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1 October, 13:28

Explain how to change to an ecosystem affects the cycling matter and flow of energy in living and nonliving parts of an ecosystem

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  1. 1 October, 15:31
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    The cycling of matter and the flow of energy within ecosystems occur through interactions among different organisms and between organisms and the physical environment. All living systems need matter and energy (we humans are a prime example). Matter fuels the energy-releasing chemical reactions that provide energy for life functions and provides the material for growth and repair of tissue (like that of a starfish. Cut off one of it's limbs and it repairs itself). Energy from light is needed for plants because the chemical reaction that produces plant matter from air and water requires an energy input to occur. Animals acquire matter from food, that is, from plants or other animals. The chemical elements that make up the molecules of organisms pass through food webs and the environment and are combined and recombined in different ways. At each level in a food web, some matter provides energy for life functions, some is stored in newly made structures, and much is discarded to the surrounding environment. Only a small fraction of the matter consumed at one level is captured by the next level up. As matter cycles and energy flows through living systems and between living systems and the physical environment, matter and energy are conserved in each change. Addtionally, the carbon cycle itself, provides an example of matter cycling and energy flow in ecosystems. Photosynthesis, digestion of plant matter, respiration, and decomposition are important components of the carbon cycle, in which carbon is exchanged between the biosphere, atmosphere, oceans, and geosphere through chemical, physical, geological, and biological processes.
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