Fragmentation of habitats used by neotropical migratory birds in Southern Appalachians and the neotropics (original) (raw)

Abstract

Recent declines in North American breeding bird populations have sparked great concern over the effects of habitat fragmentation. Neotropical migrant birds use and are influenced by two biomes during a single life span. Yet assessment of the relative importance of changes in tropical wintering areas versus temperate breeding areas is complicated by regional variation in rates and extent of habitat change. Landscape-level measurements of forest fragmentation derived from remotely-sensed data provide a means to compare the patterns of habitat modification on the wintering and breeding grounds of migrant birds. This study quantifies patterns of forest fragmentation in the Southern Appalachian Mountains and tropical Amazon and relates these patterns to the resource needs of neotropical migrant birds. Study sites were selected from remotely-sensed images to represent a range of forest fragmentation (highly fragmented landscape to continuous forest).

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References (13)

  1. ANDREN, H. and P. ANGELSTAM. 1988. Elevated predation rates as an edge effect in habitat islands: experimental evidence. Ecology 69:544-547.
  2. DELLASALA, D. A. and D. L. RABE. 1987. Response of Least Flycatchers Empidonax minimus to forest disturbances. Biol. Conserv. 41:291-299.
  3. DUESER, R. D., J. L. DOOLEY, JR., and G. J. TAYLOR. 1988. Habitat structure, forest composition and landscape dimensions as components of habitat suitability for the Delmarva fox squirrel. Pp. 414-421 in R. C. Szaro, K. E. Severson, and D. R. Patton, (eds.). Management of amphibians, reptiles, and small mammals in North ba'nerica. USDA Forest Service Gen. Tech. Rep. RM-166.
  4. FREEMARK, K. E. and H. G. MERRIAM. 1986. Importance of area and habitat heterogeneity to bird assemblages in te_perate forest fragments. Biol. C_ _serv. 36:115-141.
  5. HAGAN, J. M., III, and D. W. JOHNSON, eds. 1992. Ecology and conservation of neotropical migrant landbirds. Smithsonian Institution Press; Washington, D.C.
  6. NEWMARK, W. D. 1991. Tropical forest fragmentation and the local extinction of understory birds in the Eastern Usambara Mountains, Tanzania. Conserv. Biol. 5:67-78.
  7. O'NEILL, R.V., J.R. KRUMMEL, R.H. GARDNER, G. SUGIHARA, B. JACKSON, D.L. DEANGELIS, B.T. MILNE, M.G. TURNER, B. ZYGMNUHT, S.W. CHRISTENSEN. v.H. DALE, and R.L. GRAHAM. 1988. Indices of landscape pattern. Landscape Ecology 1:153-162.
  8. PEARSON, S. M. 1993. The spatial extent and relative influence of landscape-level factors on wintering bird populations. Landscape Ecol. 8:3-18.
  9. PEARSON, S. M., M. G. TURNER, R. H. GARDNER, and R. V. O'NEILL. In Press. An organism- based perspective of habitat fragmentation. In R. C. Szaro (ed), Biodiversity in Managed Landscapes: Theory and Practice. Oxford University Press.
  10. PUNTHLA, P., V. HAILA, T. PAJUNEN, and H. TUKIA. 1991. Colonisation of clear'cut forests b_,ants in the southern Finnish taiga: a quantitative survey. Oikos 61:250-262.
  11. QUINN, J. F. and A. HASTINGS. 1987. Extinction in subdivided habitats. Conserv. Biol. 1:198-2_1_.
  12. VAN DORP, D. and P. F. M. OPDAM. 1987. Effects of patch size, isolation, and regional abundance on forest bird communities. Landscape Ecol. 1:59-73.
  13. ROBBINS, C. S., J. R. SAUER, R. S. GREENBERG, and S. DROEGE. 1989. Population decltnc, _n North American birds that migrate to the neotropics. Proc. Natl. Acad. Sci. 86:7658-7662