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Title: A multi-species synthesis of physiological mechanisms in drought-induced tree mortality

Abstract

Widespread tree mortality associated with drought has been observed on all forested continents, and global change is expected to exacerbate vegetation vulnerability. Forest mortality has implications for future biosphere-atmosphere interactions of carbon, water, and energy balance, and is poorly represented in dynamic vegetation models. Reducing uncertainty requires improved mortality projections founded on robust physiological processes. However, the proposed mechanisms of drought-induced mortality, including hydraulic failure and carbon starvation, are unresolved. A growing number of empirical studies have investigated these mechanisms, but data have not been consistently analyzed across species and biomes using a standardized physiological framework. Here we show that xylem hydraulic failure was ubiquitous across multiple tree taxa at drought-induced mortality. All species assessed had 60% or greater loss of xylem hydraulic conductivity, consistent with proposed theoretical and modelled survival thresholds. We found diverse responses in non-structural carbohydrates at mortality, indicating that evidence supporting carbon starvation was not universal. Reduced non-structural carbohydrates were more common for gymnosperms than angiosperms, associated with xylem hydraulic vulnerability, and may have a role in hydraulic deterioration. The consistent Our finding that across species of hydraulic failure at drought-induced mortality was persistent across species indicates that substantial improvement in vegetation modelling can be achievedmore » using thresholds in hydraulic function.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ORCiD logo; ; ; ; ; more »; ; ; ; ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ORCiD logo; ; ; ; ; ; ; ; ; ; ORCiD logo; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1431408
Report Number(s):
PNNL-SA-130231
Journal ID: ISSN 2397-334X
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Nature Ecology and Evolution
Additional Journal Information:
Journal Volume: 1; Journal Issue: 9; Related Information: 1285-1291; Journal ID: ISSN 2397-334X
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English

