Methane uptake responses to extreme droughts regulated by seasonal timing and plant composition
文献类型：期刊论文
| 作者 | Zheng, Zhenzhen1; Wen, Fuqi1; Biederman, Joel A.2; Tudi, Muyesaier3; Lv, Mengbo1; Xu, Shaorui1; Cui, Xiaoyong1; Wang, Yanfen4,5; Hao, Yanbin1,4; Li, Linfeng6 |
| 刊名 | CATENA
 |
| 出版日期 | 2024-03-30 |
| 卷号 | 237页码:9 |
| ISSN号 | 0341-8162 |
| 关键词 | Climate extremes Greenhouse gases Methanotrophs Community composition Drought timing CH4 |
| DOI | 10.1016/j.catena.2024.107822 |
| 通讯作者 | Li, Linfeng(lilinfeng@ucas.ac.cn) |
| 英文摘要 | Increasingly frequent and severe droughts are occurring in multiple seasons of a year in many dryland ecosystems, with unknown impacts on the role of drylands in cycling of methane (CH4), a potent greenhouse gas. In particular, there is limited understanding of how drought occurring at different times within the growing season regulates biological CH4 uptake, and how these responses are mediated by plant community composition. Here, we quantify how drought timing and plant community composition regulate CH4 uptake in a semiarid grassland. We employ a field experiment in which droughts were imposed in early, middle, or late growing season in three different communities (two graminoids, two shrubs and their mixture), respectively. All three droughts increased CH4 uptake, but the effect size and pathway varied with seasonal timing. Early and middle drought increased CH4 uptake through increasing both soil pomA abundance and diffusivity resulting from reduced soil water content (SWC), while late drought increased CH4 uptake only by reducing SWC. Overall, early drought had the least positive effects on CH4 uptake because it excluded the least precipitation and therefore had smaller impacts on SWC. Besides, plant composition did not affect CH4 uptake under normal environment but regulated CH4 uptake in response to droughts due to different response of plant composition to droughts. Early and middle drought had larger positive effects on CH4 uptake in shrub communities than the other two communities, consistent with larger reductions in SWC and larger increases in pomA abundance, respectively. In contrast, late drought had consistent effects on CH4 uptake across three communities. Our results suggest that the magnitude and pathways of extreme drought effects on CH4 uptake are strongly co-regulated by seasonal timing and plant composition. |
| WOS关键词 | SOIL-MOISTURE ; CLIMATE EXTREMES ; CONSUMPTION ; FLUXES ; TEMPERATURE ; GRASSLANDS ; DIVERSITY ; ABUNDANCE ; PLATEAU ; CH4 |
| 资助项目 | National Natural Science Foundation of China[42041005] ; National Natural Science Foundation of China[32101313] ; China Post- doctoral Science Foundation[2021 M693138] ; Fundamental Research Funds for the Central Universities[E1E40607] ; Fundamental Research Funds for the Central Universities[E1E40511] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001156451700001 |
| 资助机构 | National Natural Science Foundation of China ; China Post- doctoral Science Foundation ; Fundamental Research Funds for the Central Universities |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/202538]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Linfeng |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China 2.USDA Agr Res Serv, Southwest Watershed Res Ctr, Tucson, AZ 85719 USA 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, 11 Datun Rd, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Beijing Yanshan Earth Crit Zone Natl Res Stn, Beijing 101408, Peoples R China 5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 6.Fujian Agr & Forestry Univ, Forestry Coll, Fujian 350002, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhenzhen,Wen, Fuqi,Biederman, Joel A.,et al. Methane uptake responses to extreme droughts regulated by seasonal timing and plant composition[J]. CATENA,2024,237:9. |
| APA | Zheng, Zhenzhen.,Wen, Fuqi.,Biederman, Joel A..,Tudi, Muyesaier.,Lv, Mengbo.,...&Li, Linfeng.(2024).Methane uptake responses to extreme droughts regulated by seasonal timing and plant composition.CATENA,237,9. |
| MLA | Zheng, Zhenzhen,et al."Methane uptake responses to extreme droughts regulated by seasonal timing and plant composition".CATENA 237(2024):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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