Abstract:Recently people have paid much attention to the impact of tourism activities on vegetation, such as ecological quality, biodiversity and landscapes assessment. However, the impact of tourism activities on population pattern has been not still studied. To provide some evidences about restoring and protecting vegetation in resorts, it is necessary to study the relationship between tourism activities and population pattern. Asso. Kobresia bellardii is selected on south top of Wutai Mountain, which is near to parking lots. From parking lots, one sampling belt is set up every five metre, and there are 5 belts in all. 128 contiguous quadrats (10cm×10cm ) are chosen on every belt, and there are 640 quadrats. These belts have the same physical condition. However, because of their different distances, they have the different tourism disturbance. The nearer it is, the more the disturbance is. Two-term local variance（TTLV）is a way for analyzing the relationship between species and environment on space. The pattern of Festuca rubra, Pocygonaceae viviparum and Kobresia bellardii is studied by TTLV because of dominant species and the mighty resistance. The results show that: (1) Three species show the same trend of regular distribution on the first belt, and have the evident difference on the fifth one. Different species have their own pattern on the second and fourth one because of tourism activities and interspecies competition, and are with obvious transition. (2) Tourism disturbance is the most at near distance. Although Festuca rubra is dominant species, it and other population all have many patches. When the distance increases, tourism disturbance begins to decrease, and interspecies compete drastically. Kobresia bellardii has dominant station at the far distance, and its scale is big. However, the scale of Festuca rubra patch are less, and the pattern of Pocygonaceae viviparum has no obvious rules, which may relates to its own physiological ecology. (3) TTLVA is a good way, and shows the ecological relationship among population. However, the pattern analysis is middle-size, and its result is different with the small pattern. In addition, to show the ecological mechanism of tourism disturbance, communities pattern still be need to study.