Seasonal variations in tree water use and physiology correlate with soil salinity and soil water content in remnant woodlands on saline soils

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dc.contributor.author Ng, Catriona en
dc.contributor.author Zeppel, MJB en
dc.contributor.author Palmer, AR en
dc.contributor.author Eamus, D en
dc.date.accessioned 2016-12-14T21:38:18Z en
dc.date.available 2016-02-19 en
dc.date.issued 2016-06 en
dc.identifier.citation Journal of Arid Environments, June 2016, 129, 102 - 110 en
dc.identifier.issn 0140-1963 en
dc.identifier.uri http://hdl.handle.net/2292/31381 en
dc.description.abstract Ecophysiological studies of remnant woodlands in saline environments are scarce. We investigated seasonal fluctuations in soil water and salinity together with leaf and branch traits (area-based maximum assimilation (Amax), foliar nitrogen, specific leaf area (SLA) and Huber value (Hv)) and sap velocities of Eucalyptus macrorhyncha at four semi-arid sites in south-eastern Australia. Summer and winter soil salinities (10 cm depth) were 15–35 dS m−1 and 8–10 dS m−1 respectively. Gravimetric soil water content in the upper 20 cm was 2–5% in summer and 7–23% in winter, resulting in a significant inverse correlation between soil water and soil salinity. We found significant correlations between soil conditions and plant traits and function across seasons. Soil water content was significantly correlated with foliar N, SLA, Hv and maximum sap velocity while soil salinity was significantly correlated with Amax, Hv and maximum sap velocity. Correlations indicate co-variation of soil conditions and plant physiology in response to environmental conditions such as solar radiation and vapour pressure deficit (D). E. macrorhyncha tolerates the dual stresses of high salinity and low soil water during summer. While the plants appeared unhealthy, our data show that remnant vegetation can remain functional even in close proximity to saline scalds. en
dc.language English en
dc.publisher Elsevier en
dc.relation.ispartofseries Journal of Arid Environments en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0140-1963/ https://www.elsevier.com/about/company-information/policies/sharing en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Seasonal variations in tree water use and physiology correlate with soil salinity and soil water content in remnant woodlands on saline soils en
dc.type Journal Article en
dc.identifier.doi 10.1016/j.jaridenv.2016.02.011 en
pubs.begin-page 102 en
pubs.volume 129 en
dc.description.version VoR - Version of Record en
pubs.author-url http://www.sciencedirect.com/science/article/pii/S0140196316300210 en
pubs.end-page 110 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 530712 en
pubs.org-id Science en
pubs.org-id Biological Sciences en
pubs.record-created-at-source-date 2016-12-15 en
pubs.online-publication-date 2016-03-02 en


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