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Aridity drives coordinated trait shifts but not decreased trait variance across the geographic range of eight Australian trees

Citation

Anderegg, LDL and Loy, X and Markham, IP and Elmer, CM and Hovenden, MJ and HilleRisLambers, J and Mayfield, MM, Aridity drives coordinated trait shifts but not decreased trait variance across the geographic range of eight Australian trees, New Phytologist, 229, (3) pp. 1375-1387. ISSN 0028-646X (2021) [Refereed Article]

Copyright Statement

Copyright 2020 The Authors New Phytologist Copyright 2020 New Phytologist Foundation

DOI: doi:10.1111/nph.16795

Abstract

  • Large intraspecific functional trait variation strongly impacts many aspects of communities and ecosystems, and is the medium upon which evolution works. Yet intraspecific trait variation is inconsistent and hard to predict across traits, species and locations.
  • We measured within-species variation in leaf mass per area (LMA), leaf dry matter content (LDMC), branch wood density (WD), and allocation to stem area vs leaf area in branches (branch Huber value (HV)) across the aridity range of seven Australian eucalypts and a co-occurring Acacia species to explore how traits and their variances change with aridity.
  • Within species, we found consistent increases in LMA, LDMC and WD and HV with increasing aridity, resulting in consistent trait coordination across leaves and branches. However, this coordination only emerged across sites with large climate differences. Unlike trait means, patterns of trait variance with aridity were mixed across populations and species. Only LDMC showed constrained trait variation in more xeric species and drier populations that could indicate limits to plasticity or heritable trait variation.
  • Our results highlight that climate can drive consistent within-species trait patterns, but that patterns might often be obscured by the complex nature of morphological traits, sampling incomplete species ranges or sampling confounded stress gradients.

Item Details

Item Type:Refereed Article
Keywords:Eucalyptus, functional traits, intraspecific trait variation, water availability gradient, trait variance, plant, trait, aridity, leaf economics, natural selection
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Terrestrial ecology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Hovenden, MJ (Professor Mark Hovenden)
ID Code:145244
Year Published:2021 (online first 2020)
Web of Science® Times Cited:3
Deposited By:Plant Science
Deposited On:2021-07-13
Last Modified:2021-09-16
Downloads:0

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