Populations And Communities Flashcards
What is a population?
Group of individuals of the same species living in a shared place at a specific point in time.
What do populations beneifit from?
Same ressources.
What does studying a population do?
Gives an insight on how species evolve and if they’re thriving or declining.
What is population size?
Represents the number of people it comtains.
How can the population size decrease or increase?
Death, birth, immigration, emmigration.
What are the methods of counting?
Sample area, mark-recapture.
What is population density?
The number of individuals per unit of area or volume.
What does the population density depend on?
Water, food, climate, parasites, disease, natrual and human disasters.
What is population distribuation?
The way in which indiciduals are distributed within their habitat.
What are the patterns?
Clumped, Uniform and random
What is clumped, uniform and random?
Clumped: Specices found in groups.
Uniform: Species found in equally spaced sections.
Random: Species found with no predictable pattern.
What is an ecological factor?
Aspects pf a habitat that can affect the organisms living there.
What is Abiotic? ( non-living )
A physical or chemical aspect of the environment.
What is Biotic? ( living )
An action of the living organism in a habitat.
Examples of abiotic?
Temperature, soil, precipitation, amount of light, depth, terrain, natural disasters.
