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Microclimatic changes and the indirect loss of ant diversity in a tropical agroecosystem

  • Conservation Ecology
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Abstract

Recent changes in the coffee agroecosystem of Costa Rica were used to study the mechanism of biodiversity loss in transforming agroecosystems, focusing on the ground-foraging ant community. Coffee farms are being transformed from vegetationally diverse shaded agroforestry systems to unshaded coffee monocultures. We tested the hypothesis that the high-light environment and lack of leaf litter cover in the unshaded system are the determinants of the differences in ground-foraging ant diversity. Four treatments were established within the light gaps of a shaded plantation: shade, leaf litter, shade plus leaf litter, and a control (no shade or leaf litter added). Ants were sampled using tuna fish baits and light and temperature were measured. Shade and leaf litter had a significant effect on the ant fauna but probably for indirect reasons having to do with species interactions. In both shade treatments, Solenopsis geminata, the tropical fire ant, decreased significantly while the other species increased. The possibility that the physical factor changes the nature of competitive interactions between the most abundant species is discussed.

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References

  • Babbar LI (1993) Nitrogen cycling in shaded and unshaded coffee plantations in the Central Valley of Costa Rica. PhD thesis, University of Michigan

  • Boyce JK, Fernández González A, Fürst E, Segura Bonilla O (1994) Café y desarrollo sostenible: del cultivo agroquìmico a la producción orgánica en Costa Rica. Editorial Fundación UNA, Heredia

    Google Scholar 

  • Dourojeanni MJ (1990) Entomology and biodiversity conservation in Latin America. Am Entomol 36: 88–93

    Google Scholar 

  • Erwin TL (1988) The tropical forest canopy: the heart of biotic diversity. In: Wilson EO (ed) Biodiversity. National Academy Press, Washington, pp 123–129

    Google Scholar 

  • ICAFE-MAG (1989) El cultivo de café en Costa Rica. Programa cooperativo ICAFE-MAG, San José, Costa Rica

    Google Scholar 

  • Lovejoy TE (1980) A projection of species extinction. In: The global 200 report to the President: entering the twenty-first century. Council on Environmental Quality and the US Department of State. US Government Printing Office, Washington, pp 328–331

    Google Scholar 

  • May RM (1988) How many species are there on earth? Science 241: 1441–1449

    Google Scholar 

  • May RM (1990) How many species? Philos Trans R Soc Lond B 330: 293–304

    Google Scholar 

  • Myers N (1979) The sinking ark. Pergamon, New York

    Google Scholar 

  • Nestel D, Dickschen F (1990) The foraging kinetics of ground ant communities in different coffee agroecosystems. Oecologia 84: 58–63

    Google Scholar 

  • Nestel D, Dickschen F, Altieri MA (1993) Diversity patterns of soil macro-Coleoptera in Mexican shaded and unshaded coffee agroecosystems: an indication of habitat perturbation. Biodivers Conserv 2: 70–78

    Google Scholar 

  • Perfecto I (1990) Indirect and direct effects in a tropical agroecosystem: the maize-pest-ant system in Nicaragua. Ecology 71: 2125–2134

    Google Scholar 

  • Perfecto I (1991) Dynamics of Solenopsis geminata in a tropical fallow field after ploughing. Oikos 62: 139–144

    Google Scholar 

  • Perfecto I (1994) Foraging behavior as a determinant of asymmetric competitive interaction between two ant species in a tropical agroecosystem. Oecologia 98: 184–192

    Google Scholar 

  • Perfecto I, Sediles A (1992) Vegetational diversity, the ant community and herbivorous pests in a tropical agroecosystem in Nicaragua. Environ Entomol 21: 61–67

    Google Scholar 

  • Perfecto I, Snelling R (1995) Biodiversity and tropical ecosystem transformation: ant diversity in the coffee agroecosystem in Costa Rica. Ecol Appl 5(4): 1084–1097

    Google Scholar 

  • Perfecto I, Vandermeer JH (1994) Understanding biodiversity loss in agroecosystems: reduction of ant diversity resulting from transformation of the coffee ecosystem in Costa Rica. Entomology 2: 7–13

    Google Scholar 

  • Pimentel DA., Stachow U, Takacs DA, Brubaker W, Dumas AR, Meaney JJ, O'Neil JA, Onsi DE, Corzilius DB (1992) Conserving biological diversity in agricultural/forestry systems. BioScience 42: 354–362

    Google Scholar 

  • Price PW (1988) An overview of organismal interactions in ecosystems in evolutionary and ecological time. Agric Ecosyst Environ 24: 369–377

    Google Scholar 

  • Reid WV, Miller KR (1989) Keeping options alive: the scientific basis for conserving biodiversity. World Resources Institute, Washington

    Google Scholar 

  • Reynolds JS (1991) Soil nitrogen dynamics in relation to ground-water contamination in the Valle Central, Costa Rica. PhD thesis, University of Michigan

  • Rice RA (1990) Transforming agriculture: the case of coffee leaf rust and coffee renovation in southern Nicaragua. PhD dissertation, University of California, Berkeley

  • Risch SJ, Carroll CR (1982a) The ecological role of ants in a Mexican agroecosystem. Oecologia 55: 114–119

    Google Scholar 

  • Risch SJ, Carroll CR (1982b) Effect of a keystone predatious ant, Solenopsis geminata, in a non-equilibrium community. Ecology 63: 179–183

    Google Scholar 

  • Swift M, Vandermeer JH, Anderson J, Ramakrishna R, Hawkins B (in press) Biodiversity, structure and function of agroecosystems. In: Mooney H (ed) Biodiversity and function. SCOPE John Wiley, Chinchester

  • Western D, Pearl MC (eds) (1989) Conservation for the twentyfirst century. Oxford University Press, New York

    Google Scholar 

  • Wilson EO (1987) The little things that run the world. Conserv Biol 1: 344–346

    Google Scholar 

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Perfecto, I., Vandermeer, J. Microclimatic changes and the indirect loss of ant diversity in a tropical agroecosystem. Oecologia 108, 577–582 (1996). https://doi.org/10.1007/BF00333736

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  • DOI: https://doi.org/10.1007/BF00333736

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