Abstract: With the altitude, slope, aspect, and Normalized Difference Vegetation Index (NDVI) as the landscape variables of topography and vegetation, this paper studied the scale dependency of topographyvegetation relations in Wuyi Mountain Nature Reserve. Different scale variograms of topographic factors and NDVI were established by wavelet transform, and the correlations between the topographic factors and NDVI were analyzed by using wavelet coefficients. In the study area, there existed at least two distinct scale patterns of topographical factors and NDVI.
The nearly synchronous in scale domain, especially in small scale domain, suggested that there was a tightlycoupled relationship between topographic factors and NDVI. The topographyvegetation relations were scale dependent, and the correlation coefficients of NDVI and topographical factors were larger in larger scales than in smaller scales, suggesting that topographical factors played important roles in controlling NDVI patterns in larger scales. The relationships of NDVI with slope and aspect showed a large and complicated variation with s
patial scale. This study could help to the understanding on the multi-scale complicated correlations between topography and vegetation in the Reserve, and indicated that wavelet transform was useful in exploring the multi-scale spatial pattern of natural resources.

Key words: Soil organic P, Research advance