Comparison of the predictive performance of statistical models relating dominant species distributions to environment, averaged for the beach species in a local scale.

*Mean and SE estimated within model building. Values indicate the cross-validated unexplained and % explained deviances, and the cross-validated correlation (cvCor) and the standard errors (se).
Estimates of predictive performance were calculated using 10-fold cross validation and a tree complexity of 3. Learning rate (lr), the number of trees (n.trees), and the number of positive observations (pa) are shown. Environmental variables tested in the final model are showed in Table 4. Beach species included in the final model: Bathyporeia pelagica, Donax trunculus, Eurydice affinis, Eurydic pulchra, Pontocrates arenarius, Scolelepis squamata, Sphaeroma rugicauda, Talorchestia brito and Talitrus saltator.