Plant functional traits as a promising tool for the ecological restoration of degraded tropical metal-rich habitats and revegetation of metal-rich bare soils: A case study in copper vegetation of Katanga, DRC

Ilunga wa Ilunga, Edouard; Mahy, Grégory; Piqueray, Julien; Seleck, Maxime; Shutcha, Mylor Ngoy; Meerts, Pierre; Faucon, Michel-Pierre

doi:10.1016/j.ecoleng.2015.04.084

Article (Scientific journals)

Plant functional traits as a promising tool for the ecological restoration of degraded tropical metal-rich habitats and revegetation of metal-rich bare soils: A case study in copper vegetation of Katanga, DRC

Ilunga wa Ilunga, Edouard; Mahy, Grégory; Piqueray, Julien et al.

2015 • In Ecological Engineering, 82, p. 214-221

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/185550

DOI
10.1016/j.ecoleng.2015.04.084

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Keywords :

Bare soil; Colonizing ability; Ecological restoration; Functional plant traits; Heavy metals; Metallophyte; Phytostabilization; Post-mining; Revegetation; Biodiversity; Conservation; Ecology; Ecosystems; Environmental protection; Forestry; Metals; Plants (botany); Restoration; Soils; Bare soils; Plant traits; Soil conservation; Democratic Republic Congo; Katanga; Xylopodia

Abstract :

[en] Ecological restoration of degraded metal-rich habitats and bare metal-rich soils created by mining activities has nowadays become a major environmental issue to reduce mining impacts on the erosion of biodiversity and the degradation of landscape, soil and water.Studies based on species identification for restoration purposes without reference to plant trait are limited only to local pool of species which makes the interpretation and applications in various ecological contexts rather difficult. This study aims at trait analysis of metal-rich habitats in order to test the differences in plant traits in degraded primary habitat and along a successional gradient in secondary habitats. In this context, investigation of the existence of resilience or the need for ecological restoration is attempted. A second aim of this work is also the identification of traits candidates for appropriate species selection for revegetation of metal-rich bare soils purposes.Results showed that the cover of xylopodia trait values decreases according to the intensity of degradation among habitats, and can be considered an indicator of habitat degradation. Differences of traits values among primary and old secondary habitats highlighted that the absence of resilience of degraded primary steppic savanna was not explained by 14 soil factors measured.The main plant traits for revegetation of metal-rich bare soils are the following: annual life cycle, growth phenology in wet season, depth 0-10. cm of underground system. , bud bank by seeds, dispersule size <2. mm. ×. 2. mm and dispersal mode by adhesion.Future challenge would be to develop new functional ecosystem on metal-rich bare soils promoting biodiversity conservation and ecosystem services related to water and soil protection. This would require the association of species selected for revegetation and phytostabilization from plant traits occurring in secondary metalliferous habitats and species selected from plant traits specific to primary habitats. © 2015 Elsevier B.V.

Disciplines :

Environmental sciences & ecology

Author, co-author :

Ilunga wa Ilunga, Edouard; Ecology, Restoration Ecology and Landscape research Unit, Faculty of Agronomy, University of Lubumbashi, 1825 route Kasapa, Campus universitaire, Lubumbashi, Democratic Republic Congo, Departement of Forest, Nature and Landscape, Biodiversity and Landscape Unit, Gembloux Agro-Bio Tech, University of Liège, 2 Passage des Déportés, Gembloux, Belgium

Mahy, Grégory ; Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage

Piqueray, Julien

Seleck, Maxime ; Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage

Shutcha, Mylor Ngoy; Ecology, Restoration Ecology and Landscape research Unit, Faculty of Agronomy, University of Lubumbashi, 1825 route Kasapa, Campus universitaire, Lubumbashi, Democratic Republic Congo

Meerts, Pierre; Laboratory of Plant Ecology and Biogeochemistry, Université Libre de Bruxelles, 50 Avenue F. Roosevelt, Brussels, Belgium

Faucon, Michel-Pierre; HYdrISE (Hydrogeochemistry Interactions Soil Environment) Unit, Institut Polytechnique LaSalle Beauvais (ISAB-IGAL), 19 rue Pierre Waguet, Beauvais, France

Language :

English

Title :

Publication date :

2015

Journal title :

Ecological Engineering

ISSN :

0925-8574

Publisher :

Elsevier

Volume :

Pages :

214-221

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 04 September 2015

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