[en] In southeastern D. R. Congo, about 550 metallophytes grow on soils with high copper and cobalt concentrations, 57 of which are endemics to these metalliferous environments. About 70% of those endemics are considered threatened by destruction of habitats through mining activities. To provide guidelines for future restoration programs, the edaphic ecological niches of eight copper endemics were studied using a pragmatic sampling method adapted for urgent conservation needs. Niches were modelled using violin plot along Cu, Co and C:N gradients representing the two main independent edaphic gradients among nine edaphic variables (C, N, C:N, K, P, pH, Co, Cu, and Mn). Copper endemics presented distinct edaphic niches along the copper and cobalt gradients, but differentiation was lower along the C:N gradient. In addition, edaphic elements presented covariations among them and metalliferous soils had higher nutrient and element content compared to the non-metalliferous soils of the region dominated by the Miombo woodland. The complexity of the soil composition and the edaphic niches of copper endemics revealed an important challenge in the implementation of the species conservation and the habitat restoration strategies of post-mining sites.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Boisson, Sylvain ; Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Monty, Arnaud ; Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Lebrun, Julie
Seleck, Maxime ; Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Mahy, Grégory ; Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Language :
English
Title :
Edaphic niches of metallophytes from southeastern Democratic Republic of Congo: implications for post-mining restoration
Baker A.J.M., Ernst W.H.O., Van der Ent A., Malaisse F., Ginocchio R. Metallophytes: the unique biological resource, its ecology and conservational status in Europe, central Africa and Latin America. Ecology of industrial pollution 2010, 7-40. Cambridge University Press. L. Batty, K. Hallberg (Eds.).
Bamps P. Flore d'Afrique centrale (Zaïre-Rwanda-Burundi) 1993, Jardin Botanique National de Belgique, Meise, Belgique.
Bizoux J., Brevers F., Meerts P., Graitson E., Mahy G. Ecology and conservation of Belgian populations of Viola calaminaria, a metallophyte with a restricted geographic distribution. Belgian Journal of Botany 2004, 137(1):91-104. [Retrieved from http://www.jstor.org/stable/10.2307/20794541].
Board of trustees Kew Royal Botanic Gardens Flora Zambesiaca 2010, Royal Botanic Gardens Kew, Richmond.
Brooks, R.R., & Malaisse, F. (1985). The Heavy Metal Tolerant Flora of Southcentral Africa: a mutlidisciplinary approach. Rotterdam: A.A. Balkema.
CWEA-Compendium Wallon d'Echantillonnages et d'Analyses Extraction des éléments minéraux disponibles dans les terres agricoles 2014, Institut Scientifique de Service Public, Liège, Belgium.
Champluvier D. New and overlooked Acanthaceae taxa from D.R. Congo Rwanda and Burundi: (1) the genus Barleria. Plant Ecology and Evolution 2011, 144(1):82-95. 10.5091/plecevo.2011.388.
Chipeng F.K., Hermans C., Colinet G., Faucon M.-P., Ngongo M., Meerts P., Verbruggen N. Copper tolerance in the cuprophyte Haumaniastrum katangense (S. Moore) P.A. Duvign & Plancke. Plant and Soil 2010, 328(1-2):235-244. 10.1007/s11104-009-0105-z.
Clewell A., Rieger J., Munro J. Guidelines for developing and managing ecological restoration projects. Society for Ecological Restoration International 2005, 1-16. [Retrieved from www.ser.org].
Devictor V., Clavel J., Julliard R., Lavergne S., Mouillot D., Thuiller W., Mouquet N. Defining and measuring ecological specialization. Journal of Applied Ecology 2010, 47(1):15-25. 10.1111/j.1365-2664.2009.01744.x.
Duvigneaud P., Denaeyer-De Smet S. Etudes sur la végétation du Katanga et de ses sols métallifères. Communication n°7 Cuivre et végétation au Katanga. Bulletin de La Société Royale de Botanique de Belgique 1963, 96(2):93-231.
