Utilization of Photosynthetically Produced Organic Particles by Dense Patches of Suspension Feeding Bivalves on the Sand Flat of Midori River Estuary, Kyushu, Japan
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- Yamaguchi Hitomi
- Graduate School of Fisheries Sciences, Hokkaido University
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- Tsutsumi Hiroaki
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
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- Tsukuda Masanori
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
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- Nagata Sayaka
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
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- Kimura Chizuko
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
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- Yoshioka Miho
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
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- Shibanuma Seiichiro
- CBEC Co., Ltd
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- Montani Shigeru
- Graduate School of Fisheries Sciences, Hokkaido University
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Description
Abstract: Midori River estuary faces Ariake Bay, and has the largest sandy tidal flat(approximately 2, 100 ha)in Japan. We investigated the spatial distribution of particle size composition of the sediment, microphytobenthos on the surface sediment and macrobenthic animals at the stations set along a cross transect line in Midori River estuary. The Chl-a concentrations of the surface sediment that reflected the biomass of the microphytobenthos ranged between 19.3 and 113 mg/m2 at the stations on the tidal flat, and tended to decrease from the upper part to the lower part of the tidal flat and the offshore area. However, 92.0%of the total biomass of the macrobenthic animals collected at the sampling stations on the tidal flat was concentrated at the stations on the middle to lower part of the tidal flat. The highest biomass reached 3, 760g WW/m2, mainly due to the occurrence of dense patches of two suspension feeding bivalves, Ruditapes philippinarum and Mactra veneriformis. These two bivalves alone occupied 93.2%of the biomass of all the benthic animals collected at all sampling stations. The consumption of the primarily produced organic matter estimated from the secondary production of only a single species of Ruditapes apparently exceeded the potential primary production at the same place. The results of this study suggest that the re-suspension of primarily produced organic particles by the microphytobenthos on“ the upper part” of the tidal flat and its lateral transportation to“ the middle to lower part” of the tidal flat is essential to sustain the high secondary production of the suspension feeding benthic bivalves on the middle to lower part of this tidal flat.
Journal
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- BENTHOS RESEARCH
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BENTHOS RESEARCH 59 (2), 67-77, 2004
JAPANESE ASSOCIATION OF BENTHOLOGY
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Details 詳細情報について
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- CRID
- 1390282680457861376
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- NII Article ID
- 130004997579
- 10016213544
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- NII Book ID
- AN10565057
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- ISSN
- 18838901
- 02894548
- http://id.crossref.org/issn/02894548
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- NDL BIB ID
- 7258234
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed