Characteristics of Ecosystems (OCR A-Level Biology A): Flashcards
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Practise the cards
10 cards from this deck
Ecosystem
Ecosystem
Community of species + non-living environment in an area
Autotrophic organisms
Autotrophic organisms
Use light/chemical energy to fix carbon
Heterotrophic organisms
Heterotrophic organisms
Require complex carbon compounds as energy source
More intense type of competition
More intense type of competition
Intraspecific (same species need identical resources)
Mutualism
Mutualism
Association where all partner species benefit
Edaphic factors
Edaphic factors
Soil features (pH, texture, moisture, humus, etc.)
Net primary productivity formula
Net primary productivity formula
Gross primary productivity minus respiration
Energy leaves ecosystems as
Energy leaves ecosystems as
Infrared radiation (heat)
Typical energy transfer between trophic levels
Typical energy transfer between trophic levels
Approximately 10%
Why food chains are short
Why food chains are short
Low energy transfer efficiency between levels