An ecosystem consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the system through photosynthesis and is incorporated into plant tissue. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter, decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and microbes. Ecosystems are controlled by external and internal factors. External factors such as climate, parent material which forms the soil and topography, control the overall structure of an ecosystem but are not themselves influenced by the ecosystem.

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New Ecosystem Discovered In The Maldives: ‘The Trapping Zone’

The Accidental Ecosystem By Peter S. Alagona — Review

Discovery of new ecosystem -- 'The Trapping Zone' -- creating oasis of life in the Maldives

Ecosystem-based fisheries management restores western Baltic fish stocks

Should Low Earth Orbit be a protected environmental ecosystem?

Exquisite Fossils Show an Entire Rain Forest Ecosystem

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NASA selects SiFive and makes RISC-V the go-to ecosystem for future missions