globalchange  > 气候减缓与适应
DOI: 10.1111/ele.12634
Scopus记录号: 2-s2.0-84978164245
论文题名:
Impacts of warming and elevated CO2 on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time
作者: Mueller K.E.; Blumenthal D.M.; Pendall E.; Carrillo Y.; Dijkstra F.A.; Williams D.G.; Follett R.F.; Morgan J.A.
刊名: Ecology letters
ISSN: 14610248
EISSN: 1461-0248
出版年: 2016
卷: 19, 期:8
起始页码: 956
结束页码: 966
语种: 英语
英文关键词: Artemisia frigida ; Bouteloua gracilis ; C3 grass ; C4 grass ; climate change ; forb ; nitrogen ; plant productivity ; root biomass ; soil moisture
Scopus关键词: carbon dioxide ; rain ; chemistry ; climate change ; grassland ; time factor ; Carbon Dioxide ; Climate Change ; Grassland ; Rain ; Time Factors ; Artemisia frigida ; Bouteloua gracilis ; Poaceae
英文摘要: It is unclear how elevated CO2 (eCO2 ) and the corresponding shifts in temperature and precipitation will interact to impact ecosystems over time. During a 7-year experiment in a semi-arid grassland, the response of plant biomass to eCO2 and warming was largely regulated by interannual precipitation, while the response of plant community composition was more sensitive to experiment duration. The combined effects of eCO2 and warming on aboveground plant biomass were less positive in 'wet' growing seasons, but total plant biomass was consistently stimulated by ~ 25% due to unique, supra-additive responses of roots. Independent of precipitation, the combined effects of eCO2 and warming on C3 graminoids became increasingly positive and supra-additive over time, reversing an initial shift toward C4 grasses. Soil resources also responded dynamically and non-additively to eCO2 and warming, shaping the plant responses. Our results suggest grasslands are poised for drastic changes in function and highlight the need for long-term, factorial experiments. © 2016 John Wiley & Sons Ltd/CNRS.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107743
Appears in Collections:气候减缓与适应

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作者单位: Rangeland Resources Research Unit, Agricultural Research Service, United States Department of Agriculture, Fort Collins, CO, 80526, USA; Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, 2751, Australia; Centre for Carbon, Water and Food, Faculty of Agriculture and Environment, School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia; Department of Botany, University of Wyoming, Laramie, WY, 82071, USA; Soil Plant and Nutrient Research Unit, Agricultural Research Service, United States Department of Agriculture, Fort Collins, CO, 80526, USA

Recommended Citation:
Mueller K.E.,Blumenthal D.M.,Pendall E.,et al. Impacts of warming and elevated CO2 on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time[J]. Ecology letters,2016-01-01,19(8)
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