Preservationist
ahd-5
noun.
One who advocates preservation, especially of natural areas, historical sites, or endangered species.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
A person who
advocates
for the
preservation
of natural or man-made landmarks.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
someone who advocates the preservation of historical sites or endangered species or natural areas
Word Usage
"One only need look at Amboseli National Park in Kenya to see what the "preservationist" ethic can do to an entire ecosystem."