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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.13911
|2 doi
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|a pubmed24n0920.xml
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|a (DE-627)NLM27619246X
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|a (NLM)28949085
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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 |
1 |
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|a Rumman, Rizwana
|e verfasserin
|4 aut
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| 245 |
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|a Variation in bulk-leaf 13 C discrimination, leaf traits and water-use efficiency-trait relationships along a continental-scale climate gradient in Australia
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 05.11.2018
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|a Date Revised 05.11.2018
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2017 John Wiley & Sons Ltd.
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|a Large spatial and temporal gradients in rainfall and temperature occur across Australia. This heterogeneity drives ecological differentiation in vegetation structure and ecophysiology. We examined multiple leaf-scale traits, including foliar 13 C isotope discrimination (Δ13 C), rates of photosynthesis and foliar N concentration and their relationships with multiple climate variables. Fifty-five species across 27 families were examined across eight sites spanning contrasting biomes. Key questions addressed include: (i) Does Δ13 C and intrinsic water-use efficiency (WUEi ) vary with climate at a continental scale? (ii) What are the seasonal and spatial patterns in Δ13 C/WUEi across biomes and species? (iii) To what extent does Δ13 C reflect variation in leaf structural, functional and nutrient traits across climate gradients? and (iv) Does the relative importance of assimilation and stomatal conductance in driving variation in Δ13 C differ across seasons? We found that MAP, temperature seasonality, isothermality and annual temperature range exerted independent effects on foliar Δ13 C/WUEi . Temperature-related variables exerted larger effects than rainfall-related variables. The relative importance of photosynthesis and stomatal conductance (gs ) in determining Δ13 C differed across seasons: Δ13 C was more strongly regulated by gs during the dry-season and by photosynthetic capacity during the wet-season. Δ13 C was most strongly correlated, inversely, with leaf mass area ratio among all leaf attributes considered. Leaf Nmass was significantly and positively correlated with MAP during dry- and wet-seasons and with moisture index (MI) during the wet-season but was not correlated with Δ13 C. Leaf Pmass showed significant positive relationship with MAP and Δ13 C only during the dry-season. For all leaf nutrient-related traits, the relationships obtained for Δ13 C with MAP or MI indicated that Δ13 C at the species level reliably reflects the water status at the site level. Temperature and water availability, not foliar nutrient content, are the principal factors influencing Δ13 C across Australia
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a 13C
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|a climate and WUEi
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| 650 |
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|a isotope discrimination
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| 650 |
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|a leaf traits
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| 650 |
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|a Water
|2 NLM
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| 650 |
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|a 059QF0KO0R
|2 NLM
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| 700 |
1 |
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|a Atkin, Owen K
|e verfasserin
|4 aut
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| 700 |
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|a Bloomfield, Keith J
|e verfasserin
|4 aut
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| 700 |
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|a Eamus, Derek
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Global change biology
|d 1999
|g 24(2018), 3 vom: 14. März, Seite 1186-1200
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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| 773 |
1 |
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|g volume:24
|g year:2018
|g number:3
|g day:14
|g month:03
|g pages:1186-1200
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| 856 |
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|u http://dx.doi.org/10.1111/gcb.13911
|3 Volltext
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|h 1186-1200
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