Diversidade em quatro áreas de campos rupestres na Chapada Diamantina, Bahia, Brasil: espécies distintas, mas riquezas similares

Conceição, Abel Augusto; Pirani, José Rubens

doi:10.1590/2175-7860200758114

Cited by 66 publications

(52 citation statements)

References 19 publications

(21 reference statements)

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“…Location of the study sites: "Morro da Mãe Inácia" (M), Fumaça (F), "Gerais da Fumaça" (GF) and Guiné (G) at "Chapada Diamantina", Bahia, Brazil. Adapted from Conceição & Pirani (2007) [pages Lençóis, Palmeiras, Seabra and Utinga of map SUDENE (1977) 1:100000].…”

Section: Methodsmentioning

confidence: 99%

Floristics, structure and soil of insular vegetation in four quartzite-sandstone outcrops of "Chapada Diamantina", Northeast Brazil

Conceição¹,

Pirani

Meirelles

2007

Rev. bras. Bot.

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-(Floristics, structure and soil of insular vegetation in four quartzite-sandstone outcrops of "Chapada Diamantina", Northeast Brazil). Soil islands on rocky surfaces often harbor aggregated vegetation that consists of insular plant communities. These islands are typical of the rocky outcrops and in various parts of Brazil form the so-called "campos rupestres" vegetation. Four of such sites have been selected in the state of Bahia, Northeast Brazil, for this comparative study on floristics and vegetation structure: three areas situated inside the "Parque Nacional da Chapada Diamantina" (Guiné, Fumaça and "Gerais da Fumaça") and one is at the border of the Environmental Protection Area of "Marimbus-Iraquara" ("Mãe Inácia"). All occurring vegetation islands were studied in four random plots of 10 × 10 m per site. Soil was often shallow, sandy and acidic. Vascular plant species were determined, with respective life forms and canopy coverage areas. The total number of species when all four sites were added was 135, and the number of species per island varied from 2 to 32. The areas of the 214 soil islands varied from 0.015 to 91.9 m 2 , totaling 568 m 2 in the four sites. Monocotyledon families were dominant, essentially Velloziaceae, as well as Orchidaceae, Bromeliaceae, Amaryllidaceae and Cyperaceae. Among the eudicotyledons, dominant families were mainly Clusiaceae, Asteraceae and Melastomataceae. The biological spectra revealed that phanerophytes and hemicryptophytes predominated among the life forms, while chamaephytes had the largest coverage area. Epilithic and desiccant chamaephytes composed the most conspicuous interspecific associations, and were probably related to early successional processes. Sites closest to one another were not the most similar in structure, indicating that other factors more relevant than distance might be involved in the abundance of species in space.Key words -floristics, rocky outcrops, soil islands on rocks, vegetation islands, vegetation structure RESUMO -(Florística, estrutura e solo da vegetação insular em quatro afloramentos de quartzito-arenito na Chapada Diamantina, nordeste do Brasil). Ilhas de solo abrigam comunidades vegetais agregadas no espaço e delimitadas pela superfície rochosa. Tais ilhas são típicas dos afloramentos rochosos de várias regiões brasileiras e, por vezes, integram parte da vegetação chamada de campo rupestre. Quatro sítios caracterizados por elevadas proporções de superfície rochosa foram selecionados para este estudo de florística e estrutura vegetacional: três situados dentro do Parque Nacional da Chapada Diamantina (Guiné, Fumaça e Gerais da Fumaça) e um no limite com a APA Marimbus-Iraquara (Mãe Inácia). Sortearam-se quatro parcelas de 10 × 10 m por sítio, onde todas as ilhas de solo ocorrentes tiveram suas áreas estimadas. O solo foi em geral raso, arenoso e ácido. Foram determinadas as espécies de plantas vasculares, com respectivas formas de vida e áreas de cobertura vegetal. O número de espécies nos quatro sítios foi 135, variando de ...

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Section: Methodsmentioning

confidence: 99%

Floristics, structure and soil of insular vegetation in four quartzite-sandstone outcrops of "Chapada Diamantina", Northeast Brazil

Conceição¹,

Pirani

Meirelles

2007

Rev. bras. Bot.

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“…Rocky outcrop cerrado areas have generally been described as having high numbers of habitat-specialist species among herbaceous-subshrub plants (Pirani et al 1994, Harley 1995, Romero & Martins 2002, Conceição & Pirani 2007 as well as in the tree-shrub layer (Simon & Proença 2000). The edaphic characteristics and climatic conditions of rupestral environments appear to favor the occurrence of rare, endemic, and habitat-specialist species (Pirani et al 1994, Romero & Nakajima 1999, Simon & Proença 2000.…”

