Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13477 |
Thermal limits of leaf metabolism across biomes | |
O&1; 39;Sullivan, Odhran S.2 | |
2017 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; England; USA; Sri Lanka; Sweden; Scotland; New Zealand |
英文摘要 | High-temperature tolerance in plants is important in a warming world, with extreme heat waves predicted to increase in frequency and duration, potentially leading to lethal heating of leaves. Global patterns of high-temperature tolerance are documented in animals, but generally not in plants, limiting our ability to assess risks associated with climate warming. To assess whether there are global patterns in high-temperature tolerance of leaf metabolism, we quantified T-crit (high temperature where minimal chlorophyll a fluorescence rises rapidly and thus photosystem II is disrupted) and T-max (temperature where leaf respiration in darkness is maximal, beyond which respiratory function rapidly declines) in upper canopy leaves of 218 plant species spanning seven biomes. Mean site-based T-crit values ranged from 41.5 degrees C in the Alaskan arctic to 50.8 degrees C in lowland tropical rainforests of Peruvian Amazon. For T-max, the equivalent values were 51.0 and 60.6 degrees C in the Arctic and Amazon, respectively. T-crit and T-max followed similar biogeographic patterns, increasing linearly (similar to 8 degrees C) from polar to equatorial regions. Such increases in high-temperature tolerance are much less than expected based on the 20 degrees C span in high-temperature extremes across the globe. Moreover, with only modest high-temperature tolerance despite high summer temperature extremes, species in mid-latitude (similar to 20-50 degrees) regions have the narrowest thermal safety margins in upper canopy leaves; these regions are at the greatest risk of damage due to extreme heat-wave events, especially under conditions when leaf temperatures are further elevated by a lack of transpirational cooling. Using predicted heat-wave events for 2050 and accounting for possible thermal acclimation of T-crit and T-max, we also found that these safety margins could shrink in a warmer world, as rising temperatures are likely to exceed thermal tolerance limits. Thus, increasing numbers of species in many biomes may be at risk as heat-wave events become more severe with climate change. |
英文关键词 | heat waves high-temperature tolerance latitudinal patterns photosynthesis respiration T-crit temperature extremes T-max |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000390218300018 |
WOS关键词 | PHOTOSYNTHETIC ELECTRON-TRANSPORT ; HEAT-SHOCK PROTEINS ; HIGH-TEMPERATURE ; ELEVATED CO2 ; THYLAKOID MEMBRANES ; GLOBAL CONVERGENCE ; WATER AVAILABILITY ; PLANT-RESPONSES ; DESERT PLANTS ; GAS-EXCHANGE |
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/16784 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Australian Natl Univ, Res Sch Biol, Div Plant Sci, Bldg 46, Canberra, ACT 2601, Australia; 2.Univ Sheffield, Dept Anim & Plant Sci, Western Bank, Alfred Denny Bldg, Sheffield S10 2TN, S Yorkshire, England; 3.Marine Biol Lab, Ctr Ecosyst, Woods Hole, MA 02544 USA; 4.Univ Western Sydney, Hawkesbury Inst Environm, Penrith, NSW 2751, Australia; 5.Univ Minnesota, Dept Forest Resources, 1530 Cleveland Ave North, St Paul, MN 55108 USA; 6.Univ Peradeniya, Fac Agr, Peradeniya 20400, Sri Lanka; 7.Australian Natl Univ, Res Sch Biol, ARC Ctr Excellence Plant Energy Biol, Bldg 134, Canberra, ACT 2601, Australia; 8.Columbia Univ, Dept Earth & Environm Sci, Palisades, NY 10964 USA; 9.Swedish Univ Agr Sci, Dept Forest Genet & Plant Physiol, Umea Plant Sci Ctr, SE-90184 Umea, Sweden; 10.Univ Edinburgh, Sch Geosci, Edinburgh EH9 3FF, Midlothian, Scotland; 11.Univ Canterbury, Sch Biol Sci, Ctr Integrat Ecol, Private Bag 4800, Christchurch, New Zealand |
推荐引用方式 GB/T 7714 | O&,39;Sullivan, Odhran S.. Thermal limits of leaf metabolism across biomes[J]. GLOBAL CHANGE BIOLOGY,2017,23(1). |
APA | O&,&39;Sullivan, Odhran S..(2017).Thermal limits of leaf metabolism across biomes.GLOBAL CHANGE BIOLOGY,23(1). |
MLA | O&,et al."Thermal limits of leaf metabolism across biomes".GLOBAL CHANGE BIOLOGY 23.1(2017). |
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