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・ SOJA (EP)
・ Soja Jovanović
・ SOJA – Live in Hawaii
・ Sojaprotein
・ Soil Conservation Services Hickory Creek Basin Retarding Pond 16
・ Soil Conservation Society of America
・ Soil contamination
・ Soil crust
・ Soil defertilisation
・ Soil discography
・ Soil ecology
・ Soil erosion
・ Soil fertility
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・ Soil Festivities
Soil food web
・ Soil functions
・ Soil gas
・ Soil governance
・ Soil gradation
・ Soil guideline value
・ Soil health
・ Soil Health Card Scheme
・ Soil horizon
・ Soil in the United States
・ Soil inference system
・ Soil life
・ Soil liquefaction
・ Soil loss tolerance
・ Soil management


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Soil food web : ウィキペディア英語版
Soil food web

The soil food web is the community of organisms living all or part of their lives in the soil. It describes a complex living system in the soil and how it interacts with the environment, plants, and animals.
Food webs describe the transfer of energy between species in an ecosystem. While a food chain examines one, linear, energy pathway through an ecosystem, a food web is more complex and illustrates all of the potential pathways. Much of this transferred energy comes from the sun. Plants use the sun’s energy to convert inorganic compounds into energy-rich, organic compounds, turning carbon dioxide and minerals into plant material by photosynthesis. Plants are called autotrophs because they make their own energy; they are also called producers because they produce energy available for other organisms to eat. Heterotrophs are consumers that cannot make their own food. In order to obtain energy they eat plants or other heterotrophs.
== Above ground food webs ==

In above ground food webs, energy moves from producers (plants) to primary consumers (herbivores) and then to secondary consumers (predators). The phrase, trophic level, refers to the different levels or steps in the energy pathway. In other words, the producers, consumers, and decomposers are the main trophic levels. This chain of energy transferring from one species to another can continue several more times, but eventually ends. At the end of the food chain, decomposers such as bacteria and fungi break down dead plant and animal material into simple nutrients.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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