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Red deer exclusion and saxicolous cryptogam community structure

  • Oliver MOORE (a1) and Michael J. CRAWLEY (a1)


Deer exclosure is an important management strategy for encouraging woodland regeneration in the presence of high numbers of Cervus elaphus L. This could pose a threat to important saxicolous lichen communities as a result of competition from bryophytes and other vegetation. This investigation compared the bryophyte and lichen communities associated with siliceous rock outcrops and boulders inside and outside a number of exclosures in wet heath vegetation at the Gruinard, Letterewe and Little Gruinard estates in Wester Ross. Species cover data were recorded from 6600·2×0·2 m quadrats, allocated to three different aspects of rocks, from 22 pairs of plots (placed either side of a deer fence) with randomization at each level of this hierarchy. The data were analyzed using linear mixed effects models. Mean lichen cover, diversity and species richness were significantly lower in quadrats on rocks within the exclosures. Mean bryophyte cover was significantly higher in quadrats on rocks inside the deer fence and was shown to have a highly significant negative relationship with total lichen cover. Saxicolous lichen species are particularly affected by the increase in shading and litter accumulation from the surrounding plants and the subsequent growth of bryophytes and heath vegetation on rocks within the exclosures. The results of this study have implications for the use of exclosures at locations where there are important saxicolous lichen communities.



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Air Pollution Information System (2013) Nitrogen deposition data. Site accessed 20/07/2013.
Bates, J. W. (1992) Influence of chemical and physical factors on Quercus and Fraxinus epiphytes at Loch Sunart, western Scotland: a multivariate analysis. Journal of Ecology 80: 163179.
Bobbink, R., Braun, S., Nordin, A., Power, S., Schütz, K., Strengbom, J., Weitjers, M. & Tomassen, H. (2011) Review and revision of empirical critical loads and dose-response relationships. Proceedings of an expert workshop, Noordwijkerhout, 23–25 June 2010. RIVPM Report: 680359002. Bilthoven, The Netherlands: Coordination Centre for Effects, RIVM.
British Geological Survey (1962) Inverbroom – Sheet 92. Southampton: Ordnance Survey.
Church, J. M., Coppins, B. J., Gilbert, O. L., James, P. W. & Stewart, N. F. (1996) British Red Data Books: Lichens. Volume 1: Britain. Peterborough: Joint Nature Conservancy Council.
Clutton-Brock, T. H., Coulson, T. & Milner, J. M. (2004) Red deer stocks in the Highlands of Scotland. Nature 429: 261262.
Coppins, B. J. (2003) Lichen conservation in Scotland. Botanical Journal of Scotland 55: 2738.
Crawley, M. J. (2013) The R Book Second Edition. Chichester: John Wiley & Sons Ltd.
Fletcher, A. (2001) Lowland rocks and lichens. In Lichen Habitat Management (Fletcher, A., Wolseley, P. & Woods, R., eds): 10.110.5. London: British Lichen Society.
Fryday, A. M. (1996) The lichen vegetation of some previously overlooked high-level habitats in North Wales. Lichenologist 28: 521541.
Fryday, A. M. (2001) Effects of grazing animals on upland/montane lichen vegetation in Great Britain. Botanical Journal of Scotland 53: 119.
Gilbert, O. (2000) Lichens. London: HarperCollins Publishers.
James, P. W., Hawksworth, D. L. & Rose, F. (1977) Lichen communities in the British Isles: a preliminary conspectus. In Lichen Ecology (Seaward, M. R. D., ed.): 3168. London: Academic Press.
Karlsson, P. E., Ferm, M., Tømmervik, H., Hole, L. R., Pihl Karlsson, G., Ruoho-Airola, T., Aas, W., Hellsten, S., Akselsson, C., Nørgaard Mikkelsen, T. et al. (2013) Biomass burning in eastern Europe during spring 2006 caused high deposition of ammonium in northern Fennoscandia. Environmental Pollution 176: 7179.
Lange, O. L., Green, T. G. A. & Heber, U. (2001) Hydration-dependent photosynthetic production of lichens: what do laboratory studies tell us about field performance? Journal of Experimental Botany 52: 20332042.
Meteorological Office (2013) UK mapped climate averages. Site accessed 20/07/2013.
Milner, R., Alexander, J. & Griffin, C. (2002) A Highland Deer Herd and its Habitat. London: Red Lion House.
Mitchell, B., Truscot, A. M., Leith, I. D., Cape, J. N., Van Duk, N., Tang, Y. S., Fowler, D. & Sutton, M. A. (2005) A study of the epiphytic communities of Atlantic oak woods along an atmospheric nitrogen deposition gradient. Journal of Ecology 93: 482492.
Moore, O. & Crawley, M. J. (2014) The impact of red deer management on cryptogam ecology in vegetation typical of northwest Scotland. Plant Ecology and Diversity. (in press) Doi: 10.1080/17550874.2013.848242
Orange, A. (2009) Saxicolous lichen and bryophyte communities in Upland Britain. Joint Nature Conservation Committee Report No. 404. Peterborough: JNCC.
Pellerin, S., Huot, J. & Côté, S. D. (2006) Long-term effects of deer browsing and trampling on the vegetation of peatlands. Biological Conservation 128: 316326.
Porley, R. & Hodgetts, N. (2005) Mosses and Liverworts. London: HarperCollins Publishers.
R Development Core Team (2010) R: A Language and Environment for Statistical Computing. Vienna: R Foundation for Statistical Computing.
Ratcliffe, P. R. & Staines, B. W. (2003) Deer management requirements for the delivery of Natura 2000 objectives in Atlantic Oakwoods. In Restoring Natural Forest Habitats (Caledonian Partnership, ed.): 3339. Munlochy: Highland Birchwoods.
Rodwell, J. S. (1991) British Plant Communities Volume 2: Mires and Heaths. Cambridge: Cambridge University Press.
Rydin, H. (2009) Population and community ecology of bryophytes. In Bryophyte Biology, 2nd Edition (Goffinet, B. & Shaw, J. A., eds): 393444. Cambridge: Cambridge University Press.
Thompson, D. B. A., Galbraith, H. & Horsfield, D. (1987) Ecology and resources of Britain's mountain plateaux: land use conflicts and impacts. In Agriculture and Conservation in the Hills and Uplands (Bell, M. & Bunce, R. G. H., eds): 2231. Grange-over-Sands: Institute of Terrestrial Ecology.
Virtanen, R., Edwards, G. R. & Crawley, M. J. (2002) Red deer management and vegetation on the Isle of Rum. Journal of Applied Ecology 39: 572583.
Warren, C. (2009) Managing Scotland's Environment. Edinburgh: Edinburgh University Press.
Weibull, H. & Rydin, H. (2005) Bryophyte species richness on boulders: relationship to area, habitat diversity and canopy tree species. Biological Conservation 122: 7179.


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Red deer exclusion and saxicolous cryptogam community structure

  • Oliver MOORE (a1) and Michael J. CRAWLEY (a1)


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