THE Ecology of symphyla: part i. populations
1958
EDWARDS, C.A.
Symphylid populations were studied using a standardized sampling technique, consisting of twenty random, vertical 2 1/2′ diameter cores taken to the subsoil, and flotation extraction. Of 415 locations sampled symphylids were present in 32.0% of grassland, 25.8% of forest litter, 44.2% of cultivated soils and 52.8% of greenhouse soils. Populations were high, up to 88,000,000 per acre, and the order of decreasing population density was greenhouse soil, outdoor cultivated soil, forest litter and fallow soil. Investigations on optimal soil type showed loams to be most favourable, pure sands and clays least suited, and clay loams and sandy clay loams intermediate. It was concluded that the most favourable soil characteristics for symphylids were high organic matter content, good moisture holding capacity and the ability to compact and form crevices.
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