Floristic composition and pasture condition of Aristida/Bothriochloa pastures in central Queensland. I. Pasture floristics
R. G. Silcock A E , T. J. Hall B , P. G. Filet C , A. M. Kelly B , D. Osten C , C. M. Schefe D and P. T. Knights DA Queensland Department of Agriculture, Fisheries and Forestry, GPO Box 267, Brisbane, Qld 4102, Australia.
B Queensland Department of Agriculture, Fisheries and Forestry, PO Box 102, Toowoomba, Qld 4350, Australia.
C Formerly Queensland Department of Primary Industries and Fisheries, Emerald, Qld 4720, Australia.
D Formerly Queensland Department of Primary Industries and Fisheries, Roma, Qld 4455, Australia.
E Corresponding author. Email: Richard.Silcock@daff.qld.gov.au
The Rangeland Journal 37(2) 199-215 https://doi.org/10.1071/RJ14106
Submitted: 8 August 2014 Accepted: 16 February 2015 Published: 27 March 2015
Abstract
A survey was conducted in central inland Queensland, Australia of 108 sites that were deemed to contain Aristida/Bothriochloa native pastures to quantitatively describe the pastures and attempt to delineate possible sub-types. The pastures were described in terms of their floristic composition, plant density and crown cover. There were generally ~20 (range 5–33) main pasture species at a site. A single dominant perennial grass was rare with three to six prominent species the norm. Chrysopogon fallax (golden-beard grass) was the perennial grass most consistently found in all pastures whereas Aristida calycina (dark wiregrass), Enneapogon spp. (bottlewasher grasses), Brunoniella australis (blue trumpet) and Panicum effusum (hairy panic) were all regularly present. The pastures did not readily separate into broad floristic sub-groups, but three groups that landholders could recognise from a combination of the dominant tree and soil type were identified. The three groups were Eucalyptus crebra (narrow-leaved ironbark), E. melanophloia (silver-leaved ironbark) and E. populnea (poplar box). The pastures of the three main sub-groups were then characterised by the prominent presence, singly or in combination, of Bothriochloa ewartiana (desert bluegrass), Eremochloa bimaculata (poverty grass), Bothriochloa decipiens (pitted bluegrass) or Heteropogon contortus (black speargrass). The poplar box group had the greatest diversity of prominent grasses whereas the narrow-leaved ironbark group had the least. Non-native Cenchrus ciliaris (buffel grass) and Melinis repens (red Natal grass) were generally present at low densities.
Describing pastures in terms of frequency of a few species or species groups sometimes failed to capture the true nature of the pasture but plant abundance for most species, as density, herbage mass of dry matter or plant crown cover, was correlated with its recorded frequency. A quantitative description of an average pasture in fair condition is provided but it was not possible to explain why some species often occur together or fail to co-exist in Aristida/Bothriochloa pastures, for example C. ciliaris and E. bimaculata rarely co-exist whereas Tragus australianus (small burrgrass) and Enneapogon spp. are frequently recorded together. Most crown cover was provided by perennial grasses but many of these are Aristida spp. (wiregrasses) and not regarded as useful forage for livestock. No new or improved categorisation of the great variation evident in the Aristida/Bothriochloa native pasture type can be given despite the much improved detail provided of the floristic composition by this survey.
Additional keywords: Chrysopogon fallax, crown cover, herbage mass, indicator species, plant density, sedges.
References
Beeston, G. R. (1978). Vegetation. In: ‘Western Arid Region Land-use Study, Part IV’. Queensland Department of Primary Industries, Division of Land Utilisation, Technical Bulletin 23. pp. 36–50. (Queensland Department of Primary Industries: Brisbane, Qld.)Breman, H., and Cissé, A. M. (1977). Dynamics of Sahelian pastures in relation to drought and grazing. Oecologia 28, 301–315.
| Dynamics of Sahelian pastures in relation to drought and grazing.Crossref | GoogleScholarGoogle Scholar |
Chilcott, C. R., Sandral, C. J., Aisthorpe, J. L., Paton, C. J., and McCallum, B. S. (2005). ‘Grazing Land Management – Fitzroy Basin Version Workshop Notes.’ (Meat and Livestock Australia: North Sydney, NSW.)
de Kroon, H., and Olff, H. (1995). On the use of the guild concept in plant ecology. Folia Geobotanica 30, 519–528.
| On the use of the guild concept in plant ecology.Crossref | GoogleScholarGoogle Scholar |
Fairfax, R. J., and Fensham, R. J. (2000). The effect of exotic pasture development on floristic diversity in central Queensland, Australia. Biological Conservation 94, 11–21.
| The effect of exotic pasture development on floristic diversity in central Queensland, Australia.Crossref | GoogleScholarGoogle Scholar |
FloraBase (2014). FloraBase – the Western Australian flora. Department of Parks and Wildlife. Available at: http://florabase.dpaw.wa.gov.au/ (accessed 23 January 2015).
