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• W2011766818 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 304:101-116 (2005) - doi:10.3354/meps304101 Isotopic evidence for phytoplankton as amajor food source for macrobenthos on an intertidal sandflat in Ariake Sound, Japan Hisashi Yokoyama1,*, Akio Tamaki2, Kazuki Koyama2, Yuka Ishihi1, Katsumasa Shimoda2, Kazuyuki Harada2 1National Research Institute of Aquaculture, Fisheries Research Agency, Nansei, Mie 516-0193, Japan2Faculty of Fisheries, Nagasaki University, Bunkyo-Machi 1–14, Nagasaki 851-8521, Japan *Email: hyoko@fra.affrc.go.jp ABSTRACT: To delineate a soft-shore trophic structure, macrobenthos was collected from an intertidal sandflat at the mouth of the Shirakawa River in the central part of Ariake Sound, Kyushu, Japan, on 3 occasions in 2003 (January, March, and June to July during the rainy season), and the isotopic compositions of animals and their potential food sources were analyzed. Food sources of animals were assessed based on the diet–tissue isotopic fractionation (δ13C = 0.6 to 2.0‰, δ15N = 3.4 to 3.9‰) of 3 main constituent species (the bivalves Mactra veneriformis and Ruditapes philippinarum and the ghost shrimp Nihonotrypaea japonica), which had been determined by an earlier laboratory experiment. The results revealed that (1) consumers were classified into 3 groups; a group consisting of 51 species including 4 main species (the above-mentioned species and the mud shrimp Upogebia major) that derived nutrition mainly from coastal phytoplankton, one consisting of 7 species that incorporated more 13C-enriched material (e.g. benthic microalgae) and a group consisting of 4 species that incorporated more 13C-reduced material (e.g. riverine organic matter); (2) the phytoplankton-based trophic structure was composed of 3 trophic levels; (3) M. veneriformis juveniles collected during the rainy season appeared to incorporate riverine organic matter; and (4) reeds from the flood plain, detrital terrestrial plant material, sewage effluents and seaweeds were not food sources for most consumers. We concluded that the high phytoplankton biomass and scarcity of benthic microalgae on this sandflat account for its phytoplankton-based trophic structure. KEY WORDS: Stable isotopes · Estuary · Intertidal sandflat · Trophic structure · Phytoplankton · Benthic microalgae Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 304. Online publication date: December 08, 2005 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2005 Inter-Research." @default.
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• W2011766818 title "Isotopic evidence for phytoplankton as a major food source for macrobenthos on an intertidal sandflat in Ariake Sound, Japan" @default.
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