| LUCC (land-use and land-cover change) is one of the key themes for the global changes at present. It's the main research method that the technologies of RS, GIS, and GPS apply to LUCC. The integrate technologies of RS, GIS, and GPS can obtain the accurate information for LUCC in time, serving for the sustainable use for the land.Landscape ecology was originated from the land- study, and its object of the research was the land mosaics, applying to the land-use mainly . That we study the land-resource distribution by the theories and methods of landscape ecology can offer a kind of method for the research of LUCC, evaluate and predicate at the course of LUCC, supply the scientific basis for rationally utilizing land.By utilizing pattern analytical methods of landscapes ecology, the thesis studies land-use and land-cover change at different periods at the areas of Bashang in Zhangjiakou. The thesis proceeds from reality of Bashang, divides Bashang's landscape into six kinds altogether , such as cultivated land , forest land , grassland , water areas , builded-up landscape and bare-land . Through the image of remote sensing interpretation, we classify Bashang's landscape tentatively, get the data of forms of different type's landscape of the area of Bashang, complementing with the information of many kinds of reference. These data were calculated. The landscape indices were received, such as the ratio for interior edge, fractal dimension, landscape diversity index, landscape dominance index, landscape isolation, coefficient of variation to the landscape etc. The change of landscape pattern were compared at the area of Bashangand four counties in 1987and 2000.The key elements of landscape and landscape ecosystem are dynamic change. The stability of the landscape is shown as the stability of the key element of the landscape and stability of the landscape ecosystem. Because of the influence in factors, such as weather, vegetation, soil ,etc..., the stability of the key element of the landscape of the four counties on the Bashang is relatively low; Meanwhile, landscape ecosystems of the counties on the Bashang have even relatively low stability. It has two respects to show: First, the benefit of output of animal husbandry', that is to say, the fluctuation rate of the output of beef and mutton in per unit area of meadow, is great; Second, fluctuation rate of the per unit area yield of grain-production is heavy. Their values exceed threshold value of landscape stability that the threshold value is acted by the even fluctuating rate of the net primary productivities of vegetations at natural.There is a unique position characteristic in the area of Bashang in Zhangjiakou. So landscape ecological construction of this area seems particularly important. So we should change the view that economic development is the main fact, with the ecology preferential at goal, make ecological construction as primary task on the area of Bashang , work well on synthesize zoning, adjust the landscape pattern, develop ecological agriculture, drive the development of the regional economy .The innovation of the thesis is followed: (1) applying the theory of coefficient of variation to the landscape pattern and studies; (2) to study for landscape stability, including to choose landscape key element stability , to apply the index of landscape ecosystem stability, to define the stabilitythreshold value of the landscape; (3) the pattern theory of the landscape is combined organically with the stability theory of the landscape, applied to study land-use/cover change. |
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