Duvigneaud P., Timperman J. Etudes sur la végétation du Katanga et de ses sols métallifères. Communication n°3 Etudes sur le genre Crotalaria. Bulletin de La Société Royale de Botanique de Belgique 1959, 91(2):135-176.
Ellstrand N.N.C., Elam D.D.R. Population genetic consequences of small population size: implications for plant conservation. Annual Review of Ecology and Systematics 1993, 24(1993):217-242.
Faucon M.-P., Shutcha M.N., Meerts P. Revisiting copper and cobalt concentrations in supposed hyperaccumulators from SC Africa: influence of washing and metal concentrations in soil. Plant and Soil 2007, 301(1-2):29-36. 10.1007/s11104-007-9405-3.
Faucon M.-P., Meersseman A., Shutcha M.N., Mahy G., Luhembwe M.N., Malaisse F., Meerts P. Copper endemism in the Congolese flora: a database of copper affinity and conservational value of cuprophytes. Plant Ecology and Evolution 2010, 143(1):5-18. 10.5091/plecevo.2010.411.
Faucon M.-P., Parmentier I., Colinet G., Mahy G., Ngongo Luhembwe M., Meerts P. May rare metallophytes benefit from disturbed soils following mining activity? The case of the crepidorhopalon tenuis in katanga (D. R. Congo). Restoration Ecology 2011, 19(3):333-343. 10.1111/j.1526-100X.2009.00585.x.
Faucon M.-P., Chipeng F., Verbruggen N., Mahy G., Colinet G., Shutcha M., Meerts P. Copper tolerance and accumulation in two cuprophytes of South Central Africa Crepidorhopalon perennis and C. tenuis (Linderniaceae). Environmental and Experimental Botany 2012, 84:11-16. 10.1016/j.envexpbot.2012.04.012.
Godefroid S., Van de Vyver A., Massengo Kalenga W., Handjila Minengo G., Rose C., Ngongo Luhembwe M., Mahy G. Germination capacity and seed storage behaviour of threatened metallophytes from the Katanga copper belt (DR Congo): implications for ex situ conservation. Plant Ecology and Evolution 2013, 146(2):183-192. 10.5091/plecevo.2013.745.
Guisan A., Edwards T.C., Hastie T. Generalized linear and generalized additive models in studies of species distributions: setting the scene. Ecological Modelling 2002, 157(2-3):89-100. 10.1016/S0304-3800(02)00204-1.
Hall J.L. Cellular mechanisms for heavy metal detoxification and tolerance. Journal of Experimental Botany 2002, 53(366):1-11. [Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/11741035].
Heikkinen J., Mäkipää R. Testing hypotheses on shape and distribution of ecological response curves. Ecological Modelling 2010, 221(3):388-399. 10.1016/j.ecolmodel.2009.10.030.
Hintze J., Nelson R. Violin plots: a box plot-density trace synergism. The American Statistician 1998, 52(2):181-184.
International Council on Mining and Minerals (ICMM) Good practice guidance for mining and biodiversity 2006, ICMM, London.
Ilunga wa Ilunga E., Séleck M., Colinet G., Meerts P., Mahy G. Small-scale diversity of plant communities and distribution of species niches on a copper rock outcrop in Upper Katanga, DR Congo. Plant Ecology and Evolution 2013, 146(2):173-182. 10.5091/plecevo.2013.816.
Kew Royal Botanic Gardens Flora of tropical East Africa. Flora of tropical East Africa 2008, Kew Royal Botanic Gardens, UK. R.M. Polhill (Ed.).
Lakanen E., Erviö R. A comparison of eight extractants for the determination of plant available micronutrients in soil. Acta Agralia Fennica 1971, 123:223-232.
Lange B., Faucon M.-P., Meerts P., Shutcha M., Mahy G., Pourret O. Prediction of the edaphic factors influence upon the copper and cobalt accumulation in two metallophytes using copper and cobalt speciation in soils. Plant and Soil 2014, 379(1-2):275-287. 10.1007/s11104-014-2068-y.
