Dickinson, A, Humphries, RN, Pawlett, M & Tibbett, M 2016, 'Ecological and soil development of 19th Century iron and coal mine wastes at Bryn Defaid, South Wales', in AB Fourie & M Tibbett (eds), Proceedings of the 11th International Conference on Mine Closure
, Australian Centre for Geomechanics, Perth, pp. 187-196, https://doi.org/10.36487/ACG_rep/1608_12_Dickinson
Prior to modern regulatory control, mine wastes were typically abandoned and left with minimal disturbance or improvement at the former mine site. Bryn Defaid is one such example and is located on the western slopes of Aberdare Mountain, Rhondda Cynon Taff, Wales, where spoil materials from iron and coal mining were deposited from the mid-1800s. In this study, we investigated the relationship between varied extents of floristic development (including mosses, heather, acidophil grasses and diverse communities of lichens), and the development of incipient soils after 150 years of pedogenesis. We hypothesised that observable categorical changes in the floristic development would be reflected in differential soil development and in its associated microbiota. Ecological development was classified into six floristically defined categories: Bare ground, Primary colonisation, Lichen dominant, Moss-lichen mix, Moss-vascular plant mix and Moss heather mix.
Soil chemistry showed no significant effect of floristic development on pH (ca.4.5–5.0) and basic cations but a significant effect on soil organic matter and total nitrogen and phosphorus. These higher concentrations were typically found in the moss dominated sites. Soil microbial biomass was also high under mosses, particularly the moss-heather community. Abiotic and biotic conditions under lichen communities were not significantly different to those under later floristic communities, suggesting that other factors (potentially spoil stability) are affecting the development of lichen communities. Overall, there was a relationship between some key soil properties and the extent and stage of floristic development. We conclude that plant-soil feedbacks may play an important role in controlling the development of post-mining plant ecology and related pedogenesis.
Anderson, JPE & Domsch, KH 1978, ‘A physiological method for the quantitative measurement of microbial biomass in soils’, Soil Biology and Biochemistry, vol. 10, pp. 215–221.
Armstrong, RA 1990, ‘Dispersal, establishment and survival of soredia and fragments of the lichen, Hypogymnia physodes (L.) Nyl’, New Phytologist, vol. 114, no. 2, pp. 239–245.
Baldrian, P, Trögl, J, Frouz, J, Šnajdr, J, Valášková, V, Merhautová, V, Cajthaml, T & Herinková, J 2008, ‘Enzyme activities and microbial biomass in topsoil layer during spontaneous succession in spoil heaps after brown coal mining’, Soil Biology and Biochemistry, vol. 40, no. 9, pp. 2107–2115.
Bending, NAD & Moffat, AJ 1999, ‘Tree performance on minespoils in the South Wales coalfield’, Journal of Applied Ecology, vol. 36, no. 5, pp. 784–797.
Bradshaw, AD 1984, ‘Ecological principles and land reclamation practice’, Landscape Planning, vol. 11, pp. 35–48.
Bradshaw, AD 1997, ‘Restoration of mined lands—using natural processes’, Ecological Engineering, vol. 8, no. 4, pp. 255–269.
Bradshaw, AD & Chadwick, MJ 1980, The Restoration of Land. The Ecology and Reclamation of Derelict and Degraded Land, Blackwell Scientific Publications, Oxford.
Davies, BNK (ed.) 1981, Ecology of Quarries, Institute of Terrestrial Ecology, Huntingdon.
Demoling, F, Figueroa, D & Bååth, E 2007, ‘Comparison of factors limiting bacterial growth in different soils’, Soil Biology and Biochemistry, vol. 39, no. 10, pp. 2485–2495.
Eisenhauer, N & Reich, RB 2011, ‘Above- and below-ground plant inputs both fuel soil food webs’, Soil Biology and Biochemistry, vol. 45, pp. 156–150.
Gemmell, RP 1977, Studies in Biology 80: Colonisation of Industrial Land, Edward Arnold, London.
George, SJ, Kelly, RN, Greenwood, PF & Tibbett, M 2010, ‘Soil carbon and litter development along a reconstructed biodiverse forest chronosequence of South-Western Australia’, Biogeochemistry, vol. 101, pp. 197–209.
Hinsinger, P, Bengough, A, Vetterlein, D & Young, I 2009, ‘Rhizosphere: biophysics, biogeochemistry and ecological relevance,’ Plant Soil, vol. 321, pp. 117–152.
Humphries, RN 2013, ‘The contribution of active surface mines in the conservation of lower plant communities in the South Wales coalfield, United Kingdom’, Journal of the American Society of Mining and Reclamation, vol. 2, issue 1, pp. 80–98.
Humphries, RN & Elkington, TT (eds) 1980, ‘Reclaiming Limestone and Flourspar Workings for Wildlife’, Reclamation Review, vol. 3 (4), pp. 189–240.
Humphries, RN & Leverton, E 2012, An investigation of the nature of tipped surface mine material on the western slopes of Aberdare Mountain above LLwydcoed, Rhondda Cynon Taff, Celtic Energy, Caerphilly.
Humphries, RN & Rowell, TA 1994, The Establishment and Maintenance of Vegetation on Colliery Spoils, British Coal Corporation, Eastwood.
