Germinable soil seedbanks in native pastures near crows nest, south-east Queensland

McIvor, J. G., Saeli, I., Hodgkinson, J. J. and Shelton, H. M. (2004) Germinable soil seedbanks in native pastures near crows nest, south-east Queensland. Rangeland Journal, 26 1: 72-87. doi:10.1071/RJ04005


Author McIvor, J. G.
Saeli, I.
Hodgkinson, J. J.
Shelton, H. M.
Title Germinable soil seedbanks in native pastures near crows nest, south-east Queensland
Journal name Rangeland Journal   Check publisher's open access policy
ISSN 1036-9872
1834-7541
Publication date 2004-01-01
Sub-type Article (original research)
DOI 10.1071/RJ04005
Open Access Status DOI
Volume 26
Issue 1
Start page 72
End page 87
Total pages 16
Place of publication Cottesloe, W.A
Publisher CSIRO Publishing
Language eng
Subject CX
070199 Agriculture, Land and Farm Management not elsewhere classified
Abstract The soil seedbanks in three patch types (tall grassland, short sward and lawn) were measured in native pastures near Crows Nest, south-east Queensland in two experiments. In the first experiment, seedbanks were measured at four sites, and in the second, the variation in seedbanks during the year was measured at one site. In each experiment the size and composition of the seedbanks were determined by germinating the seeds in soil samples. In the first experiment, total seed numbers ranged from approximately 6000 to 12,000 per m(2). There were no significant differences between sites for total seeds or for seeds of any species group except legumes which comprised only a small portion of the seedbanks. There were significant differences between patch types for total seeds and for the following species groups, medium tussock grasses, short tussock grasses, stoloniferous grasses, legumes and forbs but not large tussock grasses and sedges. Total seed numbers, and those of medium tussock grasses, stoloniferous grasses and forbs were highest in the lawn patches and lowest in the short sward patches. Legumes had higher numbers in the tall grassland patches than in other patch types. In the second experiment, there were large differences between total seed numbers at the different sample dates (January, May, September and November). Numbers were highest in January and then declined throughout the year. This pattern was largely a reflection of the changes in numbers of forb seeds, the species group with the most seeds. There were no significant differences between patch types for total seeds but there were for medium tussock grasses, stoloniferous grasses, sedges and forbs. There was no relationship between the composition of the pasture sward and the composition of the seedbank for any of the three patch types. Twenty-eight species were allocated to persistent and transient seedbank types; all seedbank types occurred in all three patch types. The major species in the seedbanks were sedges (Cyperus gracilis, C sesquiflorus), forbs (Gamochaeta spp., Paronychia brasiliana, Daucus glochidiatus) and Eragrostis spp.
Keyword Ecology
seedbank type
sub-tropical
patch
grass
sedge
forbs
Eucalypt Forest Reserve
Seed Banks
Northern-territory
Seasonal-variation
Grasslands
Australia
Tropics
Vegetation
Patterns
Dormancy
Q-Index Code CX

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Agriculture and Food Sciences
 
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Created: Sat, 26 Jan 2008, 02:16:26 EST