Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.16032 |
Widespread recent ecosystem state shifts in high-latitude peatlands of northeastern Canada and implications for carbon sequestration | |
Gabriel Magnan; Nicole K. Sanderson; Sanna Piilo; Steve Pratte; Minna Vä; liranta; Simon van Bellen; Hui Zhang; Michelle Garneau | |
2021-12-25 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | Northern peatlands are a major component of the global carbon (C) cycle. Widespread climate-driven ecohydrological changes in these ecosystems can have major consequences on their C sequestration function. Here, we synthesize plant macrofossil data from 33 surficial peat cores from different ecoclimatic regions, with high-resolution chronologies. The main objectives were to document recent ecosystem state shifts and explore their impact on C sequestration in high-latitude undisturbed peatlands of northeastern Canada. Our synthesis shows widespread recent ecosystem shifts in peatlands, such as transitions from oligotrophic fens to bogs and Sphagnum expansion, coinciding with climate warming which has also influenced C accumulation during the last ~100 years. The rapid shifts towards drier bog communities and an expansion of Sphagnum sect. Acutifolia after 1980 CE were most pronounced in the northern subarctic sites and are concurrent with summer warming in northeastern Canada. These results provide further evidence of a northward migration of Sphagnum-dominated peatlands in North America in response to climate change. The results also highlight differences in the timing of ecosystem shifts among peatlands and regions, reflecting internal peatland dynamics and varying responses of vegetation communities. Our study suggests that the recent rapid climate-driven shifts from oligotrophic fen to drier bog communities have promoted plant productivity and thus peat C accumulation. We highlight the importance of considering recent ecohydrological trajectories when modelling the potential contribution of peatlands to climate change. Our study suggests that, contrary to expectations, peat C sequestration could be promoted in high-latitude non-permafrost peatlands where wet sedge fens may transition to drier Sphagnum bog communities due to warmer and longer growing seasons. |
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/344118 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Gabriel Magnan,Nicole K. Sanderson,Sanna Piilo,et al. Widespread recent ecosystem state shifts in high-latitude peatlands of northeastern Canada and implications for carbon sequestration[J]. Global Change Biology,2021. |
APA | Gabriel Magnan.,Nicole K. Sanderson.,Sanna Piilo.,Steve Pratte.,Minna Vä.,...&Michelle Garneau.(2021).Widespread recent ecosystem state shifts in high-latitude peatlands of northeastern Canada and implications for carbon sequestration.Global Change Biology. |
MLA | Gabriel Magnan,et al."Widespread recent ecosystem state shifts in high-latitude peatlands of northeastern Canada and implications for carbon sequestration".Global Change Biology (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论