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level: Level 1 of Energy and ecosystems

Questions and Answers List

level questions: Level 1 of Energy and ecosystems

QuestionAnswer
Biomass definitions and unitsthe mass of carbons in an organisms / measured as dry mass of tissue per unit area
Calorimeter used to measure energy value of certain biomass1. Dry the sample ( hot oven at 80 degrees) 2. Burn it in presence of 100% oxygen 3.Measure the energy released by recording the temp change of surrounding water
Why does an oak tree's biomass change over the yearMore photosynthesis in summer so more glucose so can be used to grow so biomass increases
what is GPPchemical energy sotred IN PLANT BIOMASS Measured in Joules of all organic molecules made due to photosynthesis
NPPchemical energy store left in plants biomass after respirator loss
what is the equation linking it togetherNPP= GPP-R
What increases NPPUsing fertilisers to increase growth using herbicides to limit interspecific competition from competing weed species hedgegrows are removed to make space for crop species growing crops in greenhouses control of limiting factors
% effiency of energy transferenergy after/ energy before x 100
The equation for net productionN=I - (F+R)
What does shows trophic levelsa food chain shows the path of energy from one living organisms to another
trophic levels showsproducer -primary consumer - secondary consumer - tertiary consumer
What are decomposersmicrogranisms that break down detritus