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We observed significant temporal and spatial variations in phytoplankton size and taxonomic composition, although chlorophyll a concentrations were generally below 1 μgl^\u003c-1\u003e during both periods. Microphytoplankton (\u003e20 μm), mainly diatoms, were prominent in the euphotic zone in the southernmost area around 66.5°S during late summer. In the rest of the study area during both cruises, the phytoplankton community was dominated by pico- and nano-sized populations (\u003c20 μm) throughout the euphotic zone. The small-size populations mostly consisted of diatoms and haptophytes, although chlorophytes were dominant in extremely cold water (-1.5°C) below the overlying warm water around 65.5°S during late summer. From late summer to early autumn, chlorophytes declined in abundance, probably due to increasing temperature within the euphotic zone (-1 to 0°C). 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Size fraction and class composition of phytoplankton in the Antarctic marginal ice zone along the 140°E meridian during February-March 2003
https://nipr.repo.nii.ac.jp/records/10081
https://nipr.repo.nii.ac.jp/records/10081f2656c31-166b-4dd7-89a8-b83a76388656
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2014-10-15 | |||||
タイトル | ||||||
タイトル | Size fraction and class composition of phytoplankton in the Antarctic marginal ice zone along the 140°E meridian during February-March 2003 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Size fraction and class composition of phytoplankton in the Antarctic marginal ice zone along the 140°E meridian during February-March 2003 | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Phytoplankton | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Size fraction | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Class composition | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Marginal ice zone | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Ammonium | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Phytoplankton | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Size fraction | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Class composition | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Marginal ice zone | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Ammonium | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Hashihama, Fuminori
× Hashihama, Fuminori× Hirawake, Toru× Kudoh, Sakae× Kanda, Jota× Furuya, Ken× Yamaguchi, Yukuya× Ishimaru, Takashi× Hashihama, Fuminori× Hirawake, Toru× Kudoh, Sakae× Kanda, Jota× Furuya, Ken× Yamaguchi, Yukuya× Ishimaru, Takashi |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We investigated the size fraction and pigment-derived class compositions of phytoplankton within the euphotic zone of the Antarctic marginal ice zone between 63.3°S and 66.5°S along the 140°E meridian on two consecutive cruises in the late austral summer and early austral autumn of 2003. We observed significant temporal and spatial variations in phytoplankton size and taxonomic composition, although chlorophyll a concentrations were generally below 1 μgl^<-1> during both periods. Microphytoplankton (>20 μm), mainly diatoms, were prominent in the euphotic zone in the southernmost area around 66.5°S during late summer. In the rest of the study area during both cruises, the phytoplankton community was dominated by pico- and nano-sized populations (<20 μm) throughout the euphotic zone. The small-size populations mostly consisted of diatoms and haptophytes, although chlorophytes were dominant in extremely cold water (-1.5°C) below the overlying warm water around 65.5°S during late summer. From late summer to early autumn, chlorophytes declined in abundance, probably due to increasing temperature within the euphotic zone (-1 to 0°C). These pico- and nano-phytoplankton-dominated populations were often accompanied by relatively high concentrations of ammonium, suggesting the active regeneration of nutrients within the small-size plankton community. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 南極アデリーランド沖 (140°E線上・63.3-66.5°S) における植物プランクトンサイズおよび群集組成を、2003年の2月下旬と3月上旬に調査した。観測海域の大部分でクロロフィルa 濃度は1μg l-1以下と低く、直径20μm以下のピコ・ナノサイズの群集が優占していた。それらの群集は主に珪藻類やハプト藻類から構成されていたが、2月下旬の65.5°Sの観測点においては混合層直下の極低温水塊 (-1.5°C) で緑藻類が優占していた。有光層内のアンモニウム塩濃度は全域を通して比較的高く (>0.2μM)、ピコ・ナノ植物プランクトン群集は高い捕食圧の下で再生した栄養塩を利用して維持されていることが示唆された。 | |||||
書誌情報 |
Polar science en : Polar science 巻 2, 号 2, p. 109-120, 発行日 2008-06 |
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出版者 | ||||||
出版者 | 国立極地研究所 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12240481 | |||||
論文ID(NAID) | ||||||
識別子タイプ | NAID | |||||
関連識別子 | 110006914991 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://doi.org/10.1016/j.polar.2008.05.001 | |||||
関連名称 | 10.1016/j.polar.2008.05.001 |