This function extracts covariate values for species occurrences, excluding NA values.
extract_noNA_cov_values(data, covariate_layers, predictor_variables)
A data frame containing species occurrence data with covariate values, excluding NA values.
A data frame containing species occurrence data with columns x/long (first column) and y/lat (second column).
A list of raster layers representing covariates.
Variables to select from all the layers.
This function extracts covariate values for each species occurrence location from the provided covariate layers. It returns a data frame containing species occurrence data with covariate values, excluding any NA values.