Permafrost response to temperature rise in carbon and nutrient cycling: Effects from habitat-specific conditions and factors of warming
Permafrost is warming at a rate of two times faster than the rest of the Earth's surface. However, there is still a lack of a quantitative basis for predicting the functional stability of permafrost ecosystems in carbon (C) and nutrient cycling. We compiled the data of 708 observations from 89...
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ftzenodo:oai:zenodo.org:7618745 2024-09-15T18:29:39+00:00 Permafrost response to temperature rise in carbon and nutrient cycling: Effects from habitat-specific conditions and factors of warming Gao, Wenlong Sun, Weimin Xu, Xingliang 2023-02-07 https://doi.org/10.5061/dryad.jdfn2z3c1 unknown Zenodo https://doi.org/10.5281/zenodo.7533597 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.jdfn2z3c1 oai:zenodo.org:7618745 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode info:eu-repo/semantics/other 2023 ftzenodo https://doi.org/10.5061/dryad.jdfn2z3c110.5281/zenodo.7533597 2024-07-27T05:19:28Z Permafrost is warming at a rate of two times faster than the rest of the Earth's surface. However, there is still a lack of a quantitative basis for predicting the functional stability of permafrost ecosystems in carbon (C) and nutrient cycling. We compiled the data of 708 observations from 89 air-warming experiments in the Northern Hemisphere and characterized the general effects of temperature increase on permafrost C exchange and balance, biomass production, microbial biomass, soil nutrients, and vegetation N dynamics via a meta-analysis. Also, an investigation was made on how responses may change with habitat-specific (e.g., plant functional groups and soil moisture status) conditions and warming variables (e.g., warming phases, levels, and timing). Warming downregulated net ecosystem C exchange generally via stimulating ecosystem respiration (15.6%) more than photosynthesis (6.2%). Vegetation usually responded to warming by investing more the C to the belowground, as belowground biomass increased much more (30.1%) than aboveground biomass (2.9%). Warming had a minor effect on microbial biomass. Warming increased soil ammonium and nitrate concentrations. What's more, a synthesis of 70 observations from 11 herbs and 9 shrubs revealed a 2.5% decline of N in green leaves. Compared to herbs, shrubs demonstrated a stronger response in respiration and had green leaf N declined by a greater extent. Not only in dry conditions did green leaf N decline with warming but also in wet conditions. Warming in non-growing seasons would negatively affect soil water, C uptake, and biomass production during growing seasons. Permafrost C loss and vegetation N decline may increase with warming levels and timing. Overall, our findings suggest that besides a positive C cycling-climate feedback, there will be negative feedback between permafrost nutrient cycling and climate warming. Funding provided by: National Natural Science Foundation of China Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100001809 Award Number: ... Other/Unknown Material permafrost Zenodo |
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Permafrost is warming at a rate of two times faster than the rest of the Earth's surface. However, there is still a lack of a quantitative basis for predicting the functional stability of permafrost ecosystems in carbon (C) and nutrient cycling. We compiled the data of 708 observations from 89 air-warming experiments in the Northern Hemisphere and characterized the general effects of temperature increase on permafrost C exchange and balance, biomass production, microbial biomass, soil nutrients, and vegetation N dynamics via a meta-analysis. Also, an investigation was made on how responses may change with habitat-specific (e.g., plant functional groups and soil moisture status) conditions and warming variables (e.g., warming phases, levels, and timing). Warming downregulated net ecosystem C exchange generally via stimulating ecosystem respiration (15.6%) more than photosynthesis (6.2%). Vegetation usually responded to warming by investing more the C to the belowground, as belowground biomass increased much more (30.1%) than aboveground biomass (2.9%). Warming had a minor effect on microbial biomass. Warming increased soil ammonium and nitrate concentrations. What's more, a synthesis of 70 observations from 11 herbs and 9 shrubs revealed a 2.5% decline of N in green leaves. Compared to herbs, shrubs demonstrated a stronger response in respiration and had green leaf N declined by a greater extent. Not only in dry conditions did green leaf N decline with warming but also in wet conditions. Warming in non-growing seasons would negatively affect soil water, C uptake, and biomass production during growing seasons. Permafrost C loss and vegetation N decline may increase with warming levels and timing. Overall, our findings suggest that besides a positive C cycling-climate feedback, there will be negative feedback between permafrost nutrient cycling and climate warming. Funding provided by: National Natural Science Foundation of China Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100001809 Award Number: ... |
format |
Other/Unknown Material |
author |
Gao, Wenlong Sun, Weimin Xu, Xingliang |
spellingShingle |
Gao, Wenlong Sun, Weimin Xu, Xingliang Permafrost response to temperature rise in carbon and nutrient cycling: Effects from habitat-specific conditions and factors of warming |
author_facet |
Gao, Wenlong Sun, Weimin Xu, Xingliang |
author_sort |
Gao, Wenlong |
title |
Permafrost response to temperature rise in carbon and nutrient cycling: Effects from habitat-specific conditions and factors of warming |
title_short |
Permafrost response to temperature rise in carbon and nutrient cycling: Effects from habitat-specific conditions and factors of warming |
title_full |
Permafrost response to temperature rise in carbon and nutrient cycling: Effects from habitat-specific conditions and factors of warming |
title_fullStr |
Permafrost response to temperature rise in carbon and nutrient cycling: Effects from habitat-specific conditions and factors of warming |
title_full_unstemmed |
Permafrost response to temperature rise in carbon and nutrient cycling: Effects from habitat-specific conditions and factors of warming |
title_sort |
permafrost response to temperature rise in carbon and nutrient cycling: effects from habitat-specific conditions and factors of warming |
publisher |
Zenodo |
publishDate |
2023 |
url |
https://doi.org/10.5061/dryad.jdfn2z3c1 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
https://doi.org/10.5281/zenodo.7533597 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.jdfn2z3c1 oai:zenodo.org:7618745 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.jdfn2z3c110.5281/zenodo.7533597 |
_version_ |
1810471070804738048 |