FutureBeef (2014). Land types of Queensland. Available at: http://futurebeef.com.au/topics/grazing-land-management/land-types-of-queensland/ (accessed 23 January 2015).
Genstat (2013). ‘Genstat Release 16.1.’ (VSN International Limited: Hemel Hempstead, UK.)
Grosenbraugh, L. R. (1952). Plotless timber estimates. Journal of Forestry 50, 32–37.
Hall, T. J., Filet, P. G., Banks, B., and Silcock, R. G. (1994). State and transition models for rangelands. 11. A state and transition model for the Aristida-Bothriochloa pasture community of central and southern Queensland. Tropical Grasslands 28, 270–273.
Henderson, R. J. F. (1997). ‘Queensland Plants: Names and Distribution.’ (Queensland Herbarium, Department of Environment: Brisbane, Qld.)
Hunt, L. P., McIvor, J. G., Grice, A. C., and Bray, S. G. (2014). Principles and guidelines for managing cattle grazing in the grazing lands of northern Australia: stocking rates, pasture resting, prescribed fire, paddock size and water points – a review. The Rangeland Journal 36, 105–119.
Illius, A. W., and O’Connor, T. G. (1999). On the relevance of non-equilibrium concepts to arid and semi-arid grazing systems. Ecological Applications 9, 798–813.
| On the relevance of non-equilibrium concepts to arid and semi-arid grazing systems.Crossref | GoogleScholarGoogle Scholar |
Isbell, R. F., Thompson, C. H., Hubble, G. D., Beckmann, G. G., and Paton, T. R. (1967). ‘Atlas of Australian Soils. Sheet 4 Brisbane Charleville Rockhampton Clermont area, with Explanatory Booklet.’ (CSIRO and MUP: Melbourne, Vic.)
McIntyre, S., and Filet, P. G. (1997). Choosing appropriate taxonomic units for ecological survey and experimentation: the response of Aristida to management and landscape factors as an example. The Rangeland Journal 19, 26–39.
| Choosing appropriate taxonomic units for ecological survey and experimentation: the response of Aristida to management and landscape factors as an example.Crossref | GoogleScholarGoogle Scholar |
McIntyre, S., and Lavoral, S. (2001). Livestock grazing in sub-tropical pastures: steps in the analysis of attribute response and plant functional types. Journal of Ecology 89, 209–226.
| Livestock grazing in sub-tropical pastures: steps in the analysis of attribute response and plant functional types.Crossref | GoogleScholarGoogle Scholar |
McIntyre, S., and Tongway, D. (2005). Grassland structure in native pastures: links to soil surface condition. Ecological Management & Restoration 6, 43–50.
| Grassland structure in native pastures: links to soil surface condition.Crossref | GoogleScholarGoogle Scholar |
McIvor, J. G. (2007). Pasture management in semi-arid tropical woodlands: dynamics of perennial grasses. The Rangeland Journal 29, 87–100.
McIvor, J. G., and Scanlan, J. C. (1994). State and transition models for rangelands. 8. A state and transition model for the northern spear-grass zone. Tropical Grasslands 28, 256–259.
McKenzie, N. J., Jacquier, D. W., Ashton, L. J., and Cresswell, H. P. (2000). ‘Estimation of Soil Properties Using the Atlas of Australian Soils.’ CSIRO Land and Water Technical Report 11/00. (CSIRO: Melbourne, Vic.)
O’Reagain, P. J., and Bushell, J. J. (2011). ‘The Wambiana Grazing Trial. Key Learnings for Sustainable and Profitable Management in a Variable Environment.’ (Department of Employment, Economic Development and Innovation, Queensland: Brisbane, Qld.)
O’Reagain, P., Scanlan, J., Hunt, L., Cowley, R., and Walsh, D. (2014). Sustainable grazing management for temporal and spatial variability in north Australian rangelands – a synthesis of the latest evidence and recommendations. The Rangeland Journal 36, 223–232.
| Sustainable grazing management for temporal and spatial variability in north Australian rangelands – a synthesis of the latest evidence and recommendations.Crossref | GoogleScholarGoogle Scholar |
Orr, D. M., Burrows, W. H., Hendricksen, R. E., Clem, R. L., Rutherford, M. T., Conway, M. J., Myles, D. J., Back, P. V., and Paton, C. J. (2001). Pasture yield and composition changes in Central Queensland black speargrass (Heteropogon contortus) pasture in relation to grazing management options. Australian Journal of Experimental Agriculture 41, 477–485.
| Pasture yield and composition changes in Central Queensland black speargrass (Heteropogon contortus) pasture in relation to grazing management options.Crossref | GoogleScholarGoogle Scholar |
QGraze (1994). ‘QGraze – Monitoring the Condition of Queensland’s Grazing Lands.’ (Queensland Department of Primary Industries: Brisbane, Qld.)
