Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15262 |
Carbon storage dynamics in peatlands: Comparing recent‐ and long‐term accumulation histories in southern Patagonia | |
Michael S. Bunsen; Julie Loisel | |
2020-08-05 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | Peatlands have been important terrestrial carbon (C) reservoirs throughout the Holocene, yet whether these ecosystems will become stronger or weaker C sinks in the future remains debated. While surface peat layers (acrotelm) have a greater apparent rate of C accumulation than deeper, millennial‐aged peat (catotelm), it is difficult to project how much more aerobic decomposition will take place before the younger surface cohorts join the older deeper ones. Studies have suggested that warming could lead to weakened C accumulation in peatlands due to enhanced aerobic decay in the acrotelm, which would lead to a slower transfer of peat into the catotelm, if any. Conversely, other studies have suggested increased C accumulation in the acrotelm and thus, larger long‐term C transfer into the catotelm under warming conditions because of greater plant productivity and faster peat accumulation. Improving our predictions about the rate of present and future peatland development is important to forecast feedbacks on the global C cycle and help inform land management decisions. In this study, we analyzed two peat cores from southern Patagonia to calculate their long‐ versus short‐peat C accumulation rates. The acrotelm rates were compared to the catotelm peat C legacies using an empirical modeling approach that allows calculating the future catotelm peat storage based on today's acrotelm characteristics, and thus predict if those recent rates of C accumulation will lead to greater or weaker long‐term C storage in the future. Our results indicate that, depending on local bioclimatic parameters, some peatlands may become stronger C sinks in the future, while others may become weaker. In the case of this study, the wetter site is expected to increase its C sink capacity, while our prediction for the drier site is a net decrease in C sequestration in the coming decades to centuries. |
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/287682 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Michael S. Bunsen,Julie Loisel. Carbon storage dynamics in peatlands: Comparing recent‐ and long‐term accumulation histories in southern Patagonia[J]. Global Change Biology,2020. |
APA | Michael S. Bunsen,&Julie Loisel.(2020).Carbon storage dynamics in peatlands: Comparing recent‐ and long‐term accumulation histories in southern Patagonia.Global Change Biology. |
MLA | Michael S. Bunsen,et al."Carbon storage dynamics in peatlands: Comparing recent‐ and long‐term accumulation histories in southern Patagonia".Global Change Biology (2020). |
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