A generalized standardization procedure in ecological ordination: tests with principal components analysis.
作者： Branko Karadži , Ranka Popovi
DOI: 10.2307/3236158
关键词:
摘要: . Standardization by norms of sample position vectors as well totals has been used frequently in vegetation ecology. Both standardizations are only special cases the Generalized Procedure (GSP) described this paper. The general procedure allows a wide choice data transformations simply varying values single standardization parameter. Principal Components Analysis (PCA) often involutes opposite ends coenospace, producing results that may be difficult to interpret. Experiments with simulated field sets revealed involuted gradients can unfolded if GSP is applied prior PCA. Compared Correspondence Analysis, GSP-PCA was superior recovering structure analysed coenoclines.
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