Unit 5A Review Flashcards
(50 cards)
growth in a new area; ex. on a newly formed volcanic island
primary succession
branch of biology dealing with interactions among organisms and between organisms and the environment
ecology
all species in a given area; ex. all organisms in Flower Mound
community
process in which bacteria convert nitrogen into a form plants can use
nitrogen fixation
consists of all ecosystems of one type; ex. tropical rainforest
biome
term that means nonliving
abiotic
organism that eats consumers
carnivore
limiting factor whose effect is the same regardless of population size
density independent
examples of density independent limiting factors
earthquake, drought, severe frost, fire
symbiotic relationship in which one species benefits, but the other is harmed
parasitism

the original source of energy in most ecosystems
sunlight

rapid increase in population numbers due to unlimited resources
exponential growth

symbiotic relationship in which both species benefit
mutualism

term that means living
biotic
combined portions of Earth in which all living things exist
biosphere
organism that eats producers
herbivore

symbiotic relationship in which one species benefits, and the other is unaffected
commensalism

limiting factor whose effect increases with population size
density dependent
examples of density dependent limiting factors
disease, parasitism, emigration, competition
“job” of an organism in the environment
niche
organism that eats both producers and consumers
omnivore

each step in the transfer of energy and matter within a food web
trophic level

growth in an area has been disrupted and begins again; ex. on an abandoned field
secondary succession
What happens to the energy that is not passed to the next trophic level?
released as heat







