Abstract
In this paper, we report the number of core and transient bird species in an Amazonian savanna site and assess their ecological differences. We conducted our study at Campo Experimental do Cerrado (CEC) da Embrapa—Amapá, 48 km north of Macapá (0°2′5″ N / 51°2′2″ W), Amapá, Brazil. Forty points were monitored on a monthly basis over the course of one year, using the unlimited-distance point counts in a plot of 360 hectares of well-preserved and relatively homogeneous upland savanna from September 2006 to August 2007. Species were classified in core (recorded in the area in nine or more months), transient (recorded in the area in four or less months) and intermediate (the ones recorded between five and eight months). Species were also classified according to feeding guilds and habitat preferences. Statistical analyses were made to compare core and transient species. We recorded 72 species in the plot, of which 36 were transients, 12 were intermediates, and 22 were core. Core species have higher abundances than transient species. Core species are found mostly in the savanna while transient species also occur in other habitats within the landscape. Both core and transient groups presented well-marked seasonal variation in abundance. Recruitment explains abundance variation for core species, while differences in the availability of food resources in the site explains variation of the abundance in transient species. We predict that plot-level (not more than 500 hectares) bird assemblages in South American savannas will be composed of a small number of abundant and habitat-restricted species that occupy the site almost year round, combined with a high number of low abundant transient species that are habitat generalists and use the plot only during limited periods of their annual life cycle.
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Aleixo, A. & Poletto, F. 2007. Birds of an open vegetation enclave in southern Brazilian Amazonia. Wilson Journal of Ornithology, 119: 610–630.
Ayres, M.; Ayres, M. M.; Ayres, D. L. & Santos, A. S. 2007. BioEstat 5.0–Aplicações estatísticas nas áreas das ciências biomédicas. Belém, Brazil: Sociedade Civil Mamirauá / MCT-CNPq / Conservation International.
Belmaker, J. 2009. Species richness of resident and transient coraldwelling fish responds differentially to regional diversity. Global Ecology and Biogeography, 18: 426–436.
Bennett, A. F.; Haslem, A.; Cheal, D. C.; Clarke, M. F.; Jones, R.N.; Koehn, J. D.; Lake, P. S.; Lumsden L. F.; Lunt, I. D.; Mackey, B. G.; Nally, R. M.; Menkhorst, P. W.; New, T. R.; Newell G. R.; O’Hara T.; Quinn G. P.; Radford, J. Q.; Robinson, D.; Watson, J. E. M. & Yen, A. L. 2009. Ecological processes: A key element in strategies for nature conservation. Ecological Management & Restoration, 10: 192–199.
Blake, J. G. & Loiselle, B.A. 1991. Variation in resource abundance affects capture rates of birds in three lowland habitats in Costa Rica. Auk, 108: 114–127.
Blendiger, P. G. 2005. Abundance and diversity of small-bird assemblages in the Monte desert, Argentina. Jounal of Arid Environments, 61: 567–587.
Blondel, J.; Ferry, C. & Frochot, B. 1970. La méthode des indices ponctuels d’abondance (I.P.A.) ou des relevés d’avifaune par “stations d’écoute”. Alauda, 38: 55–71.
Boss, R. L. 2009. Variações espaciais e temporais em comunidades de aves em uma savana amazônica no Estado do Amapá. MSc. Dissertation. Macapá: Universidade Federal do Amapá.
Cavalcanti, R. B. & Joly, C. A. 2002. Biodiversity and conservation priorities in the Cerrado Region, p. 351–367. In: Oliveira, P. S. & Marquis, R. J. (eds). The cerrados of Brazil. New York: Columbia University Press.
Chesser, R. T. 1994. Migration in South America: an overview of the austral system. Bird Conservation International, 4: 91–107.
Cintra, R. & Sanaiotti, T. 2005. Fire effects on the composition of a bird community in an Amazonian savanna (Brazil). Brazilian Jounal of Biology, 65: 683–695.
Cowling, R. M.; Pressey, R. L.; Lombard, A. I.; Desmet, P. G. & Ellis, A. G. 1999. From representation to persistence requirements for a sustainable system of conservation areas in the species rich mediterranean climate desert of southern Africa. Diversity and Distributions, 5: 51–71.
Coyle, J. R.; Hurlbert, A. H. & White, E. P. 2013. Opposing mechanisms drive richness patterns of core and transient bird species. The American Naturalist, 181: 83–90.
Dunning, J. B.; Danielson, B. J. & Pullian, H. R. 1992. Ecological processes that affect that affect populations in complex landscapes. Oikos, 65: 169–175.
Fuller, R. A.; Ladle, R. J.; Whittaker, R. J. & Possingham, H. P. 2011. Planning for Persistence in a Changing World, p. 164–189. In Ladle, R. J. & Whittaker, R. J. (eds). Conservation Biogeography. Oxford: Blackwell Publishing Ltd.
Furley, P. A. 2006. Tropical savannas. Progress in Physical Geography, 30: 105–121.
Grinnell, J. 1922. The role of the “accidental”. Auk 39:373–380.
Karr, J. R. 1976. Seasonality, resource availability and community diversity in tropical bird communities. The American Naturalist, 110: 973–994.
