Long-Term Investigation of Spatio-Temporal Variations in Faunal Composition and Species Richness of Megabenthos in Ise Bay, Central Japan
Source: Journal of Oceanography, Volume 60, Number 6, November 2004 , pp. 1071-1083(13)
Abstract:Based on our long-term data from megabenthos sampling from 1993 to 2002 in Ise Bay, central Japan, we examined spatio-temporal variations in taxon composition, species richness and its distribution of megabenthos in the bay in relation to the occurrence of the oxygen-poor water (i.e. oxygen content less than 3 ppm) in bottom waters of the bay. A total of 261 species were identified including 6 cnidarians, 1 tentaculate, 5 annelids, 71 molluscs, 72 crustaceans, 16 echinoderms, 12 urochordates and 78 pisces. Of the most abundant 10 megabenthos species, the following 4 species of echinoderms made up more than the half of megabenthos biomass: Luidia quinaria, Echinocardium cordatum, Asterias amurensis and Astropecten scoparius. Species richness of megabenthos varied significantly between seasons and among stations. The severity and period of occurrence of the oxygen-poor water developing every summer play an important role in determining spatial distributions of species richness in the bay.
Document Type: Research Article
Affiliations: 1: Faculty of Bioresources, Mie University, 1515 Kamihama-cho, Tsu, Mie, 514-8507, Japan, 2: Faculty of Bioresources, Mie University, 1515 Kamihama-cho, Tsu, Mie, 514-8507, Japan, Email: email@example.com
Publication date: November 1, 2004