Ecological Relationships
when one organism eats another organism
variety and variability of organisms on Earth
Biodiversity
a method of estimating the total number of individuals based on the count from one specific area
Plot sampling
organisms have a survivorship rate that remains relatively equal over their life span
Type 2 Curve
when 2 organisms fight for he same resources
competition
What are the 3 types of biodiversity
genetic, species, ecosystem
the number of organisms
population
the death rate is low until late in life, most organisms survive to reproduce (humans are an example)
Type 1 curve
both organisms benefit from the relationship
mutualism
a species that has a large effect on a community
Keystone species
the 3 types of population density examples
clumped distribution, near-uniform distribution, random distribution
Can you explain the difference?
organisms have a very high birth rate and a high death rate soon after birth
type 3 curve
When one organism benefits and the other is harmed
Parasitism
an event of intense environmental stress that occurs over a relatively short time period and causes a large change
ecological disturbance
the movement of individuals in and out of a system (2 words)
immigration and emigration
a limiting factor that is affected by the number of organisms in the area
Density dependent factors: competition, parasites and pathogens, and predation
one organism benefits and the other is not harmed
commensalism
Describe the difference between primary and secondary succession
primary: takes place where no life has been, barren habitat lacking soil
secondary: a disturbed area that is recovering from a major change
the theoretical growth rate of a population
biotic potential
the density of an organism does not affect the likelihood of population isses
density independent factors: natural disasters, weather, human impact