, Volume 22, Issue 1, pp 90–99 | Cite as

Anuran call surveys on small wetlands in Prince Edward Island, Canada restored by dredging of sediments

  • Cameron E. Stevens
  • Antony W. Diamond
  • T. Shane Gabor


In 1990, the North American Waterfowl Management Plan (NAWMP) implemented a small-wetland restoration program in Prince Edward Island (PEI), Canada. Wetlands were restored by means of dredging accumulated sediment and organic debris to create open water and emulate pre-disturbance conditions. Three call surveys were conducted in the spring and summer of 1998 and 1999 to estimate abundance and occurrence of spring peepers (Pseudacris crucifer), wood frogs (Rana sylvatica), northern leopard frogs (Rana pipiens), American toads (Bufo americanus), and green frogs (Rana clamitans) on restored and reference wetlands. Numbers of species calling and abundance indices of northern leopard frogs green frogs and spring peepers were significantly higher on restored versus reference wetlands. The number of species calling in restored wetlands was positively correlated with proximity to freshwater rivers; in reference wetlands, the number was positively associated with forested perimeters and area of open water. Occurrence of calling green frogs in restored wetlands was positively correlated with percent cattail and, in reference wetlands, with proximity to other wetlands. Our results suggest that small wetland restoration projects may be a good conservation tool for anurans. We recommend further research on reproductive success and on local population trends in restored wetlands to determine if restoration is beneficial for anurans on PEI.

Key words

wetland restoration small wetland NAWMP anuran call survey Marsh Monitoring Program 


