eCite Digital Repository

Patch mosaic cyclic succession associated with the growth and senescence of an alpine shrub

Citation

McPhail, DC and Kirkpatrick, JB, Patch mosaic cyclic succession associated with the growth and senescence of an alpine shrub, Australian Journal of Botany, 64, (2) pp. 111-119. ISSN 1444-9862 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 CSIRO

DOI: doi:10.1071/BT15182

Abstract

Endogenously-induced cyclic vegetation change has been associated with the life cycle of shrub species, resulting in mosaic or linear patterning in vegetation. We investigated whether mosaic cyclic succession was taking place in Richea acerosa (Lindley) F.Muell. alpine heath on the Central Plateau of Tasmania, Australia by determining the variation in species composition associated with different growth characteristics of the shrub and by monitoring shrubs in plots over 11 years. Temperatures below and adjacent to shrubs were measured in clear sky conditions to determine if microclimatic variation was associated with structural and floristic variation. Species richness was higher outside than inside the shrubs, and was further depressed by an increasing proportion of dead material in the shrub. However, Poa saxicola R.Br. appeared to be protected by the prickly foliage of R. acerosa and also preferentially occurred among the mass of dead stems that characterised the centre of older plants. There was a strong floristic shift associated with the development of the shrub. The live cover of individual shrubs remained constant in all plots over the 11 years, while plots initially dominated by senescent plants contained young plants and vice-versa. The live part of the shrubs moderated temperatures. However, root competition and protection from grazing seem likely to have made a major contribution to the shifting conditions associated with the mosaic cyclic succession.

Item Details

Item Type:Refereed Article
Keywords:cyclic succession, alpine, Tasmania
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Terrestrial Ecology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Flora, Fauna and Biodiversity of environments not elsewhere classified
Author:Kirkpatrick, JB (Professor James Kirkpatrick)
ID Code:110034
Year Published:2016
Deposited By:Geography and Spatial Science
Deposited On:2016-07-12
Last Modified:2016-08-05
Downloads:0

Repository Staff Only: item control page