References of "Mahy, Grégory"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailPotential of copper-tolerant grasses to implement phytostabilisation strategies on polluted soils in South D. R. Congo: Poaceae candidates for phytostabilisation
Boisson, Sylvain ULg; Le Stradic, Soizig ULg; Collignon, Julien et al

in Environmental Science and Pollution Research (in press)

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 ... [more ▼]

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. [less ▲]

Detailed reference viewed: 32 (11 ULg)
Full Text
Peer Reviewed
See detailQuantification of anthropogenic effects in the landscape of Lubumbashi
Andre, Marie ULg; Vranken, Isabelle ULg; Boisson, Sylvain ULg et al

in Mahy, Grégory; Colinet, Gilles; Bogaert, Jan (Eds.) Anthropisation au Katanga (in press)

In order to understand the dynamic of the (sub)urbanisation and so, to quantify the anthropogenic effects of the rapid growth of tropical cities, it is crucial to find and apply valuable methods. In this ... [more ▼]

In order to understand the dynamic of the (sub)urbanisation and so, to quantify the anthropogenic effects of the rapid growth of tropical cities, it is crucial to find and apply valuable methods. In this contribution, the transferability of the Rüdisser et al. (2012) «Distance to Nature» hemeroby assessment method to the landscape surrounding the city of Lubumbashi (DRC) is evaluated. That methodology has the advantage of taking structural connectivity into account by computing the distance to natural habitats. As it had never been applied to an African city before, some adjustments (fitting of the local land uses types into the hemeroby levels designed to Austria) and amendments (suppression of the final classification into hemeroby level simplification) are proposed. Moreover, an analysis of the decanal (2002-2013) hemeroby dynamics is presented. Results suggest that the Distance to Nature methodology is transferable but requires good field knowledge to define reference habitats and identify them in the Landsat classified images. There was a dramatic decrease of the «natural» and «near-natural» levels in the study extent during the studied period. In addition, 32% of the land underwent anthropisation increase, mostly around cities and following a ribbon development. [less ▲]

Detailed reference viewed: 112 (58 ULg)
Full Text
Peer Reviewed
See detailEffects of seed traits variation on seedling performance of the invasive weed, Ambrosia artemisiifolia L.
Ortmans, William ULg; Mahy, Grégory ULg; Monty, Arnaud ULg

in Acta Oecologica: International Journal of Ecology (2016), 71

Seedling performance can determine the survival of a juvenile plant and impact adult plant performance. Understanding the factors that may impact seedling performance is thus critical, especially for ... [more ▼]

Seedling performance can determine the survival of a juvenile plant and impact adult plant performance. Understanding the factors that may impact seedling performance is thus critical, especially for annuals, opportunists or invasive plant species. Seedling performance can vary among mothers or populations in response to environmental conditions or under the influence of seed traits. However, very few studies have investigated seed traits variations and their consequences on seedling performance. Specifically, the following questions have been addressed by this work: 1) How the seed traits of the invasive Ambrosia artemisiifolia L. vary among mothers and populations, as well as along the latitude; 2) How do seed traits influence seedling performance; 3) Is the influence on seedlings temperature dependent. With seeds from nine Western Europe ruderal populations, seed traits that can influence seedling development were measured. The seeds were sown into growth chambers with warmer or colder temperature treatments. During seedling growth, performance-related traits were measured. A high variability in seed traits was highlighted. Variation was determined by the mother identity and population, but not latitude. Together, the temperature, population and the identity of the mother had an effect on seedling performance. Seed traits had a relative impact on seedling performance, but this did not appear to be temperature dependent. Seedling performance exhibited a strong plastic response to the temperature, was shaped by the identity of the mother and the population, and was influenced by a number of seed traits. [less ▲]

Detailed reference viewed: 4 (0 ULg)
Full Text
Peer Reviewed
See detailMiombo Woodlands : an endangered forest ecosystem in periurban areas of the southeastern cities of Democratic Republic of Congo
Hick, Aurélie ULg; Kizila Wimana, Pacifique; Tooth, Martin et al

Poster (2015, November 26)

Detailed reference viewed: 17 (1 ULg)
Full Text
See detailCarrières et Paysage - Synthèse paysagère du mémoire
Joris, Alicia ULg; Pitz, Carline ULg; Mahy, Grégory ULg

Learning material (2015)

Cette étude s’intéresse aux notions et aux évaluations du paysage et se base sur des problématiques liées à l’impact, au réaménagement et au potentiel écologique des carrières après exploitation. Elle ... [more ▼]

