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沖縄のマイクロプラスチックとナノプラスチック– プランクトン微細藻類および内共生渦鞭毛藻への潜在的影響
https://doi.org/10.15102/1394.00001666
https://doi.org/10.15102/1394.0000166623127c17-3da3-438a-bc70-9e9b039a06ee
名前 / ファイル | ライセンス | アクション |
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Final_Exam_Abstract (42.9 kB)
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Item type | 学位論文 / Thesis or Dissertation(1) | |||||||
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公開日 | 2020-12-15 | |||||||
タイトル | ||||||||
言語 | ja | |||||||
タイトル | 沖縄のマイクロプラスチックとナノプラスチック– プランクトン微細藻類および内共生渦鞭毛藻への潜在的影響 | |||||||
タイトル | ||||||||
言語 | en | |||||||
タイトル | Micro- and Nanoplastic in Okinawa: Potential impacts on planktonic microalgae and Endosymbiotic Dinoflagellates | |||||||
言語 | ||||||||
言語 | eng | |||||||
資源タイプ | ||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
資源タイプ | doctoral thesis | |||||||
ID登録 | ||||||||
ID登録 | 10.15102/1394.00001666 | |||||||
ID登録タイプ | JaLC | |||||||
アクセス権 | ||||||||
アクセス権 | open access | |||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
著者 (英) |
Ripken, Christina
× Ripken, Christina
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抄録 | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | From coast to gyre, from surface to deep sea, the study of marine plastic pollution takes us on a journey of potential harm through our marine ecosystems, where man-made plastics break down into ever smaller pieces along their way. Studying micro- and nanoplastic pollution in field and laboratory work, new insights into microalgae interactions, and these smallest plastic particles were gathered. Mimicking two different environments in the laboratory - reef and open ocean water - an effect assessment of four different microalgae species (Diatoms Skeletonema grethae and Odontella aurita, cyanobaterium Synechococcus elongatus, endosymbiontic dinoflagellates Symbiodinium tridacnidorum and Cladocopium sp.) and their interaction with micro- and nanoplastics at different sizes, types, and concentrations was conducted. Aggregation, sedimentation, photosynthesis, extracellular substance production, and RNA expression patterns were all found to be affected. Specifically, hetero-aggregation with nanoplastic led to neutrally buoyant marine snow, differentially expressed genes, and reduced photosynthesis. Furthermore, an exposure assessment around Okinawa, an isolated subtropical island with fringing reefs, found that microplastic pollution follows the island’s population gradient. Polyethylene was the most abundant polymer found 45%, and of the ubiquitous sub 20 μm plastics, the majority was embedded in organic matter. | |||||||
言語 | en | |||||||
口頭試問日 | ||||||||
2020-11-05 | ||||||||
学位授与年月日 | ||||||||
学位授与年月日 | 2020-11-30 | |||||||
学位名 | ||||||||
学位名 | Doctor of Philosophy | |||||||
学位授与番号 | ||||||||
学位授与番号 | 甲第65号 | |||||||
学位授与機関 | ||||||||
学位授与機関識別子Scheme | kakenhi | |||||||
学位授与機関識別子 | 38005 | |||||||
学位授与機関名 | Okinawa Institute of Science and Technology Graduate University | |||||||
著者版フラグ | ||||||||
出版タイプ | VoR | |||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
権利 | ||||||||
権利情報 | © 2020 The Author. |