistry mineral protection soil organic carbon stabilization Environmental Sciences Geosciences Multidisciplinary FOREST SOILS TEMPERATURE SENSITIVITY PERMAFROST SOILS MATTER IRON STORAGE CLIMATE DYNAMICS ASSOCIATIONS Environmental Sciences & Ecology Geology Article 期刊论文 2019 ftchiacadscibcas https://doi.org/10.1029/2018JG004782 2022-06-12T18:13:47Z Adequate understanding of the controlling factors of soil carbon (C) stock is crucial for improving the predictability of Earth System Models in exploring terrestrial C-climate feedback. Current studies, however, mainly focus on climatic and edaphic variables and rarely explore the effects of mineral protection in regulating soil organic carbon (SOC) stock over broad geographic scale. Particularly, the relative importance of mineral protection compared with other factors is unclear. Based on large-scale soil inventory, here we filled this knowledge gap by exploring the effects of Al/Fe-(hydr) oxides on SOC and three C fractions across Tibetan alpine grasslands via linear regression, partial correlation, and variance partitioning analyses, and also by comparing the degree of mineral protection in alpine grasslands with other ecosystems. Our results showed that SOC and C fractions across Tibetan alpine grasslands were regulated by Al/Fe-(hydr) oxides, with the incorporation of mineral variables increasing the explained variations by 10.1% for SOC content, 13.4% for coarse particulate organic matter, 12.6% for microaggregate associated C, and 21.9% for silt and clay associated C. Moreover, the contribution of mineral effects exceeded that of climatic and edaphic factors, particularly in the silt and clay associated C fraction. In addition, about 15.812.0% of SOC pools were associated with Fe, which was equal to or higher than those in temperate and tropical-subtropical ecosystems. Taken together, these results demonstrate the significant role of Al/Fe minerals in the stabilization of SOC across Tibetan alpine grasslands, highlighting the importance of incorporating C-mineral interactions into ESMs for better understanding the terrestrial C-climate feedback. Article in Journal/Newspaper permafrost Institute of Botany: IBCAS OpenIR (Chinese Academy Of Sciences) Journal of Geophysical Research: Biogeosciences 124 2 247 259 |
institution |
Open Polar |
collection |
Institute of Botany: IBCAS OpenIR (Chinese Academy Of Sciences) |
op_collection_id |
ftchiacadscibcas |
language |
English |
topic |
carbon cycle climate feedback geochemistry mineral protection soil organic carbon stabilization Environmental Sciences Geosciences Multidisciplinary FOREST SOILS TEMPERATURE SENSITIVITY PERMAFROST SOILS MATTER IRON STORAGE CLIMATE DYNAMICS ASSOCIATIONS Environmental Sciences & Ecology Geology |
spellingShingle |
carbon cycle climate feedback geochemistry mineral protection soil organic carbon stabilization Environmental Sciences Geosciences Multidisciplinary FOREST SOILS TEMPERATURE SENSITIVITY PERMAFROST SOILS MATTER IRON STORAGE CLIMATE DYNAMICS ASSOCIATIONS Environmental Sciences & Ecology Geology Fang, Kai Qin, Shuqi Chen, Leiyi Zhang, Qiwen Yang, Yuanhe Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands |
topic_facet |
carbon cycle climate feedback geochemistry mineral protection soil organic carbon stabilization Environmental Sciences Geosciences Multidisciplinary FOREST SOILS TEMPERATURE SENSITIVITY PERMAFROST SOILS MATTER IRON STORAGE CLIMATE DYNAMICS ASSOCIATIONS Environmental Sciences & Ecology Geology |
description |
Adequate understanding of the controlling factors of soil carbon (C) stock is crucial for improving the predictability of Earth System Models in exploring terrestrial C-climate feedback. Current studies, however, mainly focus on climatic and edaphic variables and rarely explore the effects of mineral protection in regulating soil organic carbon (SOC) stock over broad geographic scale. Particularly, the relative importance of mineral protection compared with other factors is unclear. Based on large-scale soil inventory, here we filled this knowledge gap by exploring the effects of Al/Fe-(hydr) oxides on SOC and three C fractions across Tibetan alpine grasslands via linear regression, partial correlation, and variance partitioning analyses, and also by comparing the degree of mineral protection in alpine grasslands with other ecosystems. Our results showed that SOC and C fractions across Tibetan alpine grasslands were regulated by Al/Fe-(hydr) oxides, with the incorporation of mineral variables increasing the explained variations by 10.1% for SOC content, 13.4% for coarse particulate organic matter, 12.6% for microaggregate associated C, and 21.9% for silt and clay associated C. Moreover, the contribution of mineral effects exceeded that of climatic and edaphic factors, particularly in the silt and clay associated C fraction. In addition, about 15.812.0% of SOC pools were associated with Fe, which was equal to or higher than those in temperate and tropical-subtropical ecosystems. Taken together, these results demonstrate the significant role of Al/Fe minerals in the stabilization of SOC across Tibetan alpine grasslands, highlighting the importance of incorporating C-mineral interactions into ESMs for better understanding the terrestrial C-climate feedback. |
format |
Article in Journal/Newspaper |
author |
Fang, Kai Qin, Shuqi Chen, Leiyi Zhang, Qiwen Yang, Yuanhe |
author_facet |
Fang, Kai Qin, Shuqi Chen, Leiyi Zhang, Qiwen Yang, Yuanhe |
author_sort |
Fang, Kai |
title |
Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands |
title_short |
Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands |
title_full |
Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands |
title_fullStr |
Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands |
title_full_unstemmed |
Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands |
title_sort |
al/fe mineral controls on soil organic carbon stock across tibetan alpine grasslands |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2019 |
url |
http://ir.ibcas.ac.cn/handle/2S10CLM1/19459 https://doi.org/10.1029/2018JG004782 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES http://ir.ibcas.ac.cn/handle/2S10CLM1/19459 doi:10.1029/2018JG004782 |
op_rights |
cn.org.cspace.api.content.CopyrightPolicy@20b1f812 |
op_doi |
https://doi.org/10.1029/2018JG004782 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
124 |
container_issue |
2 |
container_start_page |
247 |
op_container_end_page |
259 |
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1766166718762188800 |