FRST 201

bioaccumulation

accumulation of chemicals in an organism, rate of intake exceeds rate of excretion

biomagnification

build up of toxins in a food chain (increases in tissues of organism at each trophic level)

functional redundancy

variety of different species can share similar/identical roles in ecosystem functions

apparent competition

increase of one population decreases the population of another because it affects pop in between

productivity

accrual of carbon fixed into biomass for a given area within a specified time frame

gross primary productivity

how much carbon is fixed by a plant through photosynthesis before any losses (doesn’t take into account losses by respiration)

net primary productivity

how much biomass is produced after cellular respiration occurs in plants

net ecosystem productivity

diff between GPP and total ecosystem respiration

accrual of biomass after losses

net biome productivity

accrual of biomass after inputs and losses

GPP

photosynthetic CO2 fixation

NPP

GPP - autotrophic respiration

NEP

NPP - heterotrophic respiration

NBP

NEP - ecosystem losses + additions

leaf area index

total surface area of plant leaves per ground area

breakdown of GPP

foliage NPP - 10%

wood NPP - 15%

foliage resp - 15%

wood resp - 10%

belowground carbon allocation - 50%

respiration in plants

Rgrowth (25%) + Rmaintenance (50%) + Rion (25%)