External Control of Ecosystem
By H. Sudiyono
EXTERNAL CONTROL OF ECOSYSTEM
An ecosystem is a community of living organisms (plants, animal, and microbes) in conjunction with the nonliving components of environment (thing like air, water, and mineral soil), interacting as a system. These components are regarded as linked together through nutrient cycles and energy flows. As ecosystems are defined by the network of interactions among organism and their environment, they can come in any size but usually encompass specific, limited spaces (although some scientists say that the entire planet is an ecosystem).
Energy, water, nitrogen, and soil minerals are other essential abiotic components of an ecosystem. The energy that flows through ecosystems is obtained primarily from the sun. it generally enters the system through photosynthesis, a process that also captures carbon from the atmosphere. By feeding on plants and on one another, animal 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 nutrient stored in dead biomass back to a form that can be readily used by plants and other microbes.
Ecosystems are controlled both by external and internal factors. External factor such as climate, the parent material which forms the soil and topography, control the overall structure of an ecosystem and the way things work within it, but are not themselves influenced by the ecosystem. Other external factors include time and potential biota. Ecosystem are dynamic entities-invariably, they are subject to periodic disturbances and are in the process of recovering from some past disturbance. Ecosystem in similar environment that are located in different parts of the world can and up doing things very differently simply because they have different pools of species present.
Sources from : Sirli P. & S.S. Shehnaz