Abstract
Sudbury, Ontario, Canada experienced severe environmental degradation from intensive logging, mining, and smelting activities. Acidification and erosion of soils, as well as heavy metal deposition led to widespread vegetation mortality and the creation of 20 000 ha of barren and 80 000 ha of semi-barren land within the Sudbury region. Restoration processes, consisting of limestone application, fertilization, seeding, and tree planting, was initiated in 1978 and continues to present day. Although initial assessments made immediately following restoration predicted a stable, self-sustaining vegetation community would develop, no formal monitoring protocol was initiated. In this study, we describe the state of four restored sites (3 barren, 1 semi-barren), and their naturally recovering (untreated) analogues, within the Sudbury technogenic barrens 25 to 30 years post-restoration. At each site, two belt transects were established in the restored and untreated areas within which soil pH, tree height and diameter, and ground cover of vegetation identified to species were assessed. Soil pits were excavated to examine pedological development. Soils were Dystric Brunisols in all sites. In restored areas, soil pH and humus layer thickness were generally greater than in areas left to recover naturally. Elevated pH through the soil profile at treated sites indicate limestone application effectively reduced acidity and was sustained up to 30 years post-application. In untreated areas, moss and lichen were abundant, and although vascular plant cover was greater in restored areas, vegetation communities are still significantly different from the reference site. Adequate cover of native understory species was not obtained in any of the treated areas. Results indicate that aerial application of limestone, fertilizer, and seed is less effective than ground application, especially in areas with a high proportion of exposed bedrock. Active restoration has been beneficial to the recovery of the Sudbury technogenic barrens. Continued monitoring will be essential to facilitate the development of a self-sustaining vegetation community.
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REFERENCES
B. D. Amiro and G. M. Courtin, “Patterns of vegetation in the vicinity of an industrially disturbed ecosystem, Sudbury, Ontario,” Can. J. Bot. 59, 1623–1639 (1981).
R. Athar and M. Ahmad, “Heavy metal toxicity: effect on plant growth and metal uptake by wheat, and on free living Azotobacter,” Water, Air Soil Pollut. 138, 165–180 (2002).
B. Bossuyt and M. Hermy, “Restoration of the understory layer of recent forest bordering ancient forest,” Appl. Veg. Sci. 3, 43–50 (2000).
Soil Classification Working Group, The Canadian System of Soil Classification, Agric. Agri-Food Can. Publ. No. 1646 (Ottawa, 1988).
Soil Sampling and Methods of Analysis, Ed. by M. R. Carter and E.G. Gregorich (CRC Press, Boca Raton, FL, 2008).
M. de la Peña-Domene, C. Martínez-Garza, S. Palmas-Pérez, E. Rivas-Alonso, and H. F. Howe, “Roles of birds and bats in early tropical-forest restoration,” PLoS One 9, e104656 (2014).
K. A. Denholm and L. W. Schut, Field Manual for Describing Soils in Ontario (Ontario Center for Soil Resource Evaluation, Guelph, ON, 1993).
B. R. Dreisinger and P. E. McGovern, Sulphur Dioxide Levels and Vegetation Injury in the Sudbury Area during the 1970 Season (Department of Energy and Resources Management, Air Management Branch, Sudbury, ON, 1971).
Canadian climate normals 1981–2010 station data, Sudbury, ON, Environment Canada. https://tinyurl. com/y2h77h5p. Accessed July 31, 2020.
B. Freedman and T. C. Hutchinson, “Long-term effects of smelter pollution at Sudbury, Ontario, on forest composition,” Can. J. Bot. 58, 2123–2140 (1980).
B. Freedman and T. C. Hutchinson, “Pollutant inputs from the atmosphere and accumulation in soils and vegetation near a copper-nickel smelter at Sudbury, Ontario,” Can. J. Bot. 58, 1722–1736 (1980).
Living Landscape: A Biodiversity Action Plan for Greater Sudbury (City of Greater Sudbury, Sudbury, ON, 2018).
J. M. Gunn, P. J. Beckett, W. E. Lautenbach, and S. Monet, “Sudbury, Canada: from pollution record holder to award winning restoration site,” in Handbook of Regenerative Landscape Design, Ed. by R. L. France (CRC Press, Boca Raton, FL, 2008), pp. 381–405.
J. Gunn, W. Keller, J. Negusanti, R. Potvin, P. Beckett, and K. Winterhalder, “Ecosystem recovery after emission reductions: Sudbury, Canada,” Water, Air Soil Pollut. 85, 1783–1788 (1995).
S. A. Hart and H. Y. H. Chen, “Understory vegetation dynamics of North American boreal forests,” Crit. Rev. Plant Sci. 25, 381–397 (2006).
P. W. Hazlett, J. K. Rutherford, and G. W. van Loon, “Metal contaminants in surface soils and vegetation as a result of nickel/copper; smelting at Coniston, Ontario, Canada,” Reclam., Reveg., Restor. 2, 123–137 (1983).
T. C. Hutchinson and L. M. Whitby, “Heavy metal pollution in the Sudbury mining and smelting region of Canada I soil and vegetation contamination by nickel, copper and other metal,” Environ. Conserv. 1, 123–132 (1974).
G. I. James and G. M. Courtin, “Stand structure and growth form of the birch transition community in an industrially damaged ecosystem, Sudbury, Ontario,” Can. J. For. Res. 15, 809–817 (1985).
W. Keller and J. M. Gunn, “Lake water quality improvements and recovering aquatic communities,” in Restoration and Recovery of an Industrial Region: Progress in Restoring the Smelter-Damaged Landscape Near Sudbury, Canada, Ed. by J. M. Gunn (Springer-Verlag, New York, NY, 1995), pp. 67–80.
