Ecology Flashcards
The study of living things and how they interact with their environment
Ecology
What are the levels of ecological organization?
Organism -> Population -> Community -> Ecosystem -> Biome -> Biosphere
All living things
Biotic factors
the number and variety of species within an ecosystem
Species diversity
non-living things
Abiotic factors
sun provides energy
radiation
radiation warms the Earth’s surface
temperature
presence of gases – O2,
CO2, N2 and water vapor
atmosphere
caused by the differences in
temperature and rainfall, disperses pollen and seeds; produces water current
wind
required for all of life
water
quality of soil in an area
influences the kinds of plants that grow
there.)
soil
temperature, sunlight,
atmosphere/precipitation are important
components of a climate
climate
ability of the ecosystem to support
organisms
Carrying capacity
anything that limits the survival of organism
Limiting factor
range of values that is needed for
organism survival
Tolerance range
ideal range
Optimum range
movement of animals into an ecosystem
Immigration
movement of animals out of ecosystem
Emigration
ability to withstand and recover from changes
Stability
make their own food
Autotrophs (producers)
Two types of autotrophs
Photoautotrophs and chemoautotrophs
unable to make their own food
Heterotrophs (consumers)
heterotrophs who eat plants
herbivores
heterotrophs who eat meat
carnivores
heterotrophs who eat both plants and meat
omnivores
breaks down organic material
decomposers (saprophytes)
feed on detritus, dead organic materials
detritivores
single pathway transfer of energy
food chain
classification which describes its feeding
relationship to another organism
trophic level
Interrelated pathway transfer of energy
food web
Shows the number of
organism at each
trophic level, upright
number pyramid
shows the total biomass
per trophic level; upright in land, except in ocean
biomass pyramid
Biomass
living matter per
unit area
shows energy transfer from
one trophic level to the
next; upright
energy pyramid
classified by whether
they help, harm, or
have no effect on the
species involved
community interactions
both benefit (+,+)
mutualism
parasite benefits ; host is harmed (+,-)
parasitism
one organism benefits ; other unharmed (+,0)
commensalism
predator eats the prey ; Prey is being eaten (+,-)
predation
organisms compete for limited resources (-,-)
competition
animal feeds on plants without killing it (+,-)
herbivory
one organism inhibit the growth of another organism
amensalism
organism share indirect relationship to another organism
neutralism