Cette étude s’intéresse aux notions et aux évaluations du paysage et se base sur des problématiques liées à l’impact, au réaménagement et au potentiel écologique des carrières après exploitation. Elle propose une analyse du caractère paysager des carrières calcaires après exploitation, recolonisées spontanément en Région Wallonne. Prenant en compte les Directives de la Convention Européenne du Paysage (Conseil de l'Europe, 2000), ce travail a pour objectifs (1) de décrire les unités paysagères formées par ces carrières et (2) d’évaluer leur intérêt paysager. Pour cela deux méthodes inspirées du Landscape Character Assessment (LCA) ont été développées : une lecture sous forme de fiche de terrain et une lecture sous forme d’enquête de perception auprès de parties prenantes. Les résultats globaux ont mis en avant le caractère naturel, harmonieux et particulier des paysages formés par les carrières après exploitation. Les caractéristiques clés sont l’importance visuelle des falaises, des plans d’eau, des masses végétales et de la morphologie en paliers. Les jeux de contrastes, notamment des couleurs et des textures, offerts par le végétal, la roche et l’eau se sont également avérés significatifs. Une qualité paysagère et esthétique a été affirmée et l’enquête a montré que les personnes interrogées se sentent bien face à ces paysages. Ceux-ci peuvent être caractérisés comme stimulants, plaisants, dotés d’un important degré de naturalité, mais peu sécurisant. Des valeurs culturelles, historiques, symboliques et écologiques ont également été pointées comme un potentiel pour ces anciennes carrières. Ces constatations, inscrites dans une dynamique paysagère, posent la question sur la nécessité d’intervenir paysagèrement dans ces milieux et sur les bénéfices généreux, offert par la nature, que nous pourrions tirer si on gérait dans un premier temps les problèmes de sécurité. [less ▲]

Detailed reference viewed: 27 (8 ULg)
Full Text
Peer Reviewed
See detailDeveloping biodiversity indicators on a stakeholders' opinions basis: the gypsum industry Key Performance Indicators framework.
Pitz, Carline ULg; Mahy, Grégory ULg; Vermeulen, Cédric ULg et al

in Environmental Science and Pollution Research (2015)

Aims: To establish a common Key Performance Indicators (KPIs) framework for reporting about the gypsum industry biodiversity at the European level. Methods: In order to integrate different opinions and to ... [more ▼]

Aims: To establish a common Key Performance Indicators (KPIs) framework for reporting about the gypsum industry biodiversity at the European level. Methods: In order to integrate different opinions and to reach a consensus framework, an original participatory process approach has been developed among different stakeholder groups: Eurogypsum, European and regional authorities, universities scientists, consulting offices, European and regional associations for the conservation of nature and the extractive industry. The strategy is developed around four main steps: (i) building of a maximum set of indicators to be submitted to stakeholders based on the literature (Focus Group method); (ii) evaluating the consensus about indicators through a policy Delphi survey aiming at the prioritization of indicator classes using the Analytic Hierarchy Process method (AHP) and of individual indicators; (iii) testing acceptability and feasibility through analysis of Environmental Impact Assessments (EIAs) and visits to three European quarries; (iv) Eurogypsum final decision and communication. Results: The resulting framework contains a set of 11 indicators considered the most suitable for all the stakeholders. Conclusions: Our KPIs respond to European legislation and strategies for biodiversity. The framework aims at improving sustainability in quarries and at helping to manage biodiversity as well as to allow the creation of coherent reporting systems. The final goal is to allow for the definition of the actual biodiversity status of gypsum quarries and allow for enhancing it. The framework is adaptable to the local context of each gypsum quarry. [less ▲]

Detailed reference viewed: 119 (30 ULg)
Full Text
See detailAnthropogenic landscape change: synthesis of the concepts and quantification methods
Andre, Marie ULg; Vranken, Isabelle ULg; Mahy, Grégory ULg et al

Conference (2015, August 26)

Anthropogenic disturbances impact the whole biosphere, at least indirectly, and are of major concern in various disciplines and policies. To tackle it, most studies, specific to their thematic, create ... [more ▼]

Anthropogenic disturbances impact the whole biosphere, at least indirectly, and are of major concern in various disciplines and policies. To tackle it, most studies, specific to their thematic, create their own reference framework without connection with related purposes in other disciplines. This results in a plethora of terms and concepts that in turn impedes addressing that issue on a comprehensive way as well as complementarity between studies. Here, we clarify and synthesize the most frequently employed terms to characterise human impact on the environment (anthropisation, naturalness, hemeroby, novel ecosystem, analogous ecosystem, climax, etc.), their synonyms, the nuances and relationships between each of them, as well as the concepts used to designate the responses given by humans to environmental disturbances (restoration, management, conservation). We go on reviewing the methods used to assess anthropogenic changes, exploring different branches of ecology and geography. The strengths and weaknesses of the existing approaches are then used as a basis to develop a new analytical framework: we propose an action-oriented type of naturalness, and we develop a general methodology to quantify landscape anthropisation. Our methodology combines object-oriented and gradient analyses. Moreover, it is based on the assessment of ecosystem disturbance, landscape configuration and dynamics as well as on easily acquired data sets. Our integrated approach of the concern could be at the basis of land planning, environmental restoration and management practices as well as policies. [less ▲]

