Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1905912116 |
Disentangling the role of photosynthesis and stomatal conductance on rising forest water-use efficiency | |
Guerrieri, Rossella1,2; Belmecheri, Soumaya3; Ollinger, Scott V.1; Asbjornsen, Heidi1; Jennings, Katie1; Xiao, Jingfeng1; Stocker, Benjamin D.2; Martin, Mary1; Hollinger, David Y.4; Bracho-Garrillo, Rosvel5; Clark, Kenneth6; Dore, Sabina7; Kolb, Thomas7; Munger, J. William8; Novick, Kimberly9; Richardson, Andrew D.10,11 | |
2019 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2019 |
卷号 | 116期号:34页码:16909-16914 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Spain |
英文摘要 | Multiple lines of evidence suggest that plant water-use efficiency (WUE)-the ratio of carbon assimilation to water loss-has increased in recent decades. Although rising atmospheric CO2 has been proposed as the principal cause, the underlying physiological mechanisms are still being debated, and implications for the global water cycle remain uncertain. Here, we addressed this gap using 30-y tree ring records of carbon and oxygen isotope measurements and basal area increment from 12 species in 8 North American mature temperate forests. Our goal was to separate the contributions of enhanced photosynthesis and reduced stomatal conductance to WUE trends and to assess consistency between multiple commonly used methods for estimating WUE. Our results show that tree ring-derived estimates of increases in WUE are consistent with estimates from atmospheric measurements and predictions based on an optimal balancing of carbon gains and water costs, but are lower than those based on ecosystem scale flux observations. Although both physiological mechanisms contributed to rising WUE, enhanced photosynthesis was widespread, while reductions in stomatal conductance were modest and restricted to species that experienced moisture limitations. This finding challenges the hypothesis that rising WUE in forests is primarily the result of widespread, CO2-induced reductions in stomatal conductance. |
英文关键词 | tree rings stable isotopes water-use efficiency AmeriFlux CO2 fertilization |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481935500042 |
WOS关键词 | CARBON-ISOTOPE DISCRIMINATION ; EDDY COVARIANCE ; CANOPY NITROGEN ; STABLE-ISOTOPES ; CO2 ; CLIMATE ; LEAF ; ASSIMILATION ; ENRICHMENT ; TEMPERATE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/205161 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ New Hampshire, Earth Syst Res Ctr, Durham, NH 03824 USA; 2.Univ Autonoma Barcelona, Ctr Ecol Res & Forestry Applicat, Barcelona 08290, Spain; 3.Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA; 4.ARS, Northern Res Stn, USDA, Durham, NH 03824 USA; 5.Univ Florida, Sch Forest Resources & Conservat, Gainesville, FL 32611 USA; 6.US Forest Serv, Silas Little Expt Forest, Northern Res Stn, USDA, New Lisbon, NJ 08064 USA; 7.No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011 USA; 8.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 9.Indiana Univ, Sch Publ & Environm Affairs, Bloomington, IN 47405 USA; 10.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA; 11.No Arizona Univ, Sch Informat Comp & Cyber Syst, Flagstaff, AZ 86011 USA |
推荐引用方式 GB/T 7714 | Guerrieri, Rossella,Belmecheri, Soumaya,Ollinger, Scott V.,et al. Disentangling the role of photosynthesis and stomatal conductance on rising forest water-use efficiency[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(34):16909-16914. |
APA | Guerrieri, Rossella.,Belmecheri, Soumaya.,Ollinger, Scott V..,Asbjornsen, Heidi.,Jennings, Katie.,...&Richardson, Andrew D..(2019).Disentangling the role of photosynthesis and stomatal conductance on rising forest water-use efficiency.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(34),16909-16914. |
MLA | Guerrieri, Rossella,et al."Disentangling the role of photosynthesis and stomatal conductance on rising forest water-use efficiency".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.34(2019):16909-16914. |
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