Insam, H & Haselwandter, K 1989, ‘Metabolic quotient of the soil microflora in relation to plant succession’, Oecologia, vol. 79, no. 2, pp. 174–178.
JNCC (Joint Nature Conservation Committee) 2012, UK Biodiversity Action Plan, JNCC, viewed 5 July 2013,
Johnson, MS 1978, ‘Land reclamation and botanical significance of some former mining and manufacturing sites in Britain’, Environmental Conservation, vol. 5, pp. 223–228.
Jones, DL & Jones, G 2008, ‘A Strategic Conservation Assessment of Heathland and Associated Habitats on Spoils of South Wales: Phase 2 Assessment of Environmental Parameters’, CCW Science Report 824, Countryside Council for Wales, Bangor.
Lin, Q & Brookes, PC 1999, ‘An evaluation of the substrate-induced respiration method’ Soil Biology and Biochemistry, vol. 31, pp. 1969–1983.
Maddock, A 2008, ‘UK Biodiversity Action Plan; Priority Habitat Descriptions’, UK Biodiversity Action Plan, p. 94.
MAFF (Ministry of Agriculture, Fisheries and Food (UK)) 1986, The analysis of agricultural materials - Reference book 427, 3rd edition, Her Majesty’s Stationery Office, London.
Mengel, K & Kirkby, EA 1978, Principles of Plant Nutrition, International Potash Institute, Berne.
Olsen, SR, Cole, C, Watanabe, FS & Dean, L 1954, Estimation of available phosphorus in soils by extraction with sodium bicarbonate, US Department of Agriculture Washington, DC.
Orozco-Aceves, M, Standish, RJ & Tibbett, M 2015, ‘Soil conditioning and plant-soil feedbacks in a modified forest ecosystem are soil-context dependent’, Plant and Soil, vol. 390, pp. 183–194.
Prach, K & Hobbs, RJ 2008, ‘Spontaneous succession versus technical reclamation in the restoration of disturbed sites’, Restoration Ecology, vol. 16, no. 3, pp. 363–366.
Roturier, S, Bäcklund, S, Sundén, M & Bergsten, U 2007, ‘Influence of ground substrate on establishment of reindeer lichen after artificial dispersal’, Silva Fennica, vol. 41, no. 2, pp. 269–280.
Sillett, SC, McCune, B, Peck, JE, Rambo, TR & Ruchty, A 2000, ‘Dispersal limitations of epiphytic lichens result in species dependent on old-growth forests’, Ecological Applications, vol. 10, no. 3, pp. 789–799.
Smith, PL 2012, Bryn Defaid, Mynydd Aberdar, Rhondda Cynon Taff, Celtic Energy, Caerphilly, BIREPO83-01.
Spain, AV & Tibbett, M 2011, ‘Substrate conditions, root and arbuscular mycorrhizal colonisation of landforms rehabilitated after coal mining, sub-tropical Queensland,’ in AB Fourie, M Tibbett & A Beersing (eds), Mine Closure 2011, Volume 1: Mine Site Reclamation, Australian Centre for Geomechanics, Perth, pp. 199–208.
Spain, AV & Tibbett, M 2012, ‘Coal mine tailings: development after revegetation with salt-tolerant tree species’, in AB Fourie & M Tibbett (eds), Mine Closure 2012, Proceedings of the Seventh International Conference on Mine Closure, Australian Centre for Geomechanics, Perth, pp. 583–594.
Spain, AV, Tibbett, M, Hinz, DA, Ludwig JA & Tongway, DJ 2015, ‘The mining-restoration system and ecosystem development following bauxite mining in a biodiverse environment of the seasonally dry tropics, Northern Territory, Australia’, in M Tibbett (ed), Mining in Ecologically Sensitive Landscapes, CRC Press, Netherlands, pp. 159–227.
StatSoft, Inc, 2010, Statistica (data analysis software system), version 11, Dell Software.
Tibbett, M 2008, ‘Carbon Accumulation in Soils during Reforestation: the Australian Experience after Bauxite Mining’, in AB Fourie, M Tibbett, I Weiersbye & P Dye (eds), Proceedings of the Third International Seminar on Mine Closure, Australian Centre for Geomechanics, Perth, pp. 3–12.
Tibbett, M, Carter, DO, Haslam, T, Major, R & Haslam, H 2004, ‘A laboratory incubation method for determining the rate of microbiological degradation of skeletal muscle tissue in soil’, Journal of Forensic Sciences, vol. 49, pp. 560–565.
Wales Biodiversity Partnership 2012, Section 42 Lists, viewed 7 May 2012,
Walkley, A & Black, IA 1934, ‘An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method’, Soil Science, vol. 37, no. 1, pp. 29–38.
Whitlock, DS, Rickson, J, Humphries, N, Thompson, R & Tibbett, M 2015, ‘The influence of coal mine spoil physical properties on the spatial distribution of lichen-rich communities’, in AB Fourie, M Tibbett, L Sawatsky & D van Zyl (eds), Mine Closure 2015, Proceedings of the Tenth International Conference on Mine Closure, InfoMine, Vancouver.