Definitions for "Limiting Factors"
The physical needs that determine the survival of a species: temperature, water, air supply, light, food.
those conditions in a stream or ecosystem that inhibit population growth.
those things that may influence the success of an animal, its population, or its species.   These include air, water, space, food and their quality as well as predation (by humans and animals) or disease.
Chemical or physical factors that limit the existence, growth, abundance, or distribution of an organism.