Orchidaceae do Parque Estadual de Ibitipoca, MG, Brasil

Neto, Luiz Menini; Alves, Ruy José Válka; Barros, Fábio de; Forzza, Rafaela Campostrini

doi:10.1590/s0102-33062007000300015

Cited by 50 publications

(20 citation statements)

References 14 publications

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“…Chama atenção o número de táxons restritos ao Domínio Atlântico (Paepalanthus calvus, P. macaheensis, P. dupatya, P. harmsii e P. leiseringii), enquanto apenas P. freyreissii e P. planifolius ocorrem disjuntamente no Espinhaço e na Serra da Mantiqueira. Estes números corroboram autores anteriores (Menini Neto et al 2007a, Ferreira et al 2009, Borges et al 2010) que demonstraram que a flora da Serra do Ibitipoca é mais similar a outras áreas de altitude do Domínio Atlântico do que com a flora da Cadeia do Espinhaço. Porém, infelizmente, não existem levantamos mais acurados para a família em áreas de campos de altitude da Floresta Atlântica para que esta comparação seja feita com mais precisão.…”

Section: Resultsunclassified

A família Eriocaulaceae no Parque Estadual do Ibitipoca, Minas Gerais, Brasil

2011

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-(Eriocaulaceae in the Ibitipoca State Park, Minas Gerais, Brazil). In Brazil, Eriocaulaceae comprise ca. 600 species and nine genera. Most of the taxonomic and morphological diversity center is concentrated in the campos rupestres from the Espinhaço Range. The Ibitipoca State Park (PEIB) is located within the Mantiqueira complex and is composed of different vegetation types. The present study is the floristic treatment of Eriocaulaceae species occurring in the PEIB. Twenty-two species were found, sixteen of Paepalanthus, two of Comanthera, two of Syngonanthus, one of Leiothrix, and one of Eriocaulon. These species occur in various habitats, but are frequently found in open grass dominated formations. An identification key, line drawings, descriptions, besides comments on morphological variation and geographical distribution are provided. Two new synonyms are proposed: Paepalanthus ibitipocencis Silveira = P. calvus Körn. e Paepalanthus orthoblepharus Silveira = P. henriquei Silveira & Ruhland.

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Section: Resultsunclassified

A família Eriocaulaceae no Parque Estadual do Ibitipoca, Minas Gerais, Brasil

2011

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“…The ecosystem is characterized by an open vegetation with a negligible tree layer (Alves and Kolbeck, 2010) and is bound to a mosaic of rocky outcrops and shallow white sands in the mountain ranges from Minas Gerais, Bahia and Goiás states of Brazil . Also showing similarity to other azonal outcrop vegetations from the Neotropics (Alves and Kolbeck, 2010), this species-rich and diverse ecosystem with many endemics (Conceição et al, 2007;Menini Neto et al, 2007;Gastauer et al, 2012) is composed by specific plant communities Conceição and Pirani, 2005). The aim of this paper was to estimate the total number of vascular plants of all campos rupestres from the Itacolomi State Park, Minas Gerais, Brazil, by the taxon ratio model and by extrapolations of the species-area relationship.…”

Section: Introductionmentioning

confidence: 81%

Quantas espécies de plantas vasculares existem em um hotspot local de biodiversidade no sudeste do Brasil?

