Populations Flashcards
Relations between different species
Interspecific
Relations between same species
Intraspecific
Struggle between organisms for resources to survive.
Thus can lead to one species being forced out of the habitat
Competition
Is the presence of a … of particular organisms which impacts population.
Predation
useful in identifying the species present and species distribution is the transect, together with variations, in the level of the ground.
Transects
Density calculators:
Density- Number of plants of a certain species/ Total area sampled
This pattern of rapid increase, where the maximum reproductive potential of the species is reached, the population declines in numbers.
r-selected
these species produce offspring that each have a higher probability of survival to maturity.
k-selected species
Organisms in the same environment usually occupy different areas, or ecological niches, depending on the availability of resources and competitors.
Competitive exclusion principle
Used to describe how organism functions within the given environment.
Ecological Niche
The maximum population size that an ecosystem can support without experiencing environmental degradation.
Carrying Capacity
Ecological interactions that lead to fluctuations in population size. It includes how populations of a species change in size and structure over time.
Population Dynamics
Specific measures of a population’s size or density in an ecosystem.
Abundance
Population Size
number of selected are/ size of area
X total number of quadrats
=Number of individuals
Population Density
Population size / area X total number of quadrats
=Number of individuals per M2