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Literature cited

  1. Anonymous. 1992. 1990/92 Prince Edward Island Forest Inventory Summary. Silviculture and Development Section, Forestry Branch, Department of Energy and Forestry. Charlottetown, PEI, Canada.Google Scholar
  2. Anonymous. 1995. North American Amphibian Monitoring Program. U. S. Geological Survey, Patuxtent Wildlife Research Center [on-line]. Available: http// [August 12, 2001].Google Scholar
  3. Anonymous. 1997. Marsh Monitoring Program Training Kit. Long Point Bird Observatory and Environment Canada. Great Lakes Protection Fund. Port Rowan, ON, Canada.Google Scholar
  4. Anonymous. 2001. The Green Lane. Environment Canada Atlantic Region [on-line]. available: [Nov. 15, 2001].Google Scholar
  5. Anonymous. 1999. PEI Department of Fisheries and Environment, PEI Department of Agriculture and Forestry, Environment Canada, and Agriculture and Agrifood Canada. The best management practices for soil Conservation for Potato Production. Charlottetown, PEI, Canada.Google Scholar
  6. Ambrose, N. E. and C. A. Paszkowski. 1998. The effect of timing of cattle grazing on amphibian abundance in central Alberta ponds. Canadian Association of Herpetology Bulletin 12:12–13.Google Scholar
  7. Anderson, A. M., D. A. Haukos, and J. T. Anderson. 1999. Habitat use by anurans emerging and breeding in playa wetlands. Wildlife Society Bulletin 27:759–769.Google Scholar
  8. Babbitt, K. J. and G. W. Tanner. 1998. Effects of cover and predator size on survival and development of Rana utricularia tadpoles. Oecologia 114:258–262.CrossRefGoogle Scholar
  9. Baker, J. M. R. and T. R. Halliday. 1999. Amphibian colonization of new ponds in an agricultural landscape. Herpetological Journal 9:55–63.Google Scholar
  10. Baker, B. and G. L. Laverick. 1986. Garden ponds as amphibian breeding sites in a conurbation in the north east of England (Sunderland, Tyne and Wear). Herpetological Journal 1:44–50.Google Scholar
  11. Barinaga, M. 1990. Where have all the froggies gone? Science 147:1033–34.CrossRefGoogle Scholar
  12. Beebee, T. J. C. 1979. Habitats of the British amphibians: suburban parks and gardens. Biological Conservation 15:241–257.CrossRefGoogle Scholar
  13. Beebee, T. J. C. 1985. Discriminant analysis of amphibian habitat determinants in South-East England. Amphibia-Reptilia 6:35–43.CrossRefGoogle Scholar
  14. Berrill, M., S. Bertram, and B. Pauli. 1997. Effects of pesticides on amphibian embryos and larvae. Herpetological Conservation 1:233–245.Google Scholar
  15. Berven, K. A. and T. A. Grudzien. 1990. Dispersal in the wood frog (Rana sylvatica): implications for genetic population structure. Evolution 44:2047–2056.CrossRefGoogle Scholar
  16. Bishop, C. A., N. A. Mahony, J. Struger, P. NG, and K. E. Pettit. 1999. Anuran development, density, and diversity in relation to agricultural activity in the Holland River watershed, Ontario, Canada (1990–1992). Environmental Monitoring and Assessment 57:21–43.CrossRefGoogle Scholar
  17. Conover, W. J. and R. L. Iman. 1981. Rank transformations as a bridge between parametric and nonparametric statistics. The American Statistician 35:124–133.CrossRefGoogle Scholar
  18. Cook, F. R. 1967. An analysis of the herpetofauna of Prince Edward Island. Natinal Museum of Canada. Ottawa, ON, Canada. Bulletin No. 212, Biological Series No. 75.Google Scholar
  19. Cook, F. R. 1984. Introduction to Canadian Amphibians and Reptiles. Natinal Museums of Canada. Ottawa, ON, Canada.Google Scholar
  20. Cooke, A. S. 1975. Spawn site selection and colony size of the frog (Rana temporaria) and the toad (Bufo bufo). Journal of Zoology, London 175:29–38.CrossRefGoogle Scholar
  21. Corn, P. S. 1975. Straight-line drift and pitfall traps. p. 109–118. In W. A. Heyer, M. A. Donnelly, R. W. McDiarmid, L. C. Hayek, and M. S. Foster (eds.) Measuring and Monitoring Biological Diversity: Standard Methods for Amphibians. Smithsonian Institution Press, Washington, DC, USA.Google Scholar
  22. Corn, P. S. and R. B. Bury. 1989. Logging in western Oregon: responses of headwater habitats and stream amphibians. Forest Ecology and Management 29:39–57.CrossRefGoogle Scholar
  23. Cowardin, L. M., V. Cater, F. C. Golet, and E. T. Laroe. 1979. Classification of wetlands and deepwater habitats of the United States. U. S. Fish and Wildlife Service, Washington, DC, USA. OBS-79/31.Google Scholar
  24. Crump, M. L. and N. J. Scott, Jr. 1994. Visual encounter surveys. p. 84–91. In W. A. Heyer, M. A. Donnelly, R. W. McDiarmid, L. C. Hayek, and M. S. Foster (eds.) Measuring and Monitoring Biological Diversity: Standard Methods for Amphibians. Smithsonian Institution Press, Washington, DC, USA.Google Scholar
  25. Cunjak, R. A. 1986. Winter habitat of northern leopard frogs, Rana pipiens, in a southern Ontario stream. Canadian Journal of Zoology 64:255–257.CrossRefGoogle Scholar
  26. DeMaynadier, P. G. and M. L. Hunter, Jr. 1999. Forest canopy closure and juvenile emigration by pool-breeding amphibians in Maine. Journal of Wildlife Management 63:441–450.CrossRefGoogle Scholar
  27. Erskine, A. J. 1992. Atlas of Breeding Birds of the Maritime Provinces. Nimbus Publications Ltd. and Nova Scotia Museum, Halifax, NS, Canada.Google Scholar
  28. Findlay, C. S. and J. Houlahan. 1996. Anthropogenic correlates of species richness in southeastern Ontario wetlands. Conservation Biology 11:1000–1009.CrossRefGoogle Scholar
  29. Gibbs, J. P. 1993. Importance of small wetlands for the persistence of local populations of wetland-associated animals. Wetlands 13:25–31.Google Scholar
  30. Gilhen, J. 1984. Amphibians and Reptiles of Nova Scotia. Nova Scotia Museum, Halifax, NS, Canada.Google Scholar
  31. Gill, D. E. 1978. The metapopulation ecology of the red-spotted newt, Notophthalmus viridescens (Rafinesque). Ecological Monographs 48:145–166.CrossRefGoogle Scholar
