This document discusses population distribution patterns of organisms. It identifies three main types of dispersion: clumped, uniform, and random. Clumped dispersion occurs when individuals are concentrated in specific habitat areas, such as family groups or limited seed dispersal. Uniform dispersion happens when individuals are evenly spaced due to competition, like seabirds nesting or plants producing toxins. Random dispersion is the least common and hardest to observe, with individuals spaced unrelated to each other.

1. PATTERN OF DISTRIBUTION OF
ORGANISMS
By: Atikah
15.6 QUANTITATIVE ECOLOGY

2. Population density is the number
of individuals of a species per
unit area or volume at given time

3. Types of dispersion
 Random
 Clumped
 Uniform

4. POPULATION DISTRIBUTION

5. Clumped
 Also called aggregated distribution or
patchiness.
 Occurs when individuals are
concentrated in a specific area of the
habitat.
 For example, occurs in animals
because of family groups and pairs and
among plants because of limited seed
dispersal or asexual reproduction.

6. Uniform
 Occurs when individuals are evenly
spaced.
 Seabirds place their nest at an equal
distance from one another.
 Uniform dispersion occurs when
competition is severe.
 For example, when leaves or roots of a
plant produce toxins that inhibit growth
of plant nearby or when animals
establish territories.

7. Random
Occurs when the individuals in a
population are spaced in a manner
unrelated to the presence of others.
This kind of dispersion is least common
and is the hardest to observe in nature.