Vegetation strategy of Vellozia crinita (Velloziaceae)

Alves, Ruy José Válka; Kolbek, Jiří

doi:10.2478/s11756-010-0005-y

Cited by 9 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nos campos rupestres sobre quartzito, a dominância de V. compacta foi conspícua nos campos inclinados com afl oramentos (QAF) pela mesma razão. De acordo com Alves & Kolbek (2010), solos instáveis e arenosos, como os encontrados nos platôs sobre quartzito, não são propícios ao desenvolvimento de espécies arbustivas perenes de Vellozia.…”

Section: Discussionunclassified

Fitossociologia de campos rupestres quartzíticos e ferruginosos no Quadrilátero Ferrífero, Minas Gerais

et al. 2012

View full text Add to dashboard Cite

Fitossociologia de campos rupestres quartzíticos e ferruginosos no Quadrilátero Ferrífero, Minas Gerais RESUMO(Fitossociologia de campos rupestres quartzíticos e ferruginosos no Quadrilátero Ferrífero, Minas Gerais). Foram realizados estudos fi tossociológicos de duas áreas em campos rupestres quartzíticos e ferruginosos (sobre itabirito) de MG. Objetivou-se verifi car se os litotipos e as geoformas infl uenciam a vegetação dessas comunidades. Os campos rupestres de ambas litologias foram estratifi cados pelas geoformas e fi tofi sionomias em: 1. Áreas inclinadas, com campos limpos 2. Platôs, com campos limpos e 3. Porções inferiores dos perfi s, com campos sujos. Amostraram-se 60 parcelas (10x10m), 10 em cada habitat. Estimou-se a cobertura e calculou-se a frequência, dominância e valor de importância (VI) das espécies. Calculou-se a diversidade pelo índice de Shannon-Wiener (H') e equabilidade de Pielou (J') para cada habitat e a similaridade fl orística entre eles pelo índice de Jaccard e análise de agrupamentos. Inventariou-se 165 espécies nos campos quartzíticos e 160 nos ferruginosos. Nos campos rupestres declivosos e nos platôs ferruginosos Vellozia compacta foi a espécie de maior VI. Nos campos inclinados com afl oramentos quartzíticos Lagenocarpus rigidus foi a espécie com maior VI, seguida por algumas fanerófi tas. Echinolaena infl exa foi a espécie de maior importância nos platôs sobre quartzito, seguida por algumas fanerófi tas e várias hemicriptófi tas. ABSTRACT(Phytosociology of quartzitic and ferruginous rocky outcrop areas in the Quadrilátero Ferrífero, Minas Gerais). Th e fl oristic composition and phytosociological structure of two areas with quartzitic and ferruginous (itabiritic) campos rupestres in the Quadrilátero Ferrífero region of Minas Gerais state were studied. Th e aim of this research was to determine if geology and geomorphology infl uence the vegetation of these communities. Th e campos rupestres in both lithologies were stratifi ed in three kinds of geomorphologic/phytophysionomic habitats: 1. Slopes with grasslands; 2. Plateaus with grasslands and 3. Lower slopes with woody savannas. In each habitat, 10 plots (10x10m) were randomly defi ned, totaling 60 plots. Frequency, dominance and importance value (IV) parameters were calculated for each species. Shannon-Wiener (H') and Pielou (J') indexes were estimated for each habitat. Jaccard index and clustering analysis were used to assess the fl oristic similarity of the diff erent habitats. Th ere were 165 species in the quartzitic and 160 in the ferruginous grasslands. Vellozia compacta was the species with the highest IV in both ferruginous grasslands. Lagenocarpus rigidus was the species with the highest IV in quartzitic sloped areas, followed by several phanerophytes. Echinolaena infl exa was the species with the highest IV in quartzitic plateaus followed by several phanerophytes and many hemicryptophytic species. Th e woody savannas in ferruginous areas were dominated by E. erythropappus and V. compacta, while in quartzitic area...

show abstract

Section: Discussionunclassified

Fitossociologia de campos rupestres quartzíticos e ferruginosos no Quadrilátero Ferrífero, Minas Gerais

et al. 2012

View full text Add to dashboard Cite

show abstract

“…This species only grows among rock outcrops, which occur in higher proportion in ferruginous campos rupestres, and is absent in quartzite plateaus where bare rocks are rare. Alves & Kolbek (2010) related that mechanically unstable sandy soils, like those found in the quartzitic plateaus, can be unavailable for the longevous, shrubby species of Vellozia.…”

