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題名 | 武陵地區七家灣溪石附生藻類之拓殖=Colonization of Epilithic Algae in the Cijiawan Stream of the Wuling Area |
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作者 | 林資沁; 林幸助; Lin, Zih-cin; Lin, Hsing-juh; |
期刊 | 國家公園學報 |
出版日期 | 20110600 |
卷期 | 21:2 2011.06[民100.06] |
頁次 | 頁1-8 |
分類號 | 379.2 |
語文 | chi |
關鍵詞 | 葉綠素a; 群集結構; 潭; 瀨; 演替; Chlorophyll a; Community structure; Pool; Riffle; Succession; |
中文摘要 | [摘要] 颱風暴雨之後,高山溪流流量增加,常刮除石附生藻類,導致藻類重新演替,可能影響溪流生物之食物來源。本研究目的在探討冬、夏季,武陵地區七家灣溪瀨、潭區石附生藻類從無到有的拓殖過程中,葉綠素a濃度、生物體積與群集結構之變化。在瀨、潭區分別放置粗石進行28天拓殖實驗,並每兩天監測環境因子之變化。結果顯示,瀨區石附生藻類葉綠素a濃度累積以夏季較高。瀨區冬、夏季藻類平均葉綠素a濃度分別為21.01與40.96 mg m-2,於第26及20天可達野外濃度。而潭區冬、夏季藻類平均葉綠素a濃度在第28及22天達最高,分別為12.52與9.85 mg m-2,但仍低於野外濃度。在冬季,瀨區以小型矽藻與大型矽藻為主要優勢藻類,潭區則以大型矽藻為主。夏季,瀨區與潭區皆以大型矽藻為主要優勢藻種。本研究結果估計七家灣溪受颱風暴雨侵襲後,石附生藻類約需要一個月時間才能恢復瀨區野外生物量。 |
英文摘要 | ABSTRACT Food sources of aquatic consumers in mountain streams would be influenced by high discharge due to typhoon rainfall. The aim of this study was to explore the colonization of epilithic algae in the Cijiawan Stream. The accumulation of chlorophyll a (Chl a) concentration, biovolume, and community structure during colonization were monitored. Rubbles were set in riffles and pools in the stream in winter and summer for 28 days. Epilithic algae were collected and environmental factors were measured by an interval of two days during the study period. The results showed that the Chl a concentration were higher in summer both in the riffles and pools. The Chl a concentration in the riffles in winter and summer was 21.01 mg m-2and 40.96 mg m-2, respectively. They achieved a similar amount of concentration in the field at the 26th day. However, Chl a concentration in the pools in winter and summer were both lower than that in the field. They achieved a maximum concentration at the 28th, 22th day, reaching12.52 and 9.85 mg m-2, respectively. In winter, small diatoms and large diatoms were dominant in the riffles, but large diatoms were dominant in the pools. In summer, however, large diatoms were dominant in both riffles and pools. Our results suggest that the recovery time of epilithic algae after typhoon rainfall back to the field amount of concentration in the riffles of the Cijiawan Stream is about a month. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。