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| DOI | 10.1111/gcb.17089 |
| Controls on timescales of soil organic carbon persistence across sub-Saharan Africa | |
| 发表日期 | 2024 |
| ISSN | 1354-1013 |
| EISSN | 1365-2486 |
| 起始页码 | 30 |
| 结束页码 | 1 |
| 卷号 | 30期号:1 |
| 英文摘要 | Given the importance of soil for the global carbon cycle, it is essential to understand not only how much carbon soil stores but also how long this carbon persists. Previous studies have shown that the amount and age of soil carbon are strongly affected by the interaction of climate, vegetation, and mineralogy. However, these findings are primarily based on studies from temperate regions and from fine-scale studies, leaving large knowledge gaps for soils from understudied regions such as sub-Saharan Africa. In addition, there is a lack of data to validate modeled soil C dynamics at broad scales. Here, we present insights into organic carbon cycling, based on a new broad-scale radiocarbon and mineral dataset for sub-Saharan Africa. We found that in moderately weathered soils in seasonal climate zones with poorly crystalline and reactive clay minerals, organic carbon persists longer on average (topsoil: 201 +/- 130years; subsoil: 645 +/- 385years) than in highly weathered soils in humid regions (topsoil: 140 +/- 46years; subsoil: 454 +/- 247years) with less reactive minerals. Soils in arid climate zones (topsoil: 396 +/- 339years; subsoil: 963 +/- 669years) store organic carbon for periods more similar to those in seasonal climate zones, likely reflecting climatic constraints on weathering, carbon inputs and microbial decomposition. These insights into the timescales of organic carbon persistence in soils of sub-Saharan Africa suggest that a process-oriented grouping of soils based on pedo-climatic conditions may be useful to improve predictions of soil responses to climate change at broader scales. |
| 英文关键词 | African Soil Information Service; Afrotropics; clay mineralogy; climate change; mean C age; radiocarbon; subtropical |
| 语种 | 英语 |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
| WOS记录号 | WOS:001151213000103 |
| 来源期刊 | GLOBAL CHANGE BIOLOGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/289635 |
| 作者单位 | Max Planck Society; Swiss Federal Institutes of Technology Domain; ETH Zurich; James Hutton Institute; CGIAR; World Agroforestry (ICRAF); University of California System; University of California Merced; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC); Rothamsted Research; Alliance; International Center for Tropical Agriculture - CIAT; Universite Nangui Abrogoua; Stanford University; Dartmouth College |
| 推荐引用方式 GB/T 7714 | . Controls on timescales of soil organic carbon persistence across sub-Saharan Africa[J],2024,30(1). |
| APA | (2024).Controls on timescales of soil organic carbon persistence across sub-Saharan Africa.GLOBAL CHANGE BIOLOGY,30(1). |
| MLA | "Controls on timescales of soil organic carbon persistence across sub-Saharan Africa".GLOBAL CHANGE BIOLOGY 30.1(2024). |
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