期刊
NEW PHYTOLOGIST
卷 222, 期 1, 页码 35-51出版社
WILEY
DOI: 10.1111/nph.15624
关键词
anaerobic metabolism; climate; forest; greenhouse gases; methane (CH4); methane oxidation; tree; tree microorganism
资金
- US Department of Energy Terrestrial Ecosystem Science Program [DE-SC0008165]
- National Science Foundation [NSF DGE-1405135]
- U.S. Department of Energy (DOE) [DE-SC0008165] Funding Source: U.S. Department of Energy (DOE)
Forest ecosystem methane (CH4) research has focused on soils, but trees are also important sources and sinks in forest CH4 budgets. Living and dead trees transport and emit CH4 produced in soils; living trees and dead wood emit CH4 produced inside trees by microorganisms; and trees produce CH4 through an abiotic photochemical process. Here, we review the state of the science on the production, consumption, transport, and emission of CH4 by living and dead trees, and the spatial and temporal dynamics of these processes across hydrologic gradients inclusive of wetland and upland ecosystems. Emerging research demonstrates that tree CH4 emissions can significantly increase the source strength of wetland forests, and modestly decrease the sink strength of upland forests. Scaling from stem or leaf measurements to trees or forests is limited by knowledge of the mechanisms by which trees transport soil-produced CH4, microbial processes produce and oxidize CH4 inside trees, a lack of mechanistic models, the diffuse nature of forest CH4 fluxes, complex overlap between sources and sinks, and extreme variation across individuals. Understanding the complex processes that regulate CH4 source-sink dynamics in trees and forests requires cross-disciplinary research and new conceptual models that transcend the traditional binary classification of wetland vs upland forest.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据