T. pusillus produced two distinct generations per year (May–June and July–August), members of the early generation reproduced at ca. 12 and 15 months of age while those of the later generation did so at ca. 12 and 22 months. Mortality in summer was higher than in winter. The presence of overlapping generations is believed to aid population stability between years. Mean density and biomass were found to be 480–500 individuals m-2 and 256–268 mg live wt. m-2. Annual respiratory metabolism at 0.399 l O2 m-2 comprises 0.15% of the total soil metabolism. The production/biomass (P/B) ratio was estimated to be 3.5 and the net production efficiency (P=100/P+R) 42%.
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Al-Dabbagh KY, Block W (1981) Population ecology of a terrestrial isopod in two Breckland grass heaths. J Anim Ecol 50:61–77
Heilbrunn LV (1947) An outline of general physiology (2nd ed.) Saunders, London
Kempson D, Lloyd M, Ghelardi R (1963) A new extractor for woodland litter. Pedobiologia 3:1–21
McNeill S, Lawton JH (1970) Animal production and respiration in animal populations. Nature 225:472–474
Meyer E, Phillipson J (1983) Respiratory metabolism of the small isopod Trichoniscus pusillus provisorius (Racovitza). Oikos
Phillipson J (1983) Wood biomass, production and litter-fall in an English beechwood. Oecologia (Berlin) 57:189–195
Phillipson J, Abel R, Steel J, Woodell SRJ (1976) Earthworms and the factors governing their distribution in a English beechwood. Pedobiologia 16:258–285
Phillipson J, Abel R, Steel J, Woodell SRJ (1977) Nematode numbers, biomass and respiratory metabolism in a beech woodland — Wytham Woods, Oxford. Oecologia (Berlin) 27:141–155
Phillipson J, Putman RJ, Steel J, Woodell SRJ (1975) Litter input, litter decomposition and the evolution of carbon dioxide in a beech woodland — Wytham Woods, Oxford. Oecologia (Berlin) 20:203–217
Standen V (1973) The life cycle and annual production of Trichoniscus pusillus pusillus (Crustacea: Isopoda) in a Cheshire wood. Pedobiologia 13:273–291
Sunderland KD, Hassall M, Sutton SL (1976) The population dynamics of Philoscia muscorum (Crustacea, Oniscoidea) in a dune grassland ecosystem. J Anim Ecol 45:487–506
Sutton SL (1968) The population dynamics of Trichoniscus, pusillus and Philoscia muscorum (Crustacea, Oniscoidea) in limestone grassland. J Anim Ecol 37:425–444
Sutton SL (1972) Woodlice. Ginn, London
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Phillipson, J. Life cycle, numbers, biomass and respiratory metabolism of Trichoniscus pusillus (Crustacea, Isopoda) in a beech woodland — Wytham Woods, Oxford. Oecologia 57, 339–343 (1983). https://doi.org/10.1007/BF00377178
- Life Cycle
- Production Efficiency
- Early Generation
- Total Soil