Geographic range size, seedling ecophysiology and phenotypic plasticity in Australian Acacia species

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Show simple item record Pohlman, CL Nicotra, AB Murray, BR 2009-12-21T02:30:14Z 2005-02
dc.identifier.citation Journal of Biogeography, 2005, 32 (2), pp. 341 - 351
dc.identifier.issn 0305-0270
dc.identifier.other C1 en_US
dc.description.abstract Aim: The degree to which eco-physiological traits critical to seedling establishment are related to differences in geographic range size among species is not well understood. Here, we first tested the idea that seedling ecophysiological attributes associated with establishment differ between narrowly distributed and geographically widespread plant species. Secondly, we tested the notion that species occupying wide geographic ranges have greater phenotypic plasticity in response to the environment than contrasted species with more restricted distributions. Location: Eastern Australia. Methods: We compared five pairs of geographically restricted and widespread Acacia species grown under glasshouse conditions for differences in seedling relative growth rate and associated allocational, morphological and physiological traits. We then examined whether widespread species displayed greater phenotypic plasticity in these traits than narrowly distributed species in response to changes in soil water availability. Results: Neither relative growth rate nor any measure of biomass accumulation or allocation differed significantly between seedlings of narrowly distributed and widespread species. In addition, the plasticity of biomass allocation was not greater in widespread species. However, the leaflets of widespread species had higher photosynthetic capacity and greater plasticity of water use efficiency than the leaflets of narrowly distributed species. Main conclusions: We demonstrated fundamental differences in the physiology and plasticity of leaflets of widespread and narrowly distributed species. The greater plasticity of these seedling leaflet traits may allow widespread Acacia species to utilize a wider range of environmental conditions in relation to soil moisture than restricted Acacia species. However, we did not find corresponding differences in mean or plasticity of seedling growth and allocational traits. In general, we suggest that relationships between rarity and species traits are both context and taxon specific.
dc.language eng
dc.relation.isbasedon 10.1111/j.1365-2699.2004.01181.x
dc.title Geographic range size, seedling ecophysiology and phenotypic plasticity in Australian Acacia species
dc.type Journal Article
dc.description.version Published
dc.parent Journal of Biogeography
dc.journal.volume 2
dc.journal.volume 32
dc.journal.number en_US
dc.journal.number 2 en_US
dc.publocation Oxford, UK en_US
dc.identifier.startpage 341 en_US
dc.identifier.endpage 351 en_US DVCRch.Institute for Water & Environmental Resource Mgmnt en_US
dc.conference Verified OK en_US
dc.for 060208 Terrestrial Ecology
dc.personcode 010046
dc.personcode 106510
dc.percentage 100 en_US Terrestrial Ecology en_US
dc.classification.type FOR-08 en_US
dc.description.keywords Acacia
dc.description.keywords Australia
dc.description.keywords Phenotypic plasticity
dc.description.keywords Range size
dc.description.keywords Relative growth rate
dc.description.keywords Seedling
dc.description.keywords Specific leaf area
dc.description.keywords Water availability
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true
utslib.collection.history Closed (ID: 3)

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