Individual study: Grazing Effects on Spring Ecosystem Vegetation of California's Hardwood Rangelands
Allen-Diaz B. & Jackson R.D. (2000) Grazing Effects on Spring Ecosystem Vegetation of California's Hardwood Rangelands. Journal of Range Management, 53, 215-220
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Other biodiversity: Use fewer grazers
A replicated, randomized controlled study in 1993–1997 in grasslands in northern California, USA, found no difference in the cover of herbaceous vegetation between plots that were lightly or moderately grazed by cattle, but cover was more stable in lightly grazed plots. Plants: Similar cover of herbaceous vegetation was found in lightly-grazed and moderately-grazed plots, but cover was more stable in lightly-grazed plots (along creeks: 46–47% vs 35–80% cover; by springs: data not provided). Methods: In November and February–April 1993–1997, three pastures in each of three areas had either light grazing or moderate grazing (three replicates of each). In spring, plants were monitored at springs and alongside creeks in each pasture. The area had been grazed at moderate intensity since 1960.
Other biodiversity: Exclude grazers
A replicated, randomized, controlled study in 1993–1997 in grasslands in northern California, USA, found that plant community composition changed and the cover of herbaceous vegetation was higher in ungrazed plots, compared to cattle-grazed plots. Plants: Herbaceous plant cover was higher in ungrazed plots, compared to grazed plots, along creeks for three of six years (84–87% vs 46–59% cover). There were no differences in cover for plots by springs (data not provided). The plant community changed significantly in one plot with moderate grazing intensity but not in ungrazed plots (data reported as eigenvalues). Methods: From 1993 to 1997, three pastures in each of three areas were ungrazed, lightly grazed, or moderately grazed (three replicates of each). Cattle were allowed on grazed pasture in November and February–April each year. Plants were monitored at springs and along creeks in each pasture, each spring. Before the study, the area had been moderately grazed since 1960.