globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12549
论文题名:
Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration
作者: Mclaughlin B.C.; Xu C.-Y.; Rastetter E.B.; Griffin K.L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:6
起始页码: 1901
结束页码: 1912
语种: 英语
英文关键词: Acclimation ; Arctic ; Betula nana ; Climate change ; Eriophorum vaginatum ; Kok effect ; Tundra
Scopus关键词: acclimation ; carbon balance ; climate change ; climate effect ; ecosystem dynamics ; environmental change ; functional group ; global warming ; inhibition ; light effect ; plant ; prediction ; respiration ; tundra ; Arctic Ocean ; Betula nana ; Eriophorum vaginatum ; acclimatization ; angiosperm ; Arctic ; biological model ; birch ; carbon cycle ; evapotranspiration ; greenhouse effect ; heat ; physiology ; plant leaf ; species difference ; sunlight ; time ; Acclimatization ; Angiosperms ; Arctic Regions ; Betula ; Carbon Cycle ; Global Warming ; Hot Temperature ; Models, Biological ; Plant Leaves ; Plant Transpiration ; Species Specificity ; Sunlight ; Time Factors
英文摘要: The carbon balance of Arctic ecosystems is particularly sensitive to global environmental change. Leaf respiration (R), a temperature-dependent key process in determining the carbon balance, is not well-understood in Arctic plants. The potential for plants to acclimate to warmer conditions could strongly impact future global carbon balance. Two key unanswered questions are (1) whether short-term temperature responses can predict long-term respiratory responses to growth in elevated temperatures and (2) to what extent the constant daylight conditions of the Arctic growing season inhibit leaf respiration. In two dominant Arctic species E riophorum vaginatum (tussock grass) and B etula nana (woody shrub), we assessed the extent of respiratory inhibition in the light (R L/R D), respiratory response to short-term temperature change, and respiratory acclimation to long-term warming treatments. We found that R of both species is strongly inhibited by light (averaging 35% across all measurement temperatures). In E . vaginatum both R L and R D acclimated to the long-term warming treatment, reducing the magnitude of respiratory response relative to the short-term response to temperature increase. In B . nana, both R L and R D responded to short-term temperature increase but showed no acclimation to the long-term warming. The ability to predict plant respiratory response to global warming with short-term temperature responses will depend on species-specific acclimation potential and the differential response of R L and R D to temperature. With projected woody shrub encroachment in Arctic tundra and continued warming, changing species dominance between these two functional groups, may impact ecosystem respiratory response and carbon balance. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62030
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Integrative Biology, University of California at Berkeley, 3060 Valley Life Sciences Building, Berkeley, CA, 94720, United States; Environmental Futures Research Institute, Griffith University, 170 Kessels Road, Nathan, Qld, 4111, Australia; Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, DC Qld, 4558, Australia; The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA, 02543, United States; Departments of Earth and Environmental Sciences and Ecology, Evolution and Environmental Biology, Columbia University, 1200 Amsterdam Avenue, Schermerhorn Extension, New York, NY, 10027, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, 10964, United States

Recommended Citation:
Mclaughlin B.C.,Xu C.-Y.,Rastetter E.B.,et al. Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration[J]. Global Change Biology,2014-01-01,20(6)
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