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APS 124 Ecosystems, Climate & Environmental Change > Global productivtiy paper > Flashcards

Global productivtiy paper Flashcards

1
Q

Gros primary productivity is a measure of photosynthetic .. fixation

A

CO2

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2
Q

Net primary productivity measures GPP against .. respiration

A

autotrophic

  • aka light using organisms
  • normally measured 1 year apart via biomass difference
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3
Q

Net ecosystem productivtiy is NPP - … respiration

A

heterotrophic

-eneryg from tohers

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4
Q

Net biome production is NEP - ..

A

disturbance

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5
Q

Biomass = the sum of NPP - .. loss

A

litterfall

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6
Q

ATP and NADPH are used to .. biomass from CO2

A

synthesise

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7
Q

over a year .. of the biomass fixed via GPP is lost via respiratory processes, not including ..

A

half, photorespiration

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8
Q

biomass is key product of NPP and is a source of .. consumer consumption

A

secondary

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9
Q

can measure NPP globally by measuring .. and .. changes

A

CO2, O2

  • calculate for global biomass
  • doesn’t count literfall, herbivory, root exudates or saprotrophy
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10
Q

NPP = … biomass x .. efficiency x light

A

photosynthesis, growth

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11
Q

The Eutophic zone is the depth in which there is sufficient .. for photosyntehsis

A

light

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12
Q

quantum factors of growth activity also include .., …, .. and low ..

A

temperature, nutrients, drought, humidity

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13
Q

land measurements using red and infra red light can calculate leaf ..

A

intensity

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14
Q

blue light can calculate phytoplankton .. and depth of eutophic zone

A

chloroplasts

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15
Q

terrestrial NPP is x.. of oceans [per area unit]

A

3

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16
Q

total difference in NPP between oceans and terrestrial is … however

A

minimal

  • 60 terrestrail
  • 65 oceans
17
Q

high npp in costal areas ..-..% pof total oceanic

A

14-30%

18
Q

land NPP highest at .. and rainforests

A

tropics

19
Q

rainforest precipitation is .. myr-1

A

1500

-temperature 22-26

20
Q

seasonal temperature variations .. NPP

A

reduce

21
Q

a 1% reduction in precipitation in Zaire results in a ..% reduction in NPP

A

1

22
Q

in europe NPP reduced 4% by each ..C change of tmeperature

A

1

23
Q

tropical pacific ocean NPP = tropical rain forests

…pg year

A

20

24
Q

burning fossil fuel and deforestation releases ..pg atm

A

9

25
Q

heterotrophic respiration is .. ocaen .. land

A

11pg, 5pg

26
Q

soil erosion due to disturbance results in ..-..% emissions deu to climatic fluctuation

A

20-30

27
Q

thermocline is a .. ocean layer

A

mixed

-absence of this would cause atmopsheri CO2 t be 200ppm higher than present

28
Q

solubility pumps in ocean accounts for ..-..Gt of human emissions

A

2-3

29
Q

solubility greatest in .. water at .. latitudes

A

cold, high

-water sinks moving CO2 deep

30
Q

ocean currents move . water to tropics

A

cold

31
Q

dissolved CO2 is ..% inorganic CO2 in oceans

bicarbonate .., carbonate ..%

A

1
91
8

32
Q

dissolved CO2 is ..% inorganic CO2 in oceans

bicarbonate .., carbonate ..%

A

1
91
8

33
Q

200 global PGC atmospheric increase increases co2 by .. ppm and temperature by .C

A

100, 1

200:100:1 ratio

34
Q

LUC released ..PgC to atmosphere, and fuel emissions another .. over last 100-200 years

A

200, 300
total 500
-natural C reserves shelter full effect of these however

35
Q

If atm CO2 was doubled NPP would be increased by ..%

A

20

36
Q

if LUC was reversed today global temperatuers would reduce ..C

A

0.4

37
Q

Total deforestation adds up to ..PgC atmosphere, 2c warming

A

400

38
Q

..-..% brazil fuel is petrol

A

20-25
22% global reudce in enthanol would reduce fossi ldissolved by 0.35pgc

with 0.0007C cooling

39
Q

wheat is ..% as effienct as ethanol for fuel

A

50%

-would need 75 UK not viable

APS 124 Ecosystems, Climate & Environmental Change (20 decks)

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