Dry and hot: The hydraulic consequences of a climate change–type drought for Amazonian trees
How plants respond physiologically to leaf warming and low water availability may determine how they will perform under future climate change. In 2015 – 2016, an unprecedented drought occurred across Amazonia with record-breaking high temperatures and low soil moisture, offering a unique opportunity...
| Autor principal: | Fontes, Clarissa Gouveia |
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| Outros Autores: | Dawson, Todd E., Jardine, Kolby J., McDowell, Nathan G., Gimenez, Bruno Oliva, Anderegg, Leander D.L., Negrón-Juárez, Robinson I., Higuchi, Niro, Van Antwerp Fine, Paul, Araüjo, Alessandro Carioca de, Chambers, Jeffrey Quintin |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Philosophical Transactions of the Royal Society B: Biological Sciences
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/15594 |
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oai:repositorio:1-15594 |
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oai:repositorio:1-15594 Dry and hot: The hydraulic consequences of a climate change–type drought for Amazonian trees Fontes, Clarissa Gouveia Dawson, Todd E. Jardine, Kolby J. McDowell, Nathan G. Gimenez, Bruno Oliva Anderegg, Leander D.L. Negrón-Juárez, Robinson I. Higuchi, Niro Van Antwerp Fine, Paul Araüjo, Alessandro Carioca de Chambers, Jeffrey Quintin Climate Change Drought Stress El Nino-southern Oscillation High Temperature Hydraulic Conductivity Leaf Metabolism Mortality Physiological Response Rainforest Soil Water Xylem Amazonia Biomechanics Brasil Climate Change Drought Forest Growth, Development And Aging Heat Physiology Plant Leaf Season Species Difference Tree Xylem Biomechanical Phenomena Brasil Climate Change Droughts Forests Hot Temperature Plant Leaves Seasons Species Specificity Trees Xylem How plants respond physiologically to leaf warming and low water availability may determine how they will perform under future climate change. In 2015 – 2016, an unprecedented drought occurred across Amazonia with record-breaking high temperatures and low soil moisture, offering a unique opportunity to evaluate the performances of Amazonian trees to a severe climatic event. We quantified the responses of leaf water potential, sap velocity, whole-tree hydraulic conductance (Kwt), turgor loss and xylem embolism, during and after the 2015 – 2016 El Niño for five canopy-tree species. Leaf/xylem safety margins (SMs), sap velocity and Kwt showed a sharp drop during warm periods. SMs were negatively correlated with vapour pressure deficit, but had no significant relationship with soil water storage. Based on our calculations of canopy stomatal and xylem resistances, the decrease in sap velocity and Kwt was due to a combination of xylem cavitation and stomatal closure. Our results suggest that warm droughts greatly amplify the degree of trees’ physiological stress and can lead to mortality. Given the extreme nature of the 2015 – 2016 El Niño and that temperatures are predicted to increase, this work can serve as a case study of the possible impact climate warming can have on tropical trees. This article is part of a discussion meeting issue ‘The impact of the 2015/2016 El Niño on the terrestrial tropical carbon cycle: patterns, mechanisms and implications’. © 2018 The Author(s) Published by the Royal Society. All rights reserved. 2020-05-15T14:34:12Z 2020-05-15T14:34:12Z 2018 Artigo https://repositorio.inpa.gov.br/handle/1/15594 10.1098/rstb.2018.0209 en Volume 373, Número 1760 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Philosophical Transactions of the Royal Society B: Biological Sciences |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Climate Change Drought Stress El Nino-southern Oscillation High Temperature Hydraulic Conductivity Leaf Metabolism Mortality Physiological Response Rainforest Soil Water Xylem Amazonia Biomechanics Brasil Climate Change Drought Forest Growth, Development And Aging Heat Physiology Plant Leaf Season Species Difference Tree Xylem Biomechanical Phenomena Brasil Climate Change Droughts Forests Hot Temperature Plant Leaves Seasons Species Specificity Trees Xylem |
