The soil is an important base of life for higher plants, and the root systems, soil animals, and soil microorganisms form a single system as a whole through close interactions between each community and with the physical and chemical environment of the soil that surrounds them. The soil ecosystem is primarily responsible for the consumption and decomposition of animal and plant remains in the biological processes of energy translocation and material circulation in terrestrial ecosystems. The biomass (fresh weight) of the biomass and microorganisms that make up the soil ecosystem is greater than that of soil animals, and the organic matter decomposition capacity of microorganisms is also much greater per unit of biomass. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
土壌を生活の重要な拠点としている高等植物の根系,土壌動物,土壌微生物が,それぞれの生物群集の間で,またそれらをとりまく土壌の物理・化学的環境と,密接な相互作用で結びつけられて,全体として一つのシステムを形成している状態をいう。土壌生態系は,陸上生態系のエネルギー転流と物質循環の生物過程において,主として動植物遺体の消費・分解の役割を担当している。土壌生態系を構成する生物群集中,微生物の現存量(生体重)は土壌動物のそれより大きく,また微生物の有機物分解力も単位現存量当り動物にくらべてきわめて大きい。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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