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Effects of habitat fragmentation on Amazonian termite communities

Published online by Cambridge University Press:  10 July 2009

Og Francisco Fonseca de Souza  and
Valerie K. Brown
Og Francisco Fonseca de Souza
Affiliation:
Departamento de Biologia Animal, Universidade Federal de Viqosa, 36570 Viçosa, MG, Brazil Department of Biology, Imperial College at Silwood Park, Ascot, Berks. SL5 7PY, UK
Valerie K. Brown*
Affiliation:
Department of Biology, Imperial College at Silwood Park, Ascot, Berks. SL5 7PY, UK
*
1Correspondence author.
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Abstract

Intuitively, termites would seem to be a very suitable group to illustrate effects of ecosystem fragmentation. Being detritivores, they do not control directly the rate at which their resources are available, nor do they restrict the ability of the resources to regenerate. Consequently, termites do not mask the ecosystem depletion caused by fragmentation. With this in mind, we compared the communities of termites in undisturbed Amazonian forest with those of two isolated fragments nearby, aiming to show that the differences observed may have resulted from habitat fragmentation. Dissimilarities between communities in the undisturbed forest suggest natural patchiness in their distribution, which could lead to misinterpretation of the effects of fragmentation. Continuous forest had higher species richness and fewer rare species than the fragments. Guild structure in the forest was biased towards soil-feeding termites, which are subterranean and soft bodied, and therefore more sensitive to variation in microclimate. In the fragments, litterfeeders and species intermediate between soil-feeding and wood-feeding types were numerically more important. Habitats in the forest were more equally used than in the fragments, suggesting habitat unsuitability increased with fragmentation. It is suggested that the community composition of the fragments is a result of the intrinsic patchiness of the original forest and deterministic and stochastic extinctions caused by fragmentation. The need for manipulative experiments to test such ideas is discussed.

Keywords

AmazoniaBrazilecosystem fragmentationhabitat islandsIsopterarainforesttermite ecology
Type
Research Article
Information
Journal of Tropical Ecology , Volume 10 , Issue 2 , May 1994 , pp. 197 - 206
Copyright
Copyright © Cambridge University Press 1994

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References

LITERATURE CITED

Bandeira, A. G. 1983. Estrutura ecológica de communidades de cupins (Insecta, hopttra) na Zona Bragantina, Estado do Pará. Manaus. PhD thesis, Instituto Nacional de Pesquisas da Amazônia.Google Scholar
Brokaw, N. V. L. 1985. Treefalls, regrowth, and community structure in tropical forests. Pp. 53–71 in Pickett, S. T. A. & White, P. S. (eds). The ecology of natural disturbance and patch dynamics. Academic Press, London.Google Scholar
Fontes, L. R. 1982. Novos taxons e novas combinações nos cupins nasutos geófagos na região Neotropical (Isoptera, Termitidae, Nasutitermitinae). Reuista Brasileira de Entomologia 26(1):99–108.Google Scholar
Gilpin, M. E. & Soulé, M. 1986. Minimum viable populations: processes of species extinction. Pp. 19–34 in Soulé, M. (ed.). Conservation biology. The science of scarcity and diversity. Sinauer Associates, Sunderland.Google Scholar
Gontijo, T. A. & Domingos, D. J. 1991. Guild distribution of some termites from cerrado vegetation in south-east Brazil. Journal of Tropical Ecology 7:523–529.CrossRefGoogle Scholar
Holdridge, L. R. 1967. Life zone ecology. (Revised edition). Tropical Science Center, San Jose. 206 pp.Google Scholar
Jaenike, J. 1978. Effect of island area on Drosophila population densities. Oealogia 36:327–332.Google ScholarPubMed
Jennersten, O. 1988. Pollination in Dianthus deltoides (Caryophyllaceae): Effects of habitat fragmentation on visitation and seed set. Conservation Biology 2(4):359–366.CrossRefGoogle Scholar
Kapos, V. 1989. Effects of isolation on the water status of forest patches in the Brazilian Amazon. Journal of Tropical Ecology 5:173–185.CrossRefGoogle Scholar
Klein, B. C. 1989. Effects of forest fragmentation on dung and carrion beetle communities in Central Amazônia. Ecology 70(6): 1715–1725.CrossRefGoogle Scholar
Lovejoy, T. E., Bierregaard, R. O. Jr., Rylands, A. B., Malcolm, J. R., Quintela, C. E., Harper, L. H., Brown, K. S. Jr., Powell, G. V., Schubart, H. O. R. & Hays, M. 1986. Edge and other effects of isolation of Amazon forest fragments. Pp. 257–285 in Soule, M. (ed.). Conservation biology. Sinauer Associates, Sunderland.Google Scholar
MacArthur, R. H. 1970. Species packing and competitive equilibrium for many species. Theoretical Population Biology 1:1–11.CrossRefGoogle ScholarPubMed
Mathews, A. G. A. 1977. Studies on termites from the Mato Grosso State, Brazil. Academia Brasileira de Ciências, Rio de Janeiro. 267 pp.Google Scholar
Morse, D. H. 1980. Behavioural mechanisms in ecology. Harvard University Press, Cambridge. 383 pp.Google Scholar
Quinn, J. F. & Harrison, S. P. 1988. Effects of habitat fragmentation and isolation on species richness: evidence from biogeographic patterns. Oecologia 75:132–140.CrossRefGoogle ScholarPubMed
Schowalter, T. D. 1985. Adaptations of insects to disturbance. Pp. 235–252 in Pickett, S. T. A. & White, P. S. (eds). The ecology of natural disturbance and patch dynamics. Academic Press, London.Google Scholar
Simberloff, D. 1986. Design of natural reserves. Pp. 315–337 in Usher, M. B. (ed.). Wildlife conservation evaluation. Chapman & Hall, London.CrossRefGoogle Scholar
Thomas, C. D. 1990. What do real population dynamics tell us about minimum viable population sizes? Conservation Biology 4(3):324–327.CrossRefGoogle Scholar
Wilcox, B. A. & Murphy, D. D. 1985. Conservation strategy: the effects of fragmentation on extinction. The American Naturalist 125:879–887.CrossRefGoogle Scholar
Williamson, M. H. 1981. Island populations. Oxford University Press, Oxford. 286 pp.Google Scholar