DOI: 10.1111/gcb.12953
论文题名: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions
作者: Valolahti H. ; Kivimäenpää M. ; Faubert P. ; Michelsen A. ; Rinnan R.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 9 起始页码: 3478
结束页码: 3488
语种: 英语
英文关键词: Arctic
; BVOCs
; Climate change
; Isoprene
; Monoterpene
; Plant volatiles
; Sesquiterpene
; Temperature
; Vegetation change
Scopus关键词: biogenic emission
; climate change
; climate effect
; isoprene
; monoterpene
; temperature effect
; vegetation dynamics
; volatile organic compound
; Abisko
; Norrbotten
; Sweden
; volatile organic compound
; birch
; chemistry
; climate change
; ecosystem
; greenhouse effect
; mass fragmentography
; plant leaf
; season
; Sweden
; Betula
; Climate Change
; Ecosystem
; Gas Chromatography-Mass Spectrometry
; Global Warming
; Plant Leaves
; Seasons
; Sweden
; Volatile Organic Compounds
英文摘要: Emissions of biogenic volatile organic compounds (BVOCs) have been earlier shown to be highly temperature sensitive in subarctic ecosystems. As these ecosystems experience rapidly advancing pronounced climate warming, we aimed to investigate how warming affects the BVOC emissions in the long term (up to 13 treatment years). We also aimed to assess whether the increased litterfall resulting from the vegetation changes in the warming subarctic would affect the emissions. The study was conducted in a field experiment with factorial open-top chamber warming and annual litter addition treatments on subarctic heath in Abisko, northern Sweden. After 11 and 13 treatment years, BVOCs were sampled from plant communities in the experimental plots using a push-pull enclosure technique and collection into adsorbent cartridges during the growing season and analyzed with gas chromatography-mass spectrometry. Plant species coverage in the plots was analyzed by the point intercept method. Warming by 2 °C caused a 2-fold increase in monoterpene and 5-fold increase in sesquiterpene emissions, averaged over all measurements. When the momentary effect of temperature was diminished by standardization of emissions to a fixed temperature, warming still had a significant effect suggesting that emissions were also indirectly increased. This indirect increase appeared to result from increased plant coverage and changes in vegetation composition. The litter addition treatment also caused significant increases in the emission rates of some BVOC groups, especially when combined with warming. The combined treatment had both the largest vegetation changes and the highest BVOC emissions. The increased emissions under litter addition were probably a result of a changed vegetation composition due to alleviated nutrient limitation and stimulated microbial production of BVOCs. We suggest that the changes in the subarctic vegetation composition induced by climate warming will be the major factor indirectly affecting the BVOC emission potentials and composition. © 2015 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61682
Appears in Collections: 影响、适应和脆弱性
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作者单位: Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Copenhagen, Denmark; Center for Permafrost (CENPERM), Department of Geography and Geology, University of Copenhagen, Copenhagen, Denmark; Department of Environmental Sciences, University of Eastern Finland, Kuopio, Finland; Chaire en éco-conseil, Département des sciences fondamentales, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada
Recommended Citation:
Valolahti H.,Kivimäenpää M.,Faubert P.,et al. Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions[J]. Global Change Biology,2015-01-01,21(9)