{"_buckets": {"deposit": "e530e69d-6f48-4f44-8b0d-cdafbc5f5016"}, "_deposit": {"id": "11709", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "11709"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00011709", "sets": ["1243"]}, "item_9_alternative_title_19": {"attribute_name": "その他の言語のタイトル", "attribute_value_mlt": [{"subitem_alternative_title": "A palynological study of alas sediments, central Yakutia, eastern Siberia(Summaries of Researches Using AMS)"}]}, "item_9_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2003-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "140", "bibliographicPageStart": "130", "bibliographicVolumeNumber": "14", "bibliographic_titles": [{"bibliographic_title": "名古屋大学加速器質量分析計業績報告書"}]}]}, "item_9_description_4": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "A larges number of thermokarst depressions, i.e. alasses, are exists in Central Yakutia, eastern Siberia. Alasses were formed by thermal disturbance of ice complex in ground, for example, rising air temperature or destruction of vegetation. Once alas is formed, reforestation is difficult because of salt accumulation near ground surface. It is said that alasses in the Central Yakutia were developed during the Holocene Climatic Optimum. However, the chronology of alas formation and local vegetation change around alas are not well known. The reconstruction of alas formation history and past environmental changes around alas might be important for understanding climatic trends in future. Pollen analysis is useful for reconstruction of the past vegetation change. The objectives of this study are reconstruction of alas formation and vegetation history of central Yakutia by means of ^\u003c14\u003eC dating and pollen analysis. The study sites are four thermokarst lakes, Ulakhan Sykkhan alas (62° 08\u0027 57\" N, 130° 31\u0027 54\"E), Uinakh alas (62° 09\u0027 23\" N, 130° 38\u0027 35\"E), Ulumaaly alas and Lake Maralay (63° 06\u0027 43\" N, 130° 35\u0027 41\" E), middle terrace of right bank of the Lena River, central Yakutia. The vegetation in the Central Yakutia is boreal forest, where Larix dahurica with Pinus sylvestris is dominant. The border between forest and alas is occupied by Betula platyphylla. The vegetation of alas was dominant by Poaceae, Cyperaceae and Asteraceae etc. Samples from sediments were taken by shovel, and the deeper frost sediment was obtained with the boring machine. Each sample, which was divided into 1cm^3, was processed for pollen analysis according to standard methods. The sediments were subsampled at every 2 to 8cm intervals. At least 200 arboreal pollen grains were counted for each sample at 400× magnification, except for low concentrated sample. Relative frequency was calculated based on the arboreal pollen number. Surface pollen analysis was also conducted, to assist the understanding between vegetation and pollen assemblage relationships. The results of ^\u003c14\u003eC dating at initiation of alas sediments were indicate as 7,975±32, 8,285±33 and 8,453±33BP, which suggest that alasses in central Yakutia were developed around 8,000 BP. Surface pollen samples show that (1) Pinus and Picea pollen were transported by wind in long distance, (2) Larix and Betula pollen were reflected vegetation around alas, and (3) herb taxa indicate local presence of the source plants nearby. Vegetation reconstruction from four alas sediment shows that (1) Around 8,000BP the vegetation in the Central Yakutia is dominant of Betula-Larix forest with step elements such as Poaceae and Artemisia. (2) Between 8,000-5,000BP the maximum of Picea and Betula pollen were observed indicating the warm period. (3) Sharp increased Pinus pollen after 5,000BP indicates an expansion of Pinus sylvestris on sandy soils in the Central Yakutia.", "subitem_description_type": "Abstract"}]}, "item_9_description_5": {"attribute_name": "内容記述", "attribute_value_mlt": [{"subitem_description": "タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 2002 (平成14)年度", "subitem_description_type": "Other"}]}, "item_9_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.18999/sumrua.14.130", "subitem_identifier_reg_type": "JaLC"}]}, "item_9_publisher_32": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "名古屋大学年代測定資料研究センター"}]}, "item_9_relation_43": {"attribute_name": "異版である", "attribute_value_mlt": [{"subitem_relation_type": "isVersionOf", "subitem_relation_type_id": {"subitem_relation_type_id_text": "http://ci.nii.ac.jp/naid/110007150857/", "subitem_relation_type_select": "URI"}}]}, "item_9_rights_12": {"attribute_name": "権利", "attribute_value_mlt": [{"subitem_rights": "名古屋大学年代測定資料研究センター"}, {"subitem_rights": "本文データは学協会の許諾に基づきCiNiiから複製したものである"}]}, "item_9_select_15": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_9_text_14": {"attribute_name": "フォーマット", "attribute_value_mlt": [{"subitem_text_value": "application/pdf"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "片村, 文崇"}], "nameIdentifiers": [{"nameIdentifier": "81516", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "KATAMURA, Fumitaka"}], "nameIdentifiers": [{"nameIdentifier": "81517", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "福田, 正己"}], "nameIdentifiers": [{"nameIdentifier": "81518", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "FUKUDA, Masami"}], "nameIdentifiers": [{"nameIdentifier": "81519", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "中村, 俊夫"}], "nameIdentifiers": [{"nameIdentifier": "81520", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "NAKAMURA, Toshio"}], "nameIdentifiers": [{"nameIdentifier": "81521", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "森泉, 純"}], "nameIdentifiers": [{"nameIdentifier": "81522", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "MORIIZUMI, Jun"}], "nameIdentifiers": [{"nameIdentifier": "81523", "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": "2018-02-20"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "KJ00005461736.pdf", "filesize": [{"value": "904.2 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 904200.0, "url": {"label": "KJ00005461736.pdf", "url": "https://nagoya.repo.nii.ac.jp/record/11709/files/KJ00005461736.pdf"}, "version_id": "ab7ba4ea-890f-4c6c-9bcc-07f9c198a358"}]}, "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": "東シベリア、中央ヤクーチアにおけるアラス堆積物の花粉分析学的研究(タンデトロン加速器質量分析計業績報告2002(平成14)年度)", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "東シベリア、中央ヤクーチアにおけるアラス堆積物の花粉分析学的研究(タンデトロン加速器質量分析計業績報告2002(平成14)年度)"}]}, "item_type_id": "9", "owner": "1", "path": ["1243"], "permalink_uri": "https://doi.org/10.18999/sumrua.14.130", "pubdate": {"attribute_name": "公開日", "attribute_value": "2010-06-02"}, "publish_date": "2010-06-02", "publish_status": "0", "recid": "11709", "relation": {}, "relation_version_is_last": true, "title": ["東シベリア、中央ヤクーチアにおけるアラス堆積物の花粉分析学的研究(タンデトロン加速器質量分析計業績報告2002(平成14)年度)"], "weko_shared_id": null}