Ecology / Communities Flashcards
Dominant species
abundant, highest biomass, powerful
Key stone
Not the most abundant (important)
Richness
number of species and abundance
Species diversity
the number of species and abundance of each species that live in a particular location.
Invasive / Introduced species
free from predators, parasites, pathogens, and free food
Ex. Brown tree snake
Factors that impact communities
Disease
Inter specific interactions
1) competition - after same resource
2) Predaition - one hunts / catches / eat anothers
3) Symbiosis - living together
4) Mutualism - EX. bees and flowers +/+ (both organisms benefits)
5) Commensalism - +/o (on benefit the other dosen’t) barnacles
6) Parastism +/- (one benefits the other harm) ticks
Mullerian
Two or more unpalatable, aposematically colored species resemble each other
Ex Bees and wasps
Batesian
Palatable/harmless species mimics an un palatable / harmful model
Ex. coral and king snake
Cryptic
Camouflage
Ex. Walking sticks and color
Aposematic
Warning color
Ex poison dart frogs, skunks, black widow
Ecological Niches
rate that the organism plays in the environment
Ex oak tree in a deciduous forest
Primary
Begun in life less area, no soil, perhaps volcanic activity or retreating glacier
Secondary
An existing community has been cleared by some disturbance that leaves the soil intact (natural disasters)
Humans
are the most widespread agents of disturbance
