1
Q
what is standing crop
A
total BIOMASS of photosynthetic autotrophs at a given time
2
Q
what do ecologists use as a measurement
A
NPP
NPP is whats available to consummers
3
Q
marine ecosystems contribute ___ of the earth’s NPP
A
1/3
4
Q
what controls PP in marine ecosystems
A
light and nutrients
but nutrients control it a bit more
5
Q
how do we assess whic is the limiting nutrient?
A
nutrient enrichment experiments
6
Q
what is the impact of eutrophication on biodiversity?
A
increased algal growth & cyanobacteria
creates hypoxia and algal blooms
these destroy aquatic life creating dead zones
7
Q
best predicotr of NPP on land?
A
latitude
8
Q
3 limits of NPP on land?
A
sunlight intensity
water
nutrients
soil nutrient is often a limiting factor on land
9
Q
A
BIOL 226 FINAL
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