Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14037 |
Trees tolerate an extreme heatwave via sustained transpirational cooling and increased leaf thermal tolerance | |
Drake, John E.1,2; Tjoelker, Mark G.1; Varhammar, Angelica1; Medlyn, Belinda E.1; Reich, Peter B.1,3; Leigh, Andrea4; Pfautsch, Sebastian1; Blackman, Chris J.1; Lopez, Rosana1,5; Aspinwall, Michael J.1,6; Crous, Kristine Y.1; Duursma, Remko A.1; Kumarathunge, Dushan1; De Kauwe, Martin G.7; Jiang, Mingkai1; Nicotra, Adrienne B.8; Tissue, David T.1; Choat, Brendan1; Atkin, Owen K.9; Barton, Craig V. M.1 | |
2018-06-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:6页码:2390-2402 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; USA; France |
英文摘要 | Heatwaves are likely to increase in frequency and intensity with climate change, which may impair tree function and forest C uptake. However, we have little information regarding the impact of extreme heatwaves on the physiological performance of large trees in the field. Here, we grew Eucalyptus parramattensis trees for 1 year with experimental warming (+ 3 degrees C) in a field setting, until they were greater than 6 m tall. We withheld irrigation for 1 month to dry the surface soils and then implemented an extreme heatwave treatment of 4 consecutive days with air temperatures exceeding 43 degrees C, while monitoring whole-canopy exchange of CO2 and H2O, leaf temperatures, leaf thermal tolerance, and leaf and branch hydraulic status. The heatwave reduced midday canopy photosynthesis to near zero but transpiration persisted, maintaining canopy cooling. A standard photosynthetic model was unable to capture the observed decoupling between photosynthesis and transpiration at high temperatures, suggesting that climate models may underestimate a moderating feedback of vegetation on heatwave intensity. The heatwave also triggered a rapid increase in leaf thermal tolerance, such that leaf temperatures observed during the heatwave were maintained within the thermal limits of leaf function. All responses were equivalent for trees with a prior history of ambient and warmed (+ 3 degrees C) temperatures, indicating that climate warming conferred no added tolerance of heatwaves expected in the future. This coordinated physiological response utilizing latent cooling and adjustment of thermal thresholds has implications for tree tolerance of future climate extremes as well as model predictions of future heatwave intensity at landscape and global scales. |
英文关键词 | climate change Eucalyptus parramattensis heatwave latent cooling photosynthesis temperature thermal tolerance warming |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433717700015 |
WOS关键词 | MODELING STOMATAL CONDUCTANCE ; WATER-USE EFFICIENCY ; CLIMATE EXTREMES ; TEMPERATURE RESPONSES ; NET PHOTOSYNTHESIS ; CARBON-CYCLE ; ELEVATED CO2 ; PINUS-TAEDA ; ACCLIMATION ; PLANTS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/18258 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia; 2.SUNY ESF, Forest & Nat Resources Management, Syracuse, NY 13210 USA; 3.Univ Minnesota, Dept Forest Resources, St Paul, MN 55108 USA; 4.Univ Technol Sydney, Sch Life Sci, Broadway, NSW, Australia; 5.Univ Clermont Auvergne, PIAF, INRA, Clermont Ferrand, France; 6.Univ North Florida, Dept Biol, Jacksonville, FL USA; 7.Univ New South Wales, ARC Ctr Excellence Climate Extremes, Sydney, NSW, Australia; 8.Australian Natl Univ, Res Sch Biol, Div Ecol & Evolut, Canberra, ACT, Australia; 9.Australian Natl Univ, Res Sch Biol, ARC Ctr Excellence Plant Energy Biol, Canberra, ACT, Australia |
推荐引用方式 GB/T 7714 | Drake, John E.,Tjoelker, Mark G.,Varhammar, Angelica,et al. Trees tolerate an extreme heatwave via sustained transpirational cooling and increased leaf thermal tolerance[J]. GLOBAL CHANGE BIOLOGY,2018,24(6):2390-2402. |
APA | Drake, John E..,Tjoelker, Mark G..,Varhammar, Angelica.,Medlyn, Belinda E..,Reich, Peter B..,...&Barton, Craig V. M..(2018).Trees tolerate an extreme heatwave via sustained transpirational cooling and increased leaf thermal tolerance.GLOBAL CHANGE BIOLOGY,24(6),2390-2402. |
MLA | Drake, John E.,et al."Trees tolerate an extreme heatwave via sustained transpirational cooling and increased leaf thermal tolerance".GLOBAL CHANGE BIOLOGY 24.6(2018):2390-2402. |
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