Article (Scientific journals)
Potential of copper-tolerant grasses to implement phytostabilisation strategies on polluted soils in South D. R. Congo: Poaceae candidates for phytostabilisation
Boisson, Sylvain; Le Stradic, Soizig; Collignon, Julien et al.
2016In Environmental Science and Pollution Research
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Keywords :
poaceae; species response curve; generalised additive model; seed production; cover; copper; cobalt
Abstract :
[en] Phytostabilisation (i.e. using plants to immobilise contaminants) represents a well-known technology to hamper heavy metal spread across landscapes. In Katanga (D. R. Congo), Microchloa altera, a tolerant grass from the copper hills, was recently identified as a candidate species to stabilise copper in the soil. More than 50 grasses compose this flora, which may be studied to implement phytostabilisation strategies. However, little is known about their phenology, tolerance, reproductive strategy or demography. The present study aims to characterize the other Poaceae that may be used in phytostabilisation purposes based on the following criteria: their ecological distribution, seed production at two times, abundance, soil coverage and the germination percentage of their seeds. We selected seven perennial Poaceae that occur on the copper hills. Their ecological distributions (i.e. species response curves) have been modelled along copper or cobalt gradients with generalized additive models using logic link based on 172 presence/absence samples on three sites. For other variables, a total of 69 quadrats (1 m2) were randomly placed across three sites and habitats. For each species, we compared the number of inflorescence-bearing stems (IBS) by plot, the percentage of cover, the number of seeds by IBS and the estimated number of seeds by plot between sites and habitat. Three species (Andropogon schirensis, Eragrostis racemosa and Loudetia simplex) were very interesting for phytostabilisation programs. They produced a large quantity of seeds and had the highest percentage of cover. However, A. schirensis and L. simplex presented significant variations in the number of seeds and the percentage of cover according to site.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Boisson, Sylvain ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Le Stradic, Soizig ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Collignon, Julien
Seleck, Maxime  ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Malaisse, François ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Shutcha, Mylor Ngoy
Faucon, Michel-Pierre
Mahy, Grégory ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Language :
English
Title :
Potential of copper-tolerant grasses to implement phytostabilisation strategies on polluted soils in South D. R. Congo: Poaceae candidates for phytostabilisation
Publication date :
2016
Journal title :
Environmental Science and Pollution Research
ISSN :
0944-1344
eISSN :
1614-7499
Publisher :
Springer Science & Business Media B.V.
Special issue title :
How can we restore the biodiversity and ecosystem services in mining and industrial sites?
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
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