Detailed reference viewed: 39 (5 ULg)
Peer Reviewed
See detailChallenges for the restoration of dry calcareous grasslands in quarries: does nature need help?
Pitz, Carline ULg; Piqueray, Julien; Harzé, Mélanie ULg et al

Conference (2015, August 26)

In order to maximize the biodiversity potential of dry calcareous grasslands in former quarries two options are available to managers: (i) allow species to spontaneously recolonize the site, (ii ... [more ▼]

In order to maximize the biodiversity potential of dry calcareous grasslands in former quarries two options are available to managers: (i) allow species to spontaneously recolonize the site, (ii) implement technical support for ecosystem restoration. This study aimed at characterizing the spontaneous communities established in dry area of unexploited quarries and at comparing communities encountered to the succession panel of dry grasslands. To evaluate the ecological succession in quarries, three successional stages where defined: (i) less than three years; (ii) three to 20 years; and (iii) more than 20 years after exploitation. For each successional stage, six parcels were selected and 20 1m2 plots were randomly marked in each parcel. All selected parcels presented dry grasslands abiotic conditions: filtering and stony soils and south orientation. During the 2014 vegetation period, percentage cover of higher plant species was recorded in each plot. Explaining environmental variables including coordinates, altitude, slope (degrees), soil depth, exposure, maximum vegetation height, bare ground cover, moss cover, and shrub cover (%) were measured. Our main results showed that, over decades of time, the ecological succession in dry area of unexploited quarries does not approach a typical formation of dry calcareous grassland. Most recolonizations tended to form meadows communities, except for three sites belonging to a specific landscape context. Potential implications for future quarries restoration will be discussed. [less ▲]

Detailed reference viewed: 48 (9 ULg)
Full Text
Peer Reviewed
See detailPromoting quarries biodiversity through partnerships: a Belgian case study
Seleck, Maxime ULg; Harzé, Mélanie ULg; Pitz, Carline ULg et al

Conference (2015, August 25)

Throughout the life cycle of quarries, a large diversity of temporary habitats is generated, sometimes left to evolve to more permanent ones. In many cases, the biological roles of quarries are neglected ... [more ▼]

Throughout the life cycle of quarries, a large diversity of temporary habitats is generated, sometimes left to evolve to more permanent ones. In many cases, the biological roles of quarries are neglected though they are playing a significant role as stepping-stones and regulating green infrastructure in landscapes. In highly urbanized and controlled landscapes, quarries are an exceptional opportunity to maintain rare and threatened transient habitats hosting fugitive species. Such ephemeral biodiversity is hard to manage through a site legal protection status. As exploitation progresses, more permanent, biodiverse habitats settle in abandoned areas but the biologic potential could also be maximized by optimized groundwork through the whole exploitation process. Exploitation plans taking into consideration biodiversity could allow maximizing quarry biodiversity hosting capacity during the exploitation phase and in further rehabilitation schemes. Since 2012 Gembloux Agro-Bio Tech (University of Liège) provides support to FEDIEX - the Belgian federation of extractive industries – in its implementation of a sectorial charter on “Quarries and Biodiversity” that aims at i) raising members’ awareness; ii) promoting the integration of practical recommendations for the protection and management of biodiversity in exploitation plans; iii) quarries’ personnel trainings. Our presentation will trace realizations undertaken under this collaboration, among which the “Mr/Ms Biodiversity” training organized in 2013, 2014 and 2015, the publication of folders popularising the management and enhancement of nature in active quarries and the collaboration in the redaction of a “LIFE in Quarries” project (LIFE Biodiversity) submitted for the 2014 LIFE call. [less ▲]

Detailed reference viewed: 34 (7 ULg)
Peer Reviewed
See detailSpecies-rich anthropogenic grasslands and the problem of afforestation
Buisson, Elise; Le Stradic, Soizig ULg; Alvarado, Swanni et al

Conference (2015, August)

Detailed reference viewed: 8 (0 ULg)
Full Text
See detailPromoting quarries biodiversity through partnerships: a Belgian case study
Seleck, Maxime ULg; Lussis, Benoit; Harzé, Mélanie ULg et al

