DOI: 10.1111/gcb.12248
论文题名: Net primary productivity and rain-use efficiency as affected by warming, altered precipitation, and clipping in a mixed-grass prairie
作者: Xu X. ; Sherry R.A. ; Niu S. ; Li D. ; Luo Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 9 起始页码: 2753
结束页码: 2764
语种: 英语
英文关键词: Above- and belowground net primary productivity
; Climate change
; Clipping
; Mixed-grass prairie
; Net primary productivity partitioning
; Rain-use efficiency
Scopus关键词: rain
; climate change
; grass
; land use
; net primary production
; partitioning
; prairie
; precipitation (climatology)
; soil moisture
; soil temperature
; above- and belowground net primary productivity
; article
; climate change
; clipping
; ecosystem
; microclimate
; mixed-grass prairie
; net primary productivity partitioning
; Poaceae
; rain-use efficiency
; soil
; United States
; above- and belowground net primary productivity
; climate change
; clipping
; mixed-grass prairie
; net primary productivity partitioning
; rain-use efficiency
; Ecosystem
; Microclimate
; Oklahoma
; Poaceae
; Rain
; Soil
; Oklahoma [United States]
; United States
英文摘要: Grassland productivity in response to climate change and land use is a global concern. In order to explore the effects of climate change and land use on net primary productivity (NPP), NPP partitioning [fBNPP, defined as the fraction of belowground NPP (BNPP) to NPP], and rain-use efficiency (RUE) of NPP, we conducted a field experiment with warming (+3 °C), altered precipitation (double and half), and annual clipping in a mixed-grass prairie in Oklahoma, USA since July, 2009. Across the years, warming significantly increased BNPP, fBNPP, and RUEBNPP by an average of 11.6%, 2.8%, and 6.6%, respectively. This indicates that BNPP was more sensitive to warming than aboveground NPP (ANPP) since warming did not change ANPP and RUEANPP much. Double precipitation stimulated ANPP, BNPP, and NPP but suppressed RUEANPP, RUEBNPP, and RUENPP while half precipitation decreased ANPP, BNPP, and NPP but increased RUEANPP, RUEBNPP, and RUENPP. Clipping interacted with altered precipitation in impacting RUEANPP, RUEBNPP, and RUENPP, suggesting land use could confound the effects of precipitation changes on ecosystem processes. Soil moisture was found to be a main factor in regulating variation in ANPP, BNPP, and NPP while soil temperature was the dominant factor influencing fBNPP. These findings suggest that BNPP is critical point to future research. Additionally, results from single-factor manipulative experiments should be treated with caution due to the non-additive interactive effects of warming with altered precipitation and land use (clipping). © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62338
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Microbiology and Plant Biology, University of Oklahoma, 101 David L. Boren Blvd, Norman, OK 73019, United States; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Recommended Citation:
Xu X.,Sherry R.A.,Niu S.,et al. Net primary productivity and rain-use efficiency as affected by warming, altered precipitation, and clipping in a mixed-grass prairie[J]. Global Change Biology,2013-01-01,19(9)