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INDICES FOR DETECTING DIFFERENCES IN SPECIES COMPOSITION: SOME SIMPLIFICATIONS OF RDA AND CCA
Author(s) -
Palmer Michael W.,
McGlinn Daniel J.,
Westerberg Lars,
Milberg Per
Publication year - 2008
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.1890/07-0842.1
Subject(s) - canonical correspondence analysis , redundancy (engineering) , eigenvalues and eigenvectors , canonical analysis , mathematics , correspondence analysis , statistics , canonical correlation , plot (graphics) , simple (philosophy) , algebraic number , canonical form , ecology , computer science , pure mathematics , biology , species richness , mathematical analysis , philosophy , physics , epistemology , quantum mechanics , operating system
We provide algebraic simplifications for the redundancy analysis (RDA) eigenvalue and the canonical correspondence analysis (CCA) eigenvalue in the special case of permanent plots sampled twice. The indices for RDA and CCA are interrelated and are intuitively interpretable. These simplifications also apply to simple split‐plot designs and to a balanced design with two independent samples.