{"created":"2023-05-15T16:49:02.436238+00:00","id":26310,"links":{},"metadata":{"_buckets":{"deposit":"b8242813-3b11-4e38-b974-1af36d9d9ccb"},"_deposit":{"created_by":6,"id":"26310","owners":[6],"pid":{"revision_id":0,"type":"depid","value":"26310"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00026310","sets":["6:7"]},"author_link":["117055","117057","117056","117058"],"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2021-01-28","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageStart":"2598　","bibliographicVolumeNumber":"11","bibliographic_titles":[{"bibliographic_title":"Scientific Reports"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Nitrate pollution in groundwater is a serious problem in many parts of the world. However, due to the diffuse and common spatially over-lapping character of potential several non-point pollution sources, it is often difficult to distinguish main nitrate sources responsible for the pollution. For this purpose, we present a novel methodology applied to groundwater for an intensely polluted area. Groundwater samples were collected monthly from April 2017 to March 2018 in Shimabara City, Nagasaki, Japan. Soil samples were collected seasonally at soil surface and 50 cm depth at 10 locations during the same period. Sequential extraction by water and extract agents was performed using calcium phosphate for anions and strontium chloride for cations. Mean nitrate concentration in groundwater close to a livestock waste disposal site (hereinafter called “LWDS”) was 14.2 mg L−1, which is exceeding Japanese drinking water standards (10 mg L−1). We used coprostanol concentration, which is a fecal pollution indicator, to identify pollution sources related to livestock waste. For this purpose, we measured coprostanol (5β) and cholestanol (5α) and then calculated the sterol ratio (5β/(5β + 5α)). The ratios for three groundwater sampling sites were 0.28, 0.26, and 0.10, respectively. The sterol ratios indicated no pollution (< 0.3). However, the detection of coprostanol originating from animal and human waste showed that groundwater was clearly affected by this pollution source. Nitrate levels in the soil were relatively high in samples collected close to the LWDS and coprostanol contents were affected by livestock waste. Soil and groundwater nitrate concentrations displayed a complex but strong relationship. Nitrate contents were shown to be transported downstream from source areas in both soil and groundwater. ","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"Scientific Reports, 11(1), art.no.2598; 2021","subitem_description_type":"Other"}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Springer Nature"}]},"item_2_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1038/s41598-021-82188-2","subitem_relation_type_select":"DOI"}}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© The Author(s) 2021. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/."}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2045-2322","subitem_source_identifier_type":"ISSN"}]},"item_2_version_type_16":{"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":[{"creatorNames":[{"creatorName":"Nakagawa, Kei"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Amano, Hiroki"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Persson, Magnus"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Berndtsson, Ronny"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2021-02-17"}],"displaytype":"detail","filename":"SciRep11_2598.pdf","filesize":[{"value":"5.5 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"SciRep11_2598.pdf ","url":"https://nagasaki-u.repo.nii.ac.jp/record/26310/files/SciRep11_2598.pdf"},"version_id":"3f006ae7-e69c-4a08-bf9b-460b1d025d05"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Spatiotemporal variation of nitrate concentrations in soil and groundwater of an intensely polluted agricultural area","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Spatiotemporal variation of nitrate concentrations in soil and groundwater of an intensely polluted agricultural area"}]},"item_type_id":"2","owner":"6","path":["7"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-02-17"},"publish_date":"2021-02-17","publish_status":"0","recid":"26310","relation_version_is_last":true,"title":["Spatiotemporal variation of nitrate concentrations in soil and groundwater of an intensely polluted agricultural area"],"weko_creator_id":"6","weko_shared_id":-1},"updated":"2023-05-15T20:33:17.353436+00:00"}