Assessing both ecological and engineering resilience of a steppe agroecosystem using the viability theory

摘要: Abstract The high dependence of rangeland-based livestock farming systems to environmental uncertainty makes the resilience these as important production. Quantification is however difficult conduct in real due their low reproducibility. In this study, we develop a modeling approach quantify both engineering (return time after perturbation) and ecological (magnitude perturbation that system can bear) mixed herd Mongolian steppes. model, build within framework viability theory, captures dynamics its management. has particularity be impacted by agro-climatic events called dzuds induce massive mortalities when harsh climatic condition stocking densities are met. Results show (i) non-linearly depends on composition level underground biomass system, (ii) contrasted management strategies may followed cope with risk dzud (iii) according most herders area absorb climate shocks unless they compete for forage other herders. discussed regarding impact resource sharing grazing systems.