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Title: Co-occurring woody species have diverse hydraulic strategies and mortality rates during an extreme drought: Belowground hydraulic failure during drought

Abstract

From 2011 to 2013, Texas experienced its worst drought in recorded history. This event provided a unique natural experiment to assess species-specific responses to extreme drought and mortality of four co-occurring woody species: Quercus fusiformis, Diospyros texana, Prosopis glandulosa and Juniperus ashei. We examined hypothesized mechanisms that could promote these species’ diverse mortality patterns using post-drought measurements on surviving trees coupled to retrospective process modeling. The species exhibited a wide range of gas exchange responses, hydraulic strategies, and mortality rates. Multiple proposed indices of mortality mechanisms were not consistent with the observed mortality patterns across species, including measures of iso/anisohydry, photosynthesis, carbohydrate depletion, and hydraulic safety margins. Large losses of growing season whole-tree conductance (driven by belowground losses of conductance), and shallower rooting depths, were associated with species that exhibited greater mortality. Based on this retrospective analysis, we suggest that species more vulnerable to drought were more likely to have succumbed to hydraulic failure belowground.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [4];  [9];  [10];  [11]
  1. College of Natural Resources, University of Idaho, Moscow ID 83844 USA
  2. Bordeaux Sciences Agro, UMR INRA-ISPA 1391, Gradignan 33195 France; Nicholas School of the Environment, Duke University, Durham NC 27708 USA
  3. College of Natural Resources, University of Idaho, Moscow ID 83844 USA; Department of Natural Resources and the Environment, University of New Hampshire, Durham NH 03824 USA
  4. Nicholas School of the Environment, Duke University, Durham NC 27708 USA
  5. Department of Botany, University of Wisconsin-Madison, Madison WI 53705 USA
  6. US Forest Service, Pacific Northwest Research Station, Corvallis OR 97331 USA
  7. Grassland, Soil & Water Research Laboratory USDA-Agricultural Research Service, Temple TX 76502 USA
  8. INRA Nancy, UMR INRA-UL 1137 Ecologie et Ecophysiologie Forestières, Champenoux 54280 France
  9. Department of Geography, State University of New York, Buffalo NY 14261 USA
  10. Pacific Northwest National Laboratory, Richland WA 99352 USA
  11. Department of Earth System Science, Woods Institute for the Environment, and Precourt Institute for Energy, Stanford University, Stanford CA 94305 USA
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1427907
Report Number(s):
PNNL-SA-131417
Journal ID: ISSN 0140-7791; 830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Plant, Cell and Environment
Additional Journal Information:
Journal Volume: 41; Journal Issue: 3; Journal ID: ISSN 0140-7791
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
carbon gain; cavitation; climate change; stomatal conductance; water relations

Citation Formats

Johnson, Daniel M., Domec, Jean-Christophe, Carter Berry, Z., Schwantes, Amanda M., McCulloh, Katherine A., Woodruff, David R., Wayne Polley, H., Wortemann, Remí, Swenson, Jennifer J., Scott Mackay, D., McDowell, Nate G., and Jackson, Robert B. Co-occurring woody species have diverse hydraulic strategies and mortality rates during an extreme drought: Belowground hydraulic failure during drought. United States: N. p., 2018. Web. doi:10.1111/pce.13121.
Johnson, Daniel M., Domec, Jean-Christophe, Carter Berry, Z., Schwantes, Amanda M., McCulloh, Katherine A., Woodruff, David R., Wayne Polley, H., Wortemann, Remí, Swenson, Jennifer J., Scott Mackay, D., McDowell, Nate G., & Jackson, Robert B. Co-occurring woody species have diverse hydraulic strategies and mortality rates during an extreme drought: Belowground hydraulic failure during drought. United States. doi:10.1111/pce.13121.
Johnson, Daniel M., Domec, Jean-Christophe, Carter Berry, Z., Schwantes, Amanda M., McCulloh, Katherine A., Woodruff, David R., Wayne Polley, H., Wortemann, Remí, Swenson, Jennifer J., Scott Mackay, D., McDowell, Nate G., and Jackson, Robert B. Mon . "Co-occurring woody species have diverse hydraulic strategies and mortality rates during an extreme drought: Belowground hydraulic failure during drought". United States. doi:10.1111/pce.13121.
@article{osti_1427907,
title = {Co-occurring woody species have diverse hydraulic strategies and mortality rates during an extreme drought: Belowground hydraulic failure during drought},
author = {Johnson, Daniel M. and Domec, Jean-Christophe and Carter Berry, Z. and Schwantes, Amanda M. and McCulloh, Katherine A. and Woodruff, David R. and Wayne Polley, H. and Wortemann, Remí and Swenson, Jennifer J. and Scott Mackay, D. and McDowell, Nate G. and Jackson, Robert B.},
abstractNote = {From 2011 to 2013, Texas experienced its worst drought in recorded history. This event provided a unique natural experiment to assess species-specific responses to extreme drought and mortality of four co-occurring woody species: Quercus fusiformis, Diospyros texana, Prosopis glandulosa and Juniperus ashei. We examined hypothesized mechanisms that could promote these species’ diverse mortality patterns using post-drought measurements on surviving trees coupled to retrospective process modeling. The species exhibited a wide range of gas exchange responses, hydraulic strategies, and mortality rates. Multiple proposed indices of mortality mechanisms were not consistent with the observed mortality patterns across species, including measures of iso/anisohydry, photosynthesis, carbohydrate depletion, and hydraulic safety margins. Large losses of growing season whole-tree conductance (driven by belowground losses of conductance), and shallower rooting depths, were associated with species that exhibited greater mortality. Based on this retrospective analysis, we suggest that species more vulnerable to drought were more likely to have succumbed to hydraulic failure belowground.},
doi = {10.1111/pce.13121},
journal = {Plant, Cell and Environment},
issn = {0140-7791},
number = 3,
volume = 41,
place = {United States},
year = {2018},
month = {1}
}

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