Figure 1.
Global distribution of 76 sampling sites of echinoderm assemblages within the NaGISA program.
Due to the large scale of the map, spatially close sites cannot be distinguished. Boxes delineate ecoregions (see text for details).
Table 1.
List of environmental variables used in analysis.
Figure 2.
Average echinoderm abundances in ecoregions.
a. 16x intertidal collections, b. 16x subtidal collections, c. 100x intertidal collections, d. 100x subtidal collections. Numbers below ecoregions specify the number of sites included in each region. See Fig. 1 and text for ecoregions.
Figure 3.
Relative abundances of echinoderm classes in ecoregions.
a. 16x intertidal collections, b. 16x subtidal collections, c. 100x intertidal collections, d. 100x subtidal collections. Numbers below ecoregions specify the number of sites included in each region. See Fig 1 and text for ecoregions.
Figure 4.
Expected number of species (ES5) in ecoregions.
a. 16x intertidal collections, b. 16x subtidal collections, c. 100x intertidal collections, d. 100x subtidal collections. Numbers below ecoregions specify the number of sites included in each region. See Fig. 1 and text for ecoregions.
Figure 5.
Spearman rank correlations between echinoderm abundance and latitude.
Echinoderm abundances are from a. 16x intertidal collections, b. 16x subtidal collections, c. 100x intertidal collections, and d. 100x subtidal collections. See Tables 1 and 2 for correlation coefficients and significance levels.
Figure 6.
Spearman rank correlations between echinoderm species richness (based on estimated number of species ES5) and latitude.
Echinoderm abundances are from a. 16x intertidal collections, b. 16x subtidal collections, c. 100x intertidal collections, and d. 100x subtidal collections. See Tables 1 and 2 for correlation coefficients and significance levels.
Figure 7.
Spearman rank correlations between echinoderm taxonomic distinctness and latitude.
Echinoderm abundances are from a. 16x intertidal collections, b. 16x subtidal collections, c. 100x intertidal collections, and d. 100x subtidal collections. See Tables 1 and 2 for correlation coefficients and significance levels.
Table 2.
Intertidal and subtidal echinoderm assemblages from 16x quadrat collections: Spearman Rank Correlation (rho) of abundance (N), residuals of abundance regressed against number of sampling quadrats (Nresid), expected number of taxa ES5, and Taxonomic Distinctness index (Δ*) versus latitude (Lat).
Table 3.
Intertidal and subtidal echinoderm assemblages from 100x quadrat collections: Spearman Rank Correlation (rho) of abundance (N), residuals of abundance regressed against number of sampling quadrats (Nresid), expected number of taxa ES5, and Taxonomic Distinctness index (Δ*) versus latitude (Lat).
Table 4.
Spearman Rank Correlation (BEST Bio-Env analysis) between echinoderm community structure and 14 main environmental variables (see Table 1 and text for details and abbreviations).