Dispersion where individuals aggregate in patches is:
Clumped dispersion occurs when individuals are concentrated in groups or habitat patches rather than spaced independently or evenly. It is the most common broad pattern in nature because resources such as water, nutrients, shelters, hosts, or breeding sites are often spatially heterogeneous. Limited dispersal can keep offspring near parents, and social processes such as flocking, schooling, colony formation, or cooperative defense can further promote aggregation. In quadrat data, clumping typically produces variance greater than the mean: many units contain few or no individuals, while a small
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 9
