台灣水韭棲地及其保育策略之研究

The Study on Habitats and Conservation Strategy of Isoetes taiwanensis DeVol.

邱明成(Ming-Chen Chiu)

指導教授 ： 張永達

國立臺灣師範大學/理學院/生物學系/碩士(2000年)

摘要

本研究的目的在於瞭解陽明山國家公園內的臺灣水韭的原生棲地夢幻湖近期變化及在其他具臺灣水韭區外保育潛力的冷水坑濕地與竹子湖人工池進行臺灣水韭移植的可能性，以期有利臺灣水韭物種的保育。
根據本研究調查，冷水坑溼地水位通常能維持在40-60cm的高度，水質呈現貧養化、雨量大於蒸發量及一年中能有高於20℃的時期，可符合臺灣水韭生長的需求，然而，如為了臺灣水韭的保育，當地會以臺灣水韭為食物來源的斑龜，應暫時隔離於臺灣水韭生長的水域之外。此外，本研究建議冷水坑溼地應進行土堤分隔或以渠道疏導，以控制暴雨逕流，減緩其淤沙衝擊。
夢幻湖的植被組成變化上不大，但水域範圍縮小與部分水文特質已有改變，使得陸生植物易於入侵，不利於臺灣水韭的生存。竹子湖人工池中種植之臺灣水韭應能完成生活史，但仍須人為的經營管理。就臺灣水韭的保育而言，建構一個新的人工濕地，可以是一項有效的保育策略。

關鍵字

台灣水韭 ； 保育 ； 溼地

並列摘要

The major purpose of this research project was to investigate the original and several ex-situ conservation habitats of quillworts in Taiwan , include the dream lake ,the Lengshuikeng wetland and Thu-tzu-hu. We focus on the hydrology and water quality of the Lengshuikeng wetland , located in Yangmingshan National Park, and try to transplant the endemic species quillworts or Taiwan isoetes (Isoetes taiwanensis DeVol). It has been regarded as a potential site for replanting Isoetes due to its acid water quality. Based on on-site investigations, the wetland can maintain wet year-round. The nutrients are sufficient to the submerged plant. In order to enhance the natural function and replanting performance, it is suggested that the wetland could be devide into two major part or make some channel around the wetland to control water level and sand input. For the conservation for Isoetes, Ocadia sinenesis must be isolated out of the water region of Isoetes.
Inviding of terraneous vegetation and changing of hydrological character in the dream lake are the serious problem to influence quillwort surviving. Isoetes planted in Zhu-tzu-hu should complete its life-cycle , but still need some management. To constructe a new artifical wetland seems to be a effective strategy for conservation of Isoetes taiwanesis.

並列關鍵字

Isoetes taiwanensis ； conservation ； wetland

參考文獻

張永達、楊冠政、童武夫，1991。光照對臺灣水韭葉片生長之影響，師大生物學報26，p1-10。

羅聖賢，1998。蘭嶼原生百合復育。台東農業專訊第十七期，p17。

Chang, H. J. and K. S. Hsu. 1977. Isoetes taiwanensis DeVol and its associates. Q. J. J. Chinese For. 10(2)：p138-142.

DeVol, C. E. 1972. Isoetes found on Taiwan. Taiwania 17(1)：p1-7.

張永達、楊冠政，1987。臺灣水韭之生理研究。台灣師範大學生物所碩士論文。