MATERIALS AND METHODS--Study Area--The SPMR is one of the two riverine systems that cross the SMO from east to west.
With the exception of site 4, located on the Lajas River, a tributary, all sites were on the SPMR itself.
They represent 87 and 39%, respectively, of the species so far recorded for the SPMR basin (49 volant and 46 nonvolant species, Lopez-Gonzalez et al., 2014).
We found the opposite pattern in the SPMR, where results suggest that there are proportionally more species of rodents able to use resources throughout the river basin than there are bats.
In this scenario, mammal species that otherwise would be confined to one vegetation association can occur in more than one at the SPMR, probably tracking specific resources that are able to occur in more than one plant association along the elevational-vegetational gradient.