臺灣博碩士論文加值系統

為了解台灣東北部沿岸海域纖毛蟲之季節變動與環境關係，於2000年至2001年間進行一年的觀測，並進一步探討季節轉變時。在整體季節變動上，纖毛蟲數量介於0~ 2140 cells/L，季節變動明顯呈現冬低夏高的現象，在夏季時表現出兩次高值，一為五月梅雨季節時，降雨帶入陸源性物質所形成的梅雨高峰 (平均值> 600 cells/L)，另一為颱風通過後，水體攪動所形成的颱風高峰 (平均值> 400 cells/L)。此外，異營與混營性纖毛蟲均出現在梅雨高峰，而颱風高峰主要由中小型混營性纖毛蟲Strombidium sp2、sp3及大型Laboea spp.為主。微小纖毛蟲及小型纖毛蟲全年都出現，中型及大型纖毛蟲僅出現在夏天，最高可達纖毛蟲總數的60%。梅雨高峰主要由小型混營纖毛蟲Strombidium sp2及微小型異營纖毛蟲Strobilidium sp1所組成，颱風高峰則為中型纖毛蟲所貢獻。種類組成上，十分類似，僅在季節高值時會由少數一兩種種類驟增而形成，另外在兩次高峰間則為許多種類混合成長較具多樣性。本研究海域屬於貧營養沿海域，因此混營性纖毛蟲對葉綠素的貢獻量均在1%以下，僅在梅雨高峰與颱風高峰有較高貢獻度，所含葉綠素分別為0.03 μg/L與0.085 μg/L，所佔總葉綠素貢獻度分別為5.7%及4.8%。

The temporal variation of oligotrich ciliates population at a station on the northeasterern coast of Taiwan was invested during the period from October 2000 to September 2001. A clear seasonal cycle was found with 80-100 folds increase in the abundance during the warm seasons. Ciliates abundance in this period showed a bimodal distribution with two peaks, a Rainy Peak and a Typhoon peak. The Rainy Peak was induced by particulate and dissolved organic carbon in the rain water, and the dominant species was small mixotrophic or heterotrophic Strombidium sp. and small heterotrophic Strobilidium sp. In contrast, the typhoon peak was composed of small/middle- sized of Strobidium sp. and large-size Laboea spp.. All these species were apparently mixotrophic. Mixotrophic ciliates usually contribute less 1% to total chlorophyll. Higher contribution of more than 5% occurred only at the peaks of ciliate abundance.

1. 前言…………………………………………………… 1
2. 材料與方法…………………………………………… 4
2-1採樣地點、時間及採樣方式………………………………… 4
2-2細胞計數與量測體積………………………………………… 4
2-3混營性纖毛蟲葉綠素a含量推估…………………………… 6
2-4資料分析.……………………………………………………… 6
3. 結果…………………………………………………… 8
3-1溫度與雨量季節變動………………………………………… 8
3-2少毛類纖毛蟲的季節變動………………………………… 8
3-3纖毛蟲細胞大小的季節變動…………………………… 9
3-4纖毛蟲組成的季節變動……………………………………… 10
3-5混營性纖毛蟲葉綠素含量與貢獻…………………………… 10
4. 討論…………………………………………………… 12
4-1季節變動……………………………………………………… 12
4-2颱風攪動與微生物環關係…………………………………… 12
4-3混營性纖毛蟲重要性………………………………………… 14
參考文獻…………………………………………………………… 16

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