Primary Productivity

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primary productivity

rate that solar energy is converted into organic compounds via photosynthesis over a unit a unit of time

units

kcal/m2/yr

high PP

ecosystems with high PP are usually more biodiverse

calculating PP

NPP=GPP-RL

NPP (net primary productivity)

the amount of energy (biomass) left over for consumers after plants have used some for respiration

RL (respiration loss)

plants use up some of the energy they generate via photosynthesis by ding cell. respiration 

GPP (gross primary productivity)

total amount if light that plants capture and convert to energy (glucose) through photosynthesis

ecological efficiency

portion of incoming solar energy that is captured by plants and converted into biomass (NPP)

how much incoming sunlight is captured and converted to GPP

1 percent

how much of the 1% that is converted into NPP

40% of the 1% convert into biomass

more productive the biome is…

the wider the diversity of animal life it can supporthah w

what leads to high NPP

water availability, higher temp, nutrient availability