Energy Flows (AQA A-Level Geography): Flashcards
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Practise the cards
10 cards from this deck
Type of system an ecosystem is
Type of system an ecosystem is
Open system - exchanges both energy and materials
Energy flow pattern in ecosystems
Energy flow pattern in ecosystems
One-way path, ultimately lost as heat (not cycled)
Producers (autotrophs)
Producers (autotrophs)
Green plants w/ chlorophyll making own food via photosynthesis
Consumers (heterotrophs)
Consumers (heterotrophs)
Animals that cannot make own food, must eat other organisms
Primary consumers
Primary consumers
Herbivores that feed directly on producers/plants
Role of decomposers
Role of decomposers
Break down dead organic matter, release nutrients back to soil
% of sunlight captured by plants
% of sunlight captured by plants
Less than 2%
% of captured energy lost to respiration by plants
% of captured energy lost to respiration by plants
More than half (over 50%)
What organisms use most energy for
What organisms use most energy for
Maintenance - respiration & maintaining their bodies
Biomass definition
Biomass definition
Mass of living tissue in organisms