Animals contribute to nutrient cycling in ecosystems in several ways. They play a key role in the decomposition process by breaking down organic matter and releasing nutrients back into the soil. Animals also help in nutrient dispersal through activities like feeding, defecating, and moving nutrients to different parts of the ecosystem. Additionally, animals can alter the physical and chemical properties of the soil through their burrowing, feeding, and other activities, which can further enhance nutrient cycling processes. Overall, animals are essential components of ecosystem nutrient cycling and play a crucial role in maintaining ecosystem health and productivity.