{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360865815689687680.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.3354/meps14503"}},{"identifier":{"@type":"URI","@value":"https://www.int-res.com/articles/meps2024/727/m727p081.pdf"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Amino acid nitrogen isotopic compositions show seep copepods gain nutrition from host animals"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Deep-sea chemosynthetic ecosystems harbour high biomass centred around animals with chemoautotrophic symbionts. Despite being intensively studied over the last 4 decades, microscopic animals associated with and/or parasitic on dominating holobionts remain understudied. Here, we combine bulk tissue isotope analysis for carbon and nitrogen and compound-specific isotope analysis of amino acids (CSIA-AA) for nitrogen to elucidate the relationship between 2 copepod-host pairs from the Off Hatsushima hydrothermal seep in Sagami Bay, Japan: the vesicomyid clam <jats:italic>Phreagena okutanii</jats:italic> and <jats:italic>Hyphalion sagamiense</jats:italic> living on its mantle, and the tubeworm <jats:italic>Lamellibrachia columna</jats:italic> and <jats:italic>Dirivultus kaiko</jats:italic> found on its plume. Bulk tissue isotope analyses found overall large variations in δ<jats:sup>13</jats:sup>C and δ<jats:sup>15</jats:sup>N values across both associations, and did not allow conclusions on the trophic relationship between each pair. In contrast, CSIA-AA for <jats:italic>Phreagen</jats:italic><jats:italic>a-</jats:italic><jats:italic>Hyphalion</jats:italic> clearly showed trophic positions (TP<jats:sub>Glu/Phe</jats:sub>) increasing from gill (symbiont) to adductor muscle (host tissue) to <jats:italic>H. sagamiense</jats:italic>. In the case of <jats:italic>Lamellibrachi</jats:italic><jats:italic>a-</jats:italic><jats:italic>Dirivultus</jats:italic>, a similar increase in TP<jats:sub>Glu/Phe</jats:sub> was found from the plume to <jats:italic>D. kaiko</jats:italic>. These results show that both <jats:italic>H. sagamiense</jats:italic> and <jats:italic>D. kaiko</jats:italic> are nutritionally dependent on their respective hosts and therefore should be considered parasites despite being from copepod families that are typically not recognised as parasitic. Our CSIA-AA results represent the first use of this technique to document host-parasite relationships in chemosynthetic ecosystems. Understanding the role of parasites is of great importance in reconstructing energy flow in ecosystems, and our results underscore the promising nature of CSIA-AA in revealing their otherwise hidden relationships.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380025430655204876","@type":"Researcher","foaf:name":[{"@value":"NF Ishikawa"}],"jpcoar:affiliationName":[{"@value":"Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380865815689687682","@type":"Researcher","foaf:name":[{"@value":"C Chen"}],"jpcoar:affiliationName":[{"@value":"X-STAR, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380865815689687685","@type":"Researcher","foaf:name":[{"@value":"R Hashimoto"}],"jpcoar:affiliationName":[{"@value":"Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380865815689687683","@type":"Researcher","foaf:name":[{"@value":"NO Ogawa"}],"jpcoar:affiliationName":[{"@value":"Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380865815689687681","@type":"Researcher","foaf:name":[{"@value":"D Uyeno"}],"jpcoar:affiliationName":[{"@value":"Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380865815689687680","@type":"Researcher","foaf:name":[{"@value":"H Nomaki"}],"jpcoar:affiliationName":[{"@value":"X-STAR, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01718630"},{"@type":"EISSN","@value":"16161599"}],"prism:publicationName":[{"@value":"Marine Ecology Progress Series"}],"dc:publisher":[{"@value":"Inter-Research Science Center"}],"prism:publicationDate":"2024-01-25","prism:volume":"727","prism:startingPage":"81","prism:endingPage":"90"},"reviewed":"false","dc:rights":["https://www.int-res.com/journals/terms-of-use/"],"url":[{"@id":"https://www.int-res.com/articles/meps2024/727/m727p081.pdf"}],"createdAt":"2023-12-19","modifiedAt":"2024-01-25","project":[{"@id":"https://cir.nii.ac.jp/crid/1040011231170956800","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"22K19857"},{"@type":"JGN","@value":"JP22K19857"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22K19857/"}],"notation":[{"@language":"ja","@value":"水をすくうだけでわかる革新的な生態系観測手法の確立"},{"@language":"en","@value":"Establishing a revolutionary method for ecosystem monitoring by scooping a cup of water"}]},{"@id":"https://cir.nii.ac.jp/crid/1040018274933173888","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"24K09575"},{"@type":"JGN","@value":"JP24K09575"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24K09575/"}],"notation":[{"@language":"ja","@value":"熱帯海域の寄生性カイアシ類-軟体動物を踏み台とした多様化仮説の検証"}]},{"@id":"https://cir.nii.ac.jp/crid/1040287907249052800","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"21H04784"},{"@type":"JGN","@value":"JP21H04784"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21H04784/"}],"notation":[{"@language":"ja","@value":"多元素同位体地図および個体履歴保存部位分析を用いた、移動履歴生態学の構築"},{"@language":"en","@value":"Development of migration history ecology using multi-isoscapes and analysis of tissues having an individual history"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050001335723719936","@type":"Article","resourceType":"学術雑誌論文(journal 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Sea"}]},{"@id":"https://cir.nii.ac.jp/crid/1362262945111097088","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Embracing variability in amino acid δ<sup>15</sup>N fractionation: mechanisms, implications, and applications for trophic ecology"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544418898348032","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"sFDvent: A global trait database for deep‐sea hydrothermal‐vent fauna"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825894511293824","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Variation in trophic shift for stable isotope ratios of carbon, nitrogen, and sulfur"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107369844676096","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Dirivultidae (Copepoda: Siphonostomatoida) from hydrothermal vent fields in the Okinawa Trough, North Pacific Ocean, with description of one 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