DOI: 10.1111/gcb.12995
论文题名: Nitrous oxide and methane emissions from cryptogamic covers
作者: Lenhart K. ; Weber B. ; Elbert W. ; Steinkamp J. ; Clough T. ; Crutzen P. ; Pöschl U. ; Keppler F.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 10 起始页码: 3889
结束页码: 3900
语种: 英语
英文关键词: Cryptogamic covers
; Global change
; Global upscaling
; Methane
; Nitrous oxide
Scopus关键词: carbon dioxide
; deposition
; forest ecosystem
; global change
; greenhouse gas
; methane
; nitrogen
; nitrous oxide
; relative humidity
; temperature
; bryophytes
; air pollutant
; methane
; nitrous oxide
; air pollutant
; analysis
; Australia
; cyanobacterium
; environmental monitoring
; Europe
; fungus
; greenhouse effect
; lichen (organism)
; metabolism
; microalga
; moss
; New Zealand
; theoretical model
; Air Pollutants
; Australia
; Bryophyta
; Cyanobacteria
; Environmental Monitoring
; Europe
; Fungi
; Greenhouse Effect
; Lichens
; Methane
; Microalgae
; Models, Theoretical
; New Zealand
; Nitrous Oxide
英文摘要: Cryptogamic covers, which comprise some of the oldest forms of terrestrial life on Earth (Lenton & Huntingford,), have recently been found to fix large amounts of nitrogen and carbon dioxide from the atmosphere (Elbert et al.,). Here we show that they are also greenhouse gas sources with large nitrous oxide (N2 O) and small methane (CH4 ) emissions. Whilst N2 O emission rates varied with temperature, humidity, and N deposition, an almost constant ratio with respect to respiratory CO2 emissions was observed for numerous lichens and bryophytes. We employed this ratio together with respiration data to calculate global and regional N2 O emissions. If our laboratory measurements are typical for lichens and bryophytes living on ground and plant surfaces and scaled on a global basis, we estimate a N2 O source strength of 0.32-0.59 Tg year-1 for the global N2 O emissions from cryptogamic covers. Thus, our emission estimate might account for 4-9% of the global N2 O budget from natural terrestrial sources. In a wide range of arid and forested regions, cryptogamic covers appear to be the dominant source of N2 O. We suggest that greenhouse gas emissions associated with this source might increase in the course of global change due to higher temperatures and enhanced nitrogen deposition. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61666
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, Mainz, Germany; Department of Plant Ecology, Justus-Liebig-University, Heinrich-Buff-Ring 26-32, Gießen, Germany; Institute of Earth Sciences, University of Heidelberg, Im Neuenheimer Feld 234-236, Heidelberg, Germany; Senckenberg Biodiversity and Climate Research Centre, Senckenberganlage 25, Frankfurt am Main, Germany; Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln, New Zealand
Recommended Citation:
Lenhart K.,Weber B.,Elbert W.,et al. Nitrous oxide and methane emissions from cryptogamic covers[J]. Global Change Biology,2015-01-01,21(10)