Thermal limits of leaf metabolism across biomes
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, limiti...
Published in: | Global Change Biology |
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Language: | English |
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U.K., Wiley Blackwell
2017
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Online Access: | http://handle.uws.edu.au:8081/1959.7/uws:37835 https://doi.org/10.1111/gcb.13477 |
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ftunivwestsyd:oai:researchdirect.westernsydney.edu.au:uws_37835 2023-05-15T15:02:16+02:00 Thermal limits of leaf metabolism across biomes O'Sullivan, Odhran S. Heskel, Mary A. Reich, Peter B. (R16861) Tjoelker, Mark G. (R16688) Weerasinghe, K. W. Lasantha K. Penillard, Aurore Zhu, Lingling Egerton, John J. Bloomfield, Keith J. Creek, Danielle (S31473) Bahar, Nur H. Griffin, Kevin L. Hurry, Vaughan Meir, Patrick Turnbull, Matthew H. Atkin, Owen K. Hawkesbury Institute for the Environment (Host institution) 2017 print 15 http://handle.uws.edu.au:8081/1959.7/uws:37835 https://doi.org/10.1111/gcb.13477 eng eng U.K., Wiley Blackwell ARC DP0986823; DP130101252; CE140100008; FT0991448; DP140103415; FT110100457 Global Change Biology--1354-1013--1365-2486 Vol. 23 Issue. 1 pp: 209-223 http://purl.org/au-research/grants/arc/DP140103415 http://purl.org/au-research/grants/arc/DP0986823 http://purl.org/au-research/grants/arc/DP130101252 http://purl.org/au-research/grants/arc/CE140100008 http://purl.org/au-research/grants/arc/FT0991448 http://purl.org/au-research/grants/arc/FT110100457 XXXXXX - Unknown heat waves (meteorology) high temperatures photosynthesis respiration journal article Text 2017 ftunivwestsyd https://doi.org/10.1111/gcb.13477 2020-12-05T17:57:06Z 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 Tcrit (high temperature where minimal chlorophyll a fluorescence rises rapidly and thus photosystem II is disrupted) and Tmax (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 Tcrit values ranged from 41.5 °C in the Alaskan arctic to 50.8 °C in lowland tropical rainforests of Peruvian Amazon. For Tmax, the equivalent values were 51.0 and 60.6 °C in the Arctic and Amazon, respectively. Tcrit and Tmax followed similar biogeographic patterns, increasing linearly (˜8 °C) from polar to equatorial regions. Such increases in high-temperature tolerance are much less than expected based on the 20 °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 (~20-50°) 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 Tcrit and Tmax, 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. Article in Journal/Newspaper Arctic Climate change University of Western Sydney (UWS): Research Direct Arctic Global Change Biology 23 1 209 223 |
institution |
Open Polar |
collection |
University of Western Sydney (UWS): Research Direct |
op_collection_id |
ftunivwestsyd |
language |
English |
topic |
XXXXXX - Unknown heat waves (meteorology) high temperatures photosynthesis respiration |
spellingShingle |
XXXXXX - Unknown heat waves (meteorology) high temperatures photosynthesis respiration O'Sullivan, Odhran S. Heskel, Mary A. Reich, Peter B. (R16861) Tjoelker, Mark G. (R16688) Weerasinghe, K. W. Lasantha K. Penillard, Aurore Zhu, Lingling Egerton, John J. Bloomfield, Keith J. Creek, Danielle (S31473) Bahar, Nur H. Griffin, Kevin L. Hurry, Vaughan Meir, Patrick Turnbull, Matthew H. Atkin, Owen K. Thermal limits of leaf metabolism across biomes |
topic_facet |
XXXXXX - Unknown heat waves (meteorology) high temperatures photosynthesis respiration |
description |
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 Tcrit (high temperature where minimal chlorophyll a fluorescence rises rapidly and thus photosystem II is disrupted) and Tmax (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 Tcrit values ranged from 41.5 °C in the Alaskan arctic to 50.8 °C in lowland tropical rainforests of Peruvian Amazon. For Tmax, the equivalent values were 51.0 and 60.6 °C in the Arctic and Amazon, respectively. Tcrit and Tmax followed similar biogeographic patterns, increasing linearly (˜8 °C) from polar to equatorial regions. Such increases in high-temperature tolerance are much less than expected based on the 20 °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 (~20-50°) 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 Tcrit and Tmax, 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. |
author2 |
Hawkesbury Institute for the Environment (Host institution) |
format |
Article in Journal/Newspaper |
author |
O'Sullivan, Odhran S. Heskel, Mary A. Reich, Peter B. (R16861) Tjoelker, Mark G. (R16688) Weerasinghe, K. W. Lasantha K. Penillard, Aurore Zhu, Lingling Egerton, John J. Bloomfield, Keith J. Creek, Danielle (S31473) Bahar, Nur H. Griffin, Kevin L. Hurry, Vaughan Meir, Patrick Turnbull, Matthew H. Atkin, Owen K. |
author_facet |
O'Sullivan, Odhran S. Heskel, Mary A. Reich, Peter B. (R16861) Tjoelker, Mark G. (R16688) Weerasinghe, K. W. Lasantha K. Penillard, Aurore Zhu, Lingling Egerton, John J. Bloomfield, Keith J. Creek, Danielle (S31473) Bahar, Nur H. Griffin, Kevin L. Hurry, Vaughan Meir, Patrick Turnbull, Matthew H. Atkin, Owen K. |
author_sort |
O'Sullivan, Odhran S. |
title |
Thermal limits of leaf metabolism across biomes |
title_short |
Thermal limits of leaf metabolism across biomes |
title_full |
Thermal limits of leaf metabolism across biomes |
title_fullStr |
Thermal limits of leaf metabolism across biomes |
title_full_unstemmed |
Thermal limits of leaf metabolism across biomes |
title_sort |
thermal limits of leaf metabolism across biomes |
publisher |
U.K., Wiley Blackwell |
publishDate |
2017 |
url |
http://handle.uws.edu.au:8081/1959.7/uws:37835 https://doi.org/10.1111/gcb.13477 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_relation |
ARC DP0986823; DP130101252; CE140100008; FT0991448; DP140103415; FT110100457 Global Change Biology--1354-1013--1365-2486 Vol. 23 Issue. 1 pp: 209-223 http://purl.org/au-research/grants/arc/DP140103415 http://purl.org/au-research/grants/arc/DP0986823 http://purl.org/au-research/grants/arc/DP130101252 http://purl.org/au-research/grants/arc/CE140100008 http://purl.org/au-research/grants/arc/FT0991448 http://purl.org/au-research/grants/arc/FT110100457 |
op_doi |
https://doi.org/10.1111/gcb.13477 |
container_title |
Global Change Biology |
container_volume |
23 |
container_issue |
1 |
container_start_page |
209 |
op_container_end_page |
223 |
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1766334237685841920 |