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Regeneration pattern analysis of Quercus liaotungensis in a temperate forest using two-dimensional wavelet analysis

Frontiers in Biology 2009年第4期4卷 491-502页

作者： Xiangcheng MI Jihua HOU State Key Laboratory of Vegetation and Environmental Change Institute of Botanythe Chinese Academy of SciencesBeijing 100093China Key Laboratory for Silviculture and Conservation the Ministry of EducationBeijing Forestry UniversityBeijing 100083China

This paper introduces the two-dimensional(2D)wavelet analysis as a general interrogative technique for the detection of spatial structure in lattice *** 2D wavelet analysis detects components of hierarchical structure and displays the locational information of the *** and gaps of different spatial scales in graphical presentation of wavelet coefficients can be linked to the local ecological processes that determine patterns at stand or landscape *** from the 2D wavelet transform function,the calculation of wavelet variance can reduce the four-dimensional data of wavelet coefficients to a two-dimensional wavelet variance function and quantify the contribution of the given scale to the overall *** illustrate the use of the 2D wavelet analysis by analyzing two simulated patterns and identifying the regeneration pattern of the Quercus liaotungensis in a warm temperate forest in north *** results indicate that the recruitment of *** occurs in an overlapping area between the patch of adult and canopy gap at scales of 45m×45m–70m×70m and 20m×20m–30m×*** regeneration pattern of *** can be mainly ascribed to a trade-off between two ecological processes:recruitment around parent trees and the physiological light requirements of seedlings and *** results provide a general portrayal of the regeneration pattern for the dispersal-limited and shade-intolerant Quercus *** find that the two-dimensional wavelet analysis efficiently characterizes the scale-specific pattern of *** at different life-history stages.

关键词： Halo wavelet pattern analysis Quercus liaotungensis regeneration scale two-dimensional Mex-ican Hat wavelet two-dimensional wavelet analysis wavelet variance

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