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Environmental Geology

, Volume 51, Issue 8, pp 1389–1400 | Cite as

Geological controls on natural ecosystem recovery on mine waste in southern New Zealand

  • D. CrawEmail author
  • C. G. Rufaut
  • S. Hammit
  • S. G. Clearwater
  • C. M. Smith
Original Article

Abstract

Slopes of an abandoned waste rock at Wangaloa coal mine, south-east New Zealand, have naturally developed variable vegetation cover over the last 40–60 years. Three distinct areas of revegetation can clearly be identified: dense cover, patchy cover, and largely unvegetated, and the differences in revegetation success are directly related to the physical properties of different rock types making up the waste rock substrate. The colonizing plants have become established in largely unweathered rock with essentially no soil development. Quartz gravel and siltstone waste rock are the two principal rock types forming substrates for revegetation. The quartz gravel has clasts up to 3 cm, and was derived from the coal-bearing sequence. Siltstone was largely derived from a Quaternary loess cap on the coal mine area. These two substrates have similar mineral contents, and this mineral material provides the low level of available nutrients. However, there is little difference in nutrient status or trace element load of the different substrates, and differences in cohesion, moisture content, and proportion of quartz pebbles control revegetation success. Finer grained matrix has been flushed from quartz gravel waste rock by rain water, leaving a dry surface armour layer of quartz pebbles. This surface layer inhibits plant establishment, so quartz gravel waste rock remains largely unvegetated. Erosion creates deep rills, and steep surfaces creep downslope. In contrast, full vegetation cover was established on the siltstone waste rock that was cohesive and did not erode. Patchy revegetation was localized by siltstone in mixed quartz gravel and siltstone substrate. Invertebrate diversity and distribution were closely linked to the spatial patterns of revegetation. The rate of revegetation and ecosystem recovery was primarily dependent on the proportion of siltstone waste rock in the last dumped truck load. A quartz pebble content <15% is optimal for plant establishment.

Keywords

Natural revegetation Waste rock Coal Mine Plants Invertebrates 

Notes

Acknowledgments

The support and supply of rehabilitation information from Solid Energy N.Z. Ltd and MWH, in particular Tim Preston and Craig Evans, is gratefully acknowledged. Many thanks also to Simon Clearwater, Julie Clark, Andrea Todd, Hamish Barrons, Jenny Rufaut, Michelle Baker, and Denise Fastier for assistance in the field and lab.

