The elephant population can be affected by many things. Immigration and Emigration can be big factors with the elephant population. With immigration, a group of elephants could potentially immigrate into another elephant population and increase it. They may immigrate because they want to find better resources and a more plentiful area to help sustain them. Meanwhile with emigration, elephants could move out of a population in search of better resources and could also potentially decrease the population as well.
Carrying capacity occurs when a thriving group of elephants have limiting resources, such as not enough food and water for a larger population.
In this graph, we can see how the carrying capacity for this group of elephants is 100. The reason that it is at 100 is because this is the largest that the population can get in order to sustain the elephant's resources. In the beginning the population took a while to grow due to a drought that limited their resources. Once the drought was over, they were able to thrive, survive, and reproduce more and more. However, they grew too much and reached carrying capacity. That's why their population in this one area is 100.
One example of a limiting factor caused by density dependent factors is competition among other organisms close by with food and habitats. Another example of a density dependent factor among the elephant population is the spreading of a disease that decimated the elephant population.
Some examples of density independent limiting factors are droughts and landslides. This resulted in a great loss of the elephant population, reducing their resource availability, and loss of their habitat areas.
One year the elephant population can increase tremendously. The reason of this is because there were many resources such as food, water, and habitat available for the elephants that year. With the huge supply of resources the elephant population was able to stay alive, survive, and reproduce. This resulted in a lot of births in the population.
Another year there was a decrease in the population resulting in many deaths. The population decreased because there was a natural disaster that resulted in the loss of all the elephants' resources. With the limited resources available to the elephants, the population reached carrying capacity. When they reached carrying capacity, there wasn't enough resources to help sustain the population. So as a result of this great loss of resources, there were many deaths in the elephant population that year.