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Accelerated dryland expansion regulates future variability in dryland gross primary production

Drylands cover 41% of Earth’s surface and are the largest source of interannual variability in the global carbon sink. Drylands are projected to experience accelerated expansion over the next century, but the implications of this expansion on variability in gross primary production (GPP) remain elus...

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Autores principales: Yao, Jingyu, Liu, Heping, Huang, Jianping, Gao, Zhongming, Wang, Guoyin, Li, Dan, Yu, Haipeng, Chen, Xingyuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7125214/
https://www.ncbi.nlm.nih.gov/pubmed/32246032
http://dx.doi.org/10.1038/s41467-020-15515-2
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author Yao, Jingyu
Liu, Heping
Huang, Jianping
Gao, Zhongming
Wang, Guoyin
Li, Dan
Yu, Haipeng
Chen, Xingyuan
author_facet Yao, Jingyu
Liu, Heping
Huang, Jianping
Gao, Zhongming
Wang, Guoyin
Li, Dan
Yu, Haipeng
Chen, Xingyuan
author_sort Yao, Jingyu
collection PubMed
description Drylands cover 41% of Earth’s surface and are the largest source of interannual variability in the global carbon sink. Drylands are projected to experience accelerated expansion over the next century, but the implications of this expansion on variability in gross primary production (GPP) remain elusive. Here we show that by 2100 total dryland GPP will increase by 12 ± 3% relative to the 2000–2014 baseline. Because drylands will largely expand into formerly productive ecosystems, this increase in dryland GPP may not increase global GPP. Further, GPP per unit dryland area will decrease as degradation of historical drylands outpaces the higher GPP of expanded drylands. Dryland expansion and climate-induced conversions among sub-humid, semi-arid, arid, and hyper-arid subtypes will lead to substantial changes in regional and subtype contributions to global dryland GPP variability. Our results highlight the vulnerability of dryland subtypes to more frequent and severe climate extremes and suggest that regional variations will require different mitigation strategies.
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spelling pubmed-71252142020-04-06 Accelerated dryland expansion regulates future variability in dryland gross primary production Yao, Jingyu Liu, Heping Huang, Jianping Gao, Zhongming Wang, Guoyin Li, Dan Yu, Haipeng Chen, Xingyuan Nat Commun Article Drylands cover 41% of Earth’s surface and are the largest source of interannual variability in the global carbon sink. Drylands are projected to experience accelerated expansion over the next century, but the implications of this expansion on variability in gross primary production (GPP) remain elusive. Here we show that by 2100 total dryland GPP will increase by 12 ± 3% relative to the 2000–2014 baseline. Because drylands will largely expand into formerly productive ecosystems, this increase in dryland GPP may not increase global GPP. Further, GPP per unit dryland area will decrease as degradation of historical drylands outpaces the higher GPP of expanded drylands. Dryland expansion and climate-induced conversions among sub-humid, semi-arid, arid, and hyper-arid subtypes will lead to substantial changes in regional and subtype contributions to global dryland GPP variability. Our results highlight the vulnerability of dryland subtypes to more frequent and severe climate extremes and suggest that regional variations will require different mitigation strategies. Nature Publishing Group UK 2020-04-03 /pmc/articles/PMC7125214/ /pubmed/32246032 http://dx.doi.org/10.1038/s41467-020-15515-2 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yao, Jingyu
Liu, Heping
Huang, Jianping
Gao, Zhongming
Wang, Guoyin
Li, Dan
Yu, Haipeng
Chen, Xingyuan
Accelerated dryland expansion regulates future variability in dryland gross primary production
title Accelerated dryland expansion regulates future variability in dryland gross primary production
title_full Accelerated dryland expansion regulates future variability in dryland gross primary production
title_fullStr Accelerated dryland expansion regulates future variability in dryland gross primary production
title_full_unstemmed Accelerated dryland expansion regulates future variability in dryland gross primary production
title_short Accelerated dryland expansion regulates future variability in dryland gross primary production
title_sort accelerated dryland expansion regulates future variability in dryland gross primary production
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7125214/
https://www.ncbi.nlm.nih.gov/pubmed/32246032
http://dx.doi.org/10.1038/s41467-020-15515-2
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