two species, y and z, occupy adjoining environmental portions of land that differ in several abiotic (nonliving) factors (climate, soil). When species Y is experimentally removed from a portion of its patch species A does not successfully colonize the area. What might you conclude from these results.

They are different species

Explanation:

Could be that they look similar or that they can share similar environmental portions of land. But, if one specie has more land to colonized and do not do it, that mean that the environmental conditions are not the ideal for it like it is mention the climate (maybe hotter or cooler) or soil (it has a different pH, is lack of one esential nutrient, etc.)