ecology Flashcards
what is diversity
diversity is the # different species in an ecosystem
why is diversity a good thing
more diversity=heathlier ecosystem because
~more types of organisms=more likely that one will survive a disaster
what are biotic factors
all living components of a ecosystem
what are abiotic factors
all non living components of an ecosystem
what is a population
group of same species in the same area
what is a species
all organisms that can breed and produce fertile offspring
what is a community
a community is all of the populatiosn in one ecostysten
what is an ecosystem
community plus the nonliving things
biome
group of similar ecosystems
biosphere
all parts of eearth
what are the 3 types of relationships
preditation, competition, symbiotic relationships
what is preditation
organisms kills and eats the other
what is compettion
2 organisms need the same resources
3 types of symbiotic relationship and definition of symbitoc relationship
paratism,mutualism,commensilism, and a symbiotic relationship is when two organisms live close to each other
defihne paratism
when one organism benefits from and harms another. (parasite)
define mutualism
2 organisms benefit from each other
define commensilism
one organism benefits and nothing happens to the other
what is a trophic level
group of organisms whose nrg source is the same # of steps away from the sun
all trpphic levels
1.producers
2.primary consumers
3.secondary consumers
4.tertiaty consumer
5.decomposers
what are autotrophs
organisms that make their own food
what are heterotrophs
organisms that need to obtain food
what three things do ecological pyramids show the distribution of
energy,biomass, and numbers of organisms
why is energy lost between trophic levels
use of nrg is converted to heat which is lost to the atmosphere
what part of your energy is passed on to what eats you ?
the stuff used to mkae more you(fat, growth,etc)
