Local interactions among ecological agents can give rise to regular spatial patterning across a large spatial extent, such as in the case of sand dunes, regular patterned vegetation (e.g., in tiger stripes, labyrinth, spots) in semi-arid ecosystems, and fairy circles in Namibia and Australia). In South Florida, wetlands form various types of regular patterning: regularly patterned ridge-slough patterning, tree islands, evenly-spaced cypress domes, and stringed cypress depressions on near-surface limestone bedrock.