Section: Discussionmentioning

confidence: 99%

Life-form spectra of quartzite and itabirite rocky outcrop sites, Minas Gerais, Brazil

et al. 2011

View full text Add to dashboard Cite

Life-form spectra of quartzite and itabirite rocky outcrop sites, Minas Gerais, Brazil. Biota Neotrop. 11(2): http://www.biotaneotropica.org. br/v11n2/en/abstract?article+bn01311022011Abstract: Vascular species and their respective life-forms and coverage were recorded in a Brazilian quartzite and itabirite rocky outcrop site at Serra de Ouro Preto, producing the floristic, frequency and vegetational spectra. Three habitats in both lithologies were defined by geomorphology as: 1) Sloped areas near the mountain summit, with grasslands; 2) Plateaus in the middle of the slope, with grasslands; and 3) Lower and/or concave parts of the slopes, with woody savannas. The life-forms followed Raunkiaer's System. We aimed to answer the following questions: Do quartzite and itabirite rocky outcrops have different biological spectra? Are the biological spectra different in the geomorphologic habitats? Do the floristic, vegetational and frequency spectra differ from one another? What spectrum stacks up to a rocky outcrop physiognomy description? The results portrayed that: a) the most represented life-forms were the phanerophytes and hemicryptophytes; b) the floristic and frequency spectra did not differ from each other, but both differed from the vegetational one; c) all the floristic spectra were similar, but there were significant differences in the frequency and vegetational spectra among the lithology and geomorphology habitats; d) higher phanerophyte and lesser hemicryptophyte coverages were found in the itabirite areas and also in the lower or concave parts of the slopes of both lithologies; and e) the vegetational spectrum was more efficient for the studied rocky outcrop comparison. Relationships between the environmental aspects and life-form spectra are discussed. This study will help advance the development of restoration projects for these areas by adding knowledge of their flora composition, structure and function. Keywords: biological spectrum, ferruginous rocky outcrops, Quadrilátero Ferrífero, Raunkiaer.MESSIAS, M.C.T.B., LEITE, M.G.P., MEIRA-NETO, J.A.A., KOZOVITS, A.R. Formas de vida em campos rupestres sobre quartzito e itabirito, em Minas Gerais, Brasil. Biota Neotrop. 11(2): http://www. biotaneotropica.org.br/v11n2/pt/abstract?article+bn01311022011Resumo: Realizou-se um levantamento das espécies vasculares e suas respectivas formas de vida e coberturas, em campos rupestres na Serra de Ouro Preto, sobre quartzito e itabirito, para construção dos espectros florísticos, de freqüência e vegetacional. Em cada litologia foram delimitados, pela geomofologia, três tipos de habitats: 1) Áreas inclinadas, nos topos das montanhas, com campos limpos; 2) Platôs, na parte mediana das encostas, com campos limpos e 3) Partes mais baixas ou côncavas das encostas, com campos sujos. As formas de vida seguiram o sistema de Raunkiaer. Averiguaram-se as seguintes questões: Campos rupestres sobre itabirito e quartzito possuem diferentes espectros biológicos? Os habitats estratificados pela geomorfologia diferem quanto aos espec...

show abstract

“…(e.g. Mello-Silva, 1995;Alves and Kolbek, 2010) and ecological strategies in Vellozia (Oliveira et al, 2005(Oliveira et al, , 2015(Oliveira et al, , 2016Teodoro, 2014;Alcantara et al, 2015), within this background of diversification rate slowdown, are promising routes toward a better understanding of adaptive radiation in the campos rupestres.…”

Section: African Versus South American Diversification Of Velloziaceaementioning

confidence: 99%

Accelerated diversification and functional trait evolution in Velloziaceae reveal new insights into the origins of the campos rupestres’ exceptional floristic richness

2018

View full text Add to dashboard Cite

show abstract

Vegetation strategy of Vellozia crinita (Velloziaceae)

Cited by 9 publications

References 13 publications

Fitossociologia de campos rupestres quartzíticos e ferruginosos no Quadrilátero Ferrífero, Minas Gerais

Fitossociologia de campos rupestres quartzíticos e ferruginosos no Quadrilátero Ferrífero, Minas Gerais

Life-form spectra of quartzite and itabirite rocky outcrop sites, Minas Gerais, Brazil

Accelerated diversification and functional trait evolution in Velloziaceae reveal new insights into the origins of the campos rupestres’ exceptional floristic richness

Contact Info

Product

Resources

About