Summary
The effect of forest size on avian diversity was studied in oak forest patches in rural New Jersey. Number of bird species continued to increase significantly in old oak woods up through 40 ha. This was due to the progressive addition of carnivorous species with increasing minimum forest size requirements. One large woodlot had more species than the same area subdivided into smaller woodlots. To maintain maximum regional diversity more than three large forests are required. Primary land use priority should be to protect large forests. Second priority should be to maintain a high density of small woodlots.
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References
Brown, J.H.: Mammals on mountain tops: nonequilibrium insular biogeography. Amer. Nat. 105, 467–478 (1971)
Bull, J.: Birds of the New York area, pp. 1–540. New York: Harper and Row 1964
Cain, S.A., Castro, G.M. de O.: Manual of vegetation analysis, pp. 165–177. New York: Harper 1959
Check-list of North American Birds, pp. 1–691. Chicago: Amer. Ornithol. Union 1957
Diamond, J.M.: Avifaunal equilibrium and species turnover rates on the Channel Islands of California. Proc. Nat. Acad. Sci. (Wash.) 64, 57–63 (1969)
Diamond, J.M.: Distributional ecology of New Guinea birds. Science 179, 759–769 (1973)
Elfstrom, B.A.: Tree species diversity and forest island size on the Piedmont of New Jersey, pp. 1–55. M.S. thesis, Rutgers University, New Brunswick, New Jersey (1974)
Emlen, J.T.: Population densities of birds derived from transect counts. Auk 88, 323–342 (1971)
Forman, R.T.T.: Growth under controlled conditions to explain the hierarchical distributions of a moss, Tetraphis pellucida. Ecol. Monogr. 34, 1–25 (1964)
Forman, R.T.T., Elfstrom, B.A.: Forest structure comparison of Hutcheson Memorial Forest and eight old woods on the New Jersey Piedmont. Hutcheson Mem. For. Bull. 3, 44–51 (1975)
Galli, A.E.: Bird species diversity and the size of oak woods in central New Jersey. M.S. thesis, pp. 1–61, Rutgers University, New Brunswick, New Jersey (1974)
Galli, A.E., Leck, C.F., Forman, R.T.T.: Avian distribution patterns within different sized forest islands in central New Jersey. Auk 93, 356–365 (1976)
Goodall, D.W.: Quantitative aspects of plant distribution. Biol. Rev. 27, 194–245 (1952)
Greig-Smith, P.: Quantitative plant ecology, pp. 151–157. London: Butterworth 1964
Harper, J.L.: The role of predation in vegetational diversity. In: Diversity and stability of ecological systems (G.M. Woodwell, ed.), pp. 48–61. New York: Brookhaven Nat. Lab. 1969
Janzen, D.N.: Herbivores and the number of tree species in tropical forests Amer. Nat. 104, 501–528 (1970)
Johnson, M.P., Mason, L.G., Raven, P.H.: Ecological parameters and plant species diversity. Amer. Nat. 102, 297–306 (1968)
Johnston, V.R.: Breeding birds of the forest edge in Illinois. Condor 49, 45 (1947)
Koopman, K.F.: Land bridges and ecology in bat distribution on islands off the northern coast of South America. Evol. 12, 429–439 (1958)
Kricher, J.C.: Bird species diversity: the effect of species richness and equitability on the diversity index. Ecol. 53, 278–282 (1972)
Lack, D.: Ecological adaptation for breeding in birds, pp. 1–409. London: Methuen 1968
Leck, C.F.: Recent records on the avifauna of Hutcheson Memorial Forest. Wm. L. Hutcheson Mem. For. Bull. 2, 25 (1971)
Leck, C.F.: The birds of New Jersey, pp. 1–370. New Brunswick, N.J.: Rutgers Univ. Press 1975
MacArthur, R.H., Wilson, E.O.: The theory of island biogeography, p. 1–203. Princeton, N.J.: Princeton Univ. Press 1967
May, R.M.: Stability and complexity in model ecosystems, pp. 1–235. Princeton, N.J.: Princeton Univ. Press 1973
Opler, P.A.: Oaks as evolutionary islands for leaf-mining insects. Amer. Sci. 62, 67–73 (1974)
Paine, R.T.: Food web complexity and species diversity. Amer. Nat. 100 65–75 (1966)
Paine, R.T.: A short term experimental investigation of resource partitioning in a New Zealand rocky intertidal habitat. Ecol. 52, 1096–1106 (1971)
Schoener, T.W.: Sizes of feeding territories among birds. Ecol. 49, 123–141 (1968)
Simberloff, D.S., Wilson, E.O. Experimental zoogeography of islands. A two-year record of colonization. Ecol. 51, 934–937 (1970)
Simpson, B.B.: Glacial migrations of plants: island biogeographic evidence. Science 185, 698–700 (1974)
Slobodkin, L.B.: Experimental populations of Hydrida. J. Ecol., 52 (Suppl.) 131 (1964)
Sullivan, A.L., Shaffer, M.L.: Biogeography of the megazoo. Science 189, 13 (1975)
Swinebroad, J.: Annotated list of the birds of Hutcheson Forest. Bull. N.J. Acad. Sci 7 (2), 1–6 (1962)
Terborgh, J.: On the notion of favorableness in plant ecology. Amer. Nat. 107, 481–501 (1973)
Terborgh, J.: Preservation of natural diversity: the problem of extinction prone species. Bioscience 24, 715–722 (1974)
Terborgh, J.: Fauna equilibria and the design of wildlife preserves. In: Tropical ecological systems (F.B. Golley, E. Medina, eds.), pp. 369. Berlin-Heidelberg-New York: Springer 1975
The Auk: 32nd Suppl. 90, 411 (1973)
Tramer, E.J.: Bird species diversity: components of Shanon's formula. Ecol. 50, 927–929 (1969)
Vestal, A.G.: Minimum areas for different vegetations: their determination from species-area curves. Univ. Ill. Biol. Monogr. 20, 1 (1949)
Vestal, A.G., Heermans, M.F.: Size requirements for reference areas in mixed forest. Ecol. 26, 122–134 (1945)
Vuilleumier, F.: Insular biogeography in continental regions. I. The northern Andes of South America. Amer. Nat. 104, 373–388 (1970)
Wales, B.A.: Vegetational analysis of north and south edges in a mature oak-hickory forest. Ecol. Monogr. 42, 451–471 (1972)
Whittaker, R.H.: Vegetation of the Siskiyou Mountains, Oregon and California. Ecol. Monogr. 30, 279–338 (1960)
Wilson, E.O.: The species equilibrium. Brookhaven Symp. Biol. 22, 38–47 (1969)
Wilson, E.O., Simberloff, D.S.: Experimental zoogeography of islands: defaunation and monitoring techniques. Ecol. 50, 267–278 (1969)
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Forman, R.T.T., Galli, A.E. & Leck, C.F. Forest size and avian diversity in New Jersey woodlots with some land use implications. Oecologia 26, 1–8 (1976). https://doi.org/10.1007/BF00345649
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DOI: https://doi.org/10.1007/BF00345649