LECTURE 10 -> ENERGY FLUX Flashcards
1
Q
Define standing crop
A
bodies of biomass in an area
2
Q
Define biomass
A
mass of organic organisms in an area
3
Q
Define primary productivity
A
rate biomass is produced vis photosynthesis
- > net is the difference of total productively - whats lost in respiration
- > carbon/m^2/t
4
Q
Define secondary productivity
A
rate of production of biomass by heterotrophs
5
Q
geographic productivity trends
A
highest on land, near the tropics
6
Q
Limiting factors of NPP on land
A
- > water } positive linear
- > temperature } increases with growing season length
- > solar radiation } mostly positive linear
- > nutrence
- —>in tropics, p-limited
- ———-> Young soil, more P, why closer to the caps, n-limiting
7
Q
Limiting factors of NPP in oceans
A
- > temp } more NPP in cold water
- >low c:N ratio (algae don’t have carbon structures)
8
Q
to find energy transfer
A
CE X AE X PE = Trophic e transpher
- > C= consumption, % avalible to next consumer
- > A = assimilation, % that is available for work/growth
- > P = production, % of AE incorporated into biomass
9
Q
Decomposition comprises of
A
MINERLIZATION
-> the break down of organic matter, leading to CO2 and E release
