Ephemeral plant indicators of livestock grazing in arid rangelands during wet conditions
Helen P. Waudby A B C and Sophie Petit A
+ Author Affiliations
- Author Affiliations
A Sustainable Environments Research Group, School of Natural and Built Environments, University of South Australia, Mawson Lakes, SA 5095, Australia.
B Present address: Institute for Land, Water and Society, Charles Sturt University, Albury, NSW 2640, Australia.
C Corresponding author. Email: hpwaudby@gmail.com
The Rangeland Journal 37(3) 323-330 https://doi.org/10.1071/RJ14118
Submitted: 30 October 2014 Accepted: 27 April 2015 Published: 15 May 2015
Abstract
Vegetation communities in arid rangeland systems are typically dominated by short-lived, ephemeral (annual) plants during periods of high rainfall. These conditions present a rare opportunity to examine herbivore–plant interactions and identify potential indicators of grazing intensity. The influence of cattle grazing on vegetation communities of arid cracking-clay gibber-gilgai systems in Australian rangelands was investigated during La Niña (wet) conditions, including 2010, which was the wettest year on record in the region. Seasonal annual plant diversity was assessed at three grazed and three less-grazed sites. Individual annual species’ responses to grazing intensity were examined among grazed and less-grazed sites (i.e. increasing or decreasing response). Additionally, rare (found at one site only) and restricted (found at grazed or less-grazed sites only) annual and perennial species were identified to elucidate their status as indicators. Prevailing La Niña conditions allowed the study of little-known, short-lived species, which constituted the bulk of species richness. Differences in grazing intensity were more clearly ascertained from examining individual species than plant diversity. Of 31 annual/short-lived species, 21 responded to grazing intensity. Although most species responded to grazing (n = 7 increasers and n = 14 decreasers), these responses did not necessarily reflect published accounts of their so-called palatability. Thirty other species were restricted to certain site types (grazed or less-grazed) and 20 were rare. The indicator species concept should be applied at appropriate scales, and more detailed information is needed on stock preferences for these ephemeral plants in these rangeland systems. Elucidating the effect of grazing on individual plant species’ phenology, and identifying indicators, is important for developing efficacious land management practices.
Additional keywords: Asteraceae, Chenopodiaceae, Compositae, grazing indicators, non-equilibrium, palatability, rangeland management, Shannon–Weiner index.
References
Boone, R. B., and Wang, G. (2007). Cattle dynamics in African grazing systems under variable climates. Journal of Arid Environments 70, 495–513.| Cattle dynamics in African grazing systems under variable climates.Crossref | GoogleScholarGoogle Scholar |
Brockwell, J., Evans, C. M., Bowman, A. M., and McInnes, A. (2010). Distribution, frequency of occurrence and symbiotic properties of the Australian native legume Tirogonella suavissima Lindl. and its associated root-nodule bacteria. The Rangeland Journal 32, 395–406.
| Distribution, frequency of occurrence and symbiotic properties of the Australian native legume Tirogonella suavissima Lindl. and its associated root-nodule bacteria.Crossref | GoogleScholarGoogle Scholar |
Bureau of Meteorology (2012). Bureau of Meteorology. Available at: www.bom.gov.au (accessed 18 November 2012).
Cousins, S. H. (1991). Species diversity measurement: choosing the right index. Trends in Ecology & Evolution 6, 190–192.
| Species diversity measurement: choosing the right index.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BC3sfotFSmuw%3D%3D&md5=14c170edab73332ad677bbf0cac392c6CAS |
Cunningham, G., Mulham, B., Milthorpe, P., and Leigh, J. (1992). ‘Plants of Western New South Wales.’ (Inkata Press: Melbourne.)
Dixon, S. (1892). The effects of settlement and pastoral occupation in Australia upon the indigenous vegetation. Transactions of the Royal Society of South Australia 15, 195–206.
