apes unit 7 Flashcards
2 factors that determine biodiversity
imagration and exticntion
2 factors that determine immigration and extinction
island size and distance from the mainland
smaller islands
fewer different species because of high extinction rates
islands that are closer to the mainland
have higher immigration rates
competition
takes place when an individual attempts to use the same resource
interspecific
between different species
intraspecific
within the same species
competitive exclusion principle
the elimination of one of two different species with identical needs for resources
resource partitioning
avoiding competition for resources by using shared resources at different times
fundamental niche
the full range a population can theoretically use
realized niche
an organism actually occupies due to limiting factors and competition
spatial
different species occupy different areas
dietary
organisms separate resources by what they eat
plant height
animals separate out by height
temporal/time
eating at different times
predator/prey
-natural selection
- helps promote successful traits
predators
-attack
-camofaluge
-chemcials
prey
-defend
-run away
-camouflage
-protective covering
-mimicry
symbiosis
long term relationship between 2 species
partastims
species 1: hurt😔
species 2: helped 😀
mutualism
species 1: helped😀
species 2: helped 😀
commensalism
species 1: doesn’t care
species 2: helped 😀
native
- evolved with the ecosystem
- helps ecosystems functions
-ex: northern leopard frogs
non native/invasive
- decreases biodivertsty
- did not eveolve with ecosystem
- no predators
- globalization = spread exponeteionaly
- ex: cane toads in austrlia
indicator
- can indacate that something is disrupting the ecosystem
- ex: birds
keystone
- plays a vital role in the ecostytem
- sea otters
generalist
thrives in any condtions
ex: people
specilasit
can only live in a narrow range of conditions
ex pandas
threanted
in danger of becoming endangerd
ex: polar bears
endergard
in danger of going extinct
ex tigers
locally extinct
extinct from an area