• Relations of Lloyd's I p macrobenthic patchiness studied in 6 types seagrass. Interspecific closely correlated with unoccupancy. Less so abundance, and not mean crowding, c. correlates the expression ' a .unoccupancy + (1? ) c where > 0.8. Patchiness-unoccupancy relationship unaffected by assemblage composition. The macroecological abundance-occupancy is well known; potential one either or bo...