Food chain / Food web Flashcards
some _____ is lost at each trophic level
energy
the ultimate/primary source of energy is _____
the sun
a rabbit eats a carrot and a fox eats the rabbit
a. what level of consumer is the rabbit
b. what level of consumer is the fox
a. primary consumer
b. secondary consumer
if the primary producers stored 1000 units of energy, how many are stored in the tertiary consumer level
1 unit of energy
if the primary producers stored 1000 units of energy, how many have been lost by the time you get to tertitary consumer level
999 units of energy
what trophic level has the most organisms
producers
what trophic level has the least number of organisms
tertiary consumers
why would the few animals at the highest trophic level have a high concentration of a contaminant (such as pesticides) when the food they eat from other trophic levels have lower levels
biomagnification means that higher-level predators-fish, birds, and marine mammimals-built up greater and more dangerous amounts of toxic materials than animals lower on the food chains
caterpillar bird
grass mouse snake owl
grasshopper frog
a. what is the producer
b. energy flows from the mouse to the _____ and _____
c. the primary consumers are _____
d. the secondary consumers are _____
e. the owl is the secondary consumer it if eats the _____ but a teritary (third order) consumer if it eats the _____
f. as matter and energy move from grasses to owls, the amount of available energy always (increases,decreases) but the population size may increase or decrease)
a. grass
b. snake, owl
c. caterpillar, mouse, grasshopper
d. bird, snake, frog
e. mouse / bird, snake, frog
f. decreases
trophic level a
primary producers, autotrophs
10,000Kcal
trophic level b
primary consumer, heterotrophs
1,000Kcal
tropic level c
secondary consumer, heterotrophs
100Kcal
trophic level d
tertiary consumer, heterotrophs
10Kcal
the greatest amount of energy (and biomass) is _____
primary producers