Citation Formats

Adams, Henry D., Zeppel, Melanie J. B., Anderegg, William R. L., Hartmann, Henrik, Landhäusser, Simon M., Tissue, David T., Huxman, Travis E., Hudson, Patrick J., Franz, Trenton E., Allen, Craig D., Anderegg, Leander D. L., Barron-Gafford, Greg A., Beerling, David J., Breshears, David D., Brodribb, Timothy J., Bugmann, Harald, Cobb, Richard C., Collins, Adam D., Dickman, L. Turin, Duan, Honglang, Ewers, Brent E., Galiano, Lucía, Galvez, David A., Garcia-Forner, Núria, Gaylord, Monica L., Germino, Matthew J., Gessler, Arthur, Hacke, Uwe G., Hakamada, Rodrigo, Hector, Andy, Jenkins, Michael W., Kane, Jeffrey M., Kolb, Thomas E., Law, Darin J., Lewis, James D., Limousin, Jean-Marc, Love, David M., Macalady, Alison K., Martínez-Vilalta, Jordi, Mencuccini, Maurizio, Mitchell, Patrick J., Muss, Jordan D., O’Brien, Michael J., O’Grady, Anthony P., Pangle, Robert E., Pinkard, Elizabeth A., Piper, Frida I., Plaut, Jennifer A., Pockman, William T., Quirk, Joe, Reinhardt, Keith, Ripullone, Francesco, Ryan, Michael G., Sala, Anna, Sevanto, Sanna, Sperry, John S., Vargas, Rodrigo, Vennetier, Michel, Way, Danielle A., Xu, Chonggang, Yepez, Enrico A., and McDowell, Nate G. A multi-species synthesis of physiological mechanisms in drought-induced tree mortality. United States: N. p., 2017. Web. doi:10.1038/s41559-017-0248-x.
Adams, Henry D., Zeppel, Melanie J. B., Anderegg, William R. L., Hartmann, Henrik, Landhäusser, Simon M., Tissue, David T., Huxman, Travis E., Hudson, Patrick J., Franz, Trenton E., Allen, Craig D., Anderegg, Leander D. L., Barron-Gafford, Greg A., Beerling, David J., Breshears, David D., Brodribb, Timothy J., Bugmann, Harald, Cobb, Richard C., Collins, Adam D., Dickman, L. Turin, Duan, Honglang, Ewers, Brent E., Galiano, Lucía, Galvez, David A., Garcia-Forner, Núria, Gaylord, Monica L., Germino, Matthew J., Gessler, Arthur, Hacke, Uwe G., Hakamada, Rodrigo, Hector, Andy, Jenkins, Michael W., Kane, Jeffrey M., Kolb, Thomas E., Law, Darin J., Lewis, James D., Limousin, Jean-Marc, Love, David M., Macalady, Alison K., Martínez-Vilalta, Jordi, Mencuccini, Maurizio, Mitchell, Patrick J., Muss, Jordan D., O’Brien, Michael J., O’Grady, Anthony P., Pangle, Robert E., Pinkard, Elizabeth A., Piper, Frida I., Plaut, Jennifer A., Pockman, William T., Quirk, Joe, Reinhardt, Keith, Ripullone, Francesco, Ryan, Michael G., Sala, Anna, Sevanto, Sanna, Sperry, John S., Vargas, Rodrigo, Vennetier, Michel, Way, Danielle A., Xu, Chonggang, Yepez, Enrico A., & McDowell, Nate G. A multi-species synthesis of physiological mechanisms in drought-induced tree mortality. United States. doi:10.1038/s41559-017-0248-x.
Adams, Henry D., Zeppel, Melanie J. B., Anderegg, William R. L., Hartmann, Henrik, Landhäusser, Simon M., Tissue, David T., Huxman, Travis E., Hudson, Patrick J., Franz, Trenton E., Allen, Craig D., Anderegg, Leander D. L., Barron-Gafford, Greg A., Beerling, David J., Breshears, David D., Brodribb, Timothy J., Bugmann, Harald, Cobb, Richard C., Collins, Adam D., Dickman, L. Turin, Duan, Honglang, Ewers, Brent E., Galiano, Lucía, Galvez, David A., Garcia-Forner, Núria, Gaylord, Monica L., Germino, Matthew J., Gessler, Arthur, Hacke, Uwe G., Hakamada, Rodrigo, Hector, Andy, Jenkins, Michael W., Kane, Jeffrey M., Kolb, Thomas E., Law, Darin J., Lewis, James D., Limousin, Jean-Marc, Love, David M., Macalady, Alison K., Martínez-Vilalta, Jordi, Mencuccini, Maurizio, Mitchell, Patrick J., Muss, Jordan D., O’Brien, Michael J., O’Grady, Anthony P., Pangle, Robert E., Pinkard, Elizabeth A., Piper, Frida I., Plaut, Jennifer A., Pockman, William T., Quirk, Joe, Reinhardt, Keith, Ripullone, Francesco, Ryan, Michael G., Sala, Anna, Sevanto, Sanna, Sperry, John S., Vargas, Rodrigo, Vennetier, Michel, Way, Danielle A., Xu, Chonggang, Yepez, Enrico A., and McDowell, Nate G. Mon . "A multi-species synthesis of physiological mechanisms in drought-induced tree mortality". United States. doi:10.1038/s41559-017-0248-x.
@article{osti_1431408,
title = {A multi-species synthesis of physiological mechanisms in drought-induced tree mortality},
author = {Adams, Henry D. and Zeppel, Melanie J. B. and Anderegg, William R. L. and Hartmann, Henrik and Landhäusser, Simon M. and Tissue, David T. and Huxman, Travis E. and Hudson, Patrick J. and Franz, Trenton E. and Allen, Craig D. and Anderegg, Leander D. L. and Barron-Gafford, Greg A. and Beerling, David J. and Breshears, David D. and Brodribb, Timothy J. and Bugmann, Harald and Cobb, Richard C. and Collins, Adam D. and Dickman, L. Turin and Duan, Honglang and Ewers, Brent E. and Galiano, Lucía and Galvez, David A. and Garcia-Forner, Núria and Gaylord, Monica L. and Germino, Matthew J. and Gessler, Arthur and Hacke, Uwe G. and Hakamada, Rodrigo and Hector, Andy and Jenkins, Michael W. and Kane, Jeffrey M. and Kolb, Thomas E. and Law, Darin J. and Lewis, James D. and Limousin, Jean-Marc and Love, David M. and Macalady, Alison K. and Martínez-Vilalta, Jordi and Mencuccini, Maurizio and Mitchell, Patrick J. and Muss, Jordan D. and O’Brien, Michael J. and O’Grady, Anthony P. and Pangle, Robert E. and Pinkard, Elizabeth A. and Piper, Frida I. and Plaut, Jennifer A. and Pockman, William T. and Quirk, Joe and Reinhardt, Keith and Ripullone, Francesco and Ryan, Michael G. and Sala, Anna and Sevanto, Sanna and Sperry, John S. and Vargas, Rodrigo and Vennetier, Michel and Way, Danielle A. and Xu, Chonggang and Yepez, Enrico A. and McDowell, Nate G.},
abstractNote = {Widespread tree mortality associated with drought has been observed on all forested continents, and global change is expected to exacerbate vegetation vulnerability. Forest mortality has implications for future biosphere-atmosphere interactions of carbon, water, and energy balance, and is poorly represented in dynamic vegetation models. Reducing uncertainty requires improved mortality projections founded on robust physiological processes. However, the proposed mechanisms of drought-induced mortality, including hydraulic failure and carbon starvation, are unresolved. A growing number of empirical studies have investigated these mechanisms, but data have not been consistently analyzed across species and biomes using a standardized physiological framework. Here we show that xylem hydraulic failure was ubiquitous across multiple tree taxa at drought-induced mortality. All species assessed had 60% or greater loss of xylem hydraulic conductivity, consistent with proposed theoretical and modelled survival thresholds. We found diverse responses in non-structural carbohydrates at mortality, indicating that evidence supporting carbon starvation was not universal. Reduced non-structural carbohydrates were more common for gymnosperms than angiosperms, associated with xylem hydraulic vulnerability, and may have a role in hydraulic deterioration. The consistent Our finding that across species of hydraulic failure at drought-induced mortality was persistent across species indicates that substantial improvement in vegetation modelling can be achieved using thresholds in hydraulic function.},
doi = {10.1038/s41559-017-0248-x},
journal = {Nature Ecology and Evolution},
issn = {2397-334X},
number = 9,
volume = 1,
place = {United States},
year = {2017},
month = {8}
}

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