Ecosystems Flashcards
(28 cards)
what is an ecosystem
all of the organisms in an area including abiotic factors
ecosystem =
biotic + abiotic
trophic levels
producers, primary, secondary, and tertiary consumers
food chain example
grass to grasshoper to bird
what is a food web
a complex web of multiple food chains connected
how much energy is transferred between each level of the trophic pyramid
10%
ecosystems are self
sustaining
all matter stays
in the ecosystem
if a cat eats a mouse that has 10 kcalories, how much energy is transferred to the cat?
1 kcal
what are autotrophs
organisms that produce their own food
are all producers autotrophs?
yes
are all heterotrophs consumers?
yes
what is a trophic cascade
how organisms affect the other organisms in the ecosystem
a direct effect is represented by
a solid arrow
an indirect effect is represented by
a dashed arrow
a negative effect is shown by
a negative symbol
a positive effect is shown by
a positive sign
organisms can exist at
multiple trophic levels
energy can be stored, converted, and
transferred between organisms
is a hawk a heterotroph or autotroph
heterotroph
what is a carnivore
an organism that eats only meat
what is an omnivore
an organism that eats both plants and meat
what is an herbivore
an organism that eats only plants
herbivores are
organisms that are primary consumers only
