To investigate the effects of forest fragmentation on genetic variation in Acer saccharum Marsh. (Aceraceae) populations, aflozyme variation in eight populations in fragmented forest patches was compared to variation in eight population samples from extensive continuous forest. Contrary to theoretical predictions, increased genetic drift and inbreeding have not led to reduced within-individual or within-population genetic variation in patch populations. Polymorphism and individual heterozygosity were slightly higher in patch than continuous forest populations. However, overall, founder effects may have resulted in the loss of six alleles in the fragmented forest system. Maintenance of genetic variation in patch populations may be because of the limited number of generations since fragmentation occurred, or because populations in patches have not been reduced below the size of normal breeding associations for A. saccharum. Comparison of the distribution of alleles among populations, between patch and continuous forest, suggests that the higher genetic variation in patch populations may be the result of increased interpopulation gene flow.
Bassett, I J. 1969. Airborne pollen dispersal of some trees and shrubs in the Ottawa district. Trail and Landscape, 3, 42–44.
Benzie, J W. 1959. Sugar maple and yellow birch seed dispersal from a fully stocked stand of mature northern hardwoods in the upper peninsula of Michigan. Lake States Forest Experiment Station Technical Note 561.
Billington, H L. 1991. Effect of population size on genetic variation in a dioecious conifer. Conserv Biol, 5, 115–119.
Cheliak, W M, and Pitel, J A. 1984. Techniques for starch gel electrophoresis of enzymes from forest tree species. Canadian Forestry Service Information Report PI-X-42.
Dirschl, H B. 1988. The use of the SEDFAL simulation model to estimate the past seed dispersal of Acer negundo, Acer saccharum, and Fraxinus americana trees in farmland south of Ottawa B.Sc. Hons Thesis, Carleton University.
Forcier, L K. 1973. Seedling pattern and population dynamics, and the reproductive strategies of sugar maple, beech and yellow birch at Hubbard Brook Ph.D. Thesis, Yale University.
Gabriel, W J. 1967. Reproductive behaviour in sugar maple: self-compatibility, cross-compatibility, agamospermy, and agamocarpy. Silvae Genetica, 16, 165–168.
Gabriel, W J. 1968. Dichogamy in Acer saccharum. Botanical Gazette, 129, 334–338.
Gabriel, W J, and Garrett, P W. 1984. Pollen vectors in sugar maple (Acer saccharum). Can J Botany, 62, 2889–2890.
Green, D S. 1980. The terminal velocity and dispersal of spinning samaras. Am J Botany, 67, 1218–1224.
Guries, R P, and Nordheim, E V. 1984. Flight characteristics and dispersal potential of maple samaras. Forest Sci, 30, 434–440.
Harris, L D. 1984. The Fragmented Forest: Island Biogeography Theory and the Preservation of Biotic Diversity. The University of Chicago Press, Chicago.
Johnson, W C. 1988. Estimating dispersibility of Acer, Fraxinus and Tilia in fragmented landscapes from patterns of seedling establishment. Landscape Ecol, 1, 175–187.
Kapos, V. 1989. Effects of isolation on the water status of forest patches in the Brazilian Amazon. J Trop Ecol, 5, 173–185.
Kephart, S R. 1990. Starch gel electrophoresis of plant isozymes: a comparative analysis of techniques. Am J Botany, 77, 693–712.
Kriebel, H B. 1957. Patterns of genetic variation in sugar maple. Research Bulletin Ohio Agricultural Experimental Station, 791, 1–55.
Ledig, F T, and Korbobo, D R. 1983. Adaptation of sugar maple populations along altitudinal gradients: photosynthesis, respiration, and specific leaf weight. Am J Botany, 70, 256–265.
Lelliot, M. 1987. Inheritance of eight enzyme systems in sugar maple (Acer saccharum Marsh). B.Sc. Hons Thesis, Lake-head University.
Logan, K T. 1965. Growth of tree seedlings as affected by light intensity: 1 White Birch, Yellow Birch, Sugar Maple and Silver Maple. Canadian Department of Forestry Publication No. 1121.
Lord, J M, and Norton, D A. 1990. Scale and the spatial concept of fragmentation. Conserv Biol, 4, 197–202.
McClenaghan, L R, and Beauchamp, A C. 1986. Low genetic differentiation among isolated populations of the California fan palm (Washingtonia filifera). Evolution, 40, 315–322.
