The functions of the ecosystem regulate essential ecological processes, support life systems, and render stability. The ecosystem is responsible for nutrient cycling, maintaining a balance among trophic levels, and cycling minerals through the biosphere.
Rate of biomass production — how efficiently solar energy enters the ecosystem.
Sequential transfer from producers → consumers → decomposers → environment.
Breakdown of dead organic material. Top-soil is the major site for decomposition.
Nutrients consumed and recycled back in various forms for reuse by organisms.
Energy captured from the sun flows from producers to consumers and then to decomposers, and finally back to the environment. At each trophic level, approximately 90% of energy is lost as heat — only 10% passes to the next level.
This 10% rule explains why food chains rarely exceed 4–5 trophic levels — there simply isn't enough energy to sustain a higher-level predator beyond that point.
Unlike energy, which flows in one direction, nutrients cycle through the ecosystem continuously. Carbon, nitrogen, phosphorus, and water all follow distinct biogeochemical cycles that link living organisms to the physical environment.
Decomposers play a critical role here — without them, nutrients would remain locked in dead organic matter and unavailable to producers.