Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15955 |
Warming and elevated CO2 promote rapid incorporation and degradation of plant-derived organic matter in an ombrotrophic peatland | |
Nicholas O. E. Ofiti; Emily F. Solly; Paul J. Hanson; Avni Malhotra; Guido L. B. Wiesenberg; Michael W. I. Schmidt | |
2021-11-08 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | Rising temperatures have the potential to directly affect carbon cycling in peatlands by enhancing organic matter (OM) decomposition, contributing to the release of CO2 and CH4 to the atmosphere. In turn, increasing atmospheric CO2 concentration may stimulate photosynthesis, potentially increasing plant litter inputs belowground and transferring carbon from the atmosphere into terrestrial ecosystems. Key questions remain about the magnitude and rate of these interacting and opposing environmental change drivers. Here, we assess the incorporation and degradation of plant- and microbe-derived OM in an ombrotrophic peatland after 4 years of whole-ecosystem warming (+0, +2.25, +4.5, +6.75 and +9°C) and two years of elevated CO2 manipulation (500 ppm above ambient). We show that OM molecular composition was substantially altered in the aerobic acrotelm, highlighting the sensitivity of acrotelm carbon to rising temperatures and atmospheric CO2 concentration. While warming accelerated OM decomposition under ambient CO2, new carbon incorporation into peat increased in warming × elevated CO2 treatments for both plant- and microbe-derived OM. Using the isotopic signature of the applied CO2 enrichment as a label for recently photosynthesized OM, our data demonstrate that new plant inputs have been rapidly incorporated into peat carbon. Our results suggest that under current hydrological conditions, rising temperatures and atmospheric CO2 levels will likely offset each other in boreal peatlands. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/340947 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Nicholas O. E. Ofiti,Emily F. Solly,Paul J. Hanson,et al. Warming and elevated CO2 promote rapid incorporation and degradation of plant-derived organic matter in an ombrotrophic peatland[J]. Global Change Biology,2021. |
APA | Nicholas O. E. Ofiti,Emily F. Solly,Paul J. Hanson,Avni Malhotra,Guido L. B. Wiesenberg,&Michael W. I. Schmidt.(2021).Warming and elevated CO2 promote rapid incorporation and degradation of plant-derived organic matter in an ombrotrophic peatland.Global Change Biology. |
MLA | Nicholas O. E. Ofiti,et al."Warming and elevated CO2 promote rapid incorporation and degradation of plant-derived organic matter in an ombrotrophic peatland".Global Change Biology (2021). |
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