By using RS and GIS techniques, PPU(Patch Per Unit) and SqP(Sq)(Square Pixel), the two new landscape metrics proposed by Frohn (1998), were utilized in dynamic analyses on vegetation pattern of Zhangye Oasis and proved to have favorable applicability and sensitivity in temporal landscape pattern analyses. It was demonstrated that the new metrics had similar transformation trends and statistical dependence for temporal landscape pattern analyses by comparison with the traditional landscape metrics (Contagion and Fractal Dimension). It was also found that PPU and SqP(Sq) showed more sensitivity than the traditional ones because of their higher coefficient of variation, thus the new metrics were provided with better predictable ability and sensitivity for landscape fragmentation and patch shape complexity, and had advantages in distinguishing the patch types comparing to Contagion and Fractal Dimension. Computation on new landscape metrics and dynamic analysis of landscape metrics behaviors for these time series images clearly revealed the general evolution trend of the oasis from fragmentation to contagion with the gradual enhancement trend of the spatial heterogeneity and patch shape complexity.
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