| Summary: | 碩士 === 國立臺灣大學 === 森林學研究所 === 90 === The biodiversity is the most important issue and idea in the research of conservation work now yet the range that such concept includes is very wide that it causes problem with its application in the real environment. Birds are highly sensitive to the changes of the composition of their habitats that they are positioned at the higher ends of the ecological system; and since compared to the other species, they are easier to be sampled and perceived etc, they are a very good biological indicator for biodiversity research of a larger scale. This study is based on the database from Wild Bird Federation Taiwan, WBFT to analyze the quality of such database in each county as well as the distribution pattern of the bird diversity in terms of place, elevation and season etc., also discussing about the characteristics of the distribution of the protected birds as well as the distribution of the birds’ hotspots. The results show that the sample effort for most of the countys in the database of birds can reflect the current situation of the bird diversity in that county roughly, yet it is commonly found that there are more data at low-elevation counties yet less data in certain counties in the period from June to August. In each county, the bird diversity has a significantly positive correlation with the area of that county and the range of its elevation spread, but the diversity of the migratory birds has nothing significantly correlated. On the elevational gradient, the breeding bird in each county at elevation about 1000m ~ 2000m is of the highest diversity that it shows a hump-curve. As for seasonal gradient, the diversity of the breeding birds is of not much fluctuation yet the diversity of the migratory birds is lower in the period from June to August. From the analysis of hotspots, it is found that there are significant correlations among breeding bird, protected species and endemic species. Also the distribution of the protected species in Taiwan is significantly shown localized. The results acquired for the bird diversity of each county from this study can serve as the reference of bird protection planning and nature conservation zoning jobs for each county. Besides, although the database of Wild Bird Federation Taiwan, WBFT is of a somewhat deviated structure, yet which can mostly reflect the situation of the bird diversity that it can be one of the most important links for promoting Taiwan Biological Resources Inventory in the future.
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