摘要 : 1. Spring-fed wetlands are nested within California's oak savanna-annual grassland, which is considered a non-equilibrium-type system because it shows little community-level response to changes in grazing intensity. This insensiti... 展开 1. Spring-fed wetlands are nested within California's oak savanna-annual grassland, which is considered a non-equilibrium-type system because it shows little community-level response to changes in grazing intensity. This insensitivity to disturbance is thought to result from transient resource limitation and the annual life cycle tending to swamp the effects of defoliation. Because spring-fed wetlands receive relatively consistent and high inputs of water and nutrients, and they are dominated by perennial herbaceous vegetation, we hypothesized that these systems would respond to a grazing intensity gradient in a predictable manner, i.e. equilibrium dynamics would prevail. 收起