APES productivity

biomass

the total dry mass of all organisms in an ecosystem biomass_total = biomass_primary_producer(plants) + biomassconsumer+biomassdead_organisms

egesta

undigested food remains; faeces (poo); contains some free energy

net primary production (NPP)

-the amount of energy that is actually stored in the plant after respiration processes. -the net gain of chemical potential energy. the rate plants accumulate dry mass -this represents the amount of energy available to the next trophic level, the primary consumers -0.8% of the absorbed sunlight of 80% of the GPP NPP = GPP - R

excreta

products of the animal's own metabolism, urine, sweat, contains some free energy

net secondary production (NSP)

the amount of energy available to a consumer of that organism NSP = GSP - R

gross secondary production (GSP)

the amount of energy available to the organisms for growth and respiration GSP = food eaten - faecal loss

standing biomass

the biomass at the title of sampling or at a given moment in time; gives no indication of the rate of production or productivity or consumption of biomass

respiration (R):

the process of converting stored chemical energy into kinetic energy to carry out life functions

secondary production (SP)

the production by heterotrophs (regardless of trophic level) food consumed = growth(???) + respiration + egesta + excreta

gross primary production (GPP)

the rate at which chemical energy is stored in plants: 1% of available sunlight between 20-50% of the GPP is used by the plant in respiration process Primary productivity is the rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances. total amount of productivity in a region or system is

primary production (PP)

the rate at which primary producers (plants) store energy in the form of organic substances, chemical potential energy

productivity

the rate of production of energy from a source