  32. Green, D. M. 1997. Perspectives on amphibian population declines: Defining the problem and searching for answers. Herpetological Conservation 1: 291–308.Google Scholar
  33. Hecnar, S. J. 1995. Acute and chronic toxicity of ammonium nitrate fertilizer to amphibians from southern Ontario. Environmental and Toxicological Chemistry 14:2131–2137.CrossRefGoogle Scholar
  34. Hecnar, S. J. and R. T. M’Closkey. 1996. Amphibian species richness and distribution in relation to pond water chemistry in southwestern Ontario, Canada. Freshwater Biology 36:7–15.CrossRefGoogle Scholar
  35. Hecnar, S. J. and R. T. M’Closkey. 1997a. The effects of predatory fish on amphibian species richness and distribution. Biological Conservation 79:123–131.CrossRefGoogle Scholar
  36. Hecnar, S. J. and R. T. M’Closkey. 1997b. Spatial scale and determination of species status of the green frog (Rana clamitans melanota). Conservation Biology 11:670–682.CrossRefGoogle Scholar
  37. Hecnar, S. J. and R. T. M’Closkey. 1998. Species richness patterns of amphibians in southwestern Ontario ponds. Journal of Biogeography 25:63–772.CrossRefGoogle Scholar
  38. Jeffries, M. 1991. The ecology and conservation value of forestry ponds in Scotland, United Kingdom. Biological Conservation 58:191–211.CrossRefGoogle Scholar
  39. Keddy, P. 1999. Wetland restoration: the potential for assembly rules in the science of conservation. Wetlands 19:716–732.CrossRefGoogle Scholar
  40. Kiviat, E. and J. Stapleton. 1983. Bufo Americanus (American Toad), estuarine habitat. Herpetological Review 14:46.Google Scholar
  41. Kleinbaum, D. 1994. Logistic Regression: a Self-Learning Text. Springer-Verlag, New York, NY, USA.Google Scholar
  42. Klemens, M. W., E. Kiviat, and R. E. Schmidt. 1987. Distribution of the northern leopard frog, Rana pipiens, in the lower Hudson and Housatonic river valleys. Northeastern Environmental Science 6:99–101.Google Scholar
  43. Lepage, M., R. Courtois, C. Daigle, and S. Matte. 1997. Surveying calling anurans in Quebec using volunteers. Herpetological Conservation 1:141–148.Google Scholar
  44. McAlpine, D. F. and T. G. Dilworth. 1989. Microhabitat and preysize among three species of Rana (Anura: Ranidae) sympatric in eastern Canada. Canadian Journal of Zoology 6:2244–2252.CrossRefGoogle Scholar
  45. McAlpine, D. F., T. J. Fletcher, S. W. Gorham, and I. T. Gorham. 1991. Distribution and habitat of the Tetraploid Gray Treefrog, Hyla versicolor, in New Brunswick and eastern Maine. Canadian Field Naturalist 105:526–529.Google Scholar
  46. McAlpine, D. F. 1997. Historical evidence does not suggest New Brunswick amphibians have declined. Herpetological Conservation 1:117–127.Google Scholar
  47. Ouellet, M. J., J. Bonin, J. Rodrigue, J. Desgranges, and S. Lair. 1997. Hindlimb deformities (ectromelia, ectrodactyly) in free-living anurans from agricultural habitats. Journal of Wildlife Diseases 33:95–104.PubMedGoogle Scholar
  48. Pechmann, J. H. K., D. E. Scott, J. W. Gibbons, and R. D. Semlitsch. 1989. Influence of wetland hydroperiod on diversity and abundance of metamorphosing juvenile amphibians. Wetland Ecology and Management 1:3–11.CrossRefGoogle Scholar
  49. Pechmann, J. H. K., D. E. Scott, R. D. Semlitsch, J. P. Caldwell, L. J. Vitt, and J. W. Gibbons. 1991. Declining amphibian populations: the problem of separating human impacts from natural fluctuations. Science 253:892–894.CrossRefPubMedGoogle Scholar
  50. Perison, D., J. Phelps, C. Pavel, and R. Kellison. 1997. The effects of timber harvest in a South Carolina blackwater bottomland. Forest Ecology and Management 90:171–185.CrossRefGoogle Scholar
  51. Pulliam, R. H. 1988. Sources, sinks, and population regulation. American Naturalist 132:652–661.CrossRefGoogle Scholar
  52. Rotenberry, J. T. and J. A. Wiens. 1980. Habitat structure, patchiness, and avian communities in North American steppe vegetation: a multivariate analysis. Ecology 61:1228–1250.CrossRefGoogle Scholar
  53. Rowe, J. S. 1972. Forest regions of Canada. Canadian Forestry Service, Ottawa, ON, Canada. No. 1300.Google Scholar
  54. Semlitsch, R. D. and J. R. Bodie. 1998. Are small, isolated wetlands expendable? Conservation Biology 12:1129–1133.CrossRefGoogle Scholar
  55. Shirose, L. J., C. A. Bishop, D. M. Green, C. J. MacDonald, R. J. Brooks, and N. J. Helferty. 1997. Validation tests of an amphibian call count survey technique in Ontario, Canada. Herpetologica 53:312–320.Google Scholar
  56. Sjögren-Gulve, P. 1994. Distribution and extinction patterns within a northern metapopulation of the pool frog. Rana lessonae. Ecology 75:1357–1367.CrossRefGoogle Scholar
  57. Stevens, C. E., T. S. Gabor, and A. W. Diamond. 2003. Use of restored small wetlands by breeding waterfowl in Prince Edward Island, Canada. Restoration Ecology 11:(in press).Google Scholar
  58. Van Horne, B. 1983. Density as a misleading indicator of habitat quality. Journal of Wildlife Management 47:893–901.CrossRefGoogle Scholar
  59. Wake, D. B. 1991. Declining amphibian populations. Science 253:860.CrossRefPubMedGoogle Scholar
  60. Warwick, T. 1949. The colonization of bomb-crater ponds at Marlow, Buckinghamshire. Journal of Animal Ecology 18:137–141.CrossRefGoogle Scholar
  61. World Meteorological Organization. 1970. The Beaufort Scale of wind force. WMO Commission for Maritime Meteorology, Marine Sciences Affairs Report 3:1–22.Google Scholar
  62. Zar, J. H. 1999. Biostatistical Analysis, fourth edition. Prentice Hall. Upper Saddle River, New Jersey, USA.Google Scholar

Copyright information

© Society of Wetland Scientists 2002

Authors and Affiliations

  • Cameron E. Stevens
    • 1
  • Antony W. Diamond
    • 2
  • T. Shane Gabor
    • 3
  1. 1.Department of Biological SciencesUniversity of AlbertaEdmontonCanada
  2. 2.Atlantic Cooperative Wildlife Ecology Research NetworkUniversity of New BrunswickFrederictonCanada
  3. 3.Institute for Wetlands and Waterfowl ResearchDucks Unlimited CanadaStonewallCanada

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