S. Lanteigne, M. Schindler, A. M. McDonald, K. Skeries, Y. Abdu, N. M. Mantha, M. Murayama, F. C. Hawthorne, and M. F. Hochella Jr., “Mineralogy and weathering of smelter-derived spherical particles in soils: implications for the mobility of Ni and Cu in the surficial environment,” Water, Air Soil Pollut. 223, 3619–3641 (2012).
W. E. Lautenbach, J. Miller, P. J. Beckett, J. J. Negusanti, and K. Winterhalder, “Municipal land restoration program: the regreening process,” in Restoration and Recovery of an Industrial Region: Progress in Restoring the Smelter-Damaged Landscape Near Sudbury, Canada, Ed. by J. M. Gunn (Springer-Verlag, New York, NY, 1995), pp. 109–122.
C. O. Marks, “The ecological role of American elm (Ulmus americana L.) in floodplain forests of northeastern North America,” in Proceedings of the American Elm Restoration Workshop 2016, October 25–27, 2016, Ed. by C. E. Pinchot, et al. (Department of Agriculture, Forest Service, Northern Research Station, Madison, WI, 2016), pp. 74–98.
M. Muñoz-Rojas, A. Chilton, G. S. Liyanage, T. E. Erickson, T. E. Merrit, B. A. Neilan, and M. K. J. Ooi, “Effects of indigenous soil cyanobacteria on seed germination and seedling growth of arid species used in restoration,” Plant Soil 429, 91–100 (2018).
J. Oksanen, F. Guillaume Blanchet, M. Friendly, R. Kindt, P. Legendre, D. McGlinn, P. R. Minchin, R. B. O’Hara, G. L. Simpson, P. Solymos, M. H. H. Stevens, E. Szoecs, and H. Wagner, vegan: Community ecology package, R package version 2.5-7, 2020. https://CRAN.R-project.org/package=vegan.
R. Potvin, “Air quality trends in the Sudbury area 1953–2002,” in Proceedings of the International Mining and the Environment Conf., October 19–27, 2007 (Laurentian Univ., Sudbury, ON, 2007).
C. E. Prescott, D. G. Maynard, and R. Laiho, “Humus in northern forests: friend or foe?” For. Ecol. Manage. 133, 23–36 (2000).
R Core Team, R: A Language and Environment for Statistical Computing (R Foundation for Statistical Computing, Vienna, 2018). https://www.R-project.org/.
B. Rayfield, A. Madhur, and S. Laurence, “Assessing simple versus complex restoration strategies for industrially disturbed forests,” Restor. Ecol. 13, 639–650 (2005).
K. R. Santala, S. Monet, T. McCaffrey, D. Campbell, P. Beckett, and P. Ryser, “Using turf to reintroduce native forest understory plants into smelter-disturbed forests,” Restor. Ecol. 24, 346–353 (2016).
R. J. Steedman, C. J. Allan, R. L. France, and R. S. Kushneriuk, “Land, water and human activity on boreal watersheds,” in Boreal Shield Watersheds Lake Trout Ecosystems in a Changing Environment, Ed. by R. A. Ryder, (CRC Press, Boca Raton, FL, 2004), pp. 59–86.
M. A. Steele, “Evolutionary interactions between tree squirrels and trees: a review and synthesis,” Curr. Sci. 95, 871–876 (2008).
VETAC, Regreening Program 2019 Annual Report “Environmental Planning Initiatives” (City of Greater Sudbury, Sudbury, ON, 2019). https://tinyurl.com/y69ejsee.
K. Winterhalder, “The use of manual surface seeding, liming & fertilization in the reclamation of acid metal-contaminated land in the Sudbury, Ontario mining and smelting region of Canada,” Environ. Technol. Lett. 4, 209–216 (1983).
K. Winterhalder, “Early history of human activities in the Sudbury area and ecological damage to the landscape,” in Restoration and Recovery of an Industrial Region: Progress in Restoring the Smelter-Damaged Landscape Near Sudbury, Canada, Ed. by J. M. Gunn (Springer-Verlag, New York, NY, 1995), pp. 17–31.
K. Winterhalder, “Dynamics of plant communities and soils in revegetated ecosystems: a Sudbury case study,” in Restoration and Recovery of an Industrial Region: Progress in Restoring the Smelter-Damaged Landscape Near Sudbury, Canada, Ed. by J. M. Gunn (Springer-Verlag, New York, NY, 1995), pp. 173–182.
K. Winterhalder, “Environmental degradation and rehabilitation of the landscape around Sudbury, a major mining and smelting area,” Environ. Rev. 4, 185–224 (1996).
ACKNOWLEDGMENTS
This project was conducted as part of an Ontario Universities Program in Field Biology course, Restoration Ecology of a Damaged Watershed, hosted by Laurentian University. The authors thank J. Gunn, E. Bamberger and K. Oman for organization of the course, and E. Szkokan-Emilson, C. Emilson and B. Kielstra for their teaching assistance. We thank Laurentian University and Vale Living with Lakes Center for providing research space, and the Hannah Lake Bible Camp for their kind hospitality.
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AL, MJ, LD, PB and GS conceived and designed the research; AW, MJ and LD performed the study; PB and GS contributed materials/analysis/tools and supervised the study; AW, MJ and LD assessed the data; AW prepared the first manuscript draft; AW, MJ, PB, and GS edited the manuscript.
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Autumn Watkinson, Juckers, M., D’Andrea, L. et al. Ecosystem Recovery of the Sudbury Technogenic Barrens 30 Years Post-Restoration. Eurasian Soil Sc. 55, 663–672 (2022). https://doi.org/10.1134/S106422932205012X
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DOI: https://doi.org/10.1134/S106422932205012X