Note
The influence of macrophyte biomass and species composition on the distribution of macrobenthic crustaceans was examined in 2 vegetated and 2 unveqetated grass bed microhabitats under similar physical-chemical conditions. Vegetated habitats consistently supported higher numbers of individuals and species than either of the unvegetated zones. Correlations between plant biomass in each microhabitat and both animal numbers and diversity suggested that seagrass biomass was a key organizing factor in macrophyte-associated faunal assemblages.