Dorrough, J., Ash, J., and McIntyre, S. (2004). Plant responses to livestock grazing frequency in an Australian temperate grassland. Ecography 27, 798–810.
| Plant responses to livestock grazing frequency in an Australian temperate grassland.Crossref | GoogleScholarGoogle Scholar |
Dyksterhuis, E. J. (1949). Condition and management of rangelands based on quantitative ecology. Journal of Range Management 2, 104–115.
| Condition and management of rangelands based on quantitative ecology.Crossref | GoogleScholarGoogle Scholar |
Fensham, R. J., Fairfax, R. J., and Dwyer, J. M. (2010). Vegetation responses to the first 20 years of cattle grazing in an Australian desert. Ecology 91, 681–692.
| Vegetation responses to the first 20 years of cattle grazing in an Australian desert.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BC3c3ps1aquw%3D%3D&md5=641d3a4ef048519ec19a9edf6fb2b36cCAS | 20426328PubMed |
Fensham, R. J., Silcock, J. L., and Dwyer, J. M. (2011). Plant species richness responses to grazing protection and degradation history in a low productivity landscape. Journal of Vegetation Science 22, 997–1008.
| Plant species richness responses to grazing protection and degradation history in a low productivity landscape.Crossref | GoogleScholarGoogle Scholar |
Fernandez-Gimenez, M. E., and Allen-Diaz, B. (1999). Testing a non-equilibrium model of rangeland vegetation dynamics in Mongolia. Journal of Applied Ecology 36, 871–885.
| Testing a non-equilibrium model of rangeland vegetation dynamics in Mongolia.Crossref | GoogleScholarGoogle Scholar |
Foran, B. D., and Stafford Smith, D. M. (1991). Risk, biology and drought management strategies for cattle stations in central Australia. Journal of Environmental Management 33, 17–33.
| Risk, biology and drought management strategies for cattle stations in central Australia.Crossref | GoogleScholarGoogle Scholar |
Frank, A. S. K., Dickman, C. R., Wardle, G. M., and Greenville, A. C. (2013). Interactions of grazing history, cattle removal and time since rain drive divergent short-term responses by desert biota. PLoS One 8, .
| Interactions of grazing history, cattle removal and time since rain drive divergent short-term responses by desert biota.Crossref | GoogleScholarGoogle Scholar |
Freeland, W. J. (1990). Large herbivorous mammals: exotic species in northern Australia. Journal of Biogeography 17, 445–449.
| Large herbivorous mammals: exotic species in northern Australia.Crossref | GoogleScholarGoogle Scholar |
Friedel, M. H. (1987). Evaluation of methods for monitoring sparse patterned vegetation in arid rangelands. II. Trees and shrubs. Journal of Environmental Management 25, 309–318.
Friedel, M. H., Sparrow, A. D., Kinloch, J. E., and Tongway, D. J. (2003). Degradation and recovery processes in arid grazing lands of central Australia. Part 2: vegetation. Journal of Arid Environments 55, 327–348.
| Degradation and recovery processes in arid grazing lands of central Australia. Part 2: vegetation.Crossref | GoogleScholarGoogle Scholar |
Fynn, R. W. S., and O’Connor, T. G. (2000). Effect of stocking rate and rainfall on rangeland dynamics and cattle performance in a semi-arid savanna. South African Journal of Applied Ecology 37, 491–507.
Gibbs, M. (1994). Classifying property management and resources in an Australian chenopod shrubland. Journal of Environmental Management 18, 215–227.
Holmes, J. H., and Knight, L. D. P. (1994). Pastoral lease tenure in Australia: historical relic or useful contemporary tool? The Rangeland Journal 16, 106–121.
| Pastoral lease tenure in Australia: historical relic or useful contemporary tool?Crossref | GoogleScholarGoogle Scholar |
James, C. D., Landsberg, J., and Morton, S. R. (1999). Provision of watering points in the Australian arid zone: a review of effects on biota. Journal of Arid Environments 41, 87–121.
| Provision of watering points in the Australian arid zone: a review of effects on biota.Crossref | GoogleScholarGoogle Scholar |
Jost, L. (2006). Entropy and diversity. Oikos 113, 363–375.
| Entropy and diversity.Crossref | GoogleScholarGoogle Scholar |
Kutsche, F., and Lay, B. (2003). ‘Field Guide to the Plants of Outback South Australia.’ (Department of Water, Land and Biodiversity Conservation: Adelaide, SA.)
