抄録
An inventory of the macrobenthic invertebrate fauna of the temperate tidal flats on southern Izu Peninsula, Pacific coast of Japan is presented. Surveys conducted during from 2014 to 2018 in the Aono and Ogamo River mouths. A total of 74 macrobenthic taxa, including 24 endangered species were recorded in these areas of diverse intertidal habitats including bare tidal flats, salt marshes and semi-mangrove Hibiscus hamabo. The faunal diversity and number of endangered species were comparable to those reported from adjacent regions (e.g., Tokyo Bay and southern Fukushima Prefecture), with 15 of the endangered species specific to the southwest Pacific Japanese coast, suggesting that these populations were nearly their northeastern distribution limits. New records for the gastropod Cerithium coralium and bivalve Isognomon ephippium on southern Izu Peninsula represented the northeastern distribution limits of both species. The inventory will serve as a faunal reference for conservation of biodiversity in the study areas, and aid future monitoring under any environmental changes occurred in the region.
