The Assessment of Human Activities Impact on Spatial Heterogeneity of Soil Environment - Taking DongPing Forest Park as an Example

Abstract

Research of the impact of tourism activities on the soil has been a focus in domestic and foreign environmental impact research. Targeted at spatial heterogeneity that domestic and foreign soil environment impact research seldom touches, this paper took Dongping Forest Park on Shanghai Chongming Island as a sample land and made Chongming Forest Tourism Festival the major driving factor. Through comparative analysis of bulk density, organic matter of soil and soil available nutrient before and after the festival, the paper adopted PCA ranking to study the spatial distribution and law of heterogeneity of soil environment evolution in Dongping Forest Park under the impact of human tourism activities, and concluded that: (1) bulk density, organic matter, available nitrogen and available phosphorus showed regular changes, but the change of available potassium was not evidently regular. (2) As for the impact strength on large spatial scale, active area＞buffer area＞background area; and from the aspect of sample land scale, the sample lands of floating bridge and stage performances in the active area were under the greatest impact from tourists, while amusement park and tea house were not so strongly affected; the flower viewing2 sample land in buffer area was more affected than the flower viewing3 sample land; the background area was the least affected. (3) Bulk density, organic matter and available nitrogen in sample lands show regular changes in spatial heterogeneity, while the change of available phosphorus and available potassium was not regular enough. The impact of tourism activities on overall spatial heterogeneity of soil showed a homogeneity tendency.