{"@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/1362825895457299968.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/s0048-9697(99)00087-x"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S004896979900087X?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S004896979900087X?httpAccept=text/plain"}},{"identifier":{"@type":"PMID","@value":"11213194"}},{"identifier":{"@type":"NAID","@value":"30006299486"}}],"dc:title":[{"@value":"Eutrophication process recorded in dinoflagellate cyst assemblages — a case of Yokohama Port, Tokyo Bay, Japan"}],"description":[{"notation":[{"@value":"To investigate temporal changes of water quality, a role of dinoflagellate cysts preserved in surface sediments was examined in Yokohama Port in Tokyo Bay, Japan. Two cores were collected, and sedimentation rates and ages of both were dated as approximately 1900 years or slightly older on the basis of 210Pb and 137Cs concentrations. The temporal change in dinoflagellate cyst assemblages in the two cores reflects eutrophication in Yokohama Port in the 1960s. Abrupt increases in the cysts of Gyrodinium instriatum cysts strongly suggests that a red tide was caused by this species around 1985. Dinoflagellate cyst assemblages in surface sediments appear to be good biomarkers of changes in the water quality of enclosed seas."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382825895457299968","@type":"Researcher","foaf:name":[{"@value":"Kazumi Matsuoka"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00489697"},{"@type":"NCID","@value":"AA00836666"}],"prism:publicationName":[{"@value":"Science of The Total Environment"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"1999-06","prism:volume":"231","prism:number":"1","prism:startingPage":"17","prism:endingPage":"35"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","https://www.elsevier.com/legal/tdmrep-license"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S004896979900087X?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S004896979900087X?httpAccept=text/plain"}],"createdAt":"2002-07-25","modifiedAt":"2025-09-24","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Geologic%20Sediments","dc:title":"Geologic Sediments"},{"@id":"https://cir.nii.ac.jp/all?q=Time%20Factors","dc:title":"Time Factors"},{"@id":"https://cir.nii.ac.jp/all?q=Water","dc:title":"Water"},{"@id":"https://cir.nii.ac.jp/all?q=Japan","dc:title":"Japan"},{"@id":"https://cir.nii.ac.jp/all?q=Dinoflagellida","dc:title":"Dinoflagellida"},{"@id":"https://cir.nii.ac.jp/all?q=Animals","dc:title":"Animals"},{"@id":"https://cir.nii.ac.jp/all?q=Environmental%20Monitoring","dc:title":"Environmental Monitoring"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004232353741184","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Reconstruction of historical nutrient levels in Korean and Japanese coastal areas based on dinoflagellate cyst assemblages"}]},{"@id":"https://cir.nii.ac.jp/crid/1360013198818522624","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Marine Environmental Change Induced by Anthropogenic Activities – From a Viewpoint of Aquatic 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