The influence of increasing atmospheric CO2 , temperature, and vapor pressure deficit on seawater-induced tree mortality

The influence of increasing atmospheric CO2 , temperature, and vapor pressure deficit on seawater-induced tree mortality

© 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 235(2022), 5 vom: 18. Sept., Seite 1767-1779
1. Verfasser: Li, Weibin (VerfasserIn)
Weitere Verfasser: McDowell, Nate G, Zhang, Hongxia, Wang, Wenzhi, Mackay, D Scott, Leff, Riley, Zhang, Peipei, Ward, Nicholas D, Norwood, Matt, Yabusaki, Steve, Myers-Pigg, Allison N, Pennington, Stephanie C, Pivovaroff, Alexandria L, Waichler, Scott, Xu, Chonggang, Bond-Lamberty, Ben, Bailey, Vanessa L
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Sitka spruce carbon starvation coastal forest hydraulic failure seawater exposure tree mortality Water mehr... 059QF0KO0R Carbon Dioxide 142M471B3J Carbon 7440-44-0
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520 |a © 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation. 
520 |a Increasing seawater exposure is killing coastal trees globally, with expectations of accelerating mortality with rising sea levels. However, the impact of concomitant changes in atmospheric CO2 concentration, temperature, and vapor pressure deficit (VPD) on seawater-induced tree mortality is uncertain. We examined the mechanisms of seawater-induced mortality under varying climate scenarios using a photosynthetic gain and hydraulic cost optimization model validated against observations in a mature stand of Sitka spruce (Picea sitchensis) trees in the Pacific Northwest, USA, that were dying from recent seawater exposure. The simulations matched well with observations of photosynthesis, transpiration, nonstructural carbohydrates concentrations, leaf water potential, the percentage loss of xylem conductivity, and stand-level mortality rates. The simulations suggest that seawater-induced mortality could decrease by c. 16.7% with increasing atmospheric CO2 levels due to reduced risk of carbon starvation. Conversely, rising VPD could increase mortality by c. 5.6% because of increasing risk of hydraulic failure. Across all scenarios, seawater-induced mortality was driven by hydraulic failure in the first 2 yr after seawater exposure began, with carbon starvation becoming more important in subsequent years. Changing CO2 and climate appear unlikely to have a significant impact on coastal tree mortality under rising sea levels 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Research Support, U.S. Gov't, Non-P.H.S. 
650 4 |a Sitka spruce 
650 4 |a carbon starvation 
650 4 |a coastal forest 
650 4 |a hydraulic failure 
650 4 |a seawater exposure 
650 4 |a tree mortality 
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650 7 |a 059QF0KO0R  |2 NLM 
650 7 |a Carbon Dioxide  |2 NLM 
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650 7 |a Carbon  |2 NLM 
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700 1 |a McDowell, Nate G  |e verfasserin  |4 aut 
700 1 |a Zhang, Hongxia  |e verfasserin  |4 aut 
700 1 |a Wang, Wenzhi  |e verfasserin  |4 aut 
700 1 |a Mackay, D Scott  |e verfasserin  |4 aut 
700 1 |a Leff, Riley  |e verfasserin  |4 aut 
700 1 |a Zhang, Peipei  |e verfasserin  |4 aut 
700 1 |a Ward, Nicholas D  |e verfasserin  |4 aut 
700 1 |a Norwood, Matt  |e verfasserin  |4 aut 
700 1 |a Yabusaki, Steve  |e verfasserin  |4 aut 
700 1 |a Myers-Pigg, Allison N  |e verfasserin  |4 aut 
700 1 |a Pennington, Stephanie C  |e verfasserin  |4 aut 
700 1 |a Pivovaroff, Alexandria L  |e verfasserin  |4 aut 
700 1 |a Waichler, Scott  |e verfasserin  |4 aut 
700 1 |a Xu, Chonggang  |e verfasserin  |4 aut 
700 1 |a Bond-Lamberty, Ben  |e verfasserin  |4 aut 
700 1 |a Bailey, Vanessa L  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t The New phytologist  |d 1979  |g 235(2022), 5 vom: 18. Sept., Seite 1767-1779  |w (DE-627)NLM09818248X  |x 1469-8137  |7 nnns 
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