globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12938
论文题名:
Constraints to nitrogen acquisition of terrestrial plants under elevated CO2
作者: Feng Z.; Rütting T.; Pleijel H.; Wallin G.; Reich P.B.; Kammann C.I.; Newton P.C.D.; Kobayashi K.; Luo Y.; Uddling J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期:8
起始页码: 3152
结束页码: 3168
语种: 英语
英文关键词: Carbon dioxide ; Crops ; Diversity ; FACE ; Fertilization ; Forest ; Grassland ; Growth dilution ; Meta-analysis ; Nitrogen
Scopus关键词: agricultural land ; carbon dioxide ; climate change ; forest ecosystem ; grassland ; growth ; meta-analysis ; nitrogen ; nutrient limitation ; plant ; species diversity ; carbon dioxide ; nitrogen ; agriculture ; climate change ; ecosystem ; forest ; metabolism ; plant ; Poaceae ; Agriculture ; Carbon Dioxide ; Climate Change ; Ecosystem ; Forests ; Nitrogen ; Plants ; Poaceae
英文摘要: A key part of the uncertainty in terrestrial feedbacks on climate change is related to how and to what extent nitrogen (N) availability constrains the stimulation of terrestrial productivity by elevated CO2 (eCO2), and whether or not this constraint will become stronger over time. We explored the ecosystem-scale relationship between responses of plant productivity and N acquisition to eCO2 in free-air CO2 enrichment (FACE) experiments in grassland, cropland and forest ecosystems and found that: (i) in all three ecosystem types, this relationship was positive, linear and strong (r2 = 0.68), but exhibited a negative intercept such that plant N acquisition was decreased by 10% when eCO2 caused neutral or modest changes in productivity. As the ecosystems were markedly N limited, plants with minimal productivity responses to eCO2 likely acquired less N than ambient CO2-grown counterparts because access was decreased, and not because demand was lower. (ii) Plant N concentration was lower under eCO2, and this decrease was independent of the presence or magnitude of eCO2-induced productivity enhancement, refuting the long-held hypothesis that this effect results from growth dilution. (iii) Effects of eCO2 on productivity and N acquisition did not diminish over time, while the typical eCO2-induced decrease in plant N concentration did. Our results suggest that, at the decennial timescale covered by FACE studies, N limitation of eCO2-induced terrestrial productivity enhancement is associated with negative effects of eCO2 on plant N acquisition rather than with growth dilution of plant N or processes leading to progressive N limitation. © 2015 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/61552
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Biological and Environmental Sciences, University of Gothenburg, P.O. Box 461, Gothenburg, Sweden; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, China; Department of Earth Sciences, University of Gothenburg, P.O. Box 460, Gothenburg, Sweden; Department of Forest Resources, University of Minnesota, 1530 Cleveland Avenue North, St. Paul, MN, United States; Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, NSW, Australia; Department of Plant Ecology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, Giessen, Germany; AgResearch Grasslands, Private Bag 11008, Palmerston North, New Zealand; Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, Japan; Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China

Recommended Citation:
Feng Z.,Rütting T.,Pleijel H.,et al. Constraints to nitrogen acquisition of terrestrial plants under elevated CO2[J]. Global Change Biology,2015-01-01,21(8)
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