Environmental Determinants Influencing Seasonal Variations of Bird Diversity and Abundance in Wetlands, Northern Region (Ghana)

Table 3

(a) Summary of CCA axis lengths for birds, showing the levels of correlation between axes and environmental gradients, percentage variance of species, and species-environment relationships (wet season). (b) Summary of CCA axis lengths for birds, showing the levels of correlation between axes and environmental gradients, percentage variance of species, and species-environment relationships (dry season).

(a)

	Axis 1	Axis 2	Axis 3
Canonical eigenvalues for bird species	0.163	0.143	0.078
Pearson correlation species-environmental scores	0.722	0.795	0.558
Kendall rank correlation sp-env’tal scores	0.430	0.523	0.320
Cumulative percentage variance	5.54	10.39	13.05
% variance explained	5.54	4.85	2.66
Number of sites = 30
Number of species (response variables) = 25
Number of environmental variables = 3

(b)

	Axis 1	Axis 2	Axis 3
Canonical eigenvalues for bird species	0.29	0.16	0.10
Pearson correlation sp-environmental scores	0.86	0.65	0.61
Kendall rank correlation for sp-env’tal scores	0.58	0.64	0.63
Cumulative percentage variance	8.97	14.1	17.2
% variance explained	8.96	5.09	3.14
Number of sites = 30
Number of species (response variables) = 25
Number of environmental variables = 3