{"created":"2021-03-01T06:43:17.487722+00:00","id":25340,"links":{},"metadata":{"_buckets":{"deposit":"a072e86b-a5ab-45c9-a997-959a83b7593c"},"_deposit":{"id":"25340","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25340"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00025340","sets":["27:2466:2467:2527","9:504:2469:2528"]},"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Dynamics of Population and Basal Area in a Mixed Forest with Coniferous and Broad-leaved Species : A Case Study of Large-scale and Long-term Observation Plot in the Tokyo University Forest in Hokkaido"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2002","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"20","bibliographicPageStart":"1","bibliographicVolumeNumber":"107","bibliographic_titles":[{"bibliographic_title":"東京大学農学部演習林報告"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"東京大学北海道演習林の針広混交林に設置された36.25haの大面積プロットにおける5年の間隔をおいた2回の胸高直径測定の結果から樹木の個体数と現存量の変動を解析した。個体数は針葉樹が増加し，広葉樹が減少し，全体では微増した。風害のギャップに展開していた広葉樹のうち陽樹が減少し，本数で上位を占めるトドマツやシナノキによる寡占化と北方林における優占樹種であるエゾマツの個体数減少の傾向が認められた。広葉樹の直径分布形においてL型分布が崩れ，針葉樹主体の林分に移行していることが示唆された。胸高断面積合計を現存量の指標に用いたところ，針葉樹・広葉樹ともに増加しており，5年間の純成長率は3％で，針葉樹が占める割合が64％であった。広葉樹の大径木は直径成長が低く，林分成長量の大きな部分を胸高直径40cm前後の針葉樹が占めていた。また，この評価方法では枝分かれの多い広葉樹大径木の現存量が過小評価される可能性が示された。","subitem_description_type":"Abstract"},{"subitem_description":"This paper analyzes the dynamics of basal area and population for five years in a large-scale permanent plot of mixed forest with coniferous and broad-leaved species of the Tokyo University Forest in Hokkaido. A complete enumeration of d.b.h. has practiced in 1993 and 1998. In population, conifer increased and broad-leaved tree decreased. Abies sachalinensis and Tilia japonica, which are dominant species, increased in population. On the other hand Picea jezoensis, which is another dominant species, decreased. This is a serious problem in boreal forest management. The diameter distribution of broad-leaved trees loses L-shape and the stand structure will be composed of mainly conifer. The basal area increased both in conifer and broad-leaved trees, and the net increment rate for five years is 3%, in which conifer occupies 64%. The most part of the basal area increment occupies large sized conifers, which are around 40 cm in d.b.h., and the growth rate of large sized broad-leaved trees is remarkably low.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"54170","nameIdentifierScheme":"WEKO"}],"names":[{"name":"YAMAMOTO, Hirokazu"}]},{"nameIdentifiers":[{"nameIdentifier":"54171","nameIdentifierScheme":"WEKO"}],"names":[{"name":"KAJI, Mikio"}]},{"nameIdentifiers":[{"nameIdentifier":"54172","nameIdentifierScheme":"WEKO"}],"names":[{"name":"SHIBANO, Shinsaku"}]},{"nameIdentifiers":[{"nameIdentifier":"54173","nameIdentifierScheme":"WEKO"}],"names":[{"name":"OKAMURA, Koji"}]},{"nameIdentifiers":[{"nameIdentifier":"54174","nameIdentifierScheme":"WEKO"}],"names":[{"name":"KASAHARA, Hisaomi"}]},{"nameIdentifiers":[{"nameIdentifier":"54175","nameIdentifierScheme":"WEKO"}],"names":[{"name":"MICHIGAMI, Akio"}]},{"nameIdentifiers":[{"nameIdentifier":"54176","nameIdentifierScheme":"WEKO"}],"names":[{"name":"HIROKAWA, Toshihide"}]}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学大学院農学生命科学研究科附属演習林"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162451","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03716007","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"610","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"The Tokyo University Forests"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学大学院農学生命科学研究科附属演習林千葉演習林"},{"subitem_text_value":"東京大学大学院新領域創成科学研究科環境学専攻"},{"subitem_text_value":"東京大学大学院農学生命科学研究科附属演習林北海道演習林"},{"subitem_text_value":"University Forest in Chiba, Graduate School of Agriculture and Life Science, The University of Tokyo"},{"subitem_text_value":"Department of Environmental studies, Graduate School of Frontier Sciences, The University of Tokyo"},{"subitem_text_value":"University Forest in Hokkaido, Graduate School of Agriculture and Life Science, The University of Tokyo"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"山本, 博一"}],"nameIdentifiers":[{"nameIdentifier":"54163","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"梶, 幹男"}],"nameIdentifiers":[{"nameIdentifier":"54164","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"芝野, 伸策"}],"nameIdentifiers":[{"nameIdentifier":"54165","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"岡村, 行治"}],"nameIdentifiers":[{"nameIdentifier":"54166","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"笠原, 久臣"}],"nameIdentifiers":[{"nameIdentifier":"54167","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"道上, 昭夫"}],"nameIdentifiers":[{"nameIdentifier":"54168","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"広川, 俊英"}],"nameIdentifiers":[{"nameIdentifier":"54169","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":"2017-06-09"}],"displaytype":"detail","filename":"esrh107001.pdf","filesize":[{"value":"1.2 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"esrh107001.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/25340/files/esrh107001.pdf"},"version_id":"dbcd7a13-d9d4-493c-a00b-71590282073b"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"針広混交林","subitem_subject_scheme":"Other"},{"subitem_subject":"胸高断面積","subitem_subject_scheme":"Other"},{"subitem_subject":"個体数","subitem_subject_scheme":"Other"},{"subitem_subject":"成長量分布","subitem_subject_scheme":"Other"},{"subitem_subject":"mixed forest with coniferous and broad-leaved species","subitem_subject_scheme":"Other"},{"subitem_subject":"Basal Area","subitem_subject_scheme":"Other"},{"subitem_subject":"Population","subitem_subject_scheme":"Other"},{"subitem_subject":"Increment distribution","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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"針広混交天然林における樹木の個体数と現存量の動態 : 北海道演習林前山保存林の事例","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"針広混交天然林における樹木の個体数と現存量の動態 : 北海道演習林前山保存林の事例"}]},"item_type_id":"4","owner":"1","path":["2528","2527"],"pubdate":{"attribute_name":"公開日","attribute_value":"2012-07-17"},"publish_date":"2012-07-17","publish_status":"0","recid":"25340","relation_version_is_last":true,"title":["針広混交天然林における樹木の個体数と現存量の動態 : 北海道演習林前山保存林の事例"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T04:03:38.709861+00:00"}