Sinclair, K., A. Rawluk, S. Kumar, and A. Curtis. 2017. Ways forward for resilience thinking: lessons from the field for those exploring social-ecological systems in agriculture and natural resource management. Ecology and Society 22(4):21. https://doi.org/10.5751/ES-09705-220421

Total grazing pressure (TGP) is a key driver of productivity in livestock systems in the south-eastern rangelands of Australia. Sustainable grazing in these environments requires the management of grazing pressure from kangaroos, unmanaged goats and feral pigs, as well as livestock. Any practices used to control these species must be socially acceptable. Twenty-four semi-structured interviews with individuals drawn from key stakeholder groups were conducted to assess the acceptability of control practices for each of these species. Commercial shooting was the most acceptable control practice for kangaroos with a much lower acceptance of non-commercial shooting. A trap yard (at a water point) was the most acceptable practice for control of unmanaged goats with shooting least acceptable. Ground shooting, trapping and 1080 baiting were the most acceptable practices for control of feral pigs with dogging least acceptable. The two key criteria for social acceptance of control practices by stakeholder group interviewees were humaneness and effectiveness. Acceptance was also influenced by interviewees’ attitudes towards particular species. Interviewees typically distinguished between control of native wildlife and ‘feral’ animals, and between ‘resource’ animals and ‘pest’ animals. Importantly, support for control programs to manage TGP must be justifiable and employ practices that are socially acceptable.

The influence of regrowth time on the forage quality of prairie grass (Bromus willdenowii Kunth. cv. Matua), perennial ryegrass (Lolium perenne L. cv. Dobson) and tall fescue (Festuca arundinacea Schreb. cv. Dovey) was determined under non-limiting soil nutrient and moisture growth conditions. In a glasshouse, individual plants of each species were arranged in separate mini-swards and were defoliated at 6, 10 and 14 weeks after sowing to a stubble height of 60 mm for perennial ryegrass and tall fescue and 90 mm for prairie grass. Following defoliation at 14 weeks, selected individual plants were cut to the previous stubble height as each new leaf per tiller was fully expanded, to provide leaf material for nutrient analysis, until prairie grass, perennial ryegrass and tall fescue had attained 6–8, 5 and 3 leaves/tiller, respectively. The concentration of leaf phosphorus (P) decreased from 6.6 to 5.9 g/kg dry matter (DM) in prairie grass, increased from 5.9 to 6.9 g/kg DM in perennial ryegrass, and initially increased to 8.8 g/kg DM and then decreased to 8.4 g/kg DM in tall fescue. The mean potassium (K) content in perennial ryegrass was 29.6 g/kg DM and was not significantly affected by duration of regrowth, whereas K content in prairie grass and tall fescue fell from 51.7 to 43.6 g/kg DM and from 55.5 to 47.9 g/kg DM, respectively, after the first leaf per tiller formed. Calcium levels increased with regrowth in all species and at the completion of regrowth were 5.8, 3.8 and 3.4 g/kg DM in prairie grass, perennial ryegrass and tall fescue, respectively. The magnesium (Mg) and sodium (Na) content of perennial ryegrass showed no change throughout the regrowth period and had measured values of 2.5 and 2.8 g/kg DM, respectively. For tall fescue, the concentration of leaf Mg decreased from 0.30 to 0.24 g/kg DM, whereas the Na concentration increased from 1.2 to 2.1 g/kg DM. The Mg content of prairie grass remained constant at 2.0 g/kg DM, whereas the Na content increased from 2.7 to 4.3 (g/kg DM). While the crude protein content of all grasses declined over the regrowth period, values remained over 200 g/kg DM, well above the recommended content for lactating cows. The leaf water-soluble carbohydrate (WSC) of prairie grass and perennial ryegrass increased over the regrowth period from 29.7 to 43.9 g/kg DM and from 25.9 to 72.5 g/kg DM, respectively, whereas tall fescue showed no change at 55.6 g/kg DM. The change in in vitro organic matter digestibility (OMD) with age was 125 and 44 (g/kg DM) for tall fescue and perennial ryegrass, respectively. The OMD of prairie grass decreased following the onset of stem elongation at the 5-leaves/tiller stage of regrowth from 824 to 756 g/kg DM. In this glasshouse study, the pattern of change in K and Ca content was the same as observed in the field but the absolute content, including that of Na, was greatly elevated, particularly in prairie grass. In terms of nutrient content capability, N, P and K were readily taken up by these C3 grasses, while the uptake of Mg and Na appear to reflect genetic differences between species. The differences in forage quality as determined under optimal growth conditions in this study, as compared with field grown forage, are presumed to indicate possible soil nutrient deficiencies in field situations.

Sustainable grazing in the nationally iconic southern rangelands of Australia requires landholders to actively manage the grazing pressure from both domestic livestock and non-domestic herbivores. Landholders have primary responsibility for controlling the non-domestic herbivores. In doing so, they must meet the Australian public’s expectations for resource conservation (mainly a public good) and animal welfare. Governments are also involved in the management of non-domestic herbivores via native and feral animal legislation and control programs. The Australian public will not accept cruelty to animals, perceived or otherwise. In this paper we explore the challenges faced by landholders in their attempts to manage the grazing pressure from native herbivores, particularly kangaroos, feral goats and feral pigs, while meeting the Australian public’s expectations for animal welfare. Landholders typically live on extensive properties and their capacity to manage these is influenced by high climate variability, low labour availability, commodity price fluctuations and limited capital available for investment in new technologies. The additional requirement to reduce the grazing pressure from kangaroos, feral goats and feral pigs is a significant burden on already time-poor landholders. Hence, there is a critical disparity between landholders’ capacity and their responsibility to effectively manage the non-domestic herbivores on their properties. We suggest that current expectations of landholders to deliver public benefits by publicly acceptable practices are unreasonable. Further, we suggest that governments should accept more responsibility for managing non-domestic grazing pressure. The concept of duty of care to land management provides a means by which a more appropriate division of responsibilities between landholders and government could be achieved to ensure that valued attributes of this iconic Australian landscape are retained.