| The rapid development of tourism has brought great benefits to the economy and society.However,the environmental problems are becoming more and more serious at scenic spot.Soil is the main environmental carrier of tourist area,the construction of tourism facilities,tourism traffic and trampling inevitably have an impact on the soil,at the same time,soil responds and feeds to the external disturbance through its property change.Soil magnetism is an important attribute of soil,and its property change can show and reveal that disturbance of human activities to soil environment to a certain extent.However,in a large number of research results,there is rare about soil magnetic property and its environmental implication of scenic spot.Therefore,it is necessary to strengthen this research.Based on the theory of environmental magnetism and the research results of soil magnetism,a study was conducted of soil magnetism property in Tianshan Heaven Lake scenic spot of Xinjiang in the support of project of National Natural Science Fund.In this study,magnetic parameters of topsoil and soil profile samples of Tianshan Heaven Lake scenic spot were systematically measured by environmental magnetism method.The aim of this study was to analyze the properties of soil magnetic parameters(concentration,composition and particle size of soil magnetic minerals)and spatial distribution patterns of Tianshan Heaven Lake scenic spot,and its environmental implications.The research results showed that:(1)The soils was dominated by ferromagnetic minerals(magnetite);the magnetic mineral concentrations of soil samples were intermediate;the main magnetic particles of soil were stable single domain(SSD)and super paramagnetic particles(SP).The soil magnetic properties of different tourism area were different,the ferrimagnetic minerals concentrations of tourism activity area were higher than the undisturbed area,but undisturbed area was opposite.The one way ANOVA analysis also showed that: there were significant differences in the concentrations of ferrimagnetic minerals and magnetic particles between the tourism activity area and undisturbed area,which showed that tourism disturbance had a significant influence on soil magnetic properties of tourism activity,magnetic properties of undisturbed area was related to soil formation process.(2)Magnetic mineral composition of soil profile was dominated by ferromagnetic minerals(magnetite)magnetic,the soil magnetic properties of different area were different,ferromagnetic mineral concentrations of each soil layers in traffic area were higher than other area,soil magnetic mineral concentrations in traffic area presents generally a trend of decrease with depth increased in the vertical direction,compared with the lower soil(20~50 cm),the upper soil(0~20 cm)particles in the traffic area were coarser and soil magnetic property were stronger,which showed that tourist traffic has obvious influence on the soil magnetic properties of traffic area.soil magnetic mineral concentrations of accommodation area increased with depth increased,upper soil(0~30 cm)particles were more fine than lower soil(30~50 cm)particles,which was related to hunman disturbance.soil magnetic property of background area was influenced by soil formation process,soil magnetic mineral concentrations decreased with depth increased,upper soil particles were more fine than lower soil.(3)The spatial distribution characteristics of soil magnetic parameter showed that: the ferrimagnetic mineral concentrations at surrounding area of Heaven Lake was higher than other area,especially at north of Heaven Lake,the concentration of ferrimagnetic minerals was highest.Form the spatial distribution of magnetic parameters of typical samples,the distribution of high-value points of magnetic parameter was consistent with distribution of the parking lot,road and wharf,the results indicated the soil of scenic spot was affected by tourist traffic and special service facilities. |
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