Decade-long response of arid-land mallee vegetation to fire, flooding and grazing in south-eastern Australia
2015 (English)In: Journal of Arid Environments, ISSN 0140-1963, E-ISSN 1095-922X, Vol. 121, 7-14 p.Article in journal (Refereed) Published
Australian arid vegetation has evolved within highly variable environments characterised by low rainfall and sporadic fire events. Episodic high rainfall events are a significant factor in plant species recruitment, but their unpredictability makes them difficult to study. We report on the response of vascular plants to a major rainfall event and flood in an arid region of south-eastern Australia. Fire that occurred two months before the flood was incorporated into the study. Paired fenced and unfenced plots were established at control locations and also in areas that had been either flooded, burnt, or flooded and burnt. Objectives were to quantify the long-term effects of fire, flood and vertebrate herbivory, and their interactions, on vegetation composition, plant life forms and species diversity. We found that relative to controls (i) there was a significant effect of flooding on vegetation composition, (ii) changes in life form abundance were driven by flooding and grazing, (iii) there was a strong positive relationship between grazer exclusion and species diversity that was maintained over time and (iv) there was little effect of fire. Understanding the long-term effects of both natural disturbances and vertebrate herbivory will benefit plant conservation in the arid zone.
Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 121, 7-14 p.
IdentifiersURN: urn:nbn:se:liu:diva-118778DOI: 10.1016/j.jaridenv.2015.05.006ISI: 000358628500002OAI: oai:DiVA.org:liu-118778DiVA: diva2:816778
We would like to thank Peter Sedgewick, Jenny Sedgewick, Dr. Fiona Christie (University of Melbourne) and Tim Simpson (Federation University Australia) for their help in the field. We would like to thank three anonymous reviewers for their constructive feedback on earlier version of this manuscript. We also thank Sara Munawar for preparation of study site map. The Federation University Australia provided financial support for the 2002-2004 field work.2015-06-042015-06-042015-08-24