Chapters 21 & 23 Flashcards
The study of a group of the same species living in the same geographical area.
Population Ecology
The number of individuals that make up a population.
Population Size
The number of individuals that live in a unit area.
Population Density
Equal to the number of births and immigration minus the number of deaths and emigration.
Rate of Growth
The spacial patterns of a population in their habitat (random, clumped, uniform).
Distribution
Factors that depend on the number of members of the population for availability.
Density Dependent Factors
Factors that do not depend on the number of members.
Density Independent Factors
Seeks to understand the complex interactions between many species in a given area.
Community Ecology
A relationship where both species benefit.
Mutualism
A relationship where only one of the species benefit but the second is not harmed.
Commensalism
A relationship where only one species benefits and the second is harmed.
Expolitation
An interaction between species where both species can be harmed.
Competition
The variety of lifeforms on earth or supported by an ecosystem.
Biodiversity
The physical environment where a species lives.
Habitat
The role a species plays in its environment.
Niche
A J-Shaped curve on a graph describing population growth is representative of what?
Exponential Growth
A S-Shaped curve on a graph describing population growth is representative of what?
Logistic Growth
Exponential Growth includes humans, bacteria, and invasive species.
True
Logistic Growth includes nearly everything (excluding: humans, bacteria, and invasive species) in an population.
True
The straight line on a graph describing population growth is representative of what?
Carrying Capacity (also referred to as k)
Carrying Capacity is the number of living organisms an ecosystem can support.
True
Natural resources have no effect on population size.
False
Species interactions can affect population size.
True
Human activity has a massive impact on population size.
True
Density Dependent factors can include food, water, and disease.
True
Density Independent factors can include weather, fire, natural disasters, and accidents
True
Symbiosis means “living together”.
True
Symbiosis can also mean mutualsim.
False (not all relationships are beneficial to both parties)
In exploritation, parasitism usually kills the host.
False, host survives
In exploitation, predation kills the host, and means they are consumed.
True
Interspecies is competition between different species, competing between resources and space.
True
Intraspecies is competition between the same species, competing between territory and reproduction.
True
The more complex an ecosystem the easier it is to destroy.
False
A healthy ecosystem is immensity biodiverse.
True
The principle that states no two species can occupy the same niche indefinitely is called what?
Competitive Exclusion Principle
When species utilize different resources or the same resource at different times or different way is called what?
Niche Partitioning
Competitive exclusion leads to niche partitioning.
True
Character displacement is differences in species adaptations and are more sever in areas where competing species overlap.
True