Conference (2015, June 17)

Throughout the life cycle of quarries, a large diversity of temporary habitats is generated, sometimes left to evolve to more permanent ones. In many cases, the biological roles of quarries are neglected ... [more ▼]

Throughout the life cycle of quarries, a large diversity of temporary habitats is generated, sometimes left to evolve to more permanent ones. In many cases, the biological roles of quarries are neglected though they are playing a significant role as stepping-stones and regulating green infrastructure in landscapes. In highly urbanized and controlled landscapes, quarries are an exceptional opportunity to maintain rare and threatened transient habitats hosting fugitive species. Such ephemeral biodiversity is hard to manage through a site legal protection status. As exploitation progresses, more permanent, biodiverse habitats settle in abandoned areas but the biologic potential could also be maximized by optimized groundwork through the whole exploitation process. Exploitation plans taking into consideration biodiversity could allow maximizing quarry biodiversity hosting capacity during the exploitation phase and in further rehabilitation schemes. In 2012, FEDIEX - the Belgian federation of extractive industries - committed itself to a sectorial charter on “Quarries and Biodiversity”. The charter defines an action plan based on three main axes: i) raising members’ awareness; ii) promoting the integration of practical recommendations for the protection and management of biodiversity in exploitation plans; iii) quarries’ personnel trainings. Since 2012 FEDIEX engaged in a partnership with Gembloux Agro-Bio Tech (University of Liège). Our presentation will trace realizations undertaken under this collaboration, among which the “Mr/Ms Biodiversity” training organized in 2013, 2014 and 2015, the publication of folders popularising the management and enhancement of nature in active quarries and the collaboration in the redaction of a “LIFE in Quarries” project (LIFE Biodiversity) submitted for the 2014 LIFE call. [less ▲]

Detailed reference viewed: 36 (2 ULg)
Full Text
See detailCopperflora – an online species-level database of biology, ecology, geography of the flora from the Katangan Copperbelt (D.R. Congo) to manage their conservation
Boisson, Sylvain ULg; Seleck, Maxime ULg; Le Stradic, Soizig ULg et al

Poster (2015, May 21)

Storage and accessibility to structured data are essential in all fields of scientific research. In ecology, conservation managers regularly use thousands qualitative and quantitative data from different ... [more ▼]

Storage and accessibility to structured data are essential in all fields of scientific research. In ecology, conservation managers regularly use thousands qualitative and quantitative data from different partners and studies. In recent years, online databases concerning climate, species traits and distribution have been developed but few offer a comprehensive tool for the management of species conservation at several steps. The Copperflora database was created in order to include a diversity of informations about species (taxonomy, habitats, phenology, pictures, distribution, etc.) but also information concerning seeds collection, conservation, monitoring and tests applied to target species. Copperflora is meant to be an interactive and a dynamic project enhancing the exchange of data. Our project also contributes to the advance in the understanding of metallophyte communities’ conservation and restoration projects. Our database structure is expected to be easily transferable to other conservation actions. [less ▲]

Detailed reference viewed: 18 (1 ULg)
See detailEtude de la flore spontanée de la carrière de Loën (Belgique) pour de futures restaurations
Pitz, Carline ULg; Monty, Arnaud ULg; Piqueray, Julien et al

Conference (2015, March 04)

Afin de maximiser le potentiel de biodiversité d’une carrière en fin d’exploitation deux options s’offrent au gestionnaire : (1) laisser les espèces recoloniser spontanément le site, (2) mettre en œuvre ... [more ▼]

Afin de maximiser le potentiel de biodiversité d’une carrière en fin d’exploitation deux options s’offrent au gestionnaire : (1) laisser les espèces recoloniser spontanément le site, (2) mettre en œuvre des appuis techniques à la restauration d’écosystèmes. Une méthode hybride associant une recolonisation naturelle et une assistance technique peut également être une opportunité pour le gestionnaire. La recolonisation spontanée des carrières peut, dans certains cas, créer une mosaïque d’habitats diversifiés pour des coûts faibles par rapport à des projets de réhabilitation ou de restauration couteux. Toutefois, l’intérêt biologique des habitats issus de successions spontanées peut fortement varier d’un site à l’autre en fonction de l’historique de gestion, des conditions climatiques et édaphiques locales, de l’isolement du site dans le paysage et du pool régional d’espèces présentes. Afin d’évaluer la nécessité ou non de mise en œuvre d’une restauration active d’habitats en carrière, il est nécessaire de caractériser les habitats issus de la succession spontanée ainsi que leur valeur biologique. L’évaluation de l’intérêt biologique d’un habitat prend en compte à la fois la diversité biologique locale (diversité alpha) et l’originalité des communautés présentes par rapport à un référentiel paysager (diversité béta). Ce projet a pour objectif de caractériser la flore recolonisant spontanément les zones xériques non exploitées dans une carrière située en Belgique (Loën, en région wallonne), du point de vue de la diversité spécifique et de la fonctionnalité écologique. Les communautés végétales ont été caractérisées au sein du site de Loën (diversité alpha) et d’un ensemble d’autres carrières représentatives de la diversité des contextes géographiques des carrières calcaires en Région wallonne (diversité béta). [less ▲]

