His official title would have been the Chancellor of the German Reich, but what he was mostly known as, probably what you’re looking for, would be the German Führer. Führer translates to Leader or Guide.
If there was a sudden, significant event in the area (such as a volcanic eruption) then a population with higher biodiversity is more likely to contain at least 1 species which will be adapted enough to survive in the changed environment than an area with lower species diversity.<span />
The position of a place in relation to other places is generally called its "location", since it is only possible to find the location of something by using other locations as "points of reference".
Just talk to him and show that you care