Global productivtiy paper Flashcards
Gros primary productivity is a measure of photosynthetic .. fixation
CO2
Net primary productivity measures GPP against .. respiration
autotrophic
- aka light using organisms
- normally measured 1 year apart via biomass difference
Net ecosystem productivtiy is NPP - … respiration
heterotrophic
-eneryg from tohers
Net biome production is NEP - ..
disturbance
Biomass = the sum of NPP - .. loss
litterfall
ATP and NADPH are used to .. biomass from CO2
synthesise
over a year .. of the biomass fixed via GPP is lost via respiratory processes, not including ..
half, photorespiration
biomass is key product of NPP and is a source of .. consumer consumption
secondary
can measure NPP globally by measuring .. and .. changes
CO2, O2
- calculate for global biomass
- doesn’t count literfall, herbivory, root exudates or saprotrophy
NPP = … biomass x .. efficiency x light
photosynthesis, growth
The Eutophic zone is the depth in which there is sufficient .. for photosyntehsis
light
quantum factors of growth activity also include .., …, .. and low ..
temperature, nutrients, drought, humidity
land measurements using red and infra red light can calculate leaf ..
intensity
blue light can calculate phytoplankton .. and depth of eutophic zone
chloroplasts
terrestrial NPP is x.. of oceans [per area unit]
3
total difference in NPP between oceans and terrestrial is … however
minimal
- 60 terrestrail
- 65 oceans
high npp in costal areas ..-..% pof total oceanic
14-30%
land NPP highest at .. and rainforests
tropics
rainforest precipitation is .. myr-1
1500
-temperature 22-26
seasonal temperature variations .. NPP
reduce
a 1% reduction in precipitation in Zaire results in a ..% reduction in NPP
1
in europe NPP reduced 4% by each ..C change of tmeperature
1
tropical pacific ocean NPP = tropical rain forests
…pg year
20
burning fossil fuel and deforestation releases ..pg atm
9
heterotrophic respiration is .. ocaen .. land
11pg, 5pg
soil erosion due to disturbance results in ..-..% emissions deu to climatic fluctuation
20-30
thermocline is a .. ocean layer
mixed
-absence of this would cause atmopsheri CO2 t be 200ppm higher than present
solubility pumps in ocean accounts for ..-..Gt of human emissions
2-3
solubility greatest in .. water at .. latitudes
cold, high
-water sinks moving CO2 deep
ocean currents move . water to tropics
cold
dissolved CO2 is ..% inorganic CO2 in oceans
bicarbonate .., carbonate ..%
1
91
8
dissolved CO2 is ..% inorganic CO2 in oceans
bicarbonate .., carbonate ..%
1
91
8
200 global PGC atmospheric increase increases co2 by .. ppm and temperature by .C
100, 1
200:100:1 ratio
LUC released ..PgC to atmosphere, and fuel emissions another .. over last 100-200 years
200, 300
total 500
-natural C reserves shelter full effect of these however
If atm CO2 was doubled NPP would be increased by ..%
20
if LUC was reversed today global temperatuers would reduce ..C
0.4
Total deforestation adds up to ..PgC atmosphere, 2c warming
400
..-..% brazil fuel is petrol
20-25
22% global reudce in enthanol would reduce fossi ldissolved by 0.35pgc
with 0.0007C cooling
wheat is ..% as effienct as ethanol for fuel
50%
-would need 75 UK not viable
