Ilhas de vegetação em afloramentos de quartzito-arenito no Morro do Pai Inácio, Chapada Diamantina, Bahia, Brasil

Conceição, Abel Augusto; Giulietti, Ana María; Meirelles, Sérgio Tadeu

doi:10.1590/s0102-33062007000200008

Cited by 47 publications

(44 citation statements)

References 27 publications

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“…In this manner, rocky habitat types were classified into two major groups: islands of herbaceous vegetation (Iv; Figures 3 and 4) corresponding to groups of "bushy" plants formed by one or more vascular species distributed directly over a rocky surface, with shallow soil delimited by a rocky surface (Conceição et al 2007); and woody thicket (Tw; Figure 5) corresponding to woody rupicolous communities with occurrence of arboreal and shrubby elements growing directly on the rocky surface, without forming stratification.…”

Section: Universal Transverse Mercator Projectionmentioning

confidence: 99%

Floristic composition of a Neotropical inselberg from Espírito Santo state, Brazil: an important area for conservation

Couto¹,

Francisco²,

Manhães³

et al. 2017

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Our study on granitic and gneissic rock outcrops on Pedra dos Pontões in Espírito Santo state contributes to the knowledge of the vascular flora of inselbergs in southeastern Brazil. We registered 211 species distributed among 51 families and 130 genera. Orchidaceae, Bromeliaceae and Polypodiaceae were the most representative families. Concerning vegetative habit, herbs were predominant and about the preference for substrates, holorupicolous species and epiphytes were most speciose. The richest rocky habitat type was woody thicket, with 122 exclusive species. In total, 27 of the species registered in our study are cited on official lists of endangered plant species from Espírito Santo state and Brazil. In addition, two new records of angiosperms for Espírito Santo flora and two new species were recorded for the area. Our data demonstrates the importance of the area for conservation of unique biodiversity that serves as a sanctuary for a rich rupicolous flora composed of endemic and endangered species, some of which are new to science.

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Section: Universal Transverse Mercator Projectionmentioning

confidence: 99%

Floristic composition of a Neotropical inselberg from Espírito Santo state, Brazil: an important area for conservation

Couto¹,

Francisco²,

Manhães³

et al. 2017

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“…Além disso, o substrato presente nas fendas apresenta grande variação de temperatura (Conceição et al 2007, Oliveira & Godoy 2007, dificultando ainda mais o estabelecimento de um número maior de espécies, por ter que se adaptar ao microclima seletivo (Cervi et al 2007).…”

Section: Discussionunclassified

Florística e fitossociologia em três diferentes fitofisionomias campestres no Sul do Brasil

Silva

Andrade

Velazco

et al. 2016

Hoehnea

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-(Floristic and phytosociology of three different grassland physiognomies of Southern Brazil). The purpose of this study was to evaluate the composition and structure of three different types of grassland vegetation of Southern Brazil. We aimed to discuss the floristic similarities among these areas and the influence of the Cerrado flora in their composition. Thirty plots of 1 × 1 m were placed in each area for the quantitative sampling. Additionally, species that occurred around the plots were also collected. In total, 283 species were sampled, with 163 species in CS, 87 species in CU, and 59 in CR. 36.48% (85) of the species sampled in this study also occur in the Cerrado. The cluster analysis showed that the floristic composition of the three grassland areas is significantly different due to several factors, especially the soil water system. Keywords: Campos Gerais, community structure, grassland, Paraná State, Southern Brazil Das espécies identificadas em nível específico,36,48% (85) foram citadas para áreas de Cerrado da região. As análises de agrupamento apontaram que as composições florísticas das três formações campestres são significativamente distintas entre si, isto se deve a diversos fatores, especialmente em relação ao regime hídrico do solo. Palavras-chave: Campos Gerais do Paraná, campos sulinos, estrutura de comunidade, vegetação campestre RESUMO -(Florística e fitossociologia em três diferentes fitofisionomias campestres no Sul do Brasil

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“…Soil islands are considered soil agglomerations larger than 10 cm² in size, regardless of the presence of vascular plants (concept modified from Conceição et al 2007), and surrounded by a rocky matrix. We selected 15 to 20 soil islands on each rocky outcrop that were colonized by bryophytes, for a total of 59 soil islands.…”

Section: Sampling Designmentioning

confidence: 99%

“…Soil islands on rocky outcrops can harbor considerable plant diversity (Conceição et al 2007;Silva et al 2014). Each rocky outcrop can harbor hundreds of soil islands (Conceição et al 2007) in which the number of colonizing plant species depends on many factors, such as island size and the depth of its soil. For instance, deeper soil islands can maintain more robust vascular plant species than shallower soil islands (Scarano 2002) due to greater moisture and space for root growth.…”

Section: Introductionmentioning

confidence: 99%

Bryophyte richness of soil islands on rocky outcrops is not driven by island size or habitat heterogeneity

et al. 2018

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Th e species-area relationship (SAR) is one of the oldest and most studied ecological models, having even served as the foundation of the Th eory of Island Biogeography. Nevertheless, the relative importance of habitat heterogeneity to SAR remains poorly understood. Our aim was to test the relative importance of habitat heterogeneity to the SAR of bryophyte assemblages of soil islands of rocky outcrops in the semi-arid region of Brazil. We randomly selected 15 to 20 soil islands on each of four outcrops for a total of 59 soil islands, and calculated the area, mean depth, and number of substrates for each. We used Generalized Linear Models (GLM) to test the SAR with two models, one using species richness and another using life-form richness as the dependent variables. We found no positive relationship between area and habitat heterogeneity, nor any evidence of a SAR, such as a positive relationship between area and species or life-form richness neither between habitat heterogeneity and species richness. However, our fi ndings did show that life-form richness is related to bryophyte species richness on the soil islands. We conclude by suggesting that not only can microclimate infl uence bryophyte richness, but opportunistic colonization by bryophytes is also important.

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Ilhas de vegetação em afloramentos de quartzito-arenito no Morro do Pai Inácio, Chapada Diamantina, Bahia, Brasil

Cited by 47 publications

References 27 publications

Floristic composition of a Neotropical inselberg from Espírito Santo state, Brazil: an important area for conservation

Floristic composition of a Neotropical inselberg from Espírito Santo state, Brazil: an important area for conservation

Florística e fitossociologia em três diferentes fitofisionomias campestres no Sul do Brasil

Bryophyte richness of soil islands on rocky outcrops is not driven by island size or habitat heterogeneity

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