1.8 Primary Productivity Flashcards
What are primary producers?
an organism that uses energy from photosynthesis (or chemosynthesis)-plants, algae and some bacteria .
What can producers also be called? Why are they called this?
because they are capable of producing their own energy.
What is primary productivity?
its the rate solar energy is converted into organic compounds via photosynthesis over a unit of time.
Ecosystems with high PP are usually more________ then ecosystems with low PP.
Biodiversity
What are the units used for PP.
Units= kcal/m^2/yr
What is the equation for calculating Net Primary Productivity.
NPP=GPP-RL
What is Gross Primary Productivity? (GPP)
The total amount of sun energy (light) that organisms capture and convert to energy (glucose) through photosynthesis.
OR the total paycheck amount the plant earns.
Respiration loss
the amount of energy used by plants for cellular respiration (cell processes, movements, etc.)
{think of this as taxes taken out of paycheck}
Net Primary Productivity
The amount of energy (biomass) leftover for consumers after plants have used respiration.( energy captures minus the energy respired)
{ this is the actual amount of the plants pay check it keeps after taxes}
Ecological efficiency
The proportion of incoming solar energy that is captured by plants and converted to biomass.
1% of all incoming sunlight is…
captured and converted to GPP via photosynthesis.
40% of that 1% or (.4%) is…
converted in to biomass or, plant growth (NPP)
What is ideal to have high NPP?
Water availability, higher temps and nutrient availability.
The more productive a biome is…
the wider diversity of animal life it can support.
OR
high biodiversity
4 most Ecologically Efficient biomes?
