ecosystem Flashcards
primary producer bring ____ into all ecosystems
energy
define limiting factor
any resource that is the first to run out and limit primary productivity in an environment
(t/f) climate differences can make a difference in annual primary productivity
true
marine & aquatic ecosystems change with ___
depth
direct correlation between primary productivity and herbivore productivity is called?
bottom up control of food webs
in an ecosystem, most ____ is used or lost to the environment
energy
green world hypothesis?
predators keep herbivores populations in check so that they don’t consume all the plants - many herbivores can eat producers as fast as they can reproduce in marine ecosystems
what are the 2 food chains?
grazing and detrital
what are decomposers responsible for?
releasing nutrients and energy back into ecosystem
how dependent the ecosystem is on decomposers depends on?
the ecosystem and how much input from surrounding ecosystem
explain forest ecosystems
they are unavailable to herbivores and therefor dependent on decomposers
explain clear cutting
harms forest & takes years to recover, nutrient availability decreases
explain terrestrial ecosystems
- usually defined by the dominant plant type
- trends are called biomes
as temp changes, ____
ecosystem changes
(t/f) secondary productivity also changes along with primary producers as temp changes
true
