Wildfire legacies on pyrogenic carbon stocks in Amazonian peatlands.

IF 8.9 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Communications Earth & Environment Pub Date : 2025-01-01 Epub Date: 2025-08-19 DOI:10.1038/s43247-025-02674-7
Yuwan Wang, Angela Gallego-Sala, Michael I Bird, Patrick Moss, Hamish A McGowan, Juan C Benavides, Eurídice N Honorio Coronado, Ted R Feldpausch
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引用次数: 0

Abstract

Amazonian peatlands are carbon-rich ecosystems that act as long-term carbon sinks but have faced increasing fire risks in recent decades. As a legacy of past fires, the contribution of pyrogenic carbon (PyC) to carbon cycling in these peatlands remains poorly understood. Here, we assess PyC accumulation variability using six cores spanning peatlands in northwestern Amazonia using hydrogen pyrolysis. We also estimate the PyC stock for the entire Amazonian peatlands by combining our field dataset with published sources. The PyC to total organic carbon ratio averaged 1.2% across our sites and increased with peat age. We estimate a total peatland PyC stock of 0.73 ± 0.61 Pg for the Amazon Basin, representing 1.6% of their TOC stock. Due to the slower turnover of PyC in peatland ecosystems, our findings indicate the importance of PyC generated by past fires and highlight the potential long-term carbon sequestration role of PyC in the future carbon cycle.

野火对亚马逊泥炭地热原碳储量的影响。
亚马逊泥炭地是富含碳的生态系统,作为长期的碳汇,但近几十年来面临着越来越大的火灾风险。作为过去火灾的遗产,这些泥炭地的热原碳(PyC)对碳循环的贡献仍然知之甚少。在这里,我们使用氢热解方法评估了亚马逊西北部泥炭地的六个岩心的PyC积累变异性。我们还通过将我们的实地数据集与已发表的资料相结合,估计了整个亚马逊泥炭地的PyC储量。PyC与总有机碳比值平均为1.2%,随泥炭年龄的增长而增加。我们估计亚马逊盆地泥炭地的总PyC储量为0.73±0.61 Pg,占其TOC储量的1.6%。由于泥炭地生态系统中PyC的周转较慢,我们的研究结果表明了过去火灾产生的PyC的重要性,并强调了PyC在未来碳循环中潜在的长期固碳作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Communications Earth & Environment
Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
8.60
自引率
2.50%
发文量
269
审稿时长
26 weeks
期刊介绍: Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.
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