Changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming
International audience Permafrost regions contain approximately half of the carbon stored in land ecosystems and have warmed at least twice as much as any other biome. This warming has influenced vegetation activity, leading to changes in plant composition, physiology, and biomass storage in abovegr...
Published in: | Proceedings of the National Academy of Sciences |
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Online Access: | https://hal.science/hal-04613728 https://doi.org/10.1073/pnas.2314036121 |
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ftuniparissaclay:oai:HAL:hal-04613728v1 2024-09-30T14:41:14+00:00 Changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming Yun, Hanbo Ciais, Philippe Zhu, Qing Chen, Deliang Zohner, Constantin Tang, Jing Qu, Yang Zhou, Hao Schimel, Joshua Zhu, Peng Shao, Ming Christensen, Jens Hesselbjerg Wu, Qingbai Chen, Anping Elberling, Bo Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 2024-06-10 https://hal.science/hal-04613728 https://doi.org/10.1073/pnas.2314036121 en eng HAL CCSD National Academy of Sciences info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.2314036121 hal-04613728 https://hal.science/hal-04613728 doi:10.1073/pnas.2314036121 ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.science/hal-04613728 Proceedings of the National Academy of Sciences of the United States of America, 2024, 121 (25), ⟨10.1073/pnas.2314036121⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2024 ftuniparissaclay https://doi.org/10.1073/pnas.2314036121 2024-09-06T00:30:25Z International audience Permafrost regions contain approximately half of the carbon stored in land ecosystems and have warmed at least twice as much as any other biome. This warming has influenced vegetation activity, leading to changes in plant composition, physiology, and biomass storage in aboveground and belowground components, ultimately impacting ecosystem carbon balance. Yet, little is known about the causes and magnitude of long-term changes in the above- to belowground biomass ratio of plants (η). Here, we analyzed η values using 3,013 plots and 26,337 species-specific measurements across eight sites on the Tibetan Plateau from 1995 to 2021. Our analysis revealed distinct temporal trends in η for three vegetation types: a 17% increase in alpine wetlands, and a decrease of 26% and 48% in alpine meadows and alpine steppes, respectively. These trends were primarily driven by temperature-induced growth preferences rather than shifts in plant species composition. Our findings indicate that in wetter ecosystems, climate warming promotes aboveground plant growth, while in drier ecosystems, such as alpine meadows and alpine steppes, plants allocate more biomass belowground. Furthermore, we observed a threefold strengthening of the warming effect on η over the past 27 y. Soil moisture was found to modulate the sensitivity of η to soil temperature in alpine meadows and alpine steppes, but not in alpine wetlands. Our results contribute to a better understanding of the processes driving the response of biomass distribution to climate warming, which is crucial for predicting the future carbon trajectory of permafrost ecosystems and climate feedback. Article in Journal/Newspaper permafrost Archives ouvertes de Paris-Saclay Proceedings of the National Academy of Sciences 121 25 |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Yun, Hanbo Ciais, Philippe Zhu, Qing Chen, Deliang Zohner, Constantin Tang, Jing Qu, Yang Zhou, Hao Schimel, Joshua Zhu, Peng Shao, Ming Christensen, Jens Hesselbjerg Wu, Qingbai Chen, Anping Elberling, Bo Changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Permafrost regions contain approximately half of the carbon stored in land ecosystems and have warmed at least twice as much as any other biome. This warming has influenced vegetation activity, leading to changes in plant composition, physiology, and biomass storage in aboveground and belowground components, ultimately impacting ecosystem carbon balance. Yet, little is known about the causes and magnitude of long-term changes in the above- to belowground biomass ratio of plants (η). Here, we analyzed η values using 3,013 plots and 26,337 species-specific measurements across eight sites on the Tibetan Plateau from 1995 to 2021. Our analysis revealed distinct temporal trends in η for three vegetation types: a 17% increase in alpine wetlands, and a decrease of 26% and 48% in alpine meadows and alpine steppes, respectively. These trends were primarily driven by temperature-induced growth preferences rather than shifts in plant species composition. Our findings indicate that in wetter ecosystems, climate warming promotes aboveground plant growth, while in drier ecosystems, such as alpine meadows and alpine steppes, plants allocate more biomass belowground. Furthermore, we observed a threefold strengthening of the warming effect on η over the past 27 y. Soil moisture was found to modulate the sensitivity of η to soil temperature in alpine meadows and alpine steppes, but not in alpine wetlands. Our results contribute to a better understanding of the processes driving the response of biomass distribution to climate warming, which is crucial for predicting the future carbon trajectory of permafrost ecosystems and climate feedback. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
format |
Article in Journal/Newspaper |
author |
Yun, Hanbo Ciais, Philippe Zhu, Qing Chen, Deliang Zohner, Constantin Tang, Jing Qu, Yang Zhou, Hao Schimel, Joshua Zhu, Peng Shao, Ming Christensen, Jens Hesselbjerg Wu, Qingbai Chen, Anping Elberling, Bo |
author_facet |
Yun, Hanbo Ciais, Philippe Zhu, Qing Chen, Deliang Zohner, Constantin Tang, Jing Qu, Yang Zhou, Hao Schimel, Joshua Zhu, Peng Shao, Ming Christensen, Jens Hesselbjerg Wu, Qingbai Chen, Anping Elberling, Bo |
author_sort |
Yun, Hanbo |
title |
Changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming |
title_short |
Changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming |
title_full |
Changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming |
title_fullStr |
Changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming |
title_full_unstemmed |
Changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming |
title_sort |
changes in above- versus belowground biomass distribution in permafrost regions in response to climate warming |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04613728 https://doi.org/10.1073/pnas.2314036121 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.science/hal-04613728 Proceedings of the National Academy of Sciences of the United States of America, 2024, 121 (25), ⟨10.1073/pnas.2314036121⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.2314036121 hal-04613728 https://hal.science/hal-04613728 doi:10.1073/pnas.2314036121 |
op_doi |
https://doi.org/10.1073/pnas.2314036121 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
121 |
container_issue |
25 |
_version_ |
1811643650016280576 |