Question

part 2: limiting factors
why dont all populations grow exponentially? for a population to grow exponentially, organisms need constant access to abundant resources like food, water, and shelter. additionally, the environment must remain stable, without disruptions from natural events such as forest fires, floods, or other disasters.
however, in most ecosystems, limiting factors come into play. these are environmental conditions that slow down or restrict population growth. examples include limited food supply, water shortages, disease outbreaks, predation, or disasters. limiting factors help maintain a natural balance, preventing populations from growing beyond what the environment can support.

1. what is a limiting factor?
2. what are 5 examples of limiting factors?
3. what is the limiting factor on the fish population? a lake starts with 300 fish, and the population grows to 2,500 due to abundant food, clean water, and few predators. however, fertilizer runoff from a nearby farm causes an algal bloom, which depletes oxygen in the water. many fish suffocate and the population size drops.
4. what is the limiting factor on the cactus population? a desert starts with 50 cacti, thriving due to plenty of sunlight, space, and occasional rainfall. over time, the population grows to 400. a drought hits, reducing water availability. many cacti wither and die and the population size declines.
5. what is the limiting factor on the rabbit population? a forest starts with 20 rabbits, and the population grows to 800 due to abundant food and shelter with few predators. as the population increases, competition for food intensifies. with limited resources, many rabbits struggle to find enough to eat, leading to starvation and a sharp population decline.
6. are limiting factors biotic or abiotic? why? provide examples of limiting factors to support your answer.

Explanation:

1. A limiting factor is an environmental condition that slows down or restricts population growth.
2. Five examples of limiting factors are limited food supply, water shortages, disease outbreaks, predation, and disasters.
3. The limiting factor on the fish population is the oxygen depletion caused by the algal bloom (due to fertilizer runoff).
4. The limiting factor on the cactus population is the water shortage (due to the drought).
5. The limiting factor on the rabbit population is the limited food resources (due to increased competition as population grew).
6. Limiting factors can be both biotic (e.g., predation, disease outbreaks, competition for food - these involve living organisms interacting) and abiotic (e.g., water shortages, oxygen depletion, disasters like floods - these are non - living environmental components).

Answer:

1. An environmental condition that slows or restricts population growth.
2. Limited food supply, water shortages, disease outbreaks, predation, disasters.
3. Oxygen depletion (from algal bloom due to fertilizer runoff).
4. Water shortage (from drought).
5. Limited food resources (due to competition).
6. Both biotic (e.g., predation, disease, competition) and abiotic (e.g., water shortage, oxygen depletion, disasters).