From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry
Thermokarst lakes are formed as a result of thawing ice-rich permafrost, transforming vast permafrost soil into lake sediment and changing the biogeochemistry of carbon (C), nitrogen (N), and phosphorus (P). Degraded permafrost soil and thermokarst lake sediment are two distinct fates of pristine pe...
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ftdoajarticles:oai:doaj.org/article:1f700ee7743749b080c6321d7cf1c78f 2023-05-15T16:36:58+02:00 From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry Ze Ren Xia Li Cheng Zhang Qing Wang Le Fang Shengkui Cao Jinlei Yu 2022-10-01T00:00:00Z https://doi.org/10.3389/fenvs.2022.986879 https://doaj.org/article/1f700ee7743749b080c6321d7cf1c78f EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fenvs.2022.986879/full https://doaj.org/toc/2296-665X 2296-665X doi:10.3389/fenvs.2022.986879 https://doaj.org/article/1f700ee7743749b080c6321d7cf1c78f Frontiers in Environmental Science, Vol 10 (2022) thermokarst permafrost stoichiometry climate change sediment Environmental sciences GE1-350 article 2022 ftdoajarticles https://doi.org/10.3389/fenvs.2022.986879 2022-12-30T21:23:03Z Thermokarst lakes are formed as a result of thawing ice-rich permafrost, transforming vast permafrost soil into lake sediment and changing the biogeochemistry of carbon (C), nitrogen (N), and phosphorus (P). Degraded permafrost soil and thermokarst lake sediment are two distinct fates of pristine permafrost in the thermokarst processes. However, we do not clearly understand the differences and relationships between degraded permafrost soil and thermokarst lake sediment from a stoichiometric perspective. In this study, 44 thermokarst lakes across the Qinghai-Tibet Plateau were investigated to collect lake sediment and surrounding degraded permafrost soil. In general, C, N, and P concentrations as well as C:N, C:P, and N:P ratios in soil and sediment decreased with increasing latitude, while increased with increasing mean annual precipitation. The degraded permafrost soil had much higher C, N, and P concentrations and C:N:P stoichiometric ratios than the lake sediment, particularly for C. Moreover, the concentrations of C, N, and P, as well as the ratios of C:P and N:P in sediment showed significant positive relationships with their corresponding components in soil but with different slopes. Standard major axis regression showed allometric scaling relationships between C, N, and P. The C:N:P ratio was 269:18:1 in degraded permafrost soil and 178:15:1 in lake sediment. The results suggest that the process from pristine permafrost to lake sediment releases more C, N, and P than the process from pristine permafrost to degraded permafrost soil, and that C changes more profoundly than N and P. Moreover, thermokarst processes substantially change the elemental balance and decouple the C:N:P relationship between degraded permafrost soil and lake sediment, suggesting that the further transformation from degraded permafrost soil to lake sediment will lose more C, which can be intensified by increasing precipitation. The results enriched our understanding of the variations in C, N, and P biogeochemistry during thermokarst ... Article in Journal/Newspaper Ice permafrost Thermokarst Directory of Open Access Journals: DOAJ Articles Frontiers in Environmental Science 10 |
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topic |
thermokarst permafrost stoichiometry climate change sediment Environmental sciences GE1-350 |
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thermokarst permafrost stoichiometry climate change sediment Environmental sciences GE1-350 Ze Ren Xia Li Cheng Zhang Qing Wang Le Fang Shengkui Cao Jinlei Yu From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry |
topic_facet |
thermokarst permafrost stoichiometry climate change sediment Environmental sciences GE1-350 |
description |
Thermokarst lakes are formed as a result of thawing ice-rich permafrost, transforming vast permafrost soil into lake sediment and changing the biogeochemistry of carbon (C), nitrogen (N), and phosphorus (P). Degraded permafrost soil and thermokarst lake sediment are two distinct fates of pristine permafrost in the thermokarst processes. However, we do not clearly understand the differences and relationships between degraded permafrost soil and thermokarst lake sediment from a stoichiometric perspective. In this study, 44 thermokarst lakes across the Qinghai-Tibet Plateau were investigated to collect lake sediment and surrounding degraded permafrost soil. In general, C, N, and P concentrations as well as C:N, C:P, and N:P ratios in soil and sediment decreased with increasing latitude, while increased with increasing mean annual precipitation. The degraded permafrost soil had much higher C, N, and P concentrations and C:N:P stoichiometric ratios than the lake sediment, particularly for C. Moreover, the concentrations of C, N, and P, as well as the ratios of C:P and N:P in sediment showed significant positive relationships with their corresponding components in soil but with different slopes. Standard major axis regression showed allometric scaling relationships between C, N, and P. The C:N:P ratio was 269:18:1 in degraded permafrost soil and 178:15:1 in lake sediment. The results suggest that the process from pristine permafrost to lake sediment releases more C, N, and P than the process from pristine permafrost to degraded permafrost soil, and that C changes more profoundly than N and P. Moreover, thermokarst processes substantially change the elemental balance and decouple the C:N:P relationship between degraded permafrost soil and lake sediment, suggesting that the further transformation from degraded permafrost soil to lake sediment will lose more C, which can be intensified by increasing precipitation. The results enriched our understanding of the variations in C, N, and P biogeochemistry during thermokarst ... |
format |
Article in Journal/Newspaper |
author |
Ze Ren Xia Li Cheng Zhang Qing Wang Le Fang Shengkui Cao Jinlei Yu |
author_facet |
Ze Ren Xia Li Cheng Zhang Qing Wang Le Fang Shengkui Cao Jinlei Yu |
author_sort |
Ze Ren |
title |
From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry |
title_short |
From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry |
title_full |
From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry |
title_fullStr |
From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry |
title_full_unstemmed |
From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry |
title_sort |
from permafrost soil to thermokarst lake sediment: a view from c:n:p stoichiometry |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fenvs.2022.986879 https://doaj.org/article/1f700ee7743749b080c6321d7cf1c78f |
genre |
Ice permafrost Thermokarst |
genre_facet |
Ice permafrost Thermokarst |
op_source |
Frontiers in Environmental Science, Vol 10 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fenvs.2022.986879/full https://doaj.org/toc/2296-665X 2296-665X doi:10.3389/fenvs.2022.986879 https://doaj.org/article/1f700ee7743749b080c6321d7cf1c78f |
op_doi |
https://doi.org/10.3389/fenvs.2022.986879 |
container_title |
Frontiers in Environmental Science |
container_volume |
10 |
_version_ |
1766027287127392256 |