TeXes Science Practice Test

Why does Species A not colonize the area previously occupied by Species B?

1. Species A is limited by food sources

2. Species B is larger in size

3. Species A is limited by abiotic factors

4. Species A can only survive in the presence of Species B

The correct answer is: Species A is limited by abiotic factors

Species A not colonizing the area previously occupied by Species B can be attributed to limitations imposed by abiotic factors. Abiotic factors refer to non-living components of an ecosystem, such as temperature, light, water availability, soil composition, and more. If these conditions do not align with the survival needs of Species A, it will struggle to establish itself in that particular environment, regardless of the biological aspects of competition or predation. In this context, the area that was previously occupied by Species B could present abiotic conditions that are unfavorable for Species A, such as differing moisture levels, soil pH, or light conditions that Species A requires for growth and reproduction. Therefore, even if there is an opportunity for colonization after Species B departs, the unsuitable abiotic conditions would prevent Species A from successfully occupying that niche. This aligns with ecological principles where the presence of a species can profoundly shape the abiotic environment, affecting the potential for other species to thrive in that area. The success of a species in a new area is heavily reliant not just on biotic interactions, but significantly on the abiotic characteristics that ensure its survival and reproduction.