Ecology Flashcards
system of living organisms function together in a unit
Ecosystem
created by a living thing, organisms affects the life of another organisms
Biotic factor
non-living chemical or physical factor in the environment
abiotic factor
a living thing that can react to stimuli, reproduce and grow
Organism
closely related organisms similar to each other.
species
group of organisms of one species that interbreed and live in the same place.
population
interacting group of species
community
place where an organism lives.
habitat
Only organisms best adapted live.
natural selection
enhance survival , repruduction is more succesful
evolution
organisms capable of synthesizing own food from inorganic resources.
producers/autotrophs
organisms that can not make its own food. takes in food from organic substances.
consumers/heterotrophs
herbivores that feed on autotrophic plants. which produce own food through photosynthesis.
Primary consumer
organisms, primary animals that eat primary consumers, carnivores and omnivores.
Secondary consumer
carnivore only feeds on secondary consumers
tertiary consumer
feeds on plants
herbivore
feeds on flesh
carnivore
eats both plant and animals
omnivore
decomposes organic material
decomposer
series of organisms each dependent on the next source of food
food chain
the system of interlocking and interdependent food chains
food web
a graphical model of energy flow in a community
energy pyramid
combined:photosynthesis, decomposition, respiration
carbon cycle
continuous series of natural processes by which nitro passes from air to soil to organisms back to air or soil
nitrogen cycle