頁籤選單縮合
題 名 | Dinoflagellate Associations in Feitsui Reservoir, Taiwan=翡翠水庫之渦鞭毛藻群落 |
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作 者 | 吳俊宗; 周晉文; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷 期 | 39:2 1998.04[民87.04] |
頁 次 | 頁137-145 |
分類號 | 379.2 |
關鍵詞 | 翡翠水庫; 渦鞭毛藻; 角甲藻; 多甲藻; 生態; 湖沼學; 浮游藻; Ceratium; Dinoflagellate association; Ecology; Feitsui reservoir; Limnology; Peridinium; Phytoplankton; |
語 文 | 英文(English) |
中文摘要 | 翡翠水庫內之渦鞭毛藻計有三種,分別為角甲藻(Ceratium furcoides (Levander) Langhans )、 二角多甲藻( Peridinium bipes Stein )和盾形多甲藻( P. umbonatum Stein var. umbonatum ),以二角多甲藻出現數量最多。 從 1990 至 1994 年 在水庫八個採樣點所做之分析中發現,雖然此三種藻類主要出現之季節不甚相同,但是最適 水溫同為 24 ∼ 26 ℃間。秋末冬初是渦鞭毛藻數量最多的季節,其成因與季風雨自集水區 帶來之污染有關。分析結果顯示,渦鞭毛藻之出現數量主要與水中之磷鹽、總有機碳、總菌 數、生化及化學需氧量等有密切關係,而與氮鹽較無相關。此外,多甲藻之數量與水中鈣含 量之相關性不高。其原因可能係因水中之鈣和氮鹽之含量已夠高,非為渦鞭毛藻生長之限制 因子。從多項結果顯示,多甲藻和角甲藻對鈣及其他多項化學因子之需求不同,此可能是造 成二者在水庫出現時間及分佈上不同之主因。水庫自 1991 年起,水中磷鹽濃度維持不變, 但是氮鹽持續增加,此可能是導致甲藻類數量減少,而藍綠藻和綠藻成為優勢之主因,從本 研究顯示,氮鹽是影響翡翠水庫甲藻類數量消長的主要因子之一。 |
英文摘要 | In Feitsui Reservoir, dinoflagellate association was composed of three species: Ceratium furcoides (Levander) Langhans, Peridinium bipes Stein, and P. umbonatum Stein var. umbonatum. The environmental factors affecting their occurrence were studied at eight sites in the reservoir between January 1990 and December 1994. The peak occurrence of dinoflagellates, at water temperatures between 24 and 26 ℃, was related to the high watershed runoff due to monsoon rainfall in autumn. The abundance of dinoflagellates was positively correlated with the concentrations of phosphorus, total organic carbon, bacterial number, and chemical as well as biochemical oxygen demand in the water. The decrease in dinoflagellate abundance since 1991 has been followed by the prevalence of nannoplankton such as cyanobacteria and green algae. This coincided well with the continuous increase in N-nutrients in waters, which favors the growth of nannoplankton. It is assumed that N-nutrients play a more important role than P-nutrients in regulating the succession of dinoflagellates in this reservoir. |
本系統中英文摘要資訊取自各篇刊載內容。