Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14498 |
Tree stem bases are sources of CH4 and N2O in a tropical forest on upland soil during the dry to wet season transition | |
Welch, Bertie1; Gauci, Vincent1; Sayer, Emma J.2,3 | |
2019 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:1页码:361-372 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Panama |
英文摘要 | Tropical forests on upland soils are assumed to be a methane (CH4) sink and a weak source of nitrous oxide (N2O), but studies of wetland forests have demonstrated that tree stems can be a substantial source of CH4, and recent evidence from temperate woodlands suggests that tree stems can also emit N2O. Here, we measured CH4 and N2O fluxes from the soil and from tree stems in a semi-evergreen tropical forest on upland soil. To examine the influence of seasonality, soil abiotic conditions and substrate availability (litter inputs) on trace greenhouse gas (GHG) fluxes, we conducted our study during the transition from the dry to the wet season in a long-term litter manipulation experiment in Panama, Central America. Trace GHG fluxes were measured from individual stem bases of two common tree species and from soils beneath the same trees. Soil CH4 fluxes varied from uptake in the dry season to minor emissions in the wet season. Soil N2O fluxes were negligible during the dry season but increased markedly after the start of the wet season. By contrast, tree stem bases emitted CH4 and N2O throughout the study. Although we observed no clear effect of litter manipulation on trace GHG fluxes, tree species and litter treatments interacted to influence CH4 fluxes from stems and N2O fluxes from stems and soil, indicating complex relationships between tree species traits and decomposition processes that can influence trace GHG dynamics. Collectively, our results show that tropical trees can act as conduits for trace GHGs that most likely originate from deeper soil horizons, even when they are growing on upland soils. Coupled with the finding that the soils may be a weaker sink for CH4 than previously thought, our research highlights the need to reappraise trace gas budgets in tropical forests. |
英文关键词 | leaf litter methane nitrous oxide soil trace greenhouse gases tree stem emissions upland tropical forest |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453370700030 |
WOS关键词 | NITROUS-OXIDE EMISSIONS ; METHANE EMISSIONS ; ATMOSPHERE EXCHANGE ; FLUX MEASUREMENTS ; CARBON-DIOXIDE ; NITRIC-OXIDE ; HOT MOMENTS ; RAIN-FOREST ; CO2 ; ALDER |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/17197 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Open Univ, Sch Environm Earth & Ecosyst Sci, Milton Keynes, Bucks, England; 2.Univ Lancaster, Lancaster Environm Ctr, Lancaster, England; 3.Smithsonian Trop Res Inst, Balboa, Ancon, Panama |
推荐引用方式 GB/T 7714 | Welch, Bertie,Gauci, Vincent,Sayer, Emma J.. Tree stem bases are sources of CH4 and N2O in a tropical forest on upland soil during the dry to wet season transition[J]. GLOBAL CHANGE BIOLOGY,2019,25(1):361-372. |
APA | Welch, Bertie,Gauci, Vincent,&Sayer, Emma J..(2019).Tree stem bases are sources of CH4 and N2O in a tropical forest on upland soil during the dry to wet season transition.GLOBAL CHANGE BIOLOGY,25(1),361-372. |
MLA | Welch, Bertie,et al."Tree stem bases are sources of CH4 and N2O in a tropical forest on upland soil during the dry to wet season transition".GLOBAL CHANGE BIOLOGY 25.1(2019):361-372. |
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