The Relationship of Ecology with population dynamic

Definition of Ecology

• It deals with the relations of organisms to one

another and to their physical surroundings and

relationships between groups of living things

with their environments

• Ecology can be divided into two parts

• biotic and abiotic

Biotic components are the living things that shape

an ecosystem.

A biotic factor is any living component that affects

another organism including animals and the

living food that the organism consumes. Each biotic

factor needs energy to do work and food for proper

growth. Biotic factors include human influence.

Abiotics factors can include water, light, radiation,

temperature, humidity, atmosphere, and soil.

Types of Ecology

Population Ecology

It deals with studies of structure and dynamics of populations and its affect on

population, how and why a population varies over time. A population ecologist studies

the interrelations of organisms with their environments by analyzing properties of

populations rather than the behavior of the individual organisms.

Community Ecology

This deals with the interactions between organisms that is the feeding relationships

among species or who helps who competes with whom and for what resources and

how those interactions affect community structure.

Ecosystem Ecology

Ecosystem is a community of living organism that is animals, plants and microbes

together with abiotic components of their environment interrelating as a system.

Population Dynamics A population is a group of individuals who live together in the same habitat

and are likely to interbreed. 

Each population has a unique physical distribution in time and space.  

In entomology, a good understanding of population dynamics is useful for

interpreting survey data, predicting pest outbreaks, and evaluating the

effectiveness of control tactics.

Birth , death , immigration, and emigration are the four primary ecological

events that influence the size of a population. 

This relationship can be expressed in a simple equation

Change in

Population Density=   (Births + Immigration) - (Deaths + Emigration)