Conservation is limited interaction with the natural area in question. People can go there and hike, but building on these areas is prohibited. Ecotourism is often used to promote conservation in this area as well as to fund other environmental protection policies.
Preservation is extremely limited to no access and interaction with the natural area in question. Preserving ecosystems is a common strategy in protecting endangered species of all kinds, from flora to fauna, and certain biomes as a whole so variation amongst species will stay varied.
To be added when I go home and get my abstract...