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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1111/nph.17298
|2 doi
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|a pubmed24n1072.xml
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|a (NLM)33629360
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Nolan, Rachael H
|e verfasserin
|4 aut
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| 245 |
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|a Hydraulic failure and tree size linked with canopy die-back in eucalypt forest during extreme drought
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 14.05.2021
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|a Date Revised 23.08.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2021 The Authors New Phytologist © 2021 New Phytologist Foundation.
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|a Eastern Australia was subject to its hottest and driest year on record in 2019. This extreme drought resulted in massive canopy die-back in eucalypt forests. The role of hydraulic failure and tree size on canopy die-back in three eucalypt tree species during this drought was examined. We measured pre-dawn and midday leaf water potential (Ψleaf ), per cent loss of stem hydraulic conductivity and quantified hydraulic vulnerability to drought-induced xylem embolism. Tree size and tree health was also surveyed. Trees with most, or all, of their foliage dead exhibited high rates of native embolism (78-100%). This is in contrast to trees with partial canopy die-back (30-70% canopy die-back: 72-78% native embolism), or relatively healthy trees (little evidence of canopy die-back: 25-31% native embolism). Midday Ψleaf was significantly more negative in trees exhibiting partial canopy die-back (-2.7 to -6.3 MPa), compared with relatively healthy trees (-2.1 to -4.5 MPa). In two of the species the majority of individuals showing complete canopy die-back were in the small size classes. Our results indicate that hydraulic failure is strongly associated with canopy die-back during drought in eucalypt forests. Our study provides valuable field data to help constrain models predicting mortality risk
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Eucalyptus
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|a cavitation
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|a drought
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|a hydraulic failure
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|a mortality
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|a tree size
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|a water potential
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|a xylem embolism
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|a Water
|2 NLM
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|a 059QF0KO0R
|2 NLM
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| 700 |
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|a Gauthey, Alice
|e verfasserin
|4 aut
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|a Losso, Adriano
|e verfasserin
|4 aut
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|a Medlyn, Belinda E
|e verfasserin
|4 aut
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|a Smith, Rhiannon
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|a Chhajed, Shubham S
|e verfasserin
|4 aut
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|a Fuller, Kathryn
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|a Song, Magnolia
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|a Li, Xine
|e verfasserin
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|a Beaumont, Linda J
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|a Boer, Matthias M
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|a Wright, Ian J
|e verfasserin
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|a Choat, Brendan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 230(2021), 4 vom: 25. Mai, Seite 1354-1365
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:230
|g year:2021
|g number:4
|g day:25
|g month:05
|g pages:1354-1365
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|u http://dx.doi.org/10.1111/nph.17298
|3 Volltext
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