OCR•A-Level•Biology
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Ecosystems
Populations, succession, and nutrient cycles
Practice 40 subtopics in Ecosystems. All questions match the OCR A-Level specification.
About Ecosystems
Ecosystems is a key topic in the OCR A-Level Biologyspecification. This topic covers populations, succession, and nutrient cycles.
Master all 40 subtopics below with unlimited AI-generated questions. Each subtopic page includes sample questions and the ability to generate unlimited practice questions with detailed solutions.
All Subtopics (40)
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Practice any subtopic from Ecosystems
Ecosystem structureBiotic factorsAbiotic factorsPopulationsPopulation growthCarrying capacityLimiting factorsPredator-prey relationshipsCompetitionInterspecific competitionIntraspecific competitionEcological nichesEnergy flowFood chainsFood websTrophic levelsGross primary productivityNet primary productivityEnergy transfer efficiencyPyramids of biomassPyramids of energyNitrogen cycleNitrogen fixationNitrificationDenitrificationAmmonificationCarbon cycleDecompositionPhosphorus cyclePrimary successionSecondary successionClimax communityDeflected successionConservationAgricultureFarming practicesSustainabilityClimate changeNitrogen fertilisersEutrophication
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Start with Ecosystem structure