Figure 1.
Land-use map of the landscape mosaic.
Map showing the 16 forest fragments of Atlantic Forest and the fragment surroundings. Coordinates are in UTM system (22 J).
Table 1.
Description of environmental variables and XY coordinates.
Figure 2.
Diagram of the statistical steps.
Diagram of the different data sets used and the analytical steps performed with respect to the four predictor data matrices. Varpart = variation partitioning. NS = not significant. PCNM = principal coordinates of neighbor matrices. Analysis initiated by performing a selection of variables from each data matrix. The selected variables were grouped in a unique data matrix, which was subjected to a variation partitioning method to separate the influence of space and environment. Finally, the environmental and spatially structured environmental portion of variation was subjected to the variation partitioning to separate the unique and joint effects of environmental variables on metacommunity structure.
Table 2.
Values of correlation coefficients between surrounding land-uses of forest fragments qualitatively measured in the field and the first PCA axis based on a product moment resemblance measure between variables.
Table 3.
Variation partitioning of environmental and spatial effects on web-spider metacommunity composition.
Figure 3.
Variation partitioning of environmental variables.
Venn diagram showing the results of the variation partitioning procedure carried out on the forward selected environmental variables coupled with a common variation explained by spatial variables (fraction [a+b]).