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研究生:周柏翰
研究生(外文):Po-Han Chou
論文名稱:合歡山地區冷鐵杉混合林中台灣高山田鼠的覓食生態:探討植物特性的影響
論文名稱(外文):Foraging Ecology of Taiwan Field Vole (Microtus kikuchii)in a Taiwan Fir-Taiwan Hemlock Forest at the Hehuan Area: Effects of Plant Attributes
指導教授:林雨德林雨德引用關係
口試委員:林良恭徐濟泰何傳愷
口試日期:2014-06-12
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:生態學與演化生物學研究所
學門:生命科學學門
學類:生態學類
論文種類:學術論文
論文出版年:2014
畢業學年度:102
語文別:英文
論文頁數:95
中文關鍵詞:台灣冷杉林食性分析可食度台灣高山田鼠玉山箭竹
外文關鍵詞:Taiwan fir forest (Abies kawakamii)diet analysispalatabilityTaiwan field vole (Microtus kikuchii)Yushan cane (Yushania niitakayamensis)
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草食動物的覓食生態學有一重要議題在探討植物特性(如:化學特性、物理特性以及相對豐度)如何影響草食動物的覓食選擇;同時這也協助我們預測草食動物對植物群聚造成的影響。室內的植物可食度實驗和野外的動物食性分析,兩者結合,提供了了解覓食生態的重要資訊。台灣高山田鼠(Microtus kikuchii)為台灣特有種。先前研究已研究了高山草原中高山田鼠的覓食生態。本研究旨在了解在合歡山冷鐵杉混合林中植物特性對台灣高山田鼠的覓食生態之影響。我分析三個季節中(三月、七月以及十一月)台灣高山田鼠的食性,並同時進行餵食實驗,後者包含了五種優勢植種:玉山箭竹(Yushania niitakayamensis),玉山鬼督郵(Anisliaea reflexa),裂葉樓梯草(Elatostema trilobulatum),玉山擬鱗毛蕨(Dryopsis transmorrisonensis)以及日本曲尾苔(Dicranum japonicum)。我分別檢測五種植物的七種化學成分、硬度和相對豐度。結果顯示,高山田鼠的食性主要由玉山箭竹組成,並且不同植種對田鼠有不同的可食度。而在食性結果具有季節上的差異。化學成分對可食度具有顯著的影響:粗蛋白對可食度有正向的影響。另外,硬度對可食度有顯著的負向影響。基本上,食性分析和可食度的結果相吻合。總言之,在高山森林內對高山田鼠來說玉山箭竹仍是最重要的食物來源,植物特性也對可食度具有顯著的影響。

A key aspect of herbivore foraging ecology investigates how plant attributes, including chemical, physical characteristics, and relative abundance affect plant palatability and herbivore diets, which, in turn, help us predict the impact of herbivory on plant communities. The Taiwan field vole (Microtus kikuchii) is an endemic species in Taiwan. Previous studies have investigated its foraging ecology in alpine meadows. In this study, I aimed to understand the foraging ecology of Taiwan field voles in a Taiwan fir-Taiwan hemlock forest at the Hehuan area. I analyzed the diets of Taiwan field voles and conducted palatability feeding experiments in three seasons (March, July, and November). Five dominant plants were included in feeding experiments: Yushania niitakayamensis, Anisliaea reflexa, Elatostema trilobulatum, Dryopsis transmorrisonensis and Dicranum japonicum. I measured 7 chemical compounds, toughness, and relative abundance of the 5 species. The results showed that vole diets were mainly composed of Yushania niitakayamensis, which was also the most palatable plant. Different species had different palatability to voles. Vole diets showed significant seasonal effects. Chemical characteristic of plants affected palatability: crude protein had a positive effect. Furthermore, toughness had a negative effect on palatability. Besides, the results in diet analyses and palatability experiments were generally consistent with each other. In conclusion, Yushania niitakayamensis remains the most important food resource for Taiwan field voles in alpine forest. Plants attributes significantly influence palatability.

摘要 i
Abstract ii
Introduction 1
Materials &; Methods 7
Field survey 7
Vegetation survey 7
Vole trapping 8
Diet analyses 9
Palatability &; feeding trials 11
Chemical analyses 14
Toughness analyses 16
Statistical analyses 17
Results 19
Field survey 19
Vegetation composition 19
Animals trapping 19
Diets of Taiwan filed voles 21
Palatability of dominant plants 22
Effects of plant attributes on palatability 23
Effects of chemical characteristics of plants on palatability 23
Effects of physical characteristics of plants on palatability 24
Effects of abundance of plants on palatability 25
Diet analyses and palatability of dominant plants 25
Discussion 27
References 36
Appendix 81

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