| spellingShingle |
Climate Change Drought Stress El Nino-southern Oscillation High Temperature Hydraulic Conductivity Leaf Metabolism Mortality Physiological Response Rainforest Soil Water Xylem Amazonia Biomechanics Brasil Climate Change Drought Forest Growth, Development And Aging Heat Physiology Plant Leaf Season Species Difference Tree Xylem Biomechanical Phenomena Brasil Climate Change Droughts Forests Hot Temperature Plant Leaves Seasons Species Specificity Trees Xylem Fontes, Clarissa Gouveia Dry and hot: The hydraulic consequences of a climate change–type drought for Amazonian trees |
| topic_facet |
Climate Change Drought Stress El Nino-southern Oscillation High Temperature Hydraulic Conductivity Leaf Metabolism Mortality Physiological Response Rainforest Soil Water Xylem Amazonia Biomechanics Brasil Climate Change Drought Forest Growth, Development And Aging Heat Physiology Plant Leaf Season Species Difference Tree Xylem Biomechanical Phenomena Brasil Climate Change Droughts Forests Hot Temperature Plant Leaves Seasons Species Specificity Trees Xylem |
| description |
How plants respond physiologically to leaf warming and low water availability may determine how they will perform under future climate change. In 2015 – 2016, an unprecedented drought occurred across Amazonia with record-breaking high temperatures and low soil moisture, offering a unique opportunity to evaluate the performances of Amazonian trees to a severe climatic event. We quantified the responses of leaf water potential, sap velocity, whole-tree hydraulic conductance (Kwt), turgor loss and xylem embolism, during and after the 2015 – 2016 El Niño for five canopy-tree species. Leaf/xylem safety margins (SMs), sap velocity and Kwt showed a sharp drop during warm periods. SMs were negatively correlated with vapour pressure deficit, but had no significant relationship with soil water storage. Based on our calculations of canopy stomatal and xylem resistances, the decrease in sap velocity and Kwt was due to a combination of xylem cavitation and stomatal closure. Our results suggest that warm droughts greatly amplify the degree of trees’ physiological stress and can lead to mortality. Given the extreme nature of the 2015 – 2016 El Niño and that temperatures are predicted to increase, this work can serve as a case study of the possible impact climate warming can have on tropical trees. This article is part of a discussion meeting issue ‘The impact of the 2015/2016 El Niño on the terrestrial tropical carbon cycle: patterns, mechanisms and implications’. © 2018 The Author(s) Published by the Royal Society. All rights reserved. |
| format |
Artigo |
| author |
Fontes, Clarissa Gouveia |
| author2 |
Dawson, Todd E. Jardine, Kolby J. McDowell, Nathan G. Gimenez, Bruno Oliva Anderegg, Leander D.L. Negrón-Juárez, Robinson I. Higuchi, Niro Van Antwerp Fine, Paul Araüjo, Alessandro Carioca de Chambers, Jeffrey Quintin |
| author2Str |
Dawson, Todd E. Jardine, Kolby J. McDowell, Nathan G. Gimenez, Bruno Oliva Anderegg, Leander D.L. Negrón-Juárez, Robinson I. Higuchi, Niro Van Antwerp Fine, Paul Araüjo, Alessandro Carioca de Chambers, Jeffrey Quintin |
| title |
Dry and hot: The hydraulic consequences of a climate change–type drought for Amazonian trees |
| title_short |
Dry and hot: The hydraulic consequences of a climate change–type drought for Amazonian trees |
| title_full |
Dry and hot: The hydraulic consequences of a climate change–type drought for Amazonian trees |
| title_fullStr |
Dry and hot: The hydraulic consequences of a climate change–type drought for Amazonian trees |
| title_full_unstemmed |
Dry and hot: The hydraulic consequences of a climate change–type drought for Amazonian trees |
| title_sort |
dry and hot: the hydraulic consequences of a climate change–type drought for amazonian trees |
| publisher |
Philosophical Transactions of the Royal Society B: Biological Sciences |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/15594 |
| _version_ |
1787141308101427200 |
| score |
11.680425 |