Please use this identifier to cite or link to this item: https://une.intersearch.com.au/unejspui/handle/1959.11/2779
Title: Seed-bank dynamics of 'Eleocharis': can spatial and temporal variability explain habitat segregation?
Contributor(s): Bell, Dorothy (author); Clarke, Peter John (author)
Publication Date: 2004
DOI: 10.1071/BT03024
Handle Link: https://hdl.handle.net/1959.11/2779
Abstract: Four 'Eleocharis' species exhibit habitat partitioning in both extant vegetation and in the soil seed bank of upland temporary wetlands on the Northern Tablelands of New South Wales. Explanations for this partitioning were sought in seed-bank dynamics at three shore levels in two wetlands. Habitat partitioning (zonation) was explained in part by seedling recruitment but not by either persistence of seeds in the soil or by dormancy patterns. All four species recruited at wetland edges but only the deepwater species, 'Eleocharis sphacelata', recruited in deeper water. Viability of buried seeds was consistently high and species had very low decay rates and half-lives greater than 50 years. Two types of dormancy patterns with burial were shown. Most seeds of 'Eleocharis sphacelata' and 'E. pusilla' were non-dormant after a 3-month burial, whereas for 'E. acuta' and 'E. dietrichiana' seed germination percentages gradually increased over a number of years. These two dormancy patterns may contribute to coexistence, since coexistence is enhanced by a long-lived resistant phase in the life history of species and by temporal variability in germination. There were also spatial inconsistencies in patterns of dormant fractions. Burial in the deeper zones of the marsh-like Billybung Lagoon had an inhibitory effect both on germinability and on germination rates of 'E. acuta' and 'E. dietrichiana' seeds. All but 'E. acuta' showed some degree of seasonal dormancy, but this pattern was also not consistent in space. Explanations for zonation should concentrate on other life-history phases, such as dispersal and seedling survival.
Publication Type: Journal Article
Source of Publication: Australian Journal of Botany, 52(1), p. 119-131
Publisher: CSIRO Publishing
Place of Publication: Melbourne, Australia
ISSN: 0067-1924
Field of Research (FOR): 060799 Plant Biology not elsewhere classified
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Other Links: http://nla.gov.au/anbd.bib-an891680
Statistics to Oct 2018: Visitors: 126
Views: 125
Downloads: 0
Appears in Collections:Journal Article

Files in This Item:
2 files
File Description SizeFormat 
Show full item record

SCOPUSTM   
Citations

8
checked on Nov 26, 2018

Page view(s)

50
checked on Mar 4, 2019
Google Media

Google ScholarTM

Check

Altmetric

SCOPUSTM   
Citations

 

Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.