education

1. 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

2.  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.

3. 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.

4. 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)