The grassland ecosystems in the Yellow River Source Zone are crucial for protecting the environment in China. The researchers studied the degradation of grasslands in this area, focusing on the impact of grazing and climate change. They found that small mammals play a significant role in grassland degradation. By analyzing field data and modeling work, they identified different states of grassland degradation and restoration. The study suggests management programs to restore degraded grasslands in the region, which could help in sustainable development strategies.