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Ecological energetics of populations of four sympatric isopods in a Hong Kong forest

Published online by Cambridge University Press:  10 July 2009

Paul K. S Lam ,
David Dudgeon  and
Herbert H. T. Ma
Paul K. S Lam
Affiliation:
Department of Biology, Chinese University of Hong Kong, Hong Kong
David Dudgeon
Affiliation:
Department of zoology, University of Hong Kong, Hong Kong
Herbert H. T. Ma
Affiliation:
Department of zoology, University of Hong Kong, Hong Kong
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Abstract

Population energy budgets of four sympatric isopods, Burmoniscus ocellatus, Burmoniscus sp. (Philosciidae), Formosillo raffaelei and Orodillo maculatus (Armadillidac), were calculated at two sites in a Hong Kong mixed forest. Mean population standing stock of the four species ranged from 1.25 to 13.61 kj m-2. Mean total isopod biomass at the two sites was 0.85 and 1.85g m-2. Annual production of the four species varied from 4.24 to 30.43 kj m-2 with 5.2–26.4% (energy content) allocated to reproduction. Annual production of the four species combined at the two sites was 23.22 and 50.15kJ m-2. ratios varied from 2.24 to 4.27. Annual population consumption on mixed litter by the four isopod species ranged from 28.4 to 183.0 kj m-2. Total annual consumption by all species at the two sites was 233.7 and 360.2 kj m-2 (1.96 and 2.53% of annual litter fall). Isopod respiratory rales were proportional to body weight, with an exponent ranging from 0.68–0.78 at 23°C. The annual population metabolism of the four species varied from 14.62 to 86.11 kj m-2. Total annual isopod metabolism at the two sites was 116.33 and 185.95 kj m-2. These results are discussed with reference to the role of isopods in litter breakdown and energy flow in the Hong Kong forest.

Keywords

ArmadillidaeenergybudgetisopodsHong KonglittermetabolismPhilosciidaepopulation
Type
Research Article
Information
Journal of Tropical Ecology , Volume 7 , Issue 4 , November 1991 , pp. 475 - 490
Copyright
Copyright © Cambridge University Press 1991

