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The effects of hybridization on the small-scale variation in seed-bank composition of a rare plant species, Erica ciliaris L.

Published online by Cambridge University Press:  01 September 2007

R.J. Rose
R.J. Rose*
Affiliation:
NERC Centre for Ecology and Hydrology, Winfrith Technology Centre, Dorchester, Dorset, DT2 8ZDUK
*
*Correspondence Fax: +44 1305 213600 Email: [email protected]
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Abstract

The size and composition of the seed bank of a rare species (Erica ciliaris L.) was analysed. E. ciliaris hybridizes with a common relative in southern England (Erica tetralix). The seed banks of these co-occurring species were measured at a number of sites with a range of vegetation types and different management histories. Additional sets of samples were taken from forestry plantations on former heathland sites, where these species were known to occur. Relatively few hybrid seedlings were found in any of the seed-bank samples, even though their vegetative abundance within the sampling areas was equal to that of the pure plants. However, the abundance in the vegetation of the two pure species was reflected in the seed-bank size on each of the vegetation types, both with and without burning management. The seed banks from the forestry plantations show that the numbers of seeds of both E. tetralix and the hybrid were depleted, but that the seed bank of E. ciliaris was not significantly different from that of open heathland seed banks. The long-lived nature of the seed bank indicates that there are opportunities for habitat restoration on former heathland sites.

Keywords

conservationdisturbanceErica ciliarisErica tetralixextinctionforestryheathlandplant hybridizationrestorationseed bank
Type
Research Article
Information
Seed Science Research , Volume 17 , Issue 3 , September 2007 , pp. 201 - 210
Copyright
Copyright © Cambridge University Press 2007

