Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1816686116 |
North America's oldest boreal trees are more efficient water users due to increased [CO2], but do not grow faster | |
Giguere-Croteau, Claudie1,2,3; Boucher, Etienne2,4,5; Bergeron, Yves1,3,6; Girardin, Martin P.7; Drobyshev, Igor3,6; Silva, Lucas C. R.8; Helie, Jean-Francois2,9; Garneau, Michelle2,4,5 | |
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:7页码:2749-2754 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA |
英文摘要 | Due to anthropogenic emissions and changes in land use, trees are now exposed to atmospheric levels of [CO2] that are unprecedented for 650,000 y [Luthi et al. (2008) Nature 453: 379-382] (thousands of tree generations). Trees are expected to acclimate by modulating leaf-gas exchanges and alter water use efficiency which may result in forest productivity changes. Here, we present evidence of one of the strongest, nonlinear, and unequivocal postindustrial increases in intrinsic water use efficiency (iWUE) ever documented (+59%). A dual-isotope tree-ring analysis (delta C-13 and delta O-18) covering 715 y of growth of North America's oldest boreal trees (Thuja occidentalis L.) revealed an unprecedented increase in iWUE that was directly linked to elevated assimilation rates of CO2 (A). However, limited nutrient availability, changes in carbon allocation strategies, and changes in stomatal density may have offset stem growth benefits awarded by the increased iWUE. Our results demonstrate that even in scenarios where a positive CO2 fertilization effect is observed, other mechanisms may prevent trees from assimilating and storing supplementary anthropogenic emissions as above-ground biomass. In such cases, the sink capacity of forests in response to changing atmospheric conditions might be overestimated. |
英文关键词 | water use efficiency carbon dioxide stable isotopes productivity boreal forest |
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:000458365600055 |
WOS关键词 | CARBON-ISOTOPE DISCRIMINATION ; DIOXIDE CONCENTRATION ; STOMATAL CONDUCTANCE ; THUJA-OCCIDENTALIS ; STABLE-ISOTOPES ; ATMOSPHERIC CO2 ; RING CELLULOSE ; FOREST ; CLIMATE ; OXYGEN |
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/205222 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Quebec Montreal, Dept Biol, Montreal, PQ H2X 1Y4, Canada; 2.Univ Quebec Montreal, GEOTOP, Montreal, PQ H2X 1Y4, Canada; 3.Univ Quebec Montreal, Ctr Etud Foret, Montreal, PQ H2X 1Y4, Canada; 4.Univ Quebec Montreal, Dept Geog, Montreal, PQ H2X 3R9, Canada; 5.Univ Laval, Ctr Etud Nord, Quebec City, PQ G1V 0A6, Canada; 6.Univ Quebec Abitibi Temiscamingue, Inst Rech Forets, Rouyn Noranda, PQ J9X 5E4, Canada; 7.Ressources Nat Canada, Ctr Foresterie Laurentides, Ste Foy, PQ G1V 4C7, Canada; 8.Univ Oregon, Dept Geog, Inst Ecol & Evolut, Environm Studies Program, Eugene, OR 97403 USA; 9.Univ Quebec Montreal, Dept Earth & Atmosphere Sci, Montreal, PQ H2X 3Y7, Canada |
推荐引用方式 GB/T 7714 | Giguere-Croteau, Claudie,Boucher, Etienne,Bergeron, Yves,et al. North America's oldest boreal trees are more efficient water users due to increased [CO2], but do not grow faster[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(7):2749-2754. |
APA | Giguere-Croteau, Claudie.,Boucher, Etienne.,Bergeron, Yves.,Girardin, Martin P..,Drobyshev, Igor.,...&Garneau, Michelle.(2019).North America's oldest boreal trees are more efficient water users due to increased [CO2], but do not grow faster.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(7),2749-2754. |
MLA | Giguere-Croteau, Claudie,et al."North America's oldest boreal trees are more efficient water users due to increased [CO2], but do not grow faster".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.7(2019):2749-2754. |
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