本研究探討南海北部海域0–5 公尺表層海水中鈣板金藻的季節變化及空間分布。調查自2002年4月至2003年7月，共有5個航次25個採樣點。以掃描式電子顯微鏡 (SEM) 觀察及計算水體中鈣板金藻之物種與數目，觀察期間共發現28種類鈣板金藻，以Emiliania huxleyi為主要優勢物種，其相對豐富度佔總鈣板金藻的61.7%、其次為Gephyrocapsa oceanica (16.0%)、G. ericonii (6.9%)、Umbellosphaera irregularis (4.3%) 及U. tenuis (4.9%) 為主。南海鈣板金藻生物量範圍介於1.98-127.43×103 L-1，各季節平均生物量以冬季最高 (61.76±28.19×103 L-1)，夏季最低 (8.44±1.67×103 L-1)。海盆區鈣板金藻生物量與[NO2+NO3]、SRP有直線的正相關 (p<0.05)。主成份分析 (Principal component analysis) 結果顯示：南海的鈣板金藻可區分為春冬與夏秋二群，春冬季以E. huxleyi為主，其次為G. oceanica，夏秋季則轉變為以U. irregularis及U. tenuis為主。依空間分布來看，海盆區與陸棚區鈣板金藻群落結構隨季節變化有不同的表現，陸棚區春夏秋三季以E. huxleyi為主，次為G. oceanica，冬季則以G. oceanica為主，次為E. huxleyi。海盆區的春冬季以E. huxleyi與G. oceanica為主，夏秋季以U. irregularis與U. tenuis。兩次現場營養鹽添加培養實驗，因組內差異過大並未獲得具體結果。

This research investigated the spatial and seasonal distributions of coccolithophorids in surface water of the northern South China Sea. The surveyes covered the period from April 2002 to July 2003 and 5 curises , 25 sampling station during four season. Abundance and taxa of coccolithophorids were studied by the scanning electron microscopy. A total of 28 species were identified. Emiliania huxleyi dominated in the surface water of the South China Sea, and has highest relative abundance (61.7%), then were Gephyrocapsa oceanica (16.0%), G. ericsonii (6.9%), Umbellosphaera irregularis (4.3%), and U. tenuis (4.9%). The cell density of coccolithophorids ranged from 1.98 to 127.43×103 cells L-1 during study period. The highest average cell density of coccolithophorids occured in the winter (61.76±28.19×103 cells L-1), lowest in the summer (8.44±1.67×103 cells L-1). Coccolithophorids cell density in basin showed a positive linear relation with [NO2+NO3] and SRP (p<0.05). Principal component analysis indicates coccolithophorids could be identified as two separate groups: spring-winter and summer-autumn. E. huxleyi dominated in spring and winter, followed by G. oceanica. U. irregularis and U. tenuis dominated in the summer and autumn. Spectially, coccolithophorids communities differed in the shelf and the basin, with seasonal changes. In the shelf, E. huxleyi dominated in the spring, summer, and autumn, and followed by G. oceanica. G. oceanica dominated in the winter, and followed by E. huxleyi. In the basin, while E. huxleyi and G. oceanica dominated in the spring and winter, U. irregularis and U. tenuis dominated in the summer.

中文摘要 ……………………………………………………………………… I
英文摘要 ……………………………………………………………………… II
目錄 …………………………………………………………………………… III
表目錄 ………………………………………………………………………… IV
圖目錄 ………………………………………………………………………… V
前言 …………………………………………………………………………… 1
文獻回顧 ……………………………………………………………………… 3
材料與方法 …………………………………………………………………… 8
結果 …………………………………………………………………………… 12
討論 …………………………………………………………………………… 48
參考文獻 ……………………………………………………………………… 50
表 ……………………………………………………………………………… 57
圖 ……………………………………………………………………………… 82
個人履歷 ……………………………………………………………………… 115

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