臺灣博碩士論文加值系統

溶解性有機物質（Dissolved Organic Matter, DOM）無處不在，在碳循環、水生生態系統和陸地生物化學循環中存在著重要之作用，而有色溶解性有機物質（Colored Dissolved Organic Matter, CDOM）為DOM具有光學特性的有機物質所組成。本研究利用激發發射矩陣光譜配合平行因子分析（Excitation Emission Matrix Spectroscopy - Parallel Factor Analysis, EEMs－PARAFAC），將三維螢光矩陣光譜分解為數個單螢光成分，揭示墾丁南灣海域CDOM之四季時空動態和物質長時間的光化學反應。研究成果表明此海域CDOM螢光主成分，春、秋及冬季為類腐植質（Peak A及C），夏季為類蛋白質（Peak T），夏季現地浮游動植物活動量大，使得總螢光特徵值略大於其他三季。以陸源輸入產生的Peak A、C及M類型CDOM與鹽度和營養鹽有顯著至高度正相關，而生物活動產生的Peak T類型CDOM則無顯著相關性。另由螢光指標顯示此海域CDOM來源為類蛋白質的測站佔 41.3%，類蛋白質和類腐植質兩者皆有影響的測站佔 58.7%，無測站以類腐植質為主，說明墾丁南灣海域 CDOM 以現地生物活動產生為主，陸源輸入為輔。光化學反應顯示，照光對CDOM影響不大，實驗七天後螢光強度穩定，物質也保持穩定。

Dissolved Organic Matter (DOM) is ubiquitous and plays a key role in the Organic carbon cycle and aquatic biogeochemical processes. Colored Dissolved Organic Matter (CDOM) is composed of Organic Matter with optical properties of DOM.
In this study, the three-dimensional fluorescence matrix spectrum was decomposed into several single fluorescence components by using Excitation Emission Matrix Spectroscopy - Parallel Factor Analysis (EEMs-PARAFAC) to reveal temporal and spatial dynamics of CDOM and the photochemical reaction off Nanwam, Kenting. The research results show that the main fluorescent components of CDOM in this area are humus-like substances (Peak A and C) in spring, autumn and winter, and protein-like substances (Peak T) in summer respectively. In summer, the activity of phytoplankton was stimulated, and the total fluorescent eigenvalue was slightly higher than that of the other three seasons. The salinity and nutrienc have good correlation with CDOM in Peak A, C and M components which fluorescences generated by terrestrial input, but poor correlation for Peak T fluorescences generated by biological activity. In addition, the source of CDOM was calculated from the fluorescence index, and indicated the only protein-like in 41.3%, and that both protein-like and humus-like in 58.7%, not humus-like in this area. Indeed, the CDOM off Nanwam, Kenting was mainly generated by local biological activity and supplemented by terrestrial sources. The seven days photoreaction experiment showed the CDOM substances keep steady and fluorescence intensity also stable.

摘要 ii
Abstract iii
致謝 v
目錄 vi
表目錄 viii
圖目錄 ix
第一章 前言 1
1.1有色溶解性有機物質介紹 1
1.2激發發射矩陣配合平行因子分析 2
1.3 CDOM的光化學反應 7
1.4墾丁南灣背景調查 8
第二章 研究動機與目的 10
第三章 研究方法 11
3.1設備與材料 11
3.2採樣地點與時間 12
3.3分析方法 14
第四章 結果與討論 17
4.1四季變化 17
4.1.1平行因子分析結果驗證 17
4.1.2 CDOM主成分分析 19
4.1.3 CDOM特徵值分佈與水文水質相關性 25
4.1.4 CDOM的HIX和BIX螢光指標 29
4.2光化學反應 31
第五章 結論 34
參考文獻 35

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