Changes in precipitation patterns can have a significant impact on desert ecosystems. When there is a decrease in precipitation, it can lead to drought conditions, which can cause plants to wither and die, disrupting the entire food chain in the ecosystem. This can result in a decline in biodiversity as many species struggle to survive in the harsh conditions. On the other hand, an increase in precipitation can lead to flash floods and soil erosion, which can also have negative effects on desert plants and animals. Overall, changes in precipitation patterns can disrupt the delicate balance of desert ecosystems and threaten the survival of many species that are adapted to arid conditions.