Landsberg, J., and Crowley, G. (2004). Monitoring rangeland biodiversity: plants as indicators. Austral Ecology 29, 59–77.
| Monitoring rangeland biodiversity: plants as indicators.Crossref | GoogleScholarGoogle Scholar |
Landsberg, J., Lavorel, S., and Stol, J. (1999). Grazing response groups among understorey plants in arid rangelands. Journal of Vegetation Science 10, 683–696.
| Grazing response groups among understorey plants in arid rangelands.Crossref | GoogleScholarGoogle Scholar |
Landsberg, J., James, C. D., Morton, S. R., Müller, W. J., and Stol, J. (2003). Abundance and composition of plant species along grazing gradients in Australian rangelands. Journal of Applied Ecology 40, 1008–1024.
| Abundance and composition of plant species along grazing gradients in Australian rangelands.Crossref | GoogleScholarGoogle Scholar |
Lange, R. (1969). The piosphere: sheep track and dung patterns. Journal of Range Management 22, 396–401.
| The piosphere: sheep track and dung patterns.Crossref | GoogleScholarGoogle Scholar |
Leigh, J. H. (1981). Chenopod shrublands. In: ‘Australian Vegetation’. (Ed. R. H. Groves.) pp. 276–292. (Cambridge University Press: Cambridge, UK.)
Ludwig, J. A., Eager, R. W., Williams, R. J., and Lowe, L. M. (1999). Declines in vegetation patches, plant diversity, and grasshopper diversity near cattle watering-points in the Victoria River district, Northern Australia. The Rangeland Journal 21, 135–149.
| Declines in vegetation patches, plant diversity, and grasshopper diversity near cattle watering-points in the Victoria River district, Northern Australia.Crossref | GoogleScholarGoogle Scholar |
Mori, A. S. (2011). Ecosystem management based on natural disturbances: hierarchical context and non-equilibrium paradigm. Journal of Applied Ecology 48, 280–292.
| Ecosystem management based on natural disturbances: hierarchical context and non-equilibrium paradigm.Crossref | GoogleScholarGoogle Scholar |
Morton, S. R., Stafford Smith, D. M., Friedel, M. H., Griffin, G. F., and Pickup, G. (1995). The stewardship of arid Australia: ecology and landscape management. Journal of Environmental Management 43, 195–217.
| The stewardship of arid Australia: ecology and landscape management.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 |
Mueller-Dombois, E., and Ellenberg, H. (1974). ‘Aims and Methods of Vegetation Ecology.’ (John Wiley and Sons: Indianapolis, IL.)
Muthoni, F. K., Groen, T. A., Skidmore, A. K., and van Oel, P. (2014). Ungulate herbivory overrides rainfall impacts on herbaceous regrowth and residual biomass in a key resource area. Journal of Arid Environments 100–101, 9–17.
| Ungulate herbivory overrides rainfall impacts on herbaceous regrowth and residual biomass in a key resource area.Crossref | GoogleScholarGoogle Scholar |
National Herbarium of NSW (2012). PlantNet. Available at: http://plantnet.rbgsyd.nsw.gov.au (accessed 30 November 2012).
Paton, T. R. (1974). Origin and terminology for gilgai in Australia. Geoderma 11, 221–242.
| Origin and terminology for gilgai in Australia.Crossref | GoogleScholarGoogle Scholar |
Pickup, G., Bastin, G. N., and Chewings, V. H. (1998). Identifying trends in land degradation in non-equilibrium rangelands. Journal of Applied Ecology 35, 365–377.
| Identifying trends in land degradation in non-equilibrium rangelands.Crossref | GoogleScholarGoogle Scholar |
Seymour, C. L., Milton, S. J., Joseph, G. S., Dean, W. R. J., Ditlhobolo, T., and Cumming, G. S. (2010). Twenty years of rest returns grazing potential, but not palatable plant diversity, to Karoo rangeland. South African Journal of Applied Ecology 47, 859–867.
