ecological interactions and succession. interactions competition predation predator prey ...
TRANSCRIPT
ECOLOGICAL INTERACTIONS AND
SUCCESSION
INTERACTIONSCompetitionPredationPredatorPreySymbyosisMutualism: benefits both speciesCommensalism: benefits one but the other isnt affectedParasitism: benefits one, harms the other.
https://www.youtube.com/watch?v=zSmL2F1t81Q
WHAT KIND OF INTERACTION IS THIS?
Mutualism. Both are benefiting from one another.
WHAT KIND OF INTERACTION IS THIS?
Commensalism. One is benefiting while the other is unaffected.
WHAT KIND OF INTERACTION IS THIS?
Competition. They are going after the same food source.
WHAT KIND OF INTERACTION IS THIS?
Parasitism. One is benefiting while the other is being harmed.
WHAT KIND OF INTERACTION IS THIS?
Predation. One organism is being consumed by another.
POPULATION GROWTH AND DECLINEPredator-Prey interactions affect the population size, EX. Wolves and Moose
Wolf Population
LIMITING FACTORS
Is a factor or condition that limits the growth of a population in an ecosystem.Lack of nutrients in the soilToo much or to little rainToo many predatorsToo few prey
All of these can cause an ecosystem to become unstable and bring change.
CARRYING CAPACITY
When a population reaches a state where it can no longer grow, the population has reached its carrying capacity. Ex: Wolves and MooseEven without predators there is a limit to the number of Moose that can live in an area due to the amount of food and space.
SUCCESSION
SUCCESSION
Ever seen an old abandoned house where nature is “taking it back”.This is known as succession, a gradual change in an ecosystem in which one biological community is replaced by another. The humans have been replaced by the plants and animals that now dwell in it.
PRIMARY SUCCESSIONWhere no soil or organisms existExample: rocks after volcano erupts or glaciers
Pioneer Species – the very first organisms that inhabit an areaHow do they get there?wind, water, other organisms carry them
What are they?Lichens and moss
SECONDARY SUCCESSION
A series of changes in an area where the ecosystem has been disturbed, but the soil and organisms still existExample – tornadoes, hurricanes, fires, logging, and farmingFaster rate of succession
SUCCESSION DIAGRAM
