The recent increase in native perennial grasses in some desertified shrublands suggests that climate variability may initiate state change reversals (Peters et al. 2012), and long-term data show that the key recovery processes differ by grass species (Peters et al. 2013). The infrequent nature of exogenous phenomena, such as El Niño, requires long-term manipulative experiments (Gherardi and Sala 2015).
Cross-scale interactions and recovery of grasses following shrub encroachment - Debra Peters, Jeffrey Herrick, Greg Okin, Mike Duniway, Enrique Vivoni, Osvaldo Sala, Kris Havstad, Curtis Monger, Jin Yao, John Anderson