PLEASE HELP I need to know!!!?

Question

I am doing a report and it is asking me why the graph of of the population is fluctuating.

I have that it reached its carring capacity, and it became prey of new predators. I really need help and I have to get this done within the next hour, so PLEASE HELP ME!!!

Much thanks!!!

By the way it does not say what the population is, it is very general and just says that many populations follow this graph!!!

there are no labels or axes on the graph either!!! it's just a line that goes way up and starts to fluctuate

Answer 1

There are many factors that effect populations, here are a few:

Let me know if you need more information or an explanation.


1. Natality (birthrate) is low at low population densities because of problems associated with low densities, e.g., finding mates, increases as population increases, peaks and finally declines as intraspecific competition increases, e.g., competition for food.

2. Predation increases with increasing host (herbivore) density, then declines as host populations overwhelm (and escape) their regulating influence. This occurs because the characteristic pattern is for overall predator response to be sigmoid, based on a) functional response of the individual predator and b) numerical response of the population.

3. Intraspecific competition increases with increased population (prey) density. This produces additional mortality as natality shows a down-turn. Other density-dependent mortality and stress also comes into play producing a marked increase in combined mortality

Answer 2

Could be a preditor / prey fluctuation:
As predation increases, population drops.
At a certain level, preditors die off.
Population rises, preditors follow, cycle continues.

Answer 3

what are the labels on the axes of the graph?