| Summary: | 碩士 === 國立臺灣大學 === 森林環境暨資源學研究所 === 107 === Heartwood decay fungi play important roles in forest dynamics. However, the study on their biology, physiology, and ecological roles in forest regeneration is very limited in Taiwan. The objective of this study is to identify the key factors that determine the ecological distribution of a heartwood decay fungus, Phellinus gilvus, often found in mid-altitudinal natural forest in Taiwan. With the design and employment of a quick stratified sampling method based on Actual Vegetation Maps of Taiwan, data of the occurrences and absence of P. gilvus across natural forest in northern and central Taiwan was obtained, including biological variables concerning the host trees and host forest, as well as environmental variables concerning the habitat and climate. The quick survey method was proven to be efficient in acquiring samples to build a dataset of a certain species for the analysis of its distribution. The analysis of the dataset shows that P. gilvus generally occurs in locations with relatively little temperature fluctuation and in forest with a greater proportion of Fagaceae trees. All of the fruitbodies occur on trees of the family Fagaceae with large diameters of breast height. Montane evergreen broadleaf forest is the most suitable vegetation type for P. gilvus, while occurrences were also recorded scattering in other vegetation types with similar climatic conditions and large dominant Fagaceae trees. The results of this study provide important base for future studies on the ecological roles of heartwood decay fungi in forest. Moreover, the quick survey method may be applied to the study of distribution of other species.
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