able to tolerate only small environmental changes
found in only one or a relatively small number of habitats (MacArthur and Wilson 1960:191).
found in only one or a relatively small number of habitats (MacArthur and Wilson 1967:191).
found in only one or a relatively small number of habitats (MacArthur and Wilson 1967191). 
stenotopic 1. Able to adapt only to a narrow range of environmental conditions; a reference to a plant or an animal. 2. Describing an organism that is able to exist only in a narrow range of habitats. 3. Having a narrow range of adaptability to changes in environmental conditions.
able to adapt only to a narrow range of environmental conditions