{"created":"2023-06-20T13:24:18.969551+00:00","id":5742,"links":{},"metadata":{"_buckets":{"deposit":"1d0d663e-aadb-4c62-80d5-603eb4cea7d7"},"_deposit":{"created_by":24,"id":"5742","owners":[24],"pid":{"revision_id":0,"type":"depid","value":"5742"},"status":"published"},"_oai":{"id":"oai:ir.soken.ac.jp:00005742","sets":["33:34"]},"author_link":["10393","10394"],"item_2_creator_3":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"OHTSUKI, Hisashi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"10394","nameIdentifierScheme":"WEKO"}]}]},"item_2_date_4":{"attribute_name":"発行日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2017-06-23","subitem_date_issued_type":"Created"}]},"item_2_description_13":{"attribute_name":"研究課題番号","attribute_value_mlt":[{"subitem_description":"26840143","subitem_description_type":"Other"}]},"item_2_description_14":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_2_description_16":{"attribute_name":"研究期間","attribute_value_mlt":[{"subitem_description":"2014～2016","subitem_description_type":"Other"}]},"item_2_description_17":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"生物多様性は生態学の大きな課題であり、多様性の維持機構の解明は急務である。従来の「中立モデル」は移入と局所的絶滅のバランスが多様性を決定すると説明するが、そこでは種内競争や種間の競争・被食捕食・共生関係は過小評価されていた。そこで種内・種間の競争を第３の要因として陽に取り入れた理論モデルを開発し、多様性維持に果たす役割を探った。その結果、共生や競争は少数の優占種と多数の希少種を生み、被食捕食関係は中間種を多数生み出すことを見出した。また「中立」群集からのズレは、単なる種の総数ではなく、頻度で重み付けして算出した多様性指数を用いると検出できることを発見した。\n研究成果の概要(英文):Biodiversity is an important issue in ecology, and the mechanism of its maintenance needs to be clarified. A previous “neutral model”\nof biodiversity paid particular attention to the balance between immigration and local extinction to explain the diversity, while the role of intra specific effects have been underrepresented. I have developed a new theoretical model that incorporates those effects as the third factor to reveal their role in maintenance of biodiversity. I have found that mutualism and competition produce a few dominant species and many rare ones, and that prey-predator relations produce many intermediate ones. I also found that the deviation from neutrality is detected effectively by the species-frequency-weighted measures of biodiversity, not by the bare total number of species. \n","subitem_description_type":"Abstract"}]},"item_2_description_18":{"attribute_name":"科研費研究者番号","attribute_value_mlt":[{"subitem_description":"50517802 | https://nrid.nii.ac.jp/nrid/1000050517802/","subitem_description_type":"Other"}]},"item_2_description_6":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"科学研究費補助金研究成果報告書\n研究代表者:大槻久[総合研究大学院大学先導科学研究科講師]","subitem_description_type":"Other"}]},"item_2_relation_11":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"KAKEN（科学研究費データーベース）"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://kaken.nii.ac.jp/search/?kw=%E7%A8%AE%E5%86%85%E5%8A%B9%E6%9E%9C%E3%82%84%E7%A8%AE%E9%96%93%E7%9B%B8%E4%BA%92%E4%BD%9C%E7%94%A8%E3%82%92%E5%8F%96%E3%82%8A%E5%85%A5%E3%82%8C%E3%81%9F%E7%94%9F%E7%89%A9%E5%A4%9A%E6%A7%98%E6%80%A7%E7%90%86%E8%AB%96%E3%81%AE%E6%A7%8B%E7%AF%89","subitem_relation_type_select":"URI"}}]},"item_2_text_19":{"attribute_name":"研究分野","attribute_value_mlt":[{"subitem_text_value":"生態・環境 "}]},"item_2_text_20":{"attribute_name":"研究種目","attribute_value_mlt":[{"subitem_text_value":"若手研究(B) "}]},"item_2_text_5":{"attribute_name":"報告年度","attribute_value_mlt":[{"subitem_text_value":"2016"}]},"item_2_version_type_12":{"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":"大槻, 久"}],"nameIdentifiers":[{"nameIdentifier":"10393","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-05-28"}],"displaytype":"simple","filename":"26840143seika_ohtsuki.pdf","filesize":[{"value":"182.6 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"研究成果報告書","url":"https://ir.soken.ac.jp/record/5742/files/26840143seika_ohtsuki.pdf"},"version_id":"9b835726-d0f5-4d81-a0de-c51fe8c3a589"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"生物多様性","subitem_subject_scheme":"Other"},{"subitem_subject":"理論モデル","subitem_subject_scheme":"Other"},{"subitem_subject":"共生","subitem_subject_scheme":"Other"},{"subitem_subject":"被食捕食","subitem_subject_scheme":"Other"},{"subitem_subject":"競争","subitem_subject_scheme":"Other"},{"subitem_subject":"中立モデル","subitem_subject_scheme":"Other"},{"subitem_subject":"群集の中立説","subitem_subject_scheme":"Other"},{"subitem_subject":"シミュレーション","subitem_subject_scheme":"Other"},{"subitem_subject":"ランダム群集モデル","subitem_subject_scheme":"Other"},{"subitem_subject":"進化ゲーム理論","subitem_subject_scheme":"Other"},{"subitem_subject":"検定","subitem_subject_scheme":"Other"},{"subitem_subject":"中立説","subitem_subject_scheme":"Other"},{"subitem_subject":"群集生態学","subitem_subject_scheme":"Other"},{"subitem_subject":"負の密度依存","subitem_subject_scheme":"Other"},{"subitem_subject":"負の頻度依存","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":"research report","resourceuri":"http://purl.org/coar/resource_type/c_18ws"}]},"item_title":"種内効果や種間相互作用を取り入れた生物多様性理論の構築","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"種内効果や種間相互作用を取り入れた生物多様性理論の構築"},{"subitem_title":"A biodiversity theory incorporating intra- and inter specific effects","subitem_title_language":"en"}]},"item_type_id":"2","owner":"24","path":["34"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-05-28"},"publish_date":"2018-05-28","publish_status":"0","recid":"5742","relation_version_is_last":true,"title":["種内効果や種間相互作用を取り入れた生物多様性理論の構築"],"weko_creator_id":"24","weko_shared_id":-1},"updated":"2023-06-20T14:35:47.453060+00:00"}