The primary impact of overgrazing on grassland ecosystems is the degradation of vegetation and soil quality. When livestock and wild herbivores graze excessively, they can remove too much plant cover, leading to soil erosion and a decrease in biodiversity. This disruption affects the ecosystem's ability to recover and can result in invasive species taking over. Overgrazing also reduces the land's capacity to store carbon, impacting climate regulation. Sustainable grazing practices are essential to maintain healthy grassland ecosystems and their ecological functions.