ENERGY TRASNFER Flashcards
Trophic level
Position occupied bu a group of organisms in a food chain
Biomass
Total mass of organic material in a specific area at a given time
Autrotrophix
Build up organic compund from simple molecule needed for growth
Heterotrophic
Rely on externL soruce for organic compunds
Compare fresh mass vs dry mass
F vs D
Living vs dead
Easy to assess vs difficukt to assess
VaruBke water content vs small sample size so not representative
Unreliable as due to varying water content vs unrealiable because unethical
Calorimetery
Stirrer
Wateri
Oxygen
Distributes hear energy
High heat capacity
Insulation kf air reduces gain of heat
Sun to producer
- Light is refelcted by ozone
- Light is wrong wavelength to be absorbed by chlorophull
- Light doesnt strike chlrophyll
- Light absorbed by water vapour i. Atmosphere
Producer to primary consumer
- Not all plant eaten
- Some energy lost in excreation
- Energy cost in respiration and as heat
- Large amount of plant indigestible
Primary consumer to secondary consumer
- Not all animal eaten ( bones)
- Some energy lost in excration
- Energy lost in respiration and hear to environment
- Large amounts of animal may be indigestible
GPP
Rate of energy concented into glucose ,cellulose
Rate of photosynthesis
NPP
Represents potential enrgy available to heterotrops in ecosusyem
NET PRIMARY PRODUCTION
NPP= GPP - R
Net production of consumers
N= I - (F+R)
Monoculture
Reduces biodiversity through loss of niches and reduces food soruces
Domestic livestock
Restricting movement so less muscle contration so less respiratory loss
Keeping animals indoors and keep animal warm to reduce heat loss
Feeding for growth
Food soruce is easier to absorb reducing amount of energy lost in egestion
Selective breeding some varieties more efficientt at converting energy into new tissues