Karr, J. R. & Freemark, K. E. 1983. Habitat selection and environmental gradients: Dynamics in the ‘stable’ tropics. Ecological Monographs, 64: 1481–1494.
Karr, J. R. & Roth, R. R. 1971. Vegetation structure and avian diversity in several New World areas. The American Naturalist, 105: 423–435.
Loiselle, B. A. 1988. Bird abundance and seasonality in a Costa Rican lowland forest canopy. Condor, 90: 761–772.
Mac Arthur, R. H. & Mac Arthur, J. W. 1961. On bird species diversity. Ecology, 42: 594–598.
Magurran, A. E. 2007. Species abundance distributions over time. Ecology Letters, 10: 347–354.
Magurran, A. E. & Henderson, P. A. 2003. Explaining the excess of rare species in natural species abundance distributions Nature, 422: 714–716.
Maron, M.; Lill, A.; Watson, D. M. & Nally, R. M. 2005. Temporal variation in bird assemblages: How representative is a one-year snapshot? Austral Ecology, 30: 383–394.
Martin, T. E. & Karr, J. R. 1986. Temporal dynamics of Neotropical birds with special reference to frugivores in second-growth woods. The Wilson Bulletin, 98: 38–60.
Poulin, B.; Lefebvre, G. & McNeil, R. 2001. Variations in bird abundance in tropical arid and semi-arid habitats. Ibis, 135: 432–441.
Remsen, J. V.; Cadena, C.D.; Jaramillo, A.; Nores, M.; Pacheco J. F.; Pérez-Emán, J.; Robbins, M. B.; Stiles, F. G.; Stotz, D. F. & Zimmer, K. J. 2014. A classification of the bird species of South America. American Ornithologists’ Union. Disponível em <http://www.museum.lsu.edu/~Remsen/SACCBaseline.html>. Accessed January 2014.
Ricklefs, R. E. 2004. A comprehensive framework for global patterns in biodiversity. Ecology Letters, 7: 1–15.
Sanaiotti, T. M.; Bridgewater, S. & Rattes, J. A. 1997. A floristic study of the savanna vegetation of the state of Amapá, Brazil, and suggestions for its conservation. Boletim do Museu Paraense Emílio Goeldi, série Botânica, 13: 1–27.
Sanaiotti, T. & Cintra, R. 2001. Breeding and migration birds in an Amazonian savanna. Studies on Neotropical Fauna and Environment, 36: 23–32.
Sick, H. 1997. Ornitologia Brasileira. Rio de Janeiro: Nova Fronteira.
Silva, J. M. C. 1995. Birds of the cerrado region, South America. Steenstrupia, 21: 69–92.
Silva, J. M. C.; Uhl, C. & Murray, G. 1996. Plant succession, landscape management, and the ecology of frugivorous birds in abandoned pastures. Conservation Biology, 10: 491–503.
Silva, J. M. C.; Oren, D. C.; Roma, J. C. & Henriques, L. M. P. 1997. Composition and distribution patterns of the avifauna of an Amazonian upland savanna, Amapá, Brazil. Ornithological Monographs, 48: 743–762.
Silva, J. M. C. & Bates, J. M. 2002. Biogeograhic patterns and conservation in the South American Cerrado: a tropical savanna Hotspot. BioScience, 52: 225–233.
Silva, N. A. P.; Frizzas, M. R. & Oliveira, C. M. 2011. Seasonality in insect abundance in the “Cerrado” of Goiás State. Revista Brasileira de Entomologia, 55: 79–87.
Silvério, D. V. & Lenza, L. 2010. Fenologia de plantas lenhosas em um cerrado típico no Parque Municipal Bacabal, Nova Xavantina, Mato Grosso, Brasil. Biota Neotropica, 10: 205–216.
Tubelis, D. P. 2007. Mixed-species flocks of birds in the Cerrado, South America: A Review. Ornitologia Neotropical, 18: 75–97.
Tubelis, D. P. & Calvacanti, R. 2000. A comparison of bird communities in natural and disturbed non-wetland open habitats in the Cerrado’s central region, Brazil. Bird Conservation International, 10: 331–350.
Tubelis, D. P.; Cowling, A. & Donnelly, C. 2004. Landscape supplementation in adjacent savannas and its implications for the design of corridors for forest birds in the central Cerrado, Brazil. Biological Conservation, 118: 353–364.
Watson, J. E.; Grantham, H. S.; Wilson, K. A. & Possingham, H. P. 2011. Systematic conservation planning: Past, present and future, p. 136–160. In Ladle, R. J. & Whittaker, R. J. (eds). Conservation Biogeography. Oxford: Blackwell Publishing Ltd.
Wiens, J. A. 1977. On competition and variable environments. American Scientist, 65: 590–597.
Wiens, J. A. 1992. The Ecology of Bird Communities. Cambridge: Cambridge University Press.
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Boss, R.L., da Silva, J.M.C. Core and transient species in an Amazonian savanna bird assemblage. Rev. Bras. Ornitol. 22, 374–382 (2014). https://doi.org/10.1007/BF03544274
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DOI: https://doi.org/10.1007/BF03544274