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Concept Maps

Ecosystem — Concept Maps

ICSE · Class 12 · Biology

4 concept maps of Ecosystem for ICSE Class 12 Biology, each also written out as a text outline. Part of the ICSE Class 12 Biology syllabus.

60 questions40 flashcards5 concepts

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A flowchart illustrating the sequential and simultaneous steps involved in the decomposition of detritus: fragmentation, leaching, catabolism, humification, and mineralisation.
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4 Concept Maps

Decomposition Steps in Sequence

Decomposition Steps in Sequence

The map in words

  • Dead Organic Matter\nDETRITUS
    • FRAGMENTATION\nDetritivores break into\nsmaller pieces
      • LEACHING\nWater carries soluble\nnutrients into soil
        • CATABOLISM\nMicrobial enzymatic\ndigestion of organic matter
          • HUMIFICATION\nResistant humus formed\nImproves soil structure
            • MINERALISATION\nHumus broken down to\ninorganic nutrients CO2 H2O minerals
              • Nutrients released\nback to soil and atmosphere

Carbon Cycle — Simplified

Carbon Cycle — Simplified

The map in words

  • COMBUSTION\nFossil fuels, fires
    • CO2 in Atmosphere
      • PHOTOSYNTHESIS\nPlants fix CO2 → organic matter
        • CONSUMERS\nHerbivores eat plants\nCarnivores eat herbivores
          • RESPIRATION\nAll organisms release CO2
          • DEATH\nDead organic matter = detritus
            • DECOMPOSITION\nDecomposers release CO2\nand inorganic nutrients

Biotic Components of an Ecosystem

Biotic Components of an Ecosystem

The map in words

  • BIOTIC COMPONENTS
    • PRODUCERS\nAutotrophs
      • Green plants, algae\nPhytoplankton, Cyanobacteria\nFix solar energy
    • CONSUMERS\nHeterotrophs
      • Primary consumers\nHerbivores: rabbits, insects
      • Secondary consumers\nCarnivores: frogs, small fish
      • Tertiary consumers\nTop predators: eagles
    • DECOMPOSERS\nReducers
      • Bacteria + fungi\nBreak dead matter\nRelease inorganic nutrients

Ecosystem

Ecosystem

The map in words

  • Ecosystem
    • Definition of ecosystem
    • Types of ecosystems
    • Scale of ecosystems
    • Components of ecosystem
    • Biotic components
    • Abiotic components
    • Producers
    • Consumers

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Frequently Asked Questions

What are the important topics in Ecosystem for ICSE Class 12 Biology?
Key topics in Ecosystem include Meaning, Origin, and Types of Ecosystem, Components of Ecosystem, Food Chain, Trophic Levels, and Food Web, Standing Crop, Standing State, and Ecological Pyramids. Study these first, then practise questions on each for the ICSE Class 12 board exam.
What do the concept maps for Ecosystem show?
The 4 maps show how the ideas in Ecosystem connect: Decomposition Steps in Sequence; Carbon Cycle — Simplified. Each map is also written out as an outline on this page.
How should I revise Ecosystem for the ICSE Class 12 board exam?
Learn the core ideas first, then work through the 60 practice questions on Ecosystem. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Ecosystem

All ICSE Class 12 Biology Concept Maps

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