Abstract
This study compared the bird assemblages of native semi-natural woodlands and non-native Sitka spruce (Picea sitchensis) plantations in Ireland to identify what vegetation variables most influenced birds and to identify management targets in plantations to maximise future bird conservation. Point counts were conducted in 10 Oak (Quercus spp.) and 10 Ash (Fraxinus excelsior) native woodlands and in five Mid-rotation (20–30 years old) and five Mature (30–50 years old) Sitka spruce plantations. Ordination was used to characterise woodland types according to their constituent bird species. Total bird density (calculated using Distance software) and species richness were assessed for the different woodland types. Oak and Ash woodland bird assemblages were separated from Mid-rotation and Mature plantations by the ordination. There was no difference in total bird density between any of the woodland types. Oak woodlands had significantly higher species richness than either Mid-rotation or Mature Sitka spruce plantations. Ash had higher species richness than Mature Sitka spruce plantations. Understorey vegetation was negatively associated with total bird density, which also varied with survey year. Understorey vegetation was positively associated with species richness. Reasons for the relationships between vegetation and bird assemblages are discussed. Management should seek to increase shrub and understorey vegetation in the Mid-rotation phase to improve the contribution of plantations to bird conservation.
Similar content being viewed by others
References
Alldredge MW, Simons TR, Pollock KH (2007) Factors affecting aural detections of songbirds. Ecol Appl 17:948–955
Barlow J, Gardner TA, Araujo IS et al (2007a) Quantifying the biodiversity value of tropical primary, secondary, and plantation forests. Proc Natl Acad Sci USA 104:18555–18560
Barlow J, Mestre LAM, Gardner TA et al (2007b) The value of primary, secondary and plantation forests for Amazonian birds. Biol Conserv 136:212–231
Bibby CJ, Aston N, Bellamy PE (1989) Effects of broadleaved trees on birds of upland conifer plantations in North Wales. Biol Conserv 49:17–29
Bibby CJ, Burgess ND, Hill DA (2000) Bird census techniques. Academic Press, London
Birks HJB (1980) British trees and insects: a test of the time hypothesis over the last 13, 000 years. Am Nat 115:600
Brockerhoff E, Jactel H, Parrotta J et al (2008) Plantation forests and biodiversity: oxymoron or opportunity? Biodivers Conserv 17:925–951
Buckland ST, Anderson DR, Burnham KP et al (2001) Introduction to Distance Sampling: estimating abundance of biological populations. Oxford University Press, Oxford
Calladine J, Humphreys EM, Strachan F et al (2009) Forestry thinning in commercial conifer plantations has little effect on bird species richness and breeding abundance. Bird Study 56:137–141
Cherkaoui I, Selmi S, Boukhriss J et al (2009) Factors affecting bird richness in a fragmented cork oak forest in Morocco. Acta Oecol 35:197–205
Colwell RK (2006) EstimateS: statistical estimation of species richness and shared species from samples. User’s Guide and application. http://purl.oclc.org/estimates
Coombes RH (2009) Woodpeckers move in. In: Wings 55, Winter 2009
Cross JR (1998) An outline and map of the potential natural vegetation of Ireland. Appl Veg Sci 1:241–252
Ding T-S, Liao H-C, Yuan H-W (2008) Breeding bird community composition in different successional vegetation in the montane coniferous forests zone of Taiwan. Forest Ecol Manag 255:2038–2048
Donald PF, Fuller RJ, Evans AD et al (1998) Effects of forest management and grazing on breeding bird communities in plantations of broadleaved and coniferous trees in western England. Biol Conserv 85:183–197
Dufrene M, Legendre P (1997) Species assemblages and indicator species: the need for a flexible asymmetrical approach. Ecol Monogr 67:345–366
FAO (2007). State of the World’s forests 2007. Food and Agriculture Organisation of the United Nations
Farwig N, Sajita N, Böhning-Gaese K (2008) Conservation value of forest plantations for bird communities in western Kenya. Forest Ecol Manag 255:3885–3892
Fennessy GJ, Kelly TC (2006) Breeding densities of Robin Erithacus rubecula in different habitats: the importance of hedgerow structure. Bird Study 53:97–104
Ferris R, Peace AJ, Humphrey JW et al (2000) Relationships between vegetation, site type and stand structure in coniferous plantations in Britain. Forest Ecol Manag 136:35–51
Forest Service (2007) National Forest Inventory—Republic of Ireland, Forest Service. Johnstown Castle Estate Co, Wexford
Fossitt JA (2000) A guide to the habitats of Ireland. The Heritage Council, Kilkenny
Fuller RJ (1995) Bird life of woodland and forest. Cambridge University Press, Cambridge
Fuller RJ, Browne S (2003) Effects of plantation structure and management on birds. In: Humphrey J, Ferris R, Quine C (eds) Biodiversity in Britain’s planted forests. Results from the Forestry Commission’s biodiversity assessment project. Forestry Commission, Edinburgh, pp 93–99
Fuller RJ, Noble DG, Smith KW et al (2005) Recent declines in populations of woodland birds in Britain: a review of possible causes. Br Birds 98:116–143
Fuller RJ, Smith KW, Grice PV et al (2007) Habitat change and woodland birds in Britain: implications for management and future research. Ibis 149:261–268
