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 = 1 *** Data files *** Species data : iris_fl2.dta Covariable data : iris_spe.dta Environmental data : iris_flw.dta Initialization file: Forward selection of envi. variables = 0 Scaling of ordination scores = 2 Diagnostics = 1 File : iris_fl2.dta Title : Fisher's Iris data: setosa(1), versicolor(2) and virginia (3) Format : (1X,I5,(T10,14F5.1)) No. of couplets of species number and abundance per line : 0 No samples omitted Number of samples 150 Number of species 4 Number of occurrences 600 File : iris_spe.dta Title : Fisher's Iris data: setosa(1), versicolor(2) and virginia (3) Format : (I5,8(I5,F4.0)) No. of covariables : 3 No interaction terms defined ****************************************************************************** Names of covariables ****************************************************************************** setosa versicol virginic ****************************************************************************** File : iris_flw.dta Title : Fisher's Iris data: setosa(1), versicolor(2) and virginia (3) Format : (1X,I5,(T10,14F5.1)) No. of environmental variables : 4 No interaction terms defined No transformation of species data No species-weights specified No sample-weights specified Centring/standardization by species = 1 Centring/standardization by samples = 0 No. of active samples: 150 No. of passive samples: 0 No. of active species: 4 Total sum of squares in species data = 681.371 Total standard deviation in species data TAU = 1.06565 Covariable virginic is linearly dependent, hence ignored ****** Check on influence in covariable/environment data ****** The following sample(s) have extreme values Sample Environmental Covariable + Environment space variable Influence influence influence 42 2 6.5x 99 3 5.1x 107 1 6.4x 119 3 5.8x 135 4 5.6x ****** End of check ****** 1 **** Correlation matrix **** SPEC AX1 1.0000 SPEC AX2 .0000 1.0000 SPEC AX3 .0000 .0000 1.0000 SPEC AX4 .0000 .0000 .0000 1.0000 ENVI AX1 1.0000 .0000 .0000 .0000 1.0000 ENVI AX2 .0000 1.0000 .0000 .0000 .0000 1.0000 ENVI AX3 .0000 .0000 1.0000 .0000 .0000 .0000 1.0000 ENVI AX4 .0000 .0000 .0000 1.0000 .0000 .0000 .0000 1.0000 Seplengt -.9545 .0320 -.2890 -.0667 -.9545 .0320 -.2890 -.0667 Sepwidth -.6285 -.7547 .1250 .1407 -.6285 -.7547 .1250 .1407 Petlengt -.8866 .3130 .3181 .1218 -.8866 .3130 .3181 .1218 Petwidth -.5125 -.2213 .5501 -.6211 -.5125 -.2213 .5501 -.6211 SPEC AX1 SPEC AX2 SPEC AX3 SPEC AX4 ENVI AX1 ENVI AX2 ENVI AX3 ENVI AX4 Seplengt 1.0000 Sepwidth .5302 1.0000 Petlengt .7562 .3779 1.0000 Petwidth .3645 .4705 .4845 1.0000 Seplengt Sepwidth Petlengt Petwidth N name (weighted) mean stand. dev. inflation factor 1 SPEC AX1 .0000 1.0000 2 SPEC AX2 .0000 1.0000 3 SPEC AX3 .0000 1.0000 4 SPEC AX4 .0000 1.0000 5 ENVI AX1 .0000 1.0000 6 ENVI AX2 .0000 1.0000 7 ENVI AX3 .0000 1.0000 8 ENVI AX4 .0000 1.0000 1 Seplengt 5.8433 .8253 7.5365 2 Sepwidth 3.0573 .4344 2.7409 3 Petlengt 3.7580 1.7594 46.7143 4 Petwidth 1.1993 .7597 21.6557 **** Summary **** Axes 1 2 3 4 Total variance Eigenvalues : .096 .019 .012 .005 1.000 Species-environment correlations : 1.000 1.000 1.000 1.000 Cumulative percentage variance of species data : 73.0 87.2 96.3 100.0 of species-environment relation: 73.0 87.2 96.3 100.0 Sum of all unconstrained eigenvalues .131 Sum of all canonical eigenvalues .131 The sum of all unconstrained eigenvalues is after fitting covariables Percentages are taken with respect to residual variances i.e. variances after fitting covariables *** MESSAGE *** The fit for species is additional to the fit due to covariables. With covariables, CANOCO cannot calculate residuals for samples.