The potential of natural regeneration of rocky outcrop vegetation on rupestrian field soils in "Serra do Cipó", Brazil

Medina, Branca Maria Opazo; Fernandes, Geraldo Wilson

doi:10.1590/s0100-84042007000400011

Cited by 45 publications

(34 citation statements)

References 63 publications

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“…Low emergence from seed bank due to large proportions of dormant seeds or the absence of a seed bank has been reported in tropical grassland communities (Medina and Fernandes 2007;Le Stradic 2012). Cu-Co communities are dominated by perennial species which have evolved to resprout after fire and have a low tendency for seed production and seed bank accumulation (Overbeck and Pfadenhauer 2007a;Fidelis et al 2010;Veldman et al 2015).…”

Section: Discussionmentioning

confidence: 96%

Comparison of translocation methods to conserve metallophyte communities in the Southeastern D.R. Congo

Stradic

Séleck

Lebrun

et al. 2015

Environ Sci Pollut Res

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In Katanga, Democratic Republic of Congo, unique metallophyte communities supporting numerous endemic species occurred on the highly mineralized copper cobalt (Cu-Co) hills throughout the province. These hills are economically valuable mineral reserves, mining activities represent therefore a threat to the long-term persistence of these communities. Ex-situ conservation program was set up by a mining company to rescue and conserve the diversity of Cu-Co communities until restoration activities are initiated. Two kind of Cu-Co communities, the steppe and the steppic savanna were translocated using topsoil spreading and whole-turf translocation. In this study we assessed the effectiveness of these two techniques in conserving Cu-Co communities and their potential use in future restoration programs. More than two years after the translocation, whole-turf translocation appeared to be the better technique for ex-situ conservation of endemic Cu-Co species.Not only did whole-turf successfully translocate numerous target species that were not present in the topsoil areas, but it also resulted in fewer ruderal and non-target species compared to topsoil spreading. Topsoil spreading recorded low seedling emergence from seed bank due to large proportions of dormant seeds or the absence of a seed bank, especially for the steppic savanna. Restoration of the steppe, is currently more successful than for steppic savanna where the lack of dominant and structuring species likely contributed to divergence in species composition compared to reference ecosystem. Our study stress the fact that tropical old-growth grasslands, which require probably several centuries to assemble, are difficult to restore or translocate.

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Section: Discussionmentioning

confidence: 96%

Comparison of translocation methods to conserve metallophyte communities in the Southeastern D.R. Congo

Stradic

Séleck

Lebrun

et al. 2015

Environ Sci Pollut Res

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“…Rupestrian grasslands occur on quartzite and sandstone outcrops, which form sandy and shallow soils. It has the greatest extension and complexity in the Espinhaço Mountains; it is dominant above 1000 m. They are the result of the quartzite erosion, forming plain areas with shallow, nutrient poor soils, with poor organic matter content (Medina and Fernandes, 2007). Due to their shallow depths, most of soils associated with rock outcrops are classified as "Neossolos Litólicos" in the Brazilian Soil Classification System, which correspond to the Entisol order of the US Soil Taxonomy and to the Leptosols of the FAO soil classification system (FAO, 1998;EMBRAPA, 1999).…”

Section: Study Sitementioning

confidence: 99%

Soil factors effects on life history attributes of Leiothrix spiralis and Leiothrix vivipara (Eriocaulaceae) on rupestrian grasslands in Southeastern Brazil

Coelho¹,

Martins²,

Figueira³

et al. 2014

Braz. J. Biol.

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In this study, we hypothesized that the life history traits of Leiothrix spiralis and L. vivipara would be linked to soil factors of the rupestrian grasslands and that rosette size would be influenced by soil moisture. Soil analyses were performed from five populations of L. spiralis and four populations of L. vivipara. In each area, three replicates were employed in 19 areas of occurrence of Leiothrix species, and we quantified the life history attributes. The microhabitats of these species show low favorability regarding to soil factors. During the dry season, their rosettes decreased in diameter due the loss of its most outlying leaves. The absence of seedlings indicated the low fecundity of both species. However, both species showed rapid population growth by pseudovivipary. Both L. spiralis and L. vivipara exhibit a kind of parental care that was quantified by the presence of connections between parental-rosettes and ramets. The findings of the present study show that the life history traits are linked to soil factors.Keywords: life history, mountain habitats, pseudovivipary, soil factors; water scarcity. Efeitos de fatores do solo nos atributos de história de vida deLeiothrix spiralis e Leiothrix vivipara (Eriocaulaceae) nos campos rupestres no Sudeste do Brasil.

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“…These areas are abandoned and can not be recovered naturally, becoming favourable to invasion by exotic species (e.g. Pivello et al, 1999;Medina and Fernandes, 2007). Hence, considering the fact that Canga is under potentially exotic species invasion, in view of the vast habitat alteration, and the fact that C. procera has colonized several environments which have distinct biotic and abiotic features, it becomes urgent to test the capacity of C. procera to grow in an ecosystem of Canga.…”

Section: Introductionmentioning

confidence: 99%

Seedling growth of the invader Calotropis procera in ironstone rupestrian field and seasonally dry forest soils

Oliveira¹,

Negreiros²,

Fernandes³

et al. 2009

NBC

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The present study evaluated the growth, biomass allocation and nutrient content in seedlings of the invasive and exotic especies Calotropis procera (Aiton) W.T. Aiton (Apocynaceae), cultured in greenhouse, in soils from two different ecosystems: ironstone rupestrian fi elds (Canga) of Brumadinho, Minas Gerais; and seasonally dry forest (Caatinga), of Serra Talhada, Pernambuco. Seedlings from the Canga treatment were signifi cantly higher in concern to stem length, leaf biomass and total biomass. In respect to nutrient content there were higher phosphorus, iron and zinc levels in the seedlings from the Canga treatment. The iron accumulation indicates the capacity of C. procera to tolerate high levels of iron, which is characteristic of Canga soils. In the Caatinga treatment there was a higher root/ shoot ratio and a higher potassium accumulation in the plant tissues. The obtained results suggest that C. procera displays a good adaptation to the edaphic conditions of the Canga treatment, which indicates an invasive potential towards the Canga ecosystem.

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The potential of natural regeneration of rocky outcrop vegetation on rupestrian field soils in "Serra do Cipó", Brazil

Cited by 45 publications

References 63 publications

Comparison of translocation methods to conserve metallophyte communities in the Southeastern D.R. Congo

Comparison of translocation methods to conserve metallophyte communities in the Southeastern D.R. Congo

Soil factors effects on life history attributes of Leiothrix spiralis and Leiothrix vivipara (Eriocaulaceae) on rupestrian grasslands in Southeastern Brazil

Seedling growth of the invader Calotropis procera in ironstone rupestrian field and seasonally dry forest soils

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