Silcock, J. L., and Fensham, R. J. (2013). Arid vegetation in disequilibrium with livestock grazing: evidence from long-term exclosures. Austral Ecology 38, 57–65.
| Arid vegetation in disequilibrium with livestock grazing: evidence from long-term exclosures.Crossref | GoogleScholarGoogle Scholar |
Silcock, J. L., Piddocke, T. P., and Fensham, R. J. (2013). Illuminating the dawn of pastoralism: evaluating the record of European explorers to inform landscape change. Biological Conservation 159, 321–331.
| Illuminating the dawn of pastoralism: evaluating the record of European explorers to inform landscape change.Crossref | GoogleScholarGoogle Scholar |
Smyth, A. K., Brandle, R., Chewings, V., Read, J., Brook, A., and Fleming, M. (2009). A framework for assessing regional biodiversity condition under changing environments of the arid Australian rangelands. The Rangeland Journal 31, 87–101.
| A framework for assessing regional biodiversity condition under changing environments of the arid Australian rangelands.Crossref | GoogleScholarGoogle Scholar |
State Herbarium of South Australia (2012). Electronic flora of South Australia. Available at: www.flora.sa.gov.au (accessed 30 November 2012).
Sternberg, M., Gutman, M., Perevolotsky, A., and Kigel, J. (2003). Effects of grazing on soil seed bank dynamics: an approach with functional groups. Journal of Vegetation Science 14, 375–386.
| Effects of grazing on soil seed bank dynamics: an approach with functional groups.Crossref | GoogleScholarGoogle Scholar |
Tiver, F., and Andrew, M. H. (1997). Relative effects of herbivory by sheep, rabbits, goats and kangaroos on recruitment and regeneration of shrubs and trees in eastern South Australia. Journal of Applied Ecology 34, 903–914.
| Relative effects of herbivory by sheep, rabbits, goats and kangaroos on recruitment and regeneration of shrubs and trees in eastern South Australia.Crossref | GoogleScholarGoogle Scholar |
von Wehrden, H., Hanspach, J., Kaczensky, P., Fischer, J., and Wesche, K. (2012). Global assessment of the non-equilibrium concept in rangelands. Ecological Applications 22, 393–399.
| Global assessment of the non-equilibrium concept in rangelands.Crossref | GoogleScholarGoogle Scholar | 22611842PubMed |
Waudby, H. P. (2013). Effects of cattle grazing on the biodiversity of cracking-clay gibber-gilgai systems in the arid South Australian rangelands. PhD Thesis, University of South Australia, Adelaide, Australia.
Waudby, H. P., Petit, S., and Robinson, G. (2012). Pastoralists’ perceptions of biodiversity and land management strategies in the arid Stony Plains region of South Australia: implications for policy-makers. Journal of Environmental Management 112, 96–103.
| Pastoralists’ perceptions of biodiversity and land management strategies in the arid Stony Plains region of South Australia: implications for policy-makers.Crossref | GoogleScholarGoogle Scholar | 22885369PubMed |
Waudby, H. P., Petit, S., and Robinson, G. (2013a). Pastoralists’ knowledge of plant palatability and grazing indicators in an arid region of South Australia. The Rangeland Journal 35, 445–454.
| Pastoralists’ knowledge of plant palatability and grazing indicators in an arid region of South Australia.Crossref | GoogleScholarGoogle Scholar |
Waudby, H. P., Petit, S., and Brown, G. (2013b). Use of creeks and gilgaied stony plains by cattle in arid rangelands during a wet summer: a case study with GPS/VHF radio collars. Range Management and Agroforestry 34, 101–107.
