Bio: Ecology Test Flashcards
Ecology is the study of…
relationships between living organisms
abiotic
non living
biotic
living
what separates ecosystems from community?
abiotic factors
in a food web, the energy ingested by the organism is lost by…
energy
autotroph=
producer
heterotroph=
consumer
producers are…
organisms that create + supply food
consumers
eat living organisms for energy
what do arrows in a food web represent
energy
where does all of the energy in a food web come from?
the sun
predator/prey
(+/-)
competition
(+/-)
mutualism
(+/+)
commemsalism
(+/0)
parasitism
(+/-)
evaporation
goes into air
transpiration
comes from trees
condensation
comes from atmosphere
precipitation
falls from atmosphere
runoff
run down land like a stream usually into water source
infiltration
seeps into ground
what are three major areas where carbon is stored
sediment, ocean, atmosphere
how can carbon move from biotic to biotic
consumption
how can carbon move from abiotic to biotic
photsynthesis
where does most nitrogen exist on earth
atmosphere
what organism fixes nitrogen so plants can use it
bacteria
what two major factors are biomes controlled by
temp + precipitation
which biome has modst biodiversity
tropical rainforest
which biome is coldest
tundra
which biome is warmest
subtropical desert
which biome has largest range of rainfall
tropical rainforest
carrying capacity
number of organisms or people an area can sustain
how can you increase carrying capacity
increase resources
density independent examples:
natural disasters, pollution, severe weather
density dependent examples:
predation, disease, competition
primary succesion
no soil, when new patch of land is created or exposed
secondary succesion
soil remains, community is impacted by disturbance, doesn’t have to start all over
pioneer species
first species to arrive after succesion
climax
final ecosystem after succession, usually dominant tree species
