Ecosystems Flashcards
ecosystems
community of living org and non-living (phy and chem) components in a specific habitat which interact. they are dynamic and range in size
population
group of indiv of same species which live in a partic area at any one time and can breed together
community
pops of diff species which live in the same place at the same time and interact w/each other
dynamic ecosystems
comm of living things interact w/each other and w/their physical env so any small changes in either affect the other
constantly changing
what influences ecosystems
biotic and abiotic factors
niche
role of org in its ecosystem
feeds, excretes, habitat
impossible for two species to occupy exactly same niche
environment
range of external conditions in which an org lives
diff bw energy and matter
matter recycled
energy transferred
biotic factors
living factors that determine conditions 4 distrib and abundance of orgs
predation, food supply, disease
abiotic factors
non-living factors that det cond 4 distrib and abundance of orgs
light, temp, water av, wind, soil, shape of land-slpoe
light intensity as an abiotic facor
photo- LDR
larger leaves
pig which req less light
temp as an abiotic factor
enx controlled metabolic reactions
plants and ectotherms dev rapidly when warm, endo less affected
seasons-migration, leaf fall, flowering
water av as an abiotic factor
stress, death, wilt, req for turgidty-upright-cell wall guard cells, photolysis
oxygen av as an abiotic factor
aquatic ecosystems need cold fast flowing water- high conc to prev suffocation
soil as an abitoic factor
type- partile size aff org to live
pH-enz, nit fixing
