{"created":"2023-07-25T11:09:55.922979+00:00","id":14034,"links":{},"metadata":{"_buckets":{"deposit":"4a61659f-5fee-4732-9a48-07dd2464d653"},"_deposit":{"created_by":36,"id":"14034","owners":[36],"pid":{"revision_id":0,"type":"depid","value":"14034"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00014034","sets":[]},"author_link":["55716","55714","55718","55715","55717"],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2017-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"82","bibliographicPageStart":"72","bibliographicVolumeNumber":"11","bibliographic_titles":[{},{"bibliographic_title":"Polar Science","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Lakes from the Antarctic maritime region experience climate change as a main stressor capable of modifying their plankton community structure and function, essentially because summer temperatures are commonly over the freezing point and the lake's ice cap thaws. This study was conducted in such seasonally ice-covered lake (Lake Limnopolar, Byers Peninsula, Livingston Is., Antarctica), which exhibits a microbial dominated pelagic food web. An important feature is also the occurrence of benthic mosses (Drepanocladus longifolius) covering the lake bottom. Plankton dynamics were investigated during the ice-thawing transition to the summer maximum. Both bacterioplankton and viral-like particles were higher near the lake's bottom, suggesting a benthic support. When the lake was under dim conditions because of the snow-and-ice cover, autotrophic picoplankters dominated at deep layers. The taxa-specific photopigments indicated dominance of picocyanobacteria among them when the light availability was lower. By contrast, larger and less edible phytoplankton dominated at the onset of the ice melting. The plankton size spectra were fitted to the continuous model of Pareto distribution. Spectra evolved similarly at two sampled depths, in surface and near the bottom, with slopes increasing until mid-January. However, slopes were less steep (i.e., size classes more uniformly distributed) at the bottom, thus denoting a more efficient utilization of resources. These findings suggest that microbial loop pathways in the lake are efficiently channelized during some periods to the metazoan production (mainly the copepod Boeckella poppei). Our results point to that trophic interactions may still occur in these lakes despite environmental harshness. This results of interest in a framework of increasing temperatures that may reduce the climatic restrictions and therefore stimulate biotic interactions.","subitem_description_type":"Abstract"}]},"item_10001_description_6":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"季節的に結氷する海洋性南極のリビングストン島Limnopolar湖において、プランクトン群集構造と機能が調べられた。湖面が雪と氷に覆われ薄暗い状態では、深層では独立栄養性のピコプランクトン、特にピコシアノバクテリアが優占していた。融氷期から盛夏にかけては湖底近くに浮遊性バクテリアとウイルス様顆粒がともに多く、対照的にサイズが大きく被食されにくい植物プランクトンは、湖氷の融解開始時に優占していた。プランクトンのサイズスペクトルは連続型のパレート分布を示し、特に深層での一月中旬までのサイズスペクトルの傾斜は緩やかで、より効率的な資源利用が行われていることが考えられる。これらのことからこの湖の微生物食物網は，ある時期には主にカイアシ類へと送り込まれることになり、厳しい環境下でも栄養段階間の相互作用が起こっていることを示す。気候的制約を軽減させ、生物間相互作用を強化するであろう気候温暖化を考える上で、興味深い結果である。","subitem_description_type":"Other"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"10.1016/j.polar.2017.01.001"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://dx.doi.org/10.1016/j.polar.2017.01.001","subitem_relation_type_select":"DOI"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"18739652","subitem_source_identifier_type":"ISSN"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Rochera, Carlos","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Quesada, Antonio","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Toro, Manuel","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Rico, Eugenio","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Camacho, Antonio","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Peninsula Byers","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Ice-covered lake","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Boeckella poppei","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Top-down control","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Pareto distribution","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"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":"Plankton assembly in an ultra-oligotrophic Antarctic lake over the summer transition from the ice-cover to ice-free period: A size spectra approach","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Plankton assembly in an ultra-oligotrophic Antarctic lake over the summer transition from the ice-cover to ice-free period: A size spectra approach"},{"subitem_title":"Plankton assembly in an ultra-oligotrophic Antarctic lake over the summer transition from the ice-cover to ice-free period: A size spectra approach","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"36","path":["1758"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-02-28"},"publish_date":"2017-02-28","publish_status":"0","recid":"14034","relation_version_is_last":true,"title":["Plankton assembly in an ultra-oligotrophic Antarctic lake over the summer transition from the ice-cover to ice-free period: A size spectra approach"],"weko_creator_id":"36","weko_shared_id":-1},"updated":"2023-07-25T15:26:08.899545+00:00"}