碩士 / 國立臺灣大學 / 海洋研究所 / 103 / Colloidal organic phosphorus (COP) plays an important role in marine P cycle; however, studies on COP are still scarce. This study focused on the distribution and variation of dissolved and colloidal organic phosphorus in euphotic zone of the Western Philippine Sea.
Seawater samples were separated into total dissolved (≤0.45 μm), truly dissolved (≤1 kDa), and colloidal (1 kDa ~ 0.45 μm) fractions by in-line filtration of 0.45 μm-size capsule filter and then Cross-Flow Ultrafiltration (1kDa). After separation, each fraction were digested by a high temperature oxidation method and analyzed by phosphomolybdate-blue spectrophotometry. Therefore, different fractions of both inorganic and organic phosphorus were determined.
Results shown that the DOP concentration ranged 0.06 ~ 0.24 μM, and the COP concentration ranged 0.03 ~ 0.15 μΜ in the euphotic zone. The COP accounted for a significant amount of 61±16% in the DOP. Also, it was found that the depths of COP maximum concentration coincided with the depths of chlorophyll A maximum. In addition, it is also found that COP varies between day time and night hours. All these evidences highlight the strong biological effect on production and assimilation of COP and its vital importance in marine P cycle.
| Identifer | oai:union.ndltd.org:TW/103NTU05279042 |
| Date | January 2015 |
| Creators | Chia-Yu Cheng, 鄭佳瑜 |
| Contributors | Liang-Saw WEN, 溫良碩 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 56 |
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