Overgrazing causes

Overgrazing causes Soil erosion.
Overgrazing occurs when plants are exposed to intensive grazing for extended periods, or without sufficient recovery periods. It can be caused by either livestock in poorly managed agricultural applications, game reserves, or nature reserves.
Overgrazing reduces the usefulness, productivity and biodiversity of the land and is one cause of desertification and erosion. Overgrazing is also seen as a cause of the spread of invasive species of non-native plants and weeds.