Detailed reference viewed: 100 (39 ULg)
Full Text
Peer Reviewed
See detailImplication of plant-soil relationships for conservation and restoration of copper-cobalt ecosystems
Faucon, M.-P.; Le Stradic, Soizig ULg; Boisson, Sylvain ULg et al

in Plant and Soil (2015)

Background: Chemical soil factors play an important role in generating and maintaining plant diversity. Naturally metal-enriched habitats support highly distinctive plant communities consisting of many ... [more ▼]

Background: Chemical soil factors play an important role in generating and maintaining plant diversity. Naturally metal-enriched habitats support highly distinctive plant communities consisting of many rare and endemic species. Species of these plant communities possess remarkable physiological adaptations and are now being considered key elements in the implementation of green technologies aimed at phytoremediation of contaminated soils and post-mined soils. Several studies have emphasised that industrial mineral extraction results in serious damage to ecosystems and serious threats to human health and leads to the extinction of metallophyte species. In the southeastern Democratic Republic of the Congo (DRC), mining activities represent a threat to the long-term persistence of communities located on metalliferous copper and cobalt outcrops and their associated endemic metallophytes, which are currently considered some of the most critically endangered plants in the world. Scope: Plant diversity conservation of metal-rich soils must assess soil-plant relationships at different scales (ecosystems, communities, and populations) to define in-situ and ex-situ conservation and restoration projects. This paper proposes a review of soil-plant relationships involved in plant diversity and endemism and their implications for biodiversity conservation and restoration. © 2015 Springer International Publishing Switzerland [less ▲]

Detailed reference viewed: 18 (1 ULg)
Full Text
Peer Reviewed
See detailWhere tree planting and forest expansion are bad for biodiversity and ecosystem services
Veldman, J.W.; Overbeck, G.E.; Negreiros, D. et al

in Bioscience (2015)

Detailed reference viewed: 146 (3 ULg)
Full Text
Peer Reviewed
See detailAssessment of soil metal distribution and environmental impact of mining in Katanga (Democratic Republic of Congo)
Pourret, Olivier; Lange, Bastien; Bonhoure, Jessica et al

in Applied Geochemistry (2015)

Metal and metalloid (As, Cd, Co, Cu, Pb and Zn) distribution in soils from the Katanga Copperbelt (Democratic Republic of Congo) is investigated in order to characterize the environmental impacts of ... [more ▼]

Metal and metalloid (As, Cd, Co, Cu, Pb and Zn) distribution in soils from the Katanga Copperbelt (Democratic Republic of Congo) is investigated in order to characterize the environmental impacts of mining and smelting activities in that area. The concentrations of Cu, Co, As, Zn, Pb and Cd in soils from mining sites are higher than in non-metalliferous sites and above permissible metal and metalloid concentrations in soils. Moreover, the fractionation and mobility of Co, and Cu in such environment is assessed using the application of both ammonium acetate-EDTA extraction and speciation modeling (WHAM 6). The resulting data set covers wide range of environmental conditions (pH, trace metals concentration, natural soils and soils affected by mining and ore processing). These extractions show that only a small fraction of Cu and Co is mobile, with variation depending on sites: mobility is higher in soils affected by mining and ore processing. The strong affinity of Mn-oxides for Co may explain lower Co mobility in Mn-rich soils. The high Mn and Fe contents of Cu-Co soils from Katanga may actually exert a protective effect against the toxic effects of Co. Finally, Cu-Co speciation modeling of contaminated sites emphasizes that organic matter strongly sorb Cu whereas Co speciation is mostly by Mn content. This type of study leads to a better understanding of metal fractionation and can guide to define different practices of phytoremediation. © 2015 Elsevier Ltd. [less ▲]

Detailed reference viewed: 24 (5 ULg)
Full Text
Peer Reviewed
See detailPlant 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 ULg; Piqueray, Julien et al

in Ecological Engineering (2015), 82

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 ... [more ▼]

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. [less ▲]

Detailed reference viewed: 17 (0 ULg)