Components of Ecosystem — Ecological Framework

Ecological Framework

A diagram with four kinds of information

1. Living roles. Mark producers, consumers and decomposers. These are functional categories. A decomposer is an organism; detritus is the dead organic material being processed. Do not classify a fallen leaf as the decomposer that acts on it.

2. Physical conditions and pools. Add light, water, temperature, soil or sediment, and nutrient pools. Connect them to the processes they influence. An abiotic condition is not necessarily external to the chosen ecosystem boundary: water within a pond belongs to its physical environment.

3. Transfers and transformations. Use different labels for energy transfer, feeding, decomposition and nutrient return. A food web includes several feeding connections; a single chain selects one route through them. Energy dissipation and nutrient reuse require different explanations.

4. Measurements. Separate a stock at a time from a rate over a period. Standing biomass is not productivity. In a hypothetical annual budget, gross production of 900 units minus producer respiration of 300 leaves net production of 600 in the same units and period.

Three checks before interpreting the diagram

Does each arrow name what moves or changes?
Are numerator, denominator and time period compatible in a calculation?
Does the observation establish a cause, or merely suggest a relationship to investigate?

The 2026–27 NCERT ecosystem chapter supplies the structure–function framework. The numerical budget above is original practice. A complete answer connects a component to a process and a measurable consequence rather than treating the ecosystem as an inventory.