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Type: Journal article
Title: A comparison of stomatal traits between contemporary and fossil leaves of Melaleuca quinquenervia: Do they reflect climate variation?
Author: Hill, K.
Barr, C.
Tibby, J.
Hill, R.
Watling, J.
Citation: Review of Palaeobotany and Palynology, 2019; 271:104109-1-104109-8
Publisher: Elsevier
Issue Date: 2019
ISSN: 0034-6667
Statement of
Kathryn E. Hill, Cameron Barr, John Tibby, Robert S. Hill, Jennifer R.Watling
Abstract: Stomatal traits have been shown to vary in predictableways in response to environmental change inmany plant species. As a consequence, stomatal traits in fossil leaves are sometimes used as proxies for past CO2 and climate. Herewe investigate the influence of temperature, rainfall and CO2 on stomatal traits in plant cuticle fine details of Melaleuca quinquenervia.We use both modern and fossil leaves deposited over the last c. 7500 years to evaluate the effect of CO2, and modern leaves for climate variables. We found a significant negative relationship between stomatal size and density across both modern and fossil leaves of M. quinquenervia. However, wewere unable to find any relationship between stomatal traits and CO2 across a range from 260 to 380 ppm. We were unable to find any robust relationships between stomatal traits and either evaporation or temperature using the modern dataset. Apogeotropic roots account for the lack of stomatal anatomy response to evaporation in sites that experiences inundation.Weconclude that stomatal size is a highly plastic trait in this species and changes do not necessarily reflect functional changes in the leaves.
Keywords: Stomatal density; stomatal size; climate proxy; Holocene; Melaleuca quinquenervia
Rights: Crown Copyright © 2019 Published by Elsevier B.V. All rights reserved.
RMID: 1000000560
DOI: 10.1016/j.revpalbo.2019.104109
Grant ID:
Appears in Collections:Ecology, Evolution and Landscape Science publications

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