System population dynamics

Now, we passed to other topic in class, and this one involves the population changes among a system.

First we looked at the factors that affect the population growth and these ones are divided into two: density dependent factors and density independent factors.

Density dependent factors
These ones depend on how dense the population is. These involves biotic factors and they are mostly part of negative feedbacks. The density dependent factors are derived into externa and internal factors.

• Internal factors: this ons involves the act within a same species. This includes food supply, territory, and density dependent fertility.
• External factors: this one involves the act within a different species. This includes predation and disease.

Density independent factors
These ones do not depend on how dense a population is, in other words, it is not related to population density. It involves abiotic factors and aren't part of a feedback system. Some examples of density independent factors are: weather, climate, volcanic eruptions, floods, between other.