1.4 The Earth is a closed system in terms of matter flow, in which matter is recycled and conserved.
As we can see in figure 1.9, living beingsdetermine the characteristic of a closed system, as they interact with their environment they regulate and renew the cycling of chemical material.
The cycling of chemical materials begins with theincorporation of inorganic compounds from the atmosphere to the productive organisms, which elaborate the organic compounds they need to subsist through photosynthesis. At the same time, these organiccompounds of plants are consumed by the rest of the consumer organisms and finally get to the disintegrator organisms, which decompose organic compounds into simple inorganic compounds thatreincorporate to the atmosphere or the ground, giving closure to the chemical compound cycle.
The flow of chemical compounds from the physical subsystem to the biological subsystem, and from thebiological back to the physical is the fundamental principle of the transformation and flow of energy, as well as of the flow of matter, processes known as biochemical cycles.
Biochemical cyclesrenew and recycle matter and define the sustainability of resources in ecosystems, this is why they are so important.
1.5 Ecosystems with a finite productivity and sustainability provideservices and goods to man kind.
Ecosystem: a system formed by the interaction of a community of organisms with their physical environment.
Finite: bounded or limited in magnitude orspatial or temporal extent.
Productivity: productiveness; the quality of being productive or having the power to produce.
Sustainability: the ability to maintain balance of a certainprocess or state in any system.
Services: performance of duties or provision of space and equipment helpful to others
Goods: any object or service that increases utility, directly or...