Program CANOCO Version 4.0 September 1997 - written by Cajo J.F. Ter Braak Copyright (c) 1988-1997 Centre for Biometry Wageningen, CPRO-DLO Box 100, 6700 AC Wageningen, the Netherlands. CANOCO performs (partial) (detrended) (canonical) correspondence analysis, principal components analysis and redundancy analysis. CANOCO is an extension of Cornell Ecology program DECORANA (Hill,1979) For explanation of the input/output see the manual or Ter Braak, C.J.F. (1995) Ordination. Chapter 5 in: Data Analysis in Community and Landscape Ecology (Jongman, R.H.G., Ter Braak, C.J.F. and Van Tongeren, O.F.R., Eds) Cambridge University Press, Cambridge, UK, 91-173 pp. *** Type of analysis *** Model Gradient analysis indirect direct hybrid linear 1=PCA 2= RDA 3 unimodal 4= CA 5= CCA 6 ,, 7=DCA 8=DCCA 9 10=non-standard analysis Type analysis number Answer = 2 *** Data files *** Species data : GRID_SPE.DTA Covariable data : Environmental data : GRID_ENV.DTA Initialization file: CANOCO.INI Forward selection of envi. variables = 0 Scaling of ordination scores = 1 Diagnostics = 1 File : GRID_SPE.DTA Title : 20 X 20 vegetation samples of wetland KOOLMANSDIJK (ter Braak & Wiertz 1994) Format : (I5,8(I5,F4.0)) No. of couplets of species number and abundance per line : 8 Sample 1 to be omitted Sample 2 to be omitted Sample 3 to be omitted Sample 4 to be omitted Sample 5 to be omitted Sample 6 to be omitted Sample 7 to be omitted Sample 8 to be omitted Sample 9 to be omitted Sample 10 to be omitted Sample 11 to be omitted Sample 12 to be omitted Sample 13 to be omitted Sample 14 to be omitted Sample 15 to be omitted Sample 16 to be omitted Sample 17 to be omitted Sample 18 to be omitted Sample 19 to be omitted Sample 20 to be omitted Number of samples 20 Number of species 100 Number of occurrences 1572 File : GRID_ENV.DTA Title : 5*4 gridcells, 4 strips, 2 years, pH/waterd KOOLMANSDIJK (ter Braak & Wiertz 1 Format : (I3,3(I3,F3.0),I3,F6.0,2(I3,F5.0)) No. of environmental variables : 30 No interaction terms defined No transformation of species data No species-weights specified No sample-weights specified Centering/standardization by species = 1 Centering/standardization by samples = 0 No. of active samples: 20 No. of passive samples: 0 No. of active species: 79 Total sum of squares in species data = 444.600 Total standard deviation in species data TAU = .530464 1 **** Correlation matrix **** SPEC AX1 1.0000 SPEC AX2 .3197 1.0000 SPEC AX3 -.1022 .0000 1.0000 SPEC AX4 .0580 .0000 .0000 1.0000 ENVI AX1 .9183 .0000 .0000 .0000 1.0000 ENVI AX2 .0000 .0000 .0000 .0000 .0000 .0000 ENVI AX3 .0000 .0000 .0000 .0000 .0000 .0000 .0000 ENVI AX4 .0000 .0000 .0000 .0000 .0000 .0000 .0000 .0000 pH88 .9183 .0000 .0000 .0000 1.0000 .0000 .0000 .0000 SPEC AX1 SPEC AX2 SPEC AX3 SPEC AX4 ENVI AX1 ENVI AX2 ENVI AX3 ENVI AX4 N name (weighted) mean stand. dev. inflation factor 1 SPEC AX1 .0000 .5444 2 SPEC AX2 .0000 .4057 3 SPEC AX3 .0000 .3126 4 SPEC AX4 .0000 .2724 5 ENVI AX1 .0000 .4999 6 ENVI AX2 .0000 .0000 7 ENVI AX3 .0000 .0000 8 ENVI AX4 .0000 .0000 28 pH88 3.8875 .1852 1.0000 **** Summary **** Axes 1 2 3 4 Total variance Eigenvalues : .250 .165 .098 .074 1.000 Species-environment correlations : .918 .000 .000 .000 Cumulative percentage variance of species data : 25.0 41.4 51.2 58.6 of species-environment relation: 100.0 .0 .0 .0 Sum of all unconstrained eigenvalues 1.000 Sum of all canonical eigenvalues .250 1 *** Sample arrangement in permutation test *** Row 1 consists of the plots: 21 22 23 24 Row 2 consists of the plots: 25 26 27 28 Row 3 consists of the plots: 29 30 31 32 Row 4 consists of the plots: 33 34 35 36 Row 5 consists of the plots: 37 38 39 40 The 20 plots are permuted using toroidal shifts assuming a symmetric bivariate autocovariance function Seeds: 23239 945 **** Summary of Monte Carlo test **** Test of significance of all canonical axes : Trace = .250 F-ratio = 5.997 P-value = .0450 ( 199 permutations under reduced model)