The effect of scale, climate and environment on species richness and spatial distribution of Finnish birds.

The article discusses a study which estimated the species richness from climate and environmental variables across spatial scales using 10-kilometer grid data from Finnish Bird Atlas. Ordinary least squares (OLS) linear-regression model with a quadratic error function was used to estimate the occurring number of bird species. The study found that the length of the growing season with R squared values is the best estimator for avian species richness in Finland.