zone, fringe, region, zones, species, communities, habitats, sediments, shelf, algae, ecology, fauna, survey, environment, areas, community, belt, platform, area, vegetation, depths, gastropods, rock, regions, bottom, sand, ecosystems, platforms, forest, population, deposits, environments, organisms, animals, populations, muds, meiofauna, zonation, gammaridea, biotopes, bottoms, flora, habitat, beds, rocks, waters, sands, macrofauna, division, sandstones, forests, greensand, substrates, reef, macrobenthos, decay, boulders, mud, gravel, snails, microphytobenthos, invertebrates, seaweeds, crabs, benthos, reefs, lithification, macroalgae, plant, infauna, sampling, origin, sandbank, enclosures, amphipods, alga

shallow, upper, lower, inner, outer, rocky, intertidal, immediate, deep, deeper, mediterranean, scandinavian, uppermost