Gastauer¹,

Meira‐Neto

2013

Neotropical Biology and Conservation

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Scientific information about the distribution of species richness and diversity is necessary for full comprehension of our evolutionary heritage forming a powerful tool for the development of nature conservation strategies. The aim of this article was to estimate the vascular plant species richness of the campos rupestres from the Itacolomi State Park (ISP) in order to verify the park´s classification as a local hotspot of biodiversity and to outline the status quo of knowledge about biodiversity in the region. For that, the species richness of two phytosociological surveys of 0.15 ha each were extrapolated using (a) the species-area relationship fitted by the power and the logarithmic model as well as (b) the taxon ratio model. The taxon ratio model estimates total vascular plant species richness to 1109 species using seven different taxa. Extrapolations of different fittings of the species-area relationships calculate the complete park's richness to values between 241 and 386 (logarithmic model), and 3346 to 10421 (power model). These extrapolations are far beyond realistic: the logarithmic model underestimates the park´s species richness, because more than 520 vascular plant species have already been registered in the park. On the other hand, it is not plausible that one-fourth or more of all species registered so far in the Atlantic Tropical Forest Biome occur in the ISP as indicated by the extrapolation with the power model. The most realistic estimation was achieved by the taxon ratio model. Although confidence intervals are large, the species richness estimated by this method legitimates the classification of the ISP as a local hotspot of biodiversity, but this value also outlines the lack of knowledge about biodiversity in this region and the urgent need for more taxonomical and ecological research.Key words: campos rupestres, species-area relationship, taxon ratios, Espinhaço Mountain Range. ResumoInformação científica sobre a distribuição de riqueza e diversidade de espécies é necessária para a compreensão plena da nossa herança evolutiva formando uma ferramenta poderosa para o desenvolvimento de estratégias de conservação de natureza. O objetivo deste trabalho constituiu-se em estimar a riqueza de plantas vasculares nos campos rupestres do Parque Estadual do Itacolomi (PEI) para justificar a sua classificação como um hotspot local de biodiversidade e para delinear o status quo do conhecimento sobre a biodiversidade na região. Para isso, o número de espécies encontradas em dois levantamentos fitossociológicos de 0,15 ha cada foi extrapolado usando (a) a relação espécie-área ajustada pelo modelo de potência e pelo modelo logarítmico bem como (b) o modelo de relação de táxons. O modelo de relação de táxons estimou a riqueza total para 1.109 espécies usando sete diferentes táxons. Extrapolações de diferentes modelos da relação espécie-área estimaram a riqueza 133Neotropical Biology and Conservation How many vascular plant species are there in a local hotspot of biodiversity in Southeastern Brazil?...

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“…Especificamente para o Domínio Atlântico, Orchidaceae é a família mais rica, figurando frequentemente como a mais representativa em estudos realizados em área com predominância de campo de altitude ou campo rupestre, como no PESB (Leoni & Tinte 2004, Caiafa & Silva 2005, PEI (Menini Neto et al 2007) e Serra Negra (Abreu et al 2011).…”

Section: Floraunclassified

Flora vascular da Serra da Pedra Branca, Caldas, Minas Gerais e relações florísticas com áreas de altitude da Região Sudeste do Brasil

et al. 2013

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Serra da Pedra Branca (SPB) is a mountain range located in the Southwestern portion of the state Minas Gerais, in the municipality of Caldas (21°58'-21°55'S, 46°24'-46°22'W). It is a striking feature in the landscape, between 1100 and 1780 m.s.m., in a region that is part of the Atlantic Forest Domain and is considered as a priority area for conservation of the flora in Minas Gerais state. The vegetation is composed by a mosaic of "campo de altitude" (which occupy the greatest extension in the area), Seasonal Semidecidual Montane Forest, Dense Ombrophilous High-Montane Forest and Mixed Ombrophilous Forest. The aims of this study was the elaboration of a floristic survey of SPB added to the specimens collected by Anders Fredrik Regnell in the nineteenth century in Caldas and to analyze its floristic similarity with altitude areas of the Southeastern Region of Brazil. There were recorded 502 vascular plant species, distributed in 274 genera and 100 families. The majority of recorded species present herbaceous habit, terricolous, saxicolous and/or rupicolous (representing around 58% of recorded species), predominantly occurring in the "campo de altitude" (ca. 46%). The richest families were Polypodiaceae (20 spp.) and Dryopteridaceae (10 spp.) among the ferns, and Orchidaceae (56 spp.), Asteraceae (27 spp.) and Fabaceae (26 spp.) among the angiosperms. Just one species of gymnosperm was recorded, Araucaria angustifolia (Bertol.) Kuntze (Araucariaceae). Five new records were made for the Minas Gerais flora, 13 species are cited as threatened with extinction in the state and at least six are endemic to SPB. Amongst 127 species collected in XIX century in the region, only 29 collected again, while 375 new records were made for SPB. The analysis of floristic similarity performed between the flora of SPB and other altitude areas of Southeastern Region revealed isolation of SPB in relation to other areas, highlighting its floristic peculiarity, which can probably be explained by its location in a distinct hydrographic basin. The vegetation of the SPB must be considered as endangered since the presence of endemic species and/or threatened species, associated with local environmental conditions suffering accelerated rate of destruction, highlight the need for urgent actions to preserve local biodiversity.

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Orchidaceae do Parque Estadual de Ibitipoca, MG, Brasil

Cited by 50 publications

References 14 publications

A família Eriocaulaceae no Parque Estadual do Ibitipoca, Minas Gerais, Brasil

A família Eriocaulaceae no Parque Estadual do Ibitipoca, Minas Gerais, Brasil

Quantas espécies de plantas vasculares existem em um hotspot local de biodiversidade no sudeste do Brasil?

Flora vascular da Serra da Pedra Branca, Caldas, Minas Gerais e relações florísticas com áreas de altitude da Região Sudeste do Brasil

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