Possibility of direct utilization of seagrass and algae as main food resources by small gastropod, Lacuna decorata, in a subarctic lagoon, Hichirippu, eastern Hokkaido, Japan with stable isotope evidences of carbon and nitrogen
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- Kajihara Rumiko
- Graduate School of Environmental Science, Hokkaido University
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- Komorita Tomohiro
- Graduate School of Environmental Science, Hokkaido University Faculty of Environmental and Symbiotic Science, Prefectural University of Kumamoto
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- Hamada Akemi
- Graduate School of Environmental Science, Hokkaido University
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- Shibanuma Seiichiro
- Graduate School of Environmental Science, Hokkaido University
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- Yamada Toshiro
- Nishimura-gumi Co. Ltd.
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- Montani Shigeru
- Graduate School of Environmental Science, Hokkaido University
書誌事項
- タイトル別名
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- Possibility of direct utilization of seagrass and algae as main food resources by small gastropod, <i>Lacuna decorata</i>, in a subarctic lagoon, Hichirippu, eastern Hokkaido, Japan with stable isotope evidences of carbon and nitrogen
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抄録
The small gastropod, Lacuna decorata Adams, living on macrophytobenthos or surface sediment, is one of the most dominant species of macrozoobenthos in Hichirippu lagoon covered with seagrass and macroalgae, eastern Hokkaido, Japan. We measured the standing stocks of primary producers and macrozoobenthos, and determined the stable carbon and nitrogen isotope ratios of the primary producers and L. decorata. With these results, we identify the main food items for L. decorata and discuss the feeding strategy of the small gastropod. This gastropod occupied about 64% in density and about 25% in biomass of the macrozoobenthos at all six sampling stations in the lagoon. It occurred densely on the surface of the sediment with dense patches of benthic microalgae (BMA), which contained extremely high levels of Chl.-a between 84 to 226 mg m−2 throughout the period of this study. Nevertheless, the stable isotope signatures of carbon and nitrogen of this gastropod clearly show the direct utilization of organic matter derived from seagrass, Zostera japonica, in the areas where the seagrass luxuriated. However, it shows also a flexible feeding strategy in food preference. It fed green algae such as Ulva pertusa and Urospora wormskioldii in the areas where the seagrass grew scarcely.
収録刊行物
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- Plankton and Benthos Research
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Plankton and Benthos Research 5 (3), 90-97, 2010
日本プランクトン学会、日本ベントス学会
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詳細情報 詳細情報について
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- CRID
- 1390001205263592576
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- NII論文ID
- 10026642903
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- NII書誌ID
- AA12130745
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- DOI
- 10.3800/pbr.5.90
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- ISSN
- 1882627X
- 18808247
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- HANDLE
- 2115/67174
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- NDL書誌ID
- 10799292
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可