Environmental resistance includes:
Environmental resistance includes both biotic limits, such as competition, predation, parasitism, and disease, and abiotic limits, such as temperature extremes, drought, disturbance, or nutrient shortage. Together these factors keep realized population growth below its theoretical biotic potential. Birth rate is a demographic rate affected by resistance, not itself a complete category of limiting environmental forces. Logistic predictions depend on assumptions that managers should not overlook. Carrying capacity changes with habitat and climate, and removing individuals may alter age structure
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 11