GGR205H1 Lecture Notes - Lecture 6: Formosan Subterranean Termite, Soybean Cyst Nematode, Plant Litter
13 Dec 2016
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Document Summary
Soil critters strong role in soils humus synthesis, biochemical weathering, profile mixing, nutrient cycling, aggregate formation and slope stability. The diversity of organisms in the soil . Based on similarities in genetic material, biologists classify all living organisms into three primary domains: eukarya (which includes all plants, animals, and fungi), bacteria, and archaea. Figure 10. 2 a predatory mite (an astigmatid, m) dining on its prey, a microscopic roundworm (a nematode, n). Predation of this type keeps the populations of various groups of organisms in balance and releases nutrients previously tied up in the bodies of the prey. Figure 10. 3 two dung beetles (scarabaeidae), one on top and the other underneath, roll a ball that they have fashioned out of buffalo dung over the leaf-strewn surface of a sandy soil. The female will lay her eggs in the ball of dung and bury it in the soil (some coarse sand grains are sticking to the surface of the dung ball).
