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Soil biodiversity refers both to the relationship of soil to biodiversity and to aspects of the soil that can be managed in relation to biodiversity. Soil biodiversity relates to some catchment management considerations. ==Soil and biodiversity== According to the Australian Department of the Environment and Water Resources, biodiversity is "the variety of life: the different plants, animals and micro-organisms, their genes and the ecosystems of which they are a part".〔(Department of Environment and Water Resources, 2007, viewed June 2007 )〕 Biodiversity and soil are strongly linked, because soil is the medium for a large variety of organisms, and interacts closely with the wider biosphere. Conversely, biological activity is a primary factor in the physical and chemical formation of soils.〔Bardgett, RD 2005, The biology of soil: a community and ecosystem approach, Oxford University Press Inc, New York.〕 Soil provides a vital habitat, primarily for microbes (including bacteria and fungi), but also for microfauna (such as protozoa and nematodes), mesofauna (such as microarthropods and enchytraeids), and macrofauna (such as earthworms, termites, and millipedes).〔 The primary role of soil biota is to recycle organic matter that is derived from the "above-ground plant-based food web". Soil is in close cooperation with the wider biosphere. The maintenance of fertile soil is "one of the most vital ecological services the living world performs", and the "mineral and organic contents of soil must be replenished constantly as plants consume soil elements and pass them up the food chain".〔Baskin, Y 1997, The work of nature, The Scientific Community on Problems of the Environment (SCOPE), Island Press, Washington, DC〕 The correlation of soil and biodiversity can be observed spatially. For example, both natural and agricultural vegetation boundaries correspond closely to soil boundaries, even at continental and global scales.〔Young, A & Young R 2001, Soils in the Australian landscape, Oxford University Press, Melbourne.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Soil biodiversity」の詳細全文を読む スポンサード リンク
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