May 09, 2016 · Question 1 Points 10 out of 10 When does a self limiting population such as a. Question 1 points 10 out of 10 when does a self. School University of Maryland; Course Title BIOL 103; Type. Test Prep. Uploaded By luis91084; Pages 50 Ratings 78% (27) 21 out of 27 people found this document helpful;
Feb 09, 2016 · Question 6 Points: 10 out of 10 When does a self-limiting population such as a population of large fish or mammals grow the fastest? When it is moderate in size, about half of carrying capacity. When it is low, about 10% of carrying capacity. When it is large and close to carrying capacity.
Populations Quiz Attempt 2 of 2 Started:04/28/2016 9:00 PM EDT Submitted:04/28/2016 9:05 PM EDT Score:100% Points:100 out of 100 Question 1 Points: 10 out of 10 When does a self-limiting population such as a population of large fish or mammals grow the fastest? When it is low, about 10% of carrying capacity. When it is moderate in size, about half of carrying capacity. When it is …
Sep 03, 2016 · Points: 10 out of 10 Feedback Correct Question 2 When does a selflimiting population such as a population of large fish or mammals grow the fastest? A. When it is large and close to carrying capacity. B. When it is moderate in size, about half of carrying capacity. C. When it is low, about 10% of carrying capacity. Feedback Correct.
Flows Like a River. As you can see from the explanations above, population is a not a static thing. It does not stay constant. Environmental changes and limiting factors keep the population from growing out of control, but they don't keep the population at a constant number.
Some examples of limiting factors are food, water, living space, and disease.
All populations on Earth have limits to their growth. Even populations of bunnies—that reproduce like bunnies!—don't grow infinitely large. And although humans are giving the idea of infinite growth a run for its money, we too will ultimately reach limits on population size imposed by the environment.
Examples include natural disasters like forest fires. Limiting factors of different kinds can interact in complex ways to produce various patterns of population growth. Some populations show cyclical oscillations, in which population size changes predictably in a cycle.
Density-dependent limiting factors tend to be biotic —living organism-related—as opposed to physical features of the environment. Some common examples of density-dependent limiting factors include: 1 Competition within the population. When a population reaches a high density, there are more individuals trying to use the same quantity of resources. This can lead to competition for food, water, shelter, mates, light, and other resources needed for survival and reproduction. 2 Predation. Higher-density populations may attract predators who wouldn’t bother with a sparser population. When these predators eat individuals from the population, they decrease its numbers but may increase their own. This can produce interesting, cyclical patterns, as we'll see below. 3 Disease and parasites. Disease is more likely to break out and result in deaths when more individuals are living together in the same place. Parasites are also more likely to spread under these conditions. 4 Waste accumulation. High population densities can lead to the accumulation of harmful waste products that kill individuals or impair reproduction, reducing the population’s growth.
When a population reaches a high density, there are more individuals trying to use the same quantity of resources. This can lead to competition for food, water, shelter, mates, light, and other resources needed for survival and reproduction. Predation.
Photograph of a lemming. It is a small, chubby rodent that resembles a guinea pig. Image credit: Tunturisopuli (Lemmus Lemmus) by Argus Fin, public domain. Density-dependent regulation can also take the form of behavioral or physiological changes in the organisms that make up the population.
Some undergo irregular spikes and crashes in numbers. For instance, algae may bloom when an influx of phosphorous leads to unsustainable growth of the population. Other populations have regular cycles of boom and bust.
In many cases, oscillations are produced by interactions between populations of at least two different species. For instance, predation, parasite infection, and fluctuation in food availability have all been shown to drive oscillations. These density-dependent factors don't always create oscillations, however.