An investigation into the possible inhibitory effects of white cypress pine (Callitris glaucophylla) litter on the germination and growth of associated ground cover species

Harris, MR, Lamb, D and Erskine, PD (2003) An investigation into the possible inhibitory effects of white cypress pine (Callitris glaucophylla) litter on the germination and growth of associated ground cover species. Australian Journal of Botany, 51 1: 93-102. doi:10.1071/BT02045


Author Harris, MR
Lamb, D
Erskine, PD
Title An investigation into the possible inhibitory effects of white cypress pine (Callitris glaucophylla) litter on the germination and growth of associated ground cover species
Journal name Australian Journal of Botany   Check publisher's open access policy
ISSN 0067-1924
Publication date 2003-01-01
Sub-type Article (original research)
DOI 10.1071/BT02045
Volume 51
Issue 1
Start page 93
End page 102
Total pages 10
Place of publication Collingwood, Victoria
Publisher CSIRO Publishing
Language eng
Subject C1
270703 Terrestrial Ecology
770705 Integrated (ecosystem) assessment and management
Abstract White cypress-pine stands typically support sparse densities of shrubs and grasses. The commonly held opinion is that leaching of allelopathic chemical compounds from cypress-pine litter partly facilitates this exclusion. Germination and growth of cypress pine seedlings do not appear to be similarly affected. This study set out to determine whether cypress litter had a differential effect on germination and growth of cypress-pine seedlings and on associated ground-cover species. Glasshouse trials comparing seedling emergence under cypress- and artificial-litter layers were undertaken. Cypress-pine litter did not have an inhibitory effect on the germination or growth of ground-cover species. In most cases, seedling emergence was facilitated by the application of cypress-pine litter due to its ability to increase the water holding capacity of the underlying soil. Cypress litter did not promote growth of its own seedlings over its competitors except on coarse-textured soils where it provided an ameliorative function to water stress due to the soil's reduced water holding capacity. The inhibition of ground-cover species' germination and growth in pure cypress stands was suggested to be the result of high below-ground resource competition due to the pine's expansive root morphology.
Keyword Plant Sciences
Leaf-litter
Eucalyptus
Dynamics
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 05:12:27 EST