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References

LITERATURE CITED

Adcock, J. A. 1979. Energetics of a population of the isopod Asellus aquaticus: life history and production. Freshwater Biology 9:343–355.CrossRefGoogle Scholar
Adcock, J. A. 1982. Energetics of a population of Asellus aquaticus (Crustacea, Isopoda): respiration and energy budgets. Freshwater Biology 12:257–269.CrossRefGoogle Scholar
Albert, A. M. 1983a. Energy budgets for populations of long-lived arthropod predators (Chilopoda: Lilhobiidae) in an old beech forest. Oecologia 56:292–305.CrossRefGoogle Scholar
Albert, A. M. 1983b. Estimation of oxygen consumption of lithobiid field populations from laboratory measurements. Oecologia 56:280–291.CrossRefGoogle ScholarPubMed
Al-Dabbagh, K. Y. & Marina, B. A. 1986. Relationship between oxygen uptake and temperature in the terrestrial isopod Porcellionides pruinosus. Journal of Arid Environment 11:227–233.CrossRefGoogle Scholar
Benke, A. C. 1984. Secondary production of aquatic insects. Pp. 289–322 in Resh, V. H. & Rosenberg, D. M. (eds). The ecology of aquatic insects. Pracger Press.Google Scholar
Bukhari, N. A. & Alikhan, M. A. 1984. The energy budget of Porcellio spinicornis Say (Porcellionidae, Isopoda) under laboratory conditions. Archives Internationales de Physiologic et de Biochimie 92:73–79.CrossRefGoogle ScholarPubMed
Bukhari, N. A. & Alikhan, M. A. 1985. Caloric values and ash content in relation to body length and dry weight of Porcellio spinicornis Say (Isopoda, Porcellionidae). Crustaceana 49:290–298.CrossRefGoogle Scholar
Cummins, K. W. &Wuycheck, J. C. 1971. Caloric equivalents for investigations in ecological energetics. Internationale Vereinigung fur Theoretische und Angewandle Limnologie No. 18. 158 pp.Google Scholar
Dudgeon, D., Ma, H. H. T. & Lam, P. K. S. In press. Differential palatability of leaf litter to four sympatric isopods in a Hong Kong forest. Oecologia.Google Scholar
Edney, E. B. 1964. Acclimation to temperature in terrestrial isopods. II. Heart rate and standard metabolic rate. Physiological zoology 37:378–394.CrossRefGoogle Scholar
Gromysz-Kalkowska, K., Oder, M. & Szubartowska, E. 1984. Oxygen consumption in Armadillidium nasatum Budde-Lund (Isopoda). Folia Biologica 32:89–108.Google Scholar
Hassall, M. 1977. Consumption of leaf litter by the terrestrial isopod Philoscia muscorum in relation to food availability in a dune grassland ecosystem. Ecological Bulletin 25:550–553.Google Scholar
Hassall, M. 1983. Population metabolism of the terrestrial isopod Philoscia muscorum in a dune grassland ecosystem. Oikos 41:17–26.CrossRefGoogle Scholar
Hassall, M. & Rushton, S. P. 1984. Feeding behaviour of terrestrial isopods in relation to plant defences and microbial activity. Pp. 487–505 in Sutton, S. L. & Holdich, D. M. (eds). The biology of terrestrial isopods. Zoological Society of London Symposia 53. Oxford University Press, Oxford.Google Scholar
Hassall, M. & Sutton, S. L. 1978. The role of isopods as decomposers in a dune grassland ecosystem. Scientific Proceedings of the Royal Dublin Society, Series A 6:117–127.Google Scholar
Hassall, M., Turner, J. G. & Rands, M. R. W. 1987. Effects of terrestrial isopods on the decomposition of woodland leaf litter. Oecologia 72:597–604.CrossRefGoogle ScholarPubMed
Koop, K. & Field, J. G. 1981. Energy transformation by the supralilloral isopod Ligia dilatala Brandt. Journal of Experimental Marine Biology and Ecology 53:221–233.CrossRefGoogle Scholar
Lam, P. K. S. & Dudgeon, D. 1985a. Seasonal effects on litterfall in a Hong Kong mixed forest. Journal of Tropical Ecology 1:55–64.CrossRefGoogle Scholar
Lam, P. K. S. & Dudgeon, D. 1985b. Breakdown of Ficus fistulosa (Moraceae) leaves in Hong Kong, with special reference to dynamics of elements and the effects of invertebrate consumers. Journal of Tropical Ecology 1:249–264.CrossRefGoogle Scholar
Luxmoore, R. A. 1984. A comparison of the respiration rate of some antarctic isopods with species from lower latitudes. British Antarctic Survey Bulletin 62:53–65.Google Scholar
Ma, H. H. T. 1988. The population dynamics, feeding and energetics of four forest isopod (Crustacea) species in Hong Kong. Unpublished M.Phil thesis, University of Hong Kong, Hong Kong. 234 pp.Google Scholar
Ma, H. H. T., Dudgeon, D. & Lam, P. K. S. In press. Seasonal changes in populations of three sympatric isopods in a Hong Kong forest. Journal of Zoology.Google Scholar
Petrusewicz, K. & Macfadyen, A. 1970. Productivity of terrestrial animals. IBP Handbook No. 13. Blackwcll Scientific Publications, Oxford. 190 pp.Google Scholar
Phillipson, J. 1983a. Life cycle, numbers, biomass and respiratory metabolism of Trichoniscus pusillus (Crustacea, Isopoda) in a beech woodland – Wytham Woods, Oxford. Oecologia 57:339–343.CrossRefGoogle Scholar
Phillipson, J. 1983b. Slug numbers, biomass and respiratory metabolism in a beech woodland – Wytham Woods, Oxford. Oecologia 60:38–45.CrossRefGoogle Scholar
Phlllipson, J. & Abel, R. 1983. Snail numbers, biomass and respiratory metabolism in a beech woodland – Wytham Woods, Oxford. Oecologia 57:333–338.CrossRefGoogle Scholar
Phillipson, J. & Watson, J. 1965. Respiratory metabolism of terrestrial isopod Oniscus asellus L. Oikos 16:78–87.CrossRefGoogle Scholar
Reichle, D. E. 1967. Radioisotope turnover and energy flow in terrestrial isopod populations. Ecology 48:351–366.CrossRefGoogle Scholar
Rushton, S. P. & Hassall, M. 1983. Food and feeding rates of the terrestrial isopod Armadillidium vulgare (Latreille). Oecologia 57:415–419.CrossRefGoogle ScholarPubMed
Saito, S. 1969. Energetics of isopod populations in a forest of central Japan. Research in Population Ecology 11:229–258.CrossRefGoogle Scholar
Saito, S. 1970. Methods for the study of production by macro-arthropods. Pp. 215–223 in Phillipson, J. (ed.). Ecology and conservation. II. Methods of study in soil ecology. Unesco, Paris.Google Scholar
Standen, V. 1973. The life cycle and annual production of Trichoniscus pusillus pusillus (Crustacea: Isopoda) in a Cheshire wood. Pedobiologia 13:273–291.CrossRefGoogle Scholar
Wiegert, R. G. 1964. Population energetics of meadow spittlcbugs (Philaenus spumarius L.) as affected by migration and habitat. Ecological Monographs 34:217–241.CrossRefGoogle Scholar
Wightman, J. A. 1977. Respiratory techniques for terrestrial invertebrates and their application to energetic studies. New Zealand Journal of zoology 4:453–469.CrossRefGoogle Scholar
Willows, R. I. 1987. Population and individual energetics of Ligia oceanica (L.) (Crustacea: Isopoda) in the rocky supralittoral. Journal of Experimental Marine Biology and Ecology 105:253–274.CrossRefGoogle Scholar