本論文主要探討顆粒性有機碳在台灣東部黑潮海域的時空變異。研究利用2012年9月、11月和2013年6月、9月，共四個航次於台灣東部黑潮海域橫斷面上八個測站進行，藉以探討此海域的物理、化學水文、生物相關參數的時空變異，以及上述因子對顆粒性有機碳的影響。結果顯示黑潮海域顆粒性有機碳濃度的空間分布呈現近岸高、離岸低，並在100公尺以深濃度遽減。就時序變化而言，顆粒性有機碳水體積分平均值在2013年的6月最高，2012、2013年9月次之，2012年11月最低。進一步分析顯示顆粒性有機碳和葉綠素甲濃度、聚球藻及真核超微浮游植物豐度有顯著正相關，但將葉綠素甲濃度、聚球藻及真核超微浮游植物豐度計算其碳含量後發現其總和不到顆粒性有機碳的十分之一，推測此海域的顆粒性有機碳可能因其它浮游生物群聚 (例如原生生物或浮游動物)所貢獻而非浮游植物生物量多寡所影響。

The purpose of this study is to understand the temporal and spatial variations of particulate organic carbon (POC) in the Kuroshio Waters, eastern Taiwan. This study was performed in four cruises (September, November 2012 and June, September 2013) with eight stations across the Kuroshio Waters, eastern Taiwan. The results show that the spatial distribution of POC concentration was high at the coastal zone and decreased offshore. Temporally, the highest POC was in June 2013, then in September 2012 and 2013, and the lowest value was in November 2012. Correlation analysis showed that POC was significantly regressed with chlorophyll a, Synechococcus, and Picoeukaryotes. However, the sum of chlorophyll a, Synechococcus, and Picoeukaryotes in term of carbon unit was contributed only about one tenth of POC. This result suggests that protista and/or zooplankton, instead of phytoplankton and bacterioplankton, might be the major components of POC in the Kuroshio Waters.

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