In my case, I grew up in cow country and now I eat a lot of bison.
But generally speaking, there are a number of environmental restoration groups across the country that conduct research and publish their findings. Some are more prolific than others. Bison are the most heavily studied in this regard, but there is similar research related to seals, salmon, condor, and other keystone species.
If you're interested in researching this...do as much research as you can in the next few days as it's very likely that the current administration will try to censor it by the end of the month.