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Red crabs in rain forest, Christmas Island: removal and relocation of leaf-fall

  • Dennis J. O'Dowd (a1) and P. S. Lake (a1)

Field experiments comparing leaf-fall in the presence and absence of the red land crab, Gecarcoidea natalis, in rain forest on Christmas Island, Indian Ocean showed that, by eating and returning leaves to their burrows, they significantly reduced accumulation of leaf-fall on the forest floor. Red crabs removed 30–50% of the leaf-fall at the experimental sites during the study. Differences in leaf-fall mass between crab-access and exclusion quadrats were positively correlated with the density of foraging red crabs. Red crabs also generated spatial heterogeneity in the distribution of litter on the forest floor by returning litter to their burrows. Leaves lined chambers of 64% of excavated burrows and litter biomass around the entrances was significantly greater than that on off-burrow locations. This was reflected in the significantly higher concentrations of organic matter and nutrients (N, P, K, Ca, Na, and Mg) associated with soils near burrow entrances. These results suggest that a single species, G. natalis, is the major processor of leaf-fall in rain forest on Christmas Island and may affect (1) the temporal and spatial patterns of nutrient availability and (2) the diversity and biomass of the litter fauna.

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H. G. L. Alexander 1979. A preliminary assessment of the role of the terrestrial decapod crustaceans in the Aldabran ecosystem. Philosophical Transactions of the Royal Society of London B. 286:241246.

J. M. Anderson , J. Proctor & H. W. Vallack 1983. Ecological studies in four contrasting lowland rain forests in Gunung Mulu National Park, Sarawak. Journal of Ecology 71:503527.

F. Bärlocher 1980. Leaf-eating invertebrates as competitors for aquatic hyphomycetes. Oecologia 47:303306.

A. J. Beattie & D. C. Culver 1983. The nest chemistry of two seed-dispersing ant species. Oecologia 56:99103.

B. L. Bentley , R. Herrera , J. T. Arnason , J. S. Molina Buck , R. Castilleja , L. E. Garcia Garcia , C. F. Jordan , C. E. Russell , E. Salati & E. Sanhueza 1982. Report of the work group on Latin American Forests. Plant and Soil 67:415420.

M. D. Bertness 1985. Fiddler crab regulation of Spartina alterniflora production on a New England salt marsh. Ecology 66:10421055.

D. E. Bliss 1979. From sea to tree: saga of a land crab. American Zoologist 19:385410.

D. L. Coppock , J. K. Detling , J. E. Ellis & M. I. Dyer 1983. Plant-herbivore interactions in a North American mixed-grass prairie. Oecologia 56:19.

E. J. Fittkau & H. Klinge 1973. On the biomass and trophic structure of the Central Amazonian rain forest ecosystem. Biotropica 5:214.

C. F. Herreid 1963. Observations on the feeding behavior of Cardisoma guanhumi (Latreille) in southern Florida. Crustaceana 5:176180.

C. F. Herreid & C. A. Gifford 1963. The burrow habitat of the land crab, Cardisoma guanhumi (Latreille). Ecology 44:773775.

J. W. Hicks 1985. The breeding behaviour and migrations of the terrestrial crab Gecarcoidea natalis (Decapoda: Brachyura). Australian Journal of Zoology 33:127142. (see accessory publication).

H. F. Howe & J. Smallwood 1982. The ecology of seed dispersal. Annual Review of Ecology and Systematics 13:201218

L. C. Katz 1980. Effects of burrowing by the fiddler crab, Uca pugnax (Smith). Estuarine and Coastal Marine Sceince 11:233237

M. A. B. Lee 1985. The dispersal of Pandanus tectorius by the land crab Cardisoma carnifex. Oikos 45:169173.

S. M. Louda & P. H. Zedler 1985. Predation in insular plant dynamics: an experimental assessment of postdispersal fruit and seed survival, Enewetak Atoll, Marshall Islands. American Journal of Botany 72:438445.

A. I. Robertson 1986. Leaf-burying crabs: their influence on energy flow and export from mixed mangrove forests (Rhizophora spp.) in northeastern Australia. Journal of Experimental Marine Biology and Ecology 102:237247.

J. H. Warren & A. J. Underwood 1986. Effects of burrowing crabs on the topography of mangrove swamps in New South Wales. Journal of Experimental Marine Biology and Ecology 102:223235.

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Journal of Tropical Ecology
  • ISSN: 0266-4674
  • EISSN: 1469-7831
  • URL: /core/journals/journal-of-tropical-ecology
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