The ages and fecundity of some arid-zone plants in Western Australia
S. J. J. F. Davies A C and S. A. Kenny B
+ Author Affiliations
- Author Affiliations
A Department of Environment and Agriculture, Curtin University, GPO Box 1987U, Perth, WA 6845, Australia.
B 48 Challenger Road, Madora Bay, WA 6210, Australia.
C Corresponding author. Email: S.Davies@exchange.curtin.edu.au
The Rangeland Journal 35(4) 455-468 https://doi.org/10.1071/RJ12112
Submitted: 21 December 2012 Accepted: 16 August 2013 Published: 21 October 2013
Abstract
Since 1960, 22 species of individually marked, arid-zone perennial plants in the Murchison District and Gibson Desert of Western Australia have been monitored for flowering, fecundity, and survival. The age to which individual species survive was determined in terms of half-life, i.e. the time elapsed for half of the marked sample to die. The estimates ranged from 6.5 to 535 years. Phenology was recorded by observing whether the plants carried buds, flowers, fruits, or any combination of these, or were sterile. Fecundity of each species was measured by recording each year the percentage of the sample trees that carried fruit, by collecting seeds in trays placed beneath the plants and by counting the pods produced by some species. Fecundity was related to seasonal rainfall, most species responding positively to summer rainfall. The concept of mast years, as utilised in the northern hemisphere, was applied to recorded fecundities and some evidence was found that, after a year of high fecundity, the plants responded less vigorously to conditions of high rainfall than they did in the previous year of high rainfall. This suggests that, in years when fecundity is high, it diminishes the resources available within the plants to respond to heavy rainfall the following year or reduces the soil nutrients available to them.
Additional keywords: climate, deserts, rainfall, rehabilitation, shrubs, trees.
References
Andersen, G. L., and Krzywinski, K. (2007). Longevity and growth of Acacia tortilis insights from 14C content and anatomy of wood. BMC Ecology 7, 4–13.| Longevity and growth of Acacia tortilis insights from 14C content and anatomy of wood.Crossref | GoogleScholarGoogle Scholar | 17573964PubMed |
Crisp, M. D. (1978). Demography and survival under grazing of three Australian semi-desert shrubs. Oikos 30, 520–528.
| Demography and survival under grazing of three Australian semi-desert shrubs.Crossref | GoogleScholarGoogle Scholar |
Crisp, M. D., and Lange, R. T. (1976). Age structure, distribution and survival under grazing of the arid-zone shrub Acacia burkettii. Oikos 27, 86–92.
| Age structure, distribution and survival under grazing of the arid-zone shrub Acacia burkettii.Crossref | GoogleScholarGoogle Scholar |
Curry, P. J., Payne, A. L., Leighton, K. A., Hennig, P., and Blood, D. A. (1994). ‘An Inventory and Condition Survey of the Murchison River Catchment and Surrounds, Western Australia.’ Technical Bulletin No. 84. (Department of Agriculture, Western Australia: South Perth, WA.)
Davies, S. J. J. F. (1968). Aspects of a study of emus in semi-arid Western Australia. Proceedings of the Ecological Society of Australia 3, 160–166.
Davies, S. J. J. F. (1970). A list of plants and animals found at Mileura, Western Australia. Lat. 26° 22’ S, Long. 117° 20’ E. Technical Memorandum No. 3. Division of Wildlife Research, CSIRO, Canberra, ACT.
Davies, S. J. J. F. (1973). Environmental variables and the biology of native Australian animals in the mulga lands. Tropical Grasslands 7, 127–134.
Davies, S. J. J. F. (1975). Land use by emus and other wildlife species in the arid shrublands of Western Australia. In: ‘Proceedings of the 3rd Workshop US/Australia Rangelands Panel’. Tucson, Arizona, 1973. (Ed. D. N. Hyder.) pp. 91–98. (Society for Range Management: Denver, CO.)
Davies, S. J. J. F. (1976). Studies of the flowering season and fruit production of some arid zone shrubs and trees in Western Australia. Journal of Ecology 64, 665–687.
| Studies of the flowering season and fruit production of some arid zone shrubs and trees in Western Australia.Crossref | GoogleScholarGoogle Scholar |
Davies, S. J. J. F. (1986). A biology of the desert fringe. Journal of the Royal Society of Western Australia 68, 37–50.
Davies, S. J. J. F., and Creese, S. (2009). ‘Studies of two species of bat (Chiroptera) in the Murchison District of Western Australia: 1960–2007.’ Bulletin No. 29. (Department of Environmental Biology, Curtin University of Technology: Fremantle, WA.)
Davies, S. J. J. F., and Walsh, T. F. M. (1979). Observations on the regeneration of shrubs and woody forbs over a ten year period in grazed quadrats on Mileura Station, Western Australia. The Australian Rangeland Journal 1, 215–224.
| Observations on the regeneration of shrubs and woody forbs over a ten year period in grazed quadrats on Mileura Station, Western Australia.Crossref | GoogleScholarGoogle Scholar |
Deevey, E. S. (1947). Life tables for natural populations of animals. The Quarterly Review of Biology 22, 283–314.
| Life tables for natural populations of animals.Crossref | GoogleScholarGoogle Scholar | 18921802PubMed |
Forti, M., Lavie, Y., Ben-Dov, Y., and Pauker, R. (2006). Long-term plant survival and development under dryland conditions in an experimental site in the semi-arid Negev of Israel. Journal of Arid Environments 65, 1–28.
| Long-term plant survival and development under dryland conditions in an experimental site in the semi-arid Negev of Israel.Crossref | GoogleScholarGoogle Scholar |
Fox, J. E. D. (1998). Role of fire in forest and grazing lands. In: ‘Modern trends in Ecology and Environment’. (Ed. R. S. Ambashi.) pp. 253–276. (Backhuys Publishers: Leiden, The Netherlands.)