Margules, C R, and Nicholls, A O. 1987. Assessing the conservation value of remnant habitat ‘islands’: mallee patches on the western Eyre Peninsula, South Australia. In: Saunders, D. A., Arnold, G. W., Burbidge, A. A. and Hopkins, A. J. M. (eds) Nature Conservation: the Role of Remnants of Native Vegetation, Surrey Beaty and Sons, Chipping Norton, pp. 89–102.
Marquis, D A. 1975. Seed storage and germination under northern hardwood forests. Can J Forest Res, 5, 478–484.
Middleton, J D. 1982. On certain spatial characteristics of the distribution of woodland species in farmland Ph.D. Thesis, Carleton University.
Mitton, J B, and Grant, M C. 1980. Observations on the ecology and evolution of quaking aspen, Populus tremuloides, in the Colorado front range. Am J Botany, 67, 202–209.
Moran, G F, and Hopper, S D. 1983. Genetic diversity and the insular population structure of the rare granite rock species, Eucalyptus caesia Benth. Aust J Botany, 31, 161–172.
Nei, M. 1987. Molecular Evolutionary Genetics. Columbia University Press, New York.
Nigh, T A, Pallardy, S G, and Garrett, H E. 1985. Sugar maple-environment relationships in the River Hills and Central Ozark Mountains of Missouri. The American Midland Naturalist, 114, 235–251.
Perry, D J, and Knowles, P. 1989. Allozyme variation in sugar maple at the northern limit of its range in Ontario, Canada. Can J Forest Res, 19, 509–514.
Polans, N O, and Allard, R W. 1989. An experimental evaluation of the recovery potential of ryegrass populations from genetic stress resulting from restriction of population size. Evolution, 43, 1320–1324.
Roff, D A, and Bentzen, P. 1989. The statistical analysis of mitochondrial DNA polymorphisms: Chi-square and the problem of small samples. Molec Biol Evol, 6, 539–545.
Sampson, J F, Hopper, S D, and James, S H. 1988. Genetic diversity and the conservation of Eucalyptus crucis Maiden. Aust J Botany, 36, 447–460.
Saunders, D A, Hobbs, R J, and Margules, C R. 1991. Biological consequences of ecosystem fragmentation: a review. Conservation Biol, 5, 18–32.
Sharpe, D M, and Fields, D E. 1982. Integrating the effects of climate and seed fall velocities on seed dispersal by wind: a model and application. Ecol Modelling, 17, 297–310.
Sokal, R R, and Rohlf, F J. 1981. Biometry. Freeman and Company, New York.
Templeton, A R, Shaw, K, Routman, E, and Davis, S K. 1990. The genetic consequences of habitat fragmentation. Annals of the Missouri Botanical Garden, 77, 13–27.
Wales, B A. 1967. Climate, microclimate and vegetation relationships on north and south forest boundaries in New Jersey. The William L Hutcheson Memorial Forest Bulletin, 2, 1–60.
Weeden, N F, and Wendel, J F. 1989. Genetics of plant isozymes. In: Soltis, D. E. and Soltis, P. S. (eds) Isozymes in Plant Biology Dioscorides, Portland, pp. 46–72.
Weir, B S. 1990. Genetic Data Analysis. Sinauer Associates, Sunderland.
Westman, W E. 1968. Invasion of fir forest by sugar maple in Itasca Park, Minnesota. Bulletin of the Torrey Botanical Club, 95, 172–186.
Wilcove, D S. 1987. From fragmentation to extinction. Natural Areas J, 7, 23–29.
Wright, S. 1946. Isolation by distance under diverse systems of mating. Genetics, 31, 39–59.
Wright, S. 1965. The interpretation of population structure by F-statistics with special regard to systems of mating. Evolution, 19, 395–420.
Wright, S. 1978. Evolution and the Genetics of Populations, Vol. 4. Variability Within and Among Natural Populations. University of Chicago Press, Chicago.
Young, A G. 1988. The ecological significance of the edge effect in a fragmented forest landscape M.Sc. Thesis, University of Auckland.
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Young, A., Merriam, H. & Warwick, S. The effects of forest fragmentation on genetic variation in Acer saccharum Marsh. (sugar maple) populations. Heredity 71, 277–289 (1993). https://doi.org/10.1038/hdy.1993.136
- Acer saccharum
- forest fragmentation
- gene flow
- genetic variation
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