{"created":"2023-07-27T04:42:48.367782+00:00","id":35195,"links":{},"metadata":{"_buckets":{"deposit":"fa247376-d195-4330-bd36-8192a2611f23"},"_deposit":{"created_by":3,"id":"35195","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"35195"},"status":"published"},"_oai":{"id":"oai:tohoku.repo.nii.ac.jp:00035195","sets":["86:192"]},"author_link":["81107","81113","81080","81092","81098","81093","81088","81102","81089","81081","81085","81108","81110","81095","81099","81074","81111","81112","81105","81115","81109","81076","81078","81106","81083","81104","81094","81114","81086","81079","81103","81119","81084","81082","81117","81075","81118","81090","81091","81097","81116","81077","81087","81120","81096","81100","81101"],"item_2_alternative_title_20":{"attribute_name":"その他の言語のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Stream water chemistry of university forests over Japan"}]},"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2000","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"3","bibliographicPageEnd":"312","bibliographicPageStart":"308","bibliographicVolumeNumber":"82","bibliographic_titles":[{"bibliographic_title":"日本林學會誌"}]}]},"item_2_date_62":{"attribute_name":"登録日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2010-04-21","subitem_date_issued_type":"Created"}]},"item_2_date_63":{"attribute_name":"公開日（投稿完了日）","attribute_value_mlt":[{"subitem_date_issued_datetime":"2010-04-21","subitem_date_issued_type":"Created"}]},"item_2_date_65":{"attribute_name":"発行日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2000","subitem_date_issued_type":"Created"}]},"item_2_date_80":{"attribute_name":"更新日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2010-04-21","subitem_date_issued_type":"Created"}]},"item_2_description_15":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"森林地域における渓流水質の広域比較は, 環境変化による森林生態系への影響把握に重要な情報となる。全国大学演習林において,1998年6月の1カ月間, 渓流水の水質調査を実施した。調査した渓流数は45カ所である。pHは, 平均で7.1 (最大8.1,最小6.1) とほぼ中性であった。電気伝導度 (EC) は, 平均で64 (最大178, 最小19) μS/cmであり, 沖縄•佐渡という島部で海塩のためECが大きかった。島部を除いたECは, pH, 陽イオンの当量合計およびアルカリ度 (主にHCO3-) と正の相関がみられた。これは, 炭酸風化による陽イオンの放出の多い渓流ではECが大きく, プロトン (H+) を消費するためpHも高いことを示唆している。NO3-濃度は, 関東山地の調査渓流で高かった。群馬県の調査渓流では, NO3-とCa2+濃度に強い正の相関がみられ, 土壌の表層において硝化作用で生成したH+による交換性Ca2+の溶出が示唆された。","subitem_description_type":"Abstract"},{"subitem_description":"Extensive research on forest stream water chemistry gives important information in understanding the effects of environmental changes in forest ecosystems. The chemical properties of stream water from 45 forested watersheds in university forests over Japan were investigated in June, 1998. The average pH was 7.1 (maximum 8.1, minimum 6.1). The average electric conductivity (EC) was 64 (maximum 178, minimum 19) μS/cm. The EC of stream water in Okinawa and Sado Island sites tended to be high because the effects of sea salt. Except for the island sites, EC had a positive correlation with pH, summation of cation and alkalinity (mostly HCO3-). This suggests that the water showed a high EC value and a high pH value caused by the consumption of proton (H+) in streams where carbonate weathering brings a high cation concentration. The NO3- concentration in the Kanto mountainous region sites was high compared with the concentration of other sites. In Gunma sites, the relationships between NO3- and Ca2+ concentration had a close positive correlation. It was considered that exchangeable Ca2+ in the surface soil was discharged due to the increase of H+ produced by nitrification.","subitem_description_type":"Abstract"}]},"item_2_description_41":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"subitem_description":"学術論文 (Article)","subitem_description_type":"Other"}]},"item_2_description_66":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"592090 bytes","subitem_description_type":"Other"}]},"item_2_publisher_34":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本森林学会"}]},"item_2_radio_69":{"attribute_name":"公開範囲","attribute_value_mlt":[{"subitem_radio_item":"学外"}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"日本森林学会 / 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watershed","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"proton","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"stream water","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"university forest","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"water chemistry","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal 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