Leteinturier B., Malaisse F. The copper flora of Katanga: a phytogeographical analysis. Geo-Eco-Trop 1999, 23:31-48.
Leteinturier B. Evaluation du potential phytocénotique des gisements cupriferes d'Afrique centro-australe en vue de la phytoremédiation de sites pollués par l'activité 2002, Faculté des Sciences Agronomiques de Gembloux.
Malaisse F., Brooks R.R., North P. Colonisation of modified metalliferous environments in Zaire by the copper flower Haumaniastrum katangense. Plant and Soil 1982, 64:289-293.
Margesin R., Schinner F. Manual for soil analysis - monitoring and assessing soil bioremediation: monitoring and assessing soil bioremediation 2005, Springer. Springer Science & Business Media (Ed.).
O'Dell R.E., Claassen V.P. Relative performance of native and exotic grass species in response to amendment of drastically disturbed serpentine substrates. Journal of Applied Ecology 2006, 43(5):898-908. 10.1111/j.1365-2664.2006.01193.x.
Palacio S., Escudero A., Montserrat-Martí G., Maestro M., Milla R., Albert M.J. Plants living on gypsum: beyond the specialist model. Annals of Botany 2007, 99(2):333-343. 10.1093/aob/mcl263.
Pourret O., Lange B., Houben D., Colinet G., Shutcha M., Faucon M.-P. Modeling of cobalt and copper speciation in metalliferous soils from Katanga (Democratic Republic of Congo). Journal of Geochemical Exploration 2015, 149:87-96. 10.1016/j.gexplo.2014.11.011.
R Development Core Team (2010). A language and environment for statistical computing. In R Foundation for Statistical Computing (Ed.). Vienna, Austria.
Saad L., Parmentier I., Colinet G., Malaisse F., Faucon M.-P., Meerts P., Mahy G. Investigating the vegetation-soil relationships on the copper-cobalt rock outcrops of katanga (D R. Congo), an essential step in a biodiversity conservation plan. Restoration Ecology 2012, 20(3):405-415. 10.1111/j.1526-100X.2011.00786.x.
Séleck M., Bizoux J.-P., Colinet G., Faucon M.-P., Guillaume A., Meerts P., Piqueray J., Mahy G. Chemical soil factors influencing plant assemblages along copper-cobalt gradients: implications for conservation and restoration. Plant & Soil 2013, 373(1/2):455-469. 10.1007/s11104-013-1819-5.
Séleck M., Lebrun J., Boisson S., Le Stradic S., Masengo Kalenga W., Mahy G. Guide to Cu-Co species of concern regeneration - V2.2 2013, Gembloux.
Shaw J. Heavy metal tolerance in plants: evolutionary aspects 1990, CRC Press Inc., New York, USA.
Tadros T.T.M. Evidence of the presence of an edapho-biotic factor in the problem of serpentine tolerance. Ecology 1957, 38(1):14-23.
Vetaas O.R. Realized and potential climate niches: a comparison of four Rhododendron tree species. Journal of Biogeography 2002, 29:545-554.
Whiting S.N., Reeves R.D., Richards D., Johnson M.S., Cooke J.A., Malaisse F., Baker A.J.M. Research priorities for conservation of metallophyte biodiversity and their potential for restoration and site remediation. Restoration Ecology 2004, 12(1):106-116.
Wiser S.K., Peet R.K., White P.S. Prediction of rare-plant occurence: a Southern appalachian example. Ecological Applications 1998, 8(4):909-920.
Yee T.W., Mitchell N.D. Generalized additive models in plant ecology. Journal of Vegetation Science 1991, 2:587-602.
Zaniewski A.E., Lehmann A., Overton J.M. Predicting species spatial distributions using presence-only data: a case study of native New Zealand ferns. Ecological Modelling 2002, 157(2-3):261-280. 10.1016/S0304-3800(02)00199-0.
