Using two data frames for a PCR in R

I am a biologist and I did research on biodiversity on several locations. Moreover, I measured environmental variables in those plots. Normally, I would analyse this data in Canoco5, however, I am trying to learn R as well. My data frames look like this:

          Arthopleidae Baetinae Cloeninae Caenidae etc.
Location_1           0        3        16        0
Location_2           0        0         0        5
Location_3           0        1        40        0
Etc.

And:

                    pH  Temperature Vegetation etc.
Location_1         8.22       28.06          0
Location_2         8.15       28.95         30
Location_3         8.29       28.75          0
Etc.

I cannot find a package which is suitable for this kind of analysis. What would you reccomend?

Thanks in Advance!