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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1111/nph.18909
|2 doi
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|a pubmed25n1182.xml
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Belovitch, Michael W
|e verfasserin
|4 aut
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| 245 |
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|a African savanna grasses outperform trees across the full spectrum of soil moisture availability
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|c 2023
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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 02.06.2023
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|a Date Revised 04.06.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.
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|a Models of tree-grass coexistence in savannas make different assumptions about the relative performance of trees and grasses under wet vs dry conditions. We quantified transpiration and drought tolerance traits in 26 tree and 19 grass species from the African savanna biome across a gradient of soil water potentials to test for a trade-off between water use under wet conditions and drought tolerance. We measured whole-plant hourly transpiration in a growth chamber and quantified drought tolerance using leaf osmotic potential (Ψosm ). We also quantified whole-plant water-use efficiency (WUE) and relative growth rate (RGR) under well-watered conditions. Grasses transpired twice as much as trees on a leaf-mass basis across all soil water potentials. Grasses also had a lower Ψosm than trees, indicating higher drought tolerance in the former. Higher grass transpiration and WUE combined to largely explain the threefold RGR advantage in grasses. Our results suggest that grasses outperform trees under a wide range of conditions, and that there is no evidence for a trade-off in water-use patterns in wet vs dry soils. This work will help inform mechanistic models of water use in savanna ecosystems, providing much-needed whole-plant parameter estimates for African species
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a C4 grasses
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|a drought tolerance
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|a ecohydrological trade-offs
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|a moisture limitation
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|a water-use efficiency
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| 650 |
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|a whole-plant functional traits
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|a Soil
|2 NLM
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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 NeSmith, Julienne E
|e verfasserin
|4 aut
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| 700 |
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|a Nippert, Jesse B
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Holdo, Ricardo M
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 239(2023), 1 vom: 21. Juli, Seite 66-74
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnas
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| 773 |
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|g volume:239
|g year:2023
|g number:1
|g day:21
|g month:07
|g pages:66-74
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|u http://dx.doi.org/10.1111/nph.18909
|3 Volltext
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