碩士 / 國立東華大學 / 自然資源與環境學系 / 99 / Since 1999, the NDHU Amphibian Conservation Laboratory has conducted ecological monitoring of Anuran in Coastal Range. Given that most areas of the Range are undeveloped primary forests where people can hardly get to, we used MAXENT to know the potential geographic distribution of frogs and to find the biodiversity hotspots throughout the Coastal Range. These results will provide basic data in for further monitoring and conservation on amphibians.
In this study, we used the climate layers (spatial resolution of 40 square meters) that included Mean Temperature of warmest month, Mean Temperature of coldest month, Precipitation of Wettest Quarter, Precipitation of Driest Quarter, Annual Mean Temperature, Annual Precipitation, altitude and warmth index. The results showed that frogs in Coastal Range could be classified into 5 categories: (1) General in the north but fragmental in the others. (2) Only in the south. (3) Only in the central and southern parts. (4) General throughout the Coastal Range. (5) Only in the north.
The most useful climate variables is were Annual Mean Temperature and Annual Precipitation. According to the types of climate variables, frogs in Coastal Range could be categorized into four groups. The first group is consisted of B. bankorensis, Rh. aurantiventris and R. swinhoana; the second group is comprised H. chensis and M. inornata, and the third one included K. eiffingeri and Rh. moltrechti. All the other frogs which are not mentioned above belonged to the fourth groups.
In regard to the climate variables and species occurrence response curve, different species had different preferences for habitats. The main limiting factor was temperature and precipitation, and that was also related to the seasons and the habitats chosen by frogs.
We calculated the amount of frog species in each grid, and made the grid containing 13-17 species a hotspot. Now the hotspots are located in the northern part of Coastal Range, low elevation areas including Ruisui county to Yuli township, Changbin county, and Fuli county to Luye county. We overlapped the hotspots on the current conservation area in Coastal Range, and it turned out that only 0.7% of the hotspots were protected. We suggest that besides the follow-up monitoring on hotspots, the plans for conservation measures are important as well.
| Identifer | oai:union.ndltd.org:TW/099NDHU5399041 |
| Date | January 2011 |
| Creators | Wen-Bin Gong, 龔文斌 |
| Contributors | Yi-Ju Yang, 楊懿如 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 86 |
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