{"created":"2024-03-18T04:33:29.731366+00:00","id":2001505,"links":{},"metadata":{"_buckets":{"deposit":"5be37c35-912b-4613-810a-da98975e83fe"},"_deposit":{"created_by":10,"id":"2001505","owner":"8","owners":[10],"pid":{"revision_id":0,"type":"depid","value":"2001505"},"status":"published"},"_oai":{"id":"oai:fra.repo.nii.ac.jp:02001505","sets":["15"]},"author_link":["420","407","677","2599","463","1013","1060","716","771"],"control_number":"2001505","item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2023-09-15","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"105114","bibliographicVolumeNumber":"267","bibliographic_titles":[{"bibliographic_title":"Continental Shelf Research","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Unprecedented, large-scale harmful algal blooms (HABs) occurred in Pacific coastal shelf waters off the southeastern coast of Hokkaido, Japan, in the autumn of 2021. To understand how these HABs, composed primarily of Karenia selliformis, changed the structures of lower-trophic-level ecosystems in shelf waters, we analyzed high-resolution in situ ship measurements taken during October 2015–2021. We mainly compared physico-biochemical variables averaged over the shelf in 2021 and in 2015–2020. Chlorophyll-a concentrations at a depth of 10 m were approximately 2.3-fold higher in 2021 than in 2015–2020. Chlorophyll-a concentrations were highest at the sea surface in 2021, and vertically integrated concentrations were 1.8-fold higher in 2021 than in 2015–2020. Silicate concentrations at a depth of 10 m were higher in 2021, whereas nitrate and phosphate concentrations were largely the same. Abundances of major diatoms and picophytoplankton (e.g., Synechococcus spp.) at a depth of 10 m declined by 2 orders and 1 order of magnitude in 2021, respectively, whereas Karenia spp. abundance greatly increased. These results indicated that outbreaks of K. selliformis suppressed the growth of other algal species and dramatically changed nutrient flows and balances in the coastal shelf ecosystem. The suppression of non-Karenia algal species might have occurred through interspecific competition for nutrients as well as allelopathy and/or mixotrophy by K. selliformis.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier","subitem_publisher_language":"en"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1016/j.csr.2023.105114","subitem_relation_type_select":"DOI"}}]},"item_10001_relation_16":{"attribute_name":"情報源","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_language":"ja","subitem_relation_name_text":"水産資源研究所　水産資源研究センター　海洋環境部"}],"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"23235005","subitem_relation_type_select":"Local"}}]},"item_10001_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_language":"en","subitem_relation_name_text":"Elsevier : Continental Shelf Research"}],"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"https://www.sciencedirect.com/science/article/pii/S0278434323001917","subitem_relation_type_select":"URI"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0278-4343","subitem_source_identifier_type":"PISSN"}]},"item_10001_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":"0000000494425826","affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"https://isni.org/isni/0000000494425826"}],"affiliationNames":[{"affiliationName":"Japan Fisheries Research and Education 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southeast Hokkaido, Japan","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"10","path":["15"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-03-18"},"publish_date":"2024-03-18","publish_status":"0","recid":"2001505","relation_version_is_last":true,"title":["Drastic changes in a lower-trophic-level ecosystem attributed to unprecedented harmful algal outbreaks in 2021 on the Pacific shelf off southeast Hokkaido, Japan"],"weko_creator_id":"10","weko_shared_id":-1},"updated":"2025-01-28T06:09:46.064993+00:00"}