Abstract
In a comparative study we investigated woodpecker abundance in forest landscapes with different proportion of native pine forest and spruce plantations in western Norway. In 100 circular study plots of 100 ha each we recorded 38 white-backed –Dendrocopos leucotos, 22 grey-headed –Picus canus, 13 great spotted –Dendrocopos major, 6 green –Picus viridis, and 2 lesser spotted –Dendrocopos minor woodpeckers in the breeding season. The mean number of recorded woodpecker species peaked at 20–40% spruce plantations. The two most common species in the study, the white-backed and the grey-headed woodpeckers are both Red-listed species in Norway and among the rarest woodpeckers in Europe. The white-backed woodpecker preferred plots with higher than average proportions of standing dead trees and deciduous trees, and low proportions of spruce plantations in the plots. The grey-headed woodpecker preferred plots in the western (coastal) parts of the study area with presence of large aspen Populus tremula trees. Logistic regression models did not reveal any clear threshold values with respect to proportion of spruce plantations in plots, although both woodpecker species were extremely rare in plots with >60% spruce plantations. We recommend spruce plantations to be kept at moderate levels to ensure viable populations of woodpeckers in western Norway.
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References
Angelstam P. 1990. Factors determining the composition and persistence of local woodpecker assemblages in taiga forest in Sweden — a case for landscape ecological studies. In: Carlsson A. and Aulén G. (eds) Conservation and Management of Woodpecker Populations. Report 17. Department of Wildlife Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden, pp. 147–164.
Angelstam P. and Mikusinski G. 1994. Woodpecker assemblages in natural and managed boreal and hemiboreal forest — a review. Annales Zoologici Fennici 31: 157–172.
Aulén G. 1988. Ecology and distribution of the white-backed woodpecker Dendrocopos leucotos in Sweden. Report 14. Department of Wildlife Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Aulén G. 1991. Increasing insect abundance by killing deciduous trees: a method of improving the food situation for endangered woodpecker species. Holarctic Ecology 14: 68–80.
Aune E.I. 1977. Scandinavian pine forests and their relationship to the Scottish pinewoods. In: Bunce R.G.H. and Jeffers J.N.R. (eds) Native Pinewoods of Scotland. Cambridge University Press, Cambridge, UK, pp. 5–9.
Aune B. 1993. National Atlas of Norway, map 3.1.6, Monthly Temperature. Statens Kartverk, Hønefoss, Norway.
Bjørbæk G. 1993. National Atlas of Norway, map 3.1.4, Snow. Statens Kartverk, Hønefoss, Norway.
Carlson A. 2000. The effect of habitat loss on a deciduous forest specialist species: the white-backed woodpecker (Dendrocopos leucotos). Forest Ecology and Management 131: 215–221.
Carlson A. and Aulén G. 1992. Territorial dynamics in an isolated white-backed woodpecker (Dendrocopos leucotos) population. Conservation Biology 6: 450–454.
Carlson A. and Stenberg I. 1995. Vitryggig hackspett (Dendrocopos leucotos). Biotopval och sårbarhetsanalys. Report 14. Department of Wildlife Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Cramp S. (ed). 1985. The Birds of the Western Palaearctic. Vol. IV. Oxford University Press, Oxford, UK.
Dobson A.J. 2001. An Introduction to Generalized Linear Models. 2nd edn. Chapman & Hall, London.
Førland E. 1993. National Atlas of Norway, map 3.1.1, Annual Precipitation. Statens Kartverk, Hønefoss, Norway.
Gjerde I. 1993. The introduction of spruce plantations into the natural forests of south-western Norway and the effects on the availability and distribution of animal habitats (in Norwegian with English summary). Research paper of Skogforsk 17/93.
Gjerde I. and Sætersdal M. 1997. Effects on avian diversity of introducing spruce Picea spp. plantations in the native pine Pinus sylvestris forests of western Norway. Biological Conservation 79: 241–250.
Gjerde I., Rolstad J. and Rinden H. 1992. The white-backed woodpecker (Dendrocopos leucotos) in south-eastern Norway: effects of changes in agricultural and silvicultural practice on breeding habitat and population size (in Norwegian with English summary). Research paper of Skogforsk 15/92, pp. 1–42.
Hågvar S., Hågvar G. and Mønness E. 1990. Nest site selection in Norwegian woodpeckers. Holarctic Ecology 13: 156–165.
Haåland A. and Toft G.O. 1983. Status and breeding habitat of the white-backed woodpecker in western Norway (in Norwegian with English summary). Vår Fuglefauna 6: 3–14.
Hogstad O. and Stenberg I. 1994. Habitat selection of a viable population of white-backed woodpeckers Dendrocopos leucotos. Fauna norv. Ser. C., Cinclus 17: 75–94.
Jansson G. and Angelstam P. 1999. Threshold levels of habitat composition for the presence of the long-tailed til (Aegithalos caudatus) in a boreal landscape. Landscape Ecology 14: 283–290.
Mittlbock M. and Schemper M. 1996. Explained variation for logistic regression. Statistics in Medicine 15: 1987–1997.
Nagelkerke N.J.D. 1991. A note on a general definition of the coefficient of determination. Biometrika 78: 691–692.
Nilsson S.G., Olsson O., Svensson S. and Wiktander U. 1992. Population trends and fluctuations in Swedish woodpeckers. Ornis Svecica 2: 13–21.
Norwegian Directorate for Nature Management 1999. Norwegian Red List 1998. DN-rapport 3, Trondheim, Norway (in Norwegian with English summary).
Radford J.Q. and Bennett A.F. 2004. Thresholds in landscape parameters: occurrence of the white-browed treecreeper Climacteris affinis in Victoria, Australia. Biological Conservation 117: 375–391.
Rolstad J. and Rolstad E. 1995. Seasonal patterns in home range and habitat use of the grey-headed woodpecker (Picus canus) as influenced by the availability of food. Ornis Fennica 72: 1–13.
Spitznagel A. 1990. The influence of forest management on woodpecker density and habitat use in floodplain forests of the upper Rhine Valley. In: Carlson A. and Aulén G. (eds) Conservation and Management of Woodpecker Populations. Report 17. Department of Wildlife Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden, pp. 147–164.
Stenberg I. 1996. Nest site selection in six woodpecker species. Fauna norv. Ser. C, Cinclus 19: 21–38.
Stenberg I. and Hogstad O. 1992. Habitat use and density of breeding woodpeckers in the 1990’s in Møre og Romsdal county, western Norway. Fauna norv. Ser. C, Cinclus 15: 49–61.
Tomter S.T. 2000. Skog 2000. Statistics of Forest Conditions and Resources in Norway. Norwegian Institute of Land Inventory, Ås, Norway.
Venables W.N. and Ripley B.D. 2002. Modern Applied Statistics with S-PLUS. 4th edn. Springer Verlag, New York.
Villard M.-A., Trzcinski M.K. and Merriam G. 1999. Fragmentation effects on forest birds: relative influence of woodland cover and configuration on landscape occupancy. Conservation Biology 13: 774–783.
Virkkala R., Alanko T., Laine T. and Tiainen J. 1993. Population contraction of the white-backed woodpecker Dendrocopos leucotos in Finland as a consequence of habitat alteration. Biological Conservation 66: 47–55.
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Gjerde, I., Sætersdal, M. & Nilsen, T. Abundance of two threatened woodpecker species in relation to the proportion of spruce plantations in native pine forests of western Norway. Biodivers Conserv 14, 377–393 (2005). https://doi.org/10.1007/s10531-004-6065-y
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DOI: https://doi.org/10.1007/s10531-004-6065-y