chapter 42 Flashcards
ecosystem
the sum of all the organisms living in a given area and the abiotic factors with which they interact
energy _____ chemicals _____
flows …. cycle
primary production
the amount of light energy converted to chemical energy by autotrophs during a given time period
GPP gross primary production
the amount of light energy converted to chemical energy (organic molecules) per unit time
NPP net primary production
GPP - energy used for autotrophic respiration
energy per area per time
ONLY new energy, not energy was made years ago or whatever
NEP net ecosystem production
a measure of the total biomass accumulation during that time
GPP - total respiration by all organisms
eutrophication
well nourished, when fertilizers pour into a lake and encourage algae growth but hurt diversity, creates dead zones
limiting factors of aquatic PP
light and nutrients (often nitrogen and phosphorus and iron)
main factors of terrestrial PP
temp and moisture
high NPP on land
warmest and wet together
lowest NPP on land
either super dry, or dry and super cold