Roberts, B. R. (1972). ‘Ecological Studies on Pasture Condition in Semi-arid Queensland.’ (Queensland Department of Primary Industries: Brisbane, Qld.)
Rolfe, J., Golding, T., and Cowan, D. (1997). ‘Is Your Pasture Past it? The Glove Box Guide to Native Pasture Identification in North Queensland.’ Queensland Department of Primary Industries Information Series QI97083. (Queensland Department of Primary Industries: Brisbane, Qld.)
Scanlan, J. C., McIvor, J. G., Bray, S. G., Cowley, R. A., Hunt, L. P., Pahl, L. I., MacLeod, N. D., and Whish, G. L. (2014). Resting pastures to improve land condition in northern Australia: guidelines based on the literature and simulation modelling. The Rangeland Journal 36, 429–443.
Schefe, C. M., Graham, T. W. G., and Hall, T. H. (1993). ‘A Floristic Description of the Pasture Land Types of the Maranoa.’ Queensland Department of Primary Industries, Project Report Series QO93003. (Queensland Department of Primary Industries: Brisbane, Qld.)
Shaw, N. H., and ‘t Mannetje, L. (1970). Studies on a speargrass pasture in central coastal Queensland – the effect of fertilizer, stocking rate, and oversowing with Stylosanthes humilis on beef production and botanical composition. Tropical Grasslands 4, 43–56.
Silcock, R. G. (1993). Pasture composition in the Western Downs and Maranoa region of Queensland – does it really matter? In: ‘The Management of Grazing Lands in the Western Downs and Maranoa’. Queensland Department of Primary Industries Conference and Workshop Series, QC93003. (Ed. R. Clark.) pp. 113–137. (Queensland Department of Primary Industries: Brisbane, Qld.)
Silcock, R. G., Filet, P. G., Hall, T. J., Thomas, E. C., Day, K. A., Kelly, A. M., Knights, P. T., Robertson, B. A., and Osten, D. (1996). ‘Enhancing Pasture Stability and Profitability for Producers in Aristida/Bothriochloa Woodlands. (DAQ.090).’ Final Report (1992–1996) to Meat Research Corporation. (Meat and Livestock Australia: North Sydney, NSW.)
Silcock, R. G., Hall, T. J., Filet, P. G., Kelly, A. M., Osten, D., and Graham, T. W. G. (2015). Floristic composition and pasture condition of Aristida/Bothriochloa pastures in central Queensland. II. Soil and pasture condition interactions. The Rangeland Journal 37, 217–226.
Simon, B. K., and Alfonso, Y. (2014). AusGrass2: grasses of Australia. Available at: http://ausgrass2.myspecies.info/content/aristida (accessed 23 January 2015).
Spain, J., and Andrew, C. S. (1978). ‘Mineral Characteristics of Species. Responses of Tropical Grasses to Aluminium in Water Culture.’ Division of Tropical Crops and Pastures Annual Report 1976–77. (CSIRO Division of Tropical Crops and Pastures: Brisbane, Qld.)
Story, R., Galloway, R. W., Gunn, R. H., and Fitzpatrick, E. A. (1967). ‘Lands of the Isaac-Comet Area, Queensland.’ CSIRO Land Research Series 19. (CSIRO: Melbourne, Vic.)
Tongway, D. J. (1994). ‘Rangeland Soil Condition Assessment Manual.’ (CSIRO: Melbourne, Vic.)
Tothill, J. C., and Gillies, C. (1992). ‘The Pasture Lands of Northern Australia. Their Condition, Productivity and Sustainability.’ Occasional Publication No. 5. (Tropical Grasslands Society of Australia: Brisbane, Qld.)
Wandera, F. P., Kerridge, P. C., Taylor, J. A., and Shelton, H. M. (1993). Changes in productivity associated with replacement of Heteropogon contortus by Aristida species and Chrysopogon fallax in the savannas of south east Queensland. In: ‘Proceedings of the XVII International Grassland Congress’. (Eds M. J. Baker, J. R. Crush and L. R. Humphries.) pp. 352–353. (New Zealand Grassland Association: Palmerston North, New Zealand.)
Weston, E. J., Harbison, J., Leslie, J. K., Rosenthal, K. M., and Mayer, R. J. (1981). ‘Assessment of the Agricultural Potential of Queensland.’ Agriculture Branch Technical Report No. 27. (Queensland Department of Primary Industries: Brisbane, Qld.)
Whalley, R. D. B., and Hardy, M. B. (2000). Measuring botanical composition of grasslands. In: ‘Field and Laboratory Methods for Grassland and Animal Production Research’. (Eds L.’t Mannetje and R. M. Jones.) pp. 67–102. (CAB International: Wallingford, UK.)
