| Nowadays, the distribution of wild Amur Tiger (Panthera tigris altaica) in China only exists in the mountains of Jilin and Heilongjiang Provinces. During the two winters: 2003 and 2004' winter time, I recorded amount of data and collected many samples by tracking the snow tracks of wild Amur Tiger in the field in Hunchun Nature Reserve. It was for the first time research on wild Amur Tiger in China, ever. For the data management, I employed Arcview GIS to identify the attributes of 10 ecological variables, which were elevation, distance away from residence/road/river, vegetation type, road type, slope, aspect, land use type I and II. By using the ecological plug-in: Alternative Route, I analyzed the alternative routes for the original ones. And SPSS was used to manage all the statistic data. I then drew the conclusions below:1 By the photos of tigers, their pugmarks/beds/scrapes/scats/predation spot, and the samples of tiger hair and scat, it was safe to say there existed tiger in the reserve during my research. By integrating the evidences of pugmark measurement and tiger distribution, I advised that there were 7 individual tigers in the reserve. One is male sub-adult and the rest were male adults.2 By analyzing the ecological variables along the tiger trails, the importance of thesevariables was: elevation>distance away from residence>vegetation type>distance away from river>road type>aspect>slope>distance away from road>land use type I>land use type II. The first four variables held the following characters: the elevation was 370.74 ±144.16 m, and its distribution went as plateau-steep-plateau-steep. The distance away from residence was 7638.28 ± 4513.18 m, less than that of bed and scrape. The main cover was Mongolian Oak and willow and spruce, red pine as follow. The distance away from river was 436.07±445.26 m, which was a smooth curve.3 The importance of the 10 variables in the two winters was not the same. Whencomparing the two winters, the importance of road type and elevation were similar while the rest change much. The land use type II was in the third place in the first winter while ten in the second winter.4 By analyzing the alternative routes, I discovered that for several thousandalternative ones, they concentrated in a small spindle-like area. When the original route came forth the branch, the width of the spindle increased much. The density of the alternative routes varied, dense inside and sparse at the edge. The alternatives routes concentrated along the long axis of the spindle despite how was the shape of original route. In the topological way, I suggested that there existed the "ecological corridor" in the reserve. And this could help us identify the position and shape of the ecological corridors.5 Urine-scat scrape was significantly shorter than urine/none-trail scrape in size. Besides, the fore width of urine scrape was highly significantly wider than the none-mark one. The size of urine-scat scrape had the best uniformity, urine ones less, none-mark ones the least. In a same plot, the distance of the two neighboring scrapes was 0.28±0.16 km. And the distribution of the distances had 2 peaks, which were 0.30-0.49 km and 0.00-0.19 km, i. e., the distribution of the scrape was not random but well organized. By analyzing the ecological variables of the scrapes, the importance of these variables was: elevation > distance away from residence > distance away from river > land use type II > vegetation type > road type > distance away from road > land use type I > slope > aspect. The elevation was 357.00 ± 124.85 m. The urine scrape was highly significantly lower than none-mark ones in elevation, and the urine-scat ones was significantly lower than none-mark ones. The distance away from residence was 8829.63+4088.93 m. Urine scrape was significantly near the residence than none-mark ones. The distance away from river was 225.08 + 237.97 m and the urine one was significantly nearer than none-mark ones.6 In a same plot, the distance of two neighboring bed was 0.56 + 0.56 km and had two distrib...
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