Section: 85mentioning

confidence: 99%

Influence of edaphic variables on the floristic composition and structure of the tree-shrub vegetation in typical and rocky outcrop cerrado areas in Serra Negra, Goiás State, Brazil

et al. 2012

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Influence of edaphic variables on the floristic composition and structure of the tree-shrub vegetation in typical and rocky outcrop cerrado areas in Serra Negra, Goiás State, Brazil ABSTRACT -(Influence of edaphic variables on the floristic composition and structure of the tree-shrub vegetation in typical and rocky outcrop cerrado areas in Serra Negra, Goiás State, Brazil). The present study analyzed the influence of edaphic variables on the floristic compositions and structures of the arboreal and shrub vegetation of typical cerrado (TC) and rocky outcrop cerrado (RC) communities in the Serra Negra mountain range in Piranhas Municipality, Goiás State, Brazil. Ten 20 × 50 m plots were established in each community, and all individuals with minimum diameters ≥ 5 cm measured at 30 cm above soil level were sampled. Composite soil samples were collected at 0-20 cm depths in each plot for physical and chemical analyses. The proportions of above-ground rock cover work also estimated in each RC plot. A total of 2,009 individuals (83 species, 69 genera, and 34 families) were recorded. Qualea parviflora was the only species consistently among the 10 most structurally important taxa in both communities, and was considered a generalist species. The observed and estimated species richnesses were greater in RC than in TC, although plant basal areas and heights did not differ between them. There were positive correlations between rock cover × plant density and rock cover × basal areas. TWINSPAN and PCA analysis separated the TC and RC plots, and three RC habitat specialist species (Wunderlichia mirabilis, Norantea guianensis, and Tibouchina papyrus) were identified. Soil variables were found to have greater effects on the species compositions of the TC and RC sites than the geographic distances between sampling plots. According to CCA analysis, the exclusive (or more abundant species) of each community were correlated with soil variables, and these variables therefore determined the selection of some species and influenced the differentiation of the vegetation structures of the communities studied.

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“…Portanto, tendo em mente que a composição de espécies nos campos rupestres muda entre locais e habitats, mesmo que esses sejam muito próximos (Conceição & Giulietti 2002;Conceição & Pirani 2007) e que o aumento do esforço de coleta tem trazido constantes novidades taxonômicas para a Cadeia do Espinhaço (op .cit. ), torna-se relevante a proposição de inventários florísticos que podem responder positivamente ao aumento da diversidade da família na região, gerando informações úteis para a conservação desses ecossistemas.…”

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Asteraceae no Município de Mucugê, Chapada Diamantina, Bahia, Brasil

et al. 2016

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ResumoLevantamentos florísticos de Asteraceae na Cadeia do Espinhaço têm confirmado uma significante riqueza de espécies e de endemismos dessa família para as vegetações campestres. O presente trabalho tem como objetivo realizar um inventário florístico de Asteraceae no município de Mucugê, Bahia, oferecendo subsídios para o reconhecimento da família na região. As coletas têm sido realizadas na região há pelo menos uma década e meia cobrindo grande parte da área do Município. Foram estudados também os materiais provenientes dos herbários ALCB, CEPEC, HRB, HUEFS, MBM, NYBG, RB, SP, SPF e UB. A família Asteraceae está representada em Mucugê por 18 tribos, 78 gêneros e 167 espécies. As tribos com maior número de espécies são Eupatorieae (49 spp.), Vernonieae (46 spp.), Astereae (18 spp.) e Heliantheae (11 spp.). Dos gêneros registrados, cinco são monoespecíficos (Pseudostifftia, Platypodanthera, Bahianthus, Conocliniopsis e Prolobus) e cinco são endêmicos da Bahia (Pseudostifftia, Stylotrichium, Lasiolaena e Semiria). Dentre os gêneros com maior riqueza, destacam-se Baccharis (17 spp.), Lychnophora (11 spp.), Mikania (10 spp.), Lepidaploa e Lessingianthus (7 spp.) cada. São apresentadas chaves de identificação para as tribos, gêneros e espécies, comentários taxonômicos e distribuição geográfica para cada táxon, além de ilustrações e fotos. Palavras-chave: Cadeia do Espinhaço, campo rupestre, florística, endemismo. AbstractFloristic surveys of the Asteraceae in the Espinhaço Range have showed a significant species richness and endemisms in this family for the grassland vegetation. Thus, this study aims to survey the floristic inventory of the Asteraceae in the municipality of Mucugê, Bahia, providing subsidies for an updated taxonomic recognition of the family in the region. Field collections have been conducted for at least a decade and a half covering much of the area. We also analyzed the material from the herbaria ALCB, CEPEC, HRB, HUEFS, MBM, NYBG, RB, SP, SPF and UB. Asteraceae is represented in Mucugê by 18 tribes, 78 genera and 167 species. The tribes with the greatest number of species are Eupatorieae (49 spp.), Vernonieae (46 spp.), Astereae (18 spp.) and Heliantheae (11 spp.). Five of the genera are monospecific (Pseudostifftia, Platypodanthera, Bahianthus, Conocliniopsis e Prolobus) and five are endemic to Bahia (Pseudostifftia, Stylotrichium, Lasiolaena and Semiria). The genera with highest number of species are Baccharis (17 spp.), Lychnophora (11 spp.), Mikania (10 spp.), Lepidaploa and Lessingianthus (7 spp.) each. Identification keys to the tribes, genera and species, followed by taxonomic comments and geographic distribution for each taxon, and illustrations and images are presented.

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Diversidade em quatro áreas de campos rupestres na Chapada Diamantina, Bahia, Brasil: espécies distintas, mas riquezas similares

Cited by 66 publications

References 19 publications

Floristics, structure and soil of insular vegetation in four quartzite-sandstone outcrops of "Chapada Diamantina", Northeast Brazil

Floristics, structure and soil of insular vegetation in four quartzite-sandstone outcrops of "Chapada Diamantina", Northeast Brazil

Influence of edaphic variables on the floristic composition and structure of the tree-shrub vegetation in typical and rocky outcrop cerrado areas in Serra Negra, Goiás State, Brazil

Asteraceae no Município de Mucugê, Chapada Diamantina, Bahia, Brasil

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