Fox, J. E. D., and de Rebeira, P. (1977). Seedling studies at Mileura. In: ‘Mulga Research Centre Annual Report, No. 1’. (Ed. J. Fox.) pp. 13–16. (Department of Environmental Biology, Curtin University: Perth, WA.)
Grice, A. C., Westoby, M., and Torpy, C. (1994). Dynamics and population structure of Acacia victoriae Benth. Australian Journal of Ecology 19, 10–16.
| Dynamics and population structure of Acacia victoriae Benth.Crossref | GoogleScholarGoogle Scholar |
Harper, J. L. (1967). A Darwinian approach to plant ecology. Journal of Ecology 55, 247–270.
| A Darwinian approach to plant ecology.Crossref | GoogleScholarGoogle Scholar |
Harper, J. L., and White, J. (1974). The demography of plants. Annual Review of Ecology and Systematics 5, 419–463.
| The demography of plants.Crossref | GoogleScholarGoogle Scholar |
Jurade, E., Westoby, M., and Nelson, D. (1991). Seed size and dispersal in arid Australia. Journal of Ecology 79, 811–830.
Kelly, D., and Sork, V. L. (2002). Mast seeding in perennial plants: why, how, where? Annual Review of Ecology and Systematics 33, 427–447.
| Mast seeding in perennial plants: why, how, where?Crossref | GoogleScholarGoogle Scholar |
Mabbutt, J. A., Litchfield, W. H., Speck, N. H., Sofoulis, J., Wilcox, D. G., Arnold, J. M., Brookfield, M., and Wright, R. L. (1963). ‘General report on the lands of the Wiluna-Meekatharra Area, Western Australia, 1958.’ Land Research Series No. 7. (CSIRO: Melbourne, Vic.)
Morton, S. R., Stafford Smith, D. M., Dickman, C. R., Dunkerley, D. L., Freidel, M. H., McAllister, R. R. J., Reid, J. R. W., Roshier, D. A., Smith, M. A., Walsh, F. J., Wardle, G. M., Watson, I. W., and Westoby, M. (2011). A fresh framework for the ecology of arid Australia. Journal of Arid Environments 75, 313–329.
| A fresh framework for the ecology of arid Australia.Crossref | GoogleScholarGoogle Scholar |
Mott, J. J. (1972a). The autecology of annuals in an arid region of Western Australia. PhD Thesis, University of Western Australia, Perth, WA, Australia.
Mott, J. J. (1972b). Germination studies on some annual species from an arid region of Western Australia. Journal of Ecology 60, 293–304.
| Germination studies on some annual species from an arid region of Western Australia.Crossref | GoogleScholarGoogle Scholar |
Mott, J. J. (1973). Temporal and spatial distribution of an annual flora in an arid region of Western Australia. Tropical Grasslands 7, 89–97.
Mott, J. J. (1974). Factors affecting seed germination in three annual species from an arid region of Western Australia. Journal of Ecology 62, 699–709.
| Factors affecting seed germination in three annual species from an arid region of Western Australia.Crossref | GoogleScholarGoogle Scholar |
Mott, J. J., and McComb, A. J. (1974). Patterns in annual vegetation and soil microrelief in an arid region of Western Australia. Journal of Ecology 62, 115–126.
| Patterns in annual vegetation and soil microrelief in an arid region of Western Australia.Crossref | GoogleScholarGoogle Scholar |
Nix, H. A., and Austin, M. P. (1973). Mulga: a bioclimatic analysis. Tropical Grasslands 7, 9–21.
Nixon, M., and Lefroy, R. F. B. (1995). ‘Road to the Murchison.’ (Murchison Shire: Perth, WA.)
Paczkowska, G., and Chapman, A. R. (2000). ‘The Western Australian Flora: A Descriptive Catalogue.’ (Western Australian Herbarium: Perth, WA.)
Sandell, P., Kube, P., and Chuk, M. (1986). Dryland tree establishment in Central Australia. Forest Ecology and Management 16, 411–422.
| Dryland tree establishment in Central Australia.Crossref | GoogleScholarGoogle Scholar |
Sinclair, R. (2004). Persistence of dead trees and fallen timber in the arid zone: 76 years of data from the T.G.B. Osborn Vegetation Reserve, Koonamore, South Australia. The Rangeland Journal 26, 111–122.
| Persistence of dead trees and fallen timber in the arid zone: 76 years of data from the T.G.B. Osborn Vegetation Reserve, Koonamore, South Australia.Crossref | GoogleScholarGoogle Scholar |
Sinclair, R. (2005). Long-term changes in vegetation, gradual and episodic, on the T.G.B. Osborn Vegetation Reserve, Koonamore, South Australia (1926–2002). Australian Journal of Botany 53, 283–296.
| Long-term changes in vegetation, gradual and episodic, on the T.G.B. Osborn Vegetation Reserve, Koonamore, South Australia (1926–2002).Crossref | GoogleScholarGoogle Scholar |
Tamm, C. O. (1948). Observations on reproduction and survival of some perennial herbs. Botaniska Notiser 3, 305–321.
Tamm, C. O. (1956). Further observations on the survival and flowering of some perennial herbs. Oikos 7, 273–292.
| Further observations on the survival and flowering of some perennial herbs.Crossref | GoogleScholarGoogle Scholar |