Gill RMA, Fuller RJ (2007) The effects of deer browsing on woodland structure and songbirds in lowland Britain. Ibis 149:119–127
Gregory RD, Vorisek P, Van Strien A et al (2007) Population trends of widespread woodland birds in Europe. Ibis 149:78–97
Hewson CM, Amar A, Lindsell JA et al (2007) Recent changes in bird populations in British broadleaved woodland. Ibis 149:14–28
Highland Statistics LTD (2007). Brodgar. Software package for data exploration, univariate analysis, multivariate analysis and time series analysis.Aberdeenshire, Scotland
Hopkins JJ, Kirby KJ (2007) Ecological change in British broadleaved woodland since 1947. Ibis 149:29–40
Kennedy CEJ, Southwood TRE (1984) The number of species of insects associated with British trees: a re-analysis. J Appl Ecol 53:455–478
Kerr G (1999) The use of silvicultural systems to enhance the biological diversity of plantation forests in Britain. Forestry 72:191–205
Lantschner M, Rusch V, Peyrou C (2008) Bird assemblages in pine plantations replacing native ecosystems in NW Patagonia. Biodivers Conserv 17:969–989
Lindenmayer DB, Cunningham RB, Donnelly CF et al (2002) Effects of forest fragmentation on bird assemblages in a novel landscape context. Ecol Monogr 72:1–18
Luck GW, Korodaj TN (2008) Stand and landscape-level factors related to bird assemblages in exotic pine plantations: implications for forest management. Forest Ecol Manag 255:2688–2697
Lynas P, Newton SF, Robinson JA (2007) The status of birds in Ireland: an analysis of conservation concern 2008–2013. Irish Birds 8:149–167
Magura T, Báldi A, Horváth R (2008) Breakdown of the species–area relationship in exotic but not in native forest patches. Acta Oecol 33:272–279
Mänd R, Leivits A, Leivits M et al (2009) Provision of nestboxes raises the breeding density of Great Tits Parus major equally in coniferous and deciduous woodland. Ibis 151:487–492
Marsden SJ, Whiffin M, Galetti M (2001) Bird diversity and abundance in forest fragments and Eucalyptus plantations around an Atlantic forest reserve, Brazil. Biodivers Conserv 10:737–751
McCune B, Mefford MJ (2006) PC-ORD. Multivariate analysis of ecological data. MjM Software Gleneden Beach, Oregon, USA
Met Éireann (2010). http://www.met.ie/climate/monthly-summary.asp
Mitchell F (2006) Where did Ireland’s trees come from? Biol Environ 106:251–259
Newton I (1994) The role of nest sites in limiting the numbers of hole-nesting birds: a review. Biol Conserv 70:265–276
Nikolov SC (2009) Effect of stand age on bird communities in late-successional Macedonian pine forests in Bulgaria. Forest Ecol Manag 257:580–587
Paritsis J, Aizen MA (2008) Effects of exotic conifer plantations on the biodiversity of understory plants, epigeal beetles and birds in Nothofagus dombeyi forests. Forest Ecol Manag 255:1575–1583
Quine CP, Fuller RJ, Smith KW et al (2007) Stand management: a threat or opportunity for birds in British woodland? Ibis 149:161–174
Sax DF (2002) Equal diversity in disparate species assemblages: a comparison of native and exotic woodlands in California. Global Ecol Biogeogr 11:49–57
Smith G, Gittings T, Wilson M et al (2008) Identifying practical indicators of biodiversity for stand-level management of plantation forests. Biodivers Conserv 17:991–1015
Snow DW, Perrins CM (1998) The birds of the Western Palearctic: concise edition. Oxford University Press, Oxford
Straw N, Fielding N, Green G et al (2006) Seasonal changes in the distribution of green spruce aphid Elatobium abietinum (Walker) (Homoptera: Aphididae) in the canopy of Sitka spruce. Agric For Entomol 8:139–154
Thomas L, Laake JL, Strindberg S et al (2006) Distance 5.0. Release 2. Research unit for wildlife population assessment. University of St. Andrews, UK
The Woodland Trust (2007) Back on the map: an inventory of ancient and long-established woodland for Northern Ireland. Preliminary report. The Woodland Trust, Bangor
Wilson MW, Pithon J, Gittings T et al (2006) Effects of growth stage and tree species composition on breeding bird assemblages of plantation forests. Bird Study 53:225–236
Wilson MW, Gittings T, Kelly TC et al (2010) The importance of non-crop vegetation for bird diversity in Sitka spruce plantations in Ireland. Bird Study 57:116–120
Zurita GA, Rey N, Varela DM et al (2006) Conversion of the Atlantic Forest into native and exotic tree plantations: effects on bird communities from the local and regional perspectives. Forest Ecol Manag 235:164–173
Acknowledgements
This project was funded by COFORD under the National Development Plan 2007–2013. Our thanks go to Coillte Teoranta, the Forest Service of Northern Ireland and the National Parks and Wildlife Service for allowing access to forests. Several private landowners also kindly permitted access to forests on their land. Thanks to Linda Coote and Karen Moore for access to unpublished data, and to several post-graduate students, post-docs and an anonymous reviewer whose suggestions greatly improved the manuscript.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sweeney, O.F.M., Wilson, M.W., Irwin, S. et al. Are bird density, species richness and community structure similar between native woodlands and non-native plantations in an area with a generalist bird fauna?. Biodivers Conserv 19, 2329–2342 (2010). https://doi.org/10.1007/s10531-010-9844-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10531-010-9844-7