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References

Allison, M.andAusden, M. (2006) Effects of removing the litter and humic layers on heathland establishment following plantation removal. Biological Conservation 127, 177–182.CrossRefGoogle Scholar
Arnold, M.L. (1994) Natural hybridization and Louisiana irises. Defining a major factor in plant evolution. BioScience 44, 141–147.CrossRefGoogle Scholar
Arnold, M.L. (1997) Natural hybridization and evolution. Oxford, Oxford University Press.CrossRefGoogle Scholar
Bannister, P. (1965) Biological flora of the British Isles. Erica cinerea L. Journal of Ecology 53, 527–542.CrossRefGoogle Scholar
Bannister, P. (1966) Biological flora of the British Isles. Erica tetralix L. Journal of Ecology 54, 795–813.CrossRefGoogle Scholar
Bekker, R.M., Oomes, M.J.M.andBakker, J.P. (1998) The impact of groundwater level on soil seed bank survival. Seed Science Research 8, 399–404.CrossRefGoogle Scholar
Bossuyt, B.andHermy, M. (2003) The potential of soil seedbanks in the ecological restoration of grassland and heathland communities. Belgian Journal of Botany 136, 23–34.Google Scholar
Bouck, A., Peeler, R., Arnold, M.L.andWessler, S.R. (2005) Genetic mapping of species boundaries in Louisiana irises using IRRE retrotransposon display markers. Genetics 171, 1289–1303.CrossRefGoogle ScholarPubMed
Britton, A.J., Marrs, R.H., Carey, P.D.andPakeman, R.J. (2000) Comparison of techniques to increase Calluna vulgaris cover on heathland invaded by grasses in Breckland, south east England. Biological Conservation 95, 227–232.CrossRefGoogle Scholar
Bullock, J.M.andClarke, R.T. (2000) Long distance seed dispersal by wind: measuring and modelling the tail of the curve. Oecologia 124, 506–521.CrossRefGoogle ScholarPubMed
Chapman, S.B. (1975) The distribution and composition of hybrid populations of Erica ciliaris L. and Erica tetralix L. in Dorset. Journal of Ecology 63, 809–823.CrossRefGoogle Scholar
Chapman, S.B.andRose, R.J. (1994) Changes in the distribution of Erica ciliaris L. and E. × watsonii Benth. in Dorset, 1963–1987. Watsonia 20, 89–95.Google Scholar
Chapman, S.B., Clarke, R.T.andWebb, N.R. (1989) The survey and assessment of heathland in Dorset, England, for conservation. Biological Conservation 47, 137–152.CrossRefGoogle Scholar
Eshel, A., Henig-Sever, N.andNe'eman, G. (2000) Spatial variation of seedling distribution in an east Mediterranean pine woodland at the beginning of post fire succession. Plant Ecology 148, 175–182.CrossRefGoogle Scholar
Fischer, M.andMatthies, D. (1998) Experimental demography of the rare Gentianella germanica: seed bank formation and microsite effects on seedling establishment. Ecography 21, 269–278.CrossRefGoogle Scholar
Gay, P.A. (1957) Aspects of the phytogeography of some Lusitanian Ericaceae in the British Isles. PhD thesis, University of London.Google Scholar
Gay, P.A. (1960) A new method for the comparison of populations that contain hybrids. New Phytologist 59, 218–226.CrossRefGoogle Scholar
Gillham, D.A. (1980) The conservation and restoration of heathland vegetation disturbed by industrial operations. PhD thesis, University of Liverpool.Google Scholar
Gimingham, C.H. (1972) Ecology of heathlands. London, Chapman & Hall.Google Scholar
Grant, V. (1949) Pollination systems as isolating mechanisms in angiosperms. Evolution 3, 82–97.CrossRefGoogle ScholarPubMed
Grant, V. (1975) Genetics of flowering plants. New York, Columbia University Press.Google Scholar
Johnston, J.A., Arnold, M.L.andDonovan, L.A. (2003) High hybrid fitness at seed and seedling life history stages in Louisiana irises. Journal of Ecology 91, 438–446.CrossRefGoogle Scholar
Levin, D.A., Francisco-Ortega, J.andJansen, R.K. (1996) Hybridization and the extinction of rare plant species. Conservation Biology 10, 10–16.CrossRefGoogle Scholar
Mitchell, R.J., Marrs, R.H.andAuld, M.H.D. (1998) A comparative study of the seedbanks of heathland and successional habitats in Dorset, Southern England. Journal of Ecology 86, 588–596.CrossRefGoogle Scholar
Neyraut, M. (1900) Nouvelle localité française de l'Erica watsoni et de quelques formes ou variétés de l'Erica tetralix et de l'Erica ciliaris. Bulletin de la Société Botanique de France 17, 326–329.CrossRefGoogle Scholar
Odion, D.andTyler, C. (2002) Are long fire-free periods needed to maintain the endangered, fire-recruiting shrub Arctostaphylos morroensis (Ericaceae)? Conservation Ecology 6 (2), 4. Available online athttp://www.consecol.org/vol6/iss2/art4/.CrossRefGoogle Scholar
Pakeman, R.J.andMarshall, A.G. (1997) The seedbanks of the Breckland heaths and heath grasslands, eastern England, and their relationship to the vegetation and the effects of management. Journal of Biogeography 24, 375–390.CrossRefGoogle Scholar
Perring, F.H.andSell, P.D. (1968) Critical supplement to the atlas of the British flora. London, Thomas Nelson & Sons.Google Scholar
Putwain, P.D.andRae, P. (1988) Heathland restoration: A handbook of techniques. Southampton, Environmental Advisory Unit, Liverpool University and British Gas plc.Google Scholar
Pywell, R.F. (1993) The restoration of farmland in southern Britain. PhD thesis, University of Liverpool.Google Scholar
Pywell, R.F., Putwain, P.D.andWebb, N.R. (1997) The decline of heathland seed populations following the conversion to agriculture. Journal of Applied Ecology 34, 949–960.CrossRefGoogle Scholar
Pywell, R.F., Pakeman, R.J., Allchin, E.A., Bourn, N.A.D., Warman, E.A.andWalker, K.J. (2002) The potential for lowland heath regeneration following plantation removal. Biological Conservation 108, 247–258.CrossRefGoogle Scholar
Rodwell, J.S. (1991) British plant communities. Volume 2. Mires and heaths. Cambridge, Cambridge University Press.CrossRefGoogle Scholar
Rose, R.J., Bannister, P.andChapman, S.B. (1996) Biological flora of the British Isles: Erica ciliaris L. Journal of Ecology 84, 617–628.CrossRefGoogle Scholar
Rose, R.J., Webb, N.R., Clarke, R.T.andTraynor, C.H. (2000) Changes on the heathlands in Dorset, England between 1987 and 1996. Biological Conservation 93, 117–125.CrossRefGoogle Scholar
Stace, C.A. (1975) Hybridization and the flora of the British Isles. London, Academic Press.Google Scholar
ter Heerdt, G.N.J., Schutter, A.andBakker, J.P. (1999) The effect of water supply on seed-bank analysis using the seed-emergence method. Functional Ecology 13, 428–430.CrossRefGoogle Scholar
Thompson, K.andGrime, J.P. (1979) Seasonal variation in the seed banks of herbaceous species in ten contrasting habitats. Journal of Ecology 67, 893–921.CrossRefGoogle Scholar
Thompson, K., Bakker, J.P.andBekker, R.M. (1997) The soil seedbanks of North West Europe: Methodology, density and longevity. Cambridge, Cambridge University Press.Google Scholar
Valbuena, L.andTrabaud, L. (2001) Contribution of the soil seed bank to post-fire recovery of a heathland. Plant Ecology 152, 175–183.CrossRefGoogle Scholar
Walker, K.J., Stevens, P.A., Stevens, D.P., Mountford, J.O., Manchester, S.J.andPywell, R.F. (2004a) The restoration and re-creation of species-rich lowland grassland on land formerly managed for intensive agriculture in the UK. Biological Conservation 119, 1–18.CrossRefGoogle Scholar
Walker, K.J., Pywell, R.F., Warman, E.A., Fowbert, J.A., Bhogal, A.andChambers, B.J. (2004b) The importance of former land use in determining successful re-creation of lowland heath in southern England. Biological Conservation 116, 289–303.CrossRefGoogle Scholar
Wigginton, M.J. (1999b) British red data books: Vascular plants. (3rd edition). Peterborough, UK, Joint Nature Conservation Committee.Google Scholar
Wolf, D.E., Takebayashi, N.andRieseberg, L.H. (2001) Predicting the risk of extinction through hybridization. Conservation Biology 15, 1039–1053.CrossRefGoogle Scholar