Energy Transfer & Productivity (AQA A-Level Biology): Flashcards
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Practise the cards
10 cards from this deck
% of solar energy captured by plants via photosynthesis
% of solar energy captured by plants via photosynthesis
1-3%
Formula for Net Primary Production (NPP)
Formula for Net Primary Production (NPP)
(R = respiratory losses)
% of GPP plants use for respiration
% of GPP plants use for respiration
20-50%
% of NPP transferred to primary consumers for growth
% of NPP transferred to primary consumers for growth
Less than 10%
% energy transfer in secondary/tertiary consumers
% energy transfer in secondary/tertiary consumers
~20%
Formula for consumer net production
Formula for consumer net production
(I=ingested, F=faeces/urine, R=respiration)
Formula for % energy transfer efficiency between trophic levels
Formula for % energy transfer efficiency between trophic levels
Typical number of trophic levels in food chains
Typical number of trophic levels in food chains
Four or five
Intensive rearing: restricting movement reduces energy used in
Intensive rearing: restricting movement reduces energy used in
Muscle contraction
Simplifying food webs: eliminating what competes with crops?
Simplifying food webs: eliminating what competes with crops?
Weeds (competitor organisms)