2006-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/698882摘要：生態區位假說(niche theory)預測，在資源有限的狀況下，資源使用相近的共域物種利用資源的區隔(resource partitioning)程度較該些物種不共域時明顯，亦即這些物種共域時的食性重疊度較各自分布時低。以往蝙蝠研究多為比較兩種同屬蝙蝠共域與否之食性重疊度，或三種以上不同屬蝙蝠的食性區隔，較缺乏多種近似種共域時食性區隔的比較。本研究擬利用台灣產鼠耳蝠屬與管鼻蝠屬中，同時會有3-4種同屬蝙蝠共域的特色，比較多種同屬蝙蝠共域與否之種內與種間食性重疊度與食物資源之關係，以進一步檢視多物種共域時之資源區隔，以及與生態區位假說。 本研究將分三年前往先前調查已知的數個有3-4種鼠耳蝠屬與管鼻蝠屬共域之地點，與數個僅有1種該兩屬蝙蝠出現之地點，進行蝙蝠種類、相對數量的調查，並以霧網與豎琴網活捉蝙蝠，收集其排遺、分析其食性，並收集調查地點附近夜間之蟲相，包括種類與數量。計算各種蝙蝠之食性與當地蟲相之關係，並比較同屬蝙蝠共域與否之種內與種間食性重疊度與食物資源之關係。 <br> Abstract: Niche theory predicts that, under limited resources, sympatric species using similar resources should partition their resources utilization, i.e. the interspecific overlap of the trophic niches between coexisting sibling species is lower than when they are allopatric. Such prediction has been examined in many studies with two congenic sibling species or several sympatric species of different genera. However, few studies were conducted to examine the situation when more than two congenic species coexist. In this project, we intend to take advantage of the diverse bat fauna in Taiwan where 3-4 congenic species of genera Myotis and Murina and investigate the degree intra- and inter-specific dietary overlap among congenic species living either sympatrically or allopatrically and their relationship with local insect resources. Results from this study can help examine resource partitioning and niche theory in multiple sympatric sibling species. The project will be conducted in three years at several locations identified in previous bat survey where 3-4 Myotis and Murina species aree know to occur sympatrically, and several other locations where only one Myotis and/or Murina species occurs. Relative abundance of coexisting bat species at these locations will be checked before mist-netting and harp-net trapping will be conducted. Fecal samples of bats will be collected and later analyzed in the lab to record the insect species and relative volume of their content. Insect fauna at each location will be survey during the nights where mist-netting are conducted. Diet of different species of bats and the degree intra- and inter-specific dietary overlap among these bat species living either sympatrically or allopatrically will be calculated, and their relationship with local insect resources will be examined.鼠耳蝠管鼻蝠食性資源區隔生態區位競爭MyotisMurinadietresource partitioningnichecompetition