References

  1. Allen RB (1988) A forest succession in the Catlins Ecological Region, south-east Otago, New Zealand. N Z J Ecol 11:21–29Google Scholar
  2. Baker MA (2005) The geochemical environment during rehabilitation of the Wangaloa opencast coal mine, South East Otago, New Zealand. Unpublished MSc thesis. Department of Geology, University of Otago, DunedinGoogle Scholar
  3. Bell LC (2001) Establishment of native ecosystems after mining—Australian experience across diverse biogeographic zones. Ecol Eng 17:179–186CrossRefGoogle Scholar
  4. Black A, Craw D (2001) Arsenic, copper and zinc at Wangaloa coal mine, southeast Otago, New Zealand. Int J Coal Geol 45:181–193CrossRefGoogle Scholar
  5. Blakemore LC, Searle PL, Daly BK (1987) Methods for chemical analysis of soils. N Z Soil Bureau Sci Rep 80. DSIR, Wellington, NZGoogle Scholar
  6. Bradshaw AD (1983) The reconstruction of ecosystems. J Appl Ecol 20:1–17CrossRefGoogle Scholar
  7. Bradshaw A (1997) Restoration of mined lands—using natural processes. Ecol Eng 8:255–269CrossRefGoogle Scholar
  8. Bramble WC, Ashley RH (1955) Natural revegetation of spoil banks in Central Pennsylvania. Ecology 36:417–423CrossRefGoogle Scholar
  9. Carroll C, Merton L, Burger P (2000) Impact of vegetative cover and slope on runoff, erosion, and water quality for field plots on a range of soil and spoil materials on central Queensland coal mines. Aust J Soil Res 38:313–327CrossRefGoogle Scholar
  10. Craw D (2002) Geochemistry of late metamorphic hydrothermal alteration and graphitisation of host rock, Macraes gold mine, Otago Schist, New Zealand. Chem Geol 191:257–275CrossRefGoogle Scholar
  11. Craw D, Rufaut CG, Haffert L, Todd A (2006) Mobilisation and attenuation of boron during coal mine rehabilitation, Wangaloa, New Zealand. Sci Total Environ (in press)Google Scholar
  12. Davis MR, Langer ER, Ross CW (1997) Rehabilitation of native forest species after mining. NZ J For Sci 27:51–68Google Scholar
  13. de Joux A, Moore TA (2005) Geological controls on source of Ni in West Coast streams. In: Moore TA, Black A, Centeno JA, Harding JS, Trumm DA (eds) Metal contaminants in New Zealand. Resolutionz Press, Christchurch, pp 261–278Google Scholar
  14. Game M, Carroll JE Hotrabhavandra T (1982) Patch dynamics pf plant succession on abandoned surface coal mines: a case history approach. J Ecol 70:707–720CrossRefGoogle Scholar
  15. Harrington HJ (1958) Geology of the Kaitangata Coalfield. New Zealand Geol Survey Bull 59, DSIR, Wellington, NZGoogle Scholar
  16. Holl KD (2002) Long-term vegetation recovery on reclaimed coal surface mines in the eastern USA. J Appl Ecol 39:960–970CrossRefGoogle Scholar
  17. Holmes PM (2001) Shrubland restoration following woody invasion and mining: effects of topsoil depth, seed source, and fertilizer addition. Restor Ecol 9:71–84CrossRefGoogle Scholar
  18. Johnson FL, Gibson DJ, Risser PG (1982) Revegetation of unreclaimed coal strip-mines in Oklahoma. J Appl Ecol 19:453–463CrossRefGoogle Scholar
  19. Loch RJ, Orange DN (1997) Changes in some properties of topsoil at tarong Coal-Meandu Mine coalmine with time since rehabilitation. Aust J Soil Res 35:77–784CrossRefGoogle Scholar
  20. McLaren RG, Cameron RC (1990) Soil science: an introduction to the properties and management of New Zealand soils. Oxford University Press, AucklandGoogle Scholar
  21. Munshower FF (1994) Disturbed land revegetation. Lewis Publishers, CRC Press Inc, FloridaGoogle Scholar
  22. Naidu R (1992) Distribution, properties and management of sodic soils: an introduction. Aust J Soil Res 31:681–182CrossRefGoogle Scholar
  23. Neel C, Bril H, Courtin-Nomade A, Dutreuil J-P (2003) Factors affecting natural development of soil on 35-year-old sulphide-rich mine tailings. Geoderma 111:1–20CrossRefGoogle Scholar
  24. Prach K, Pyšek P (2001) Using spontaneous succession for restoration of human-disturbed habitats: experience from Central Europe. Ecol Eng 17:55–62CrossRefGoogle Scholar
  25. Reay SD, Norton DA (1999) Assessing the success of restoration plantings in a temperate New Zealand forest. Restor Ecol 7:298–308CrossRefGoogle Scholar
  26. Roberts RD, Marrs RH, Skeefington RA, Bradshaw AD (1981) Ecosystem development on naturally colonized china clay wastes. J Ecol 69:153–161CrossRefGoogle Scholar
  27. Ross CW, Mew G, Jackson RJ, Payne JJ (1995) Land rehabilitation to indigenous forest species. Science for Conservation: 17. Dept Conservation, Wellington, NZGoogle Scholar
  28. Rufaut CG, Hammit S, Craw D, Clearwater SG (2006) Plant and invertebrate colonization of old mine spoil at Wangaloa coal mine, south-east Otago, New Zealand. N Z J Ecol (in press)Google Scholar
  29. Russell WB, La Roi GH (1986) Natural vegetation and ecology of abandoned coal-mined land, Rocky Mountain Foothills, Alberta, Canada. Can J Bot 64:1286–1298Google Scholar
  30. Suggate RP (1959) New Zealand coals: their geological setting and its influence on their properties. DSIR Bull 134. Wellington, NZGoogle Scholar
  31. Titlynova AA, Mironycheva-Tokareva NP (1990) Vegetation succession and biological turnover on coal-mining spoils. J Veg Sci 1:643–652CrossRefGoogle Scholar
  32. Todd AJ (2005) Hydrogeology and revegetation of the Wangaloa opencast coal mine, South-east Otago, New Zealand. Unpublished MSc thesis. Department of Geology, University of Otago, DunedinGoogle Scholar
  33. Todd MCL, Grierson PF, Adams MA (2000) Litter cover as an index of nitrogen availability in rehabilitated mine sites. Aust J Soil Res 38:423–433CrossRefGoogle Scholar
  34. Vetterlein D, Waschkies C, Weber E (1994) Nutrient availability in the initial stages of surface mine spoil reclamation—impact on plant growth. J Plant Nutr Soil Sci 162:315–321CrossRefGoogle Scholar
  35. Watts CH, Gibbs GW (2002) Revegetation and its effects on the ground-dwelling beetle fauna of Matiu-Somes Island, New Zealand. Restor Ecol 10:96–106CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • D. Craw
    • 1
    Email author
  • C. G. Rufaut
    • 1
  • S. Hammit
    • 2
  • S. G. Clearwater
    • 1
  • C. M. Smith
    • 1
    • 3
  1. 1.Geology DepartmentUniversity of OtagoDunedinNew Zealand
  2. 2.Department of GeosciencesPrinceton UniversityPrincetonUSA
  3. 3.Soil and Physical Sciences Group, Agriculture and Life Sciences DivisionLincoln UniversityCanterburyNew Zealand

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