2019-08-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/655311摘要：砷在海洋中生物轉化作用是過去十幾年的海洋生物地球化學研究焦點。無機砷在海中的生物累積性與生物轉化作用仍然是亟待釐清的問題。浮游生物是高階生物的食物來源，在海洋環境中同時扮演砷的生物轉化作用。迄今，雖然有關砷的生物反應，結構形成和食階轉移的研究已經在海洋研究中逐漸受到重視，但對砷醣類與砷鹼類生物系統和相關的反應過程研究知之甚微。這些都是海洋食物鏈中有關砷的未解的重要問題。本研究將探討海洋食物鏈中砷的生物累積和生物轉化，本年度特別著重於砷醣類與砷鹼類。<br> Abstract: The occurrence and biotransformation of organoarsenicals, especially the arsenosugars and arsenobetaine, in the marine environments have been main focus during last decade. Inorganic arsenics accumulated and transformed by plankton is of major concerns. Plankton are considered as the base of the marine food chain, Studies on arsenic cycling in marine systems often cite phytoplankton as the first organisms involved in arsenic methylation, and trophic transfer in marine food chains have been important concerns due to health effects. Which have received major concerns in marine researches, however, these processes are still not very clear. This proposal, which includes the identifications and roles of arsenosugars and arsenobetaine in marine waters and planktons, and its pathways of formations will be studied, which will enhances the understanding of how and why the non-toxic compound arsenobetaine is formed in the marine environment.砷砷鹼生物累積生物轉化浮游生物砷醣食階轉移ArsenicArsenosugarArsenobetaineBioaccumulationBiotransformationPhytoplanktonZooplankton