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| Silva,Joan Bruno; Germano,Shirley Rangel. |
| In the state of Paraíba, Brazil, there is an abundance of rocky outcrops, which are typical elements of the semi-arid landscape. Those outcrops provide refuge to species with morphological adaptations to stressful climates and to rare communities of plants, including bryophytes. Nevertheless, there have been no studies of bryophytes in such habitats in the state. Therefore, this work aimed to inventory bryophytes on two outcrops in the municipality of Puxinanã, in Paraíba, addressing some of the ecological aspects of survival in xerophytic environments. Samples were collected once every two weeks from February 2010 to May 2011. The usual techniques of bryophyte sampling and herbarium preservation were employed. We recorded 21 bryophyte species (six... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bryophyte; Inselberg; Morphological adaptations; Nonvascular flora; Semi-arid; Northeastern Brazil. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400023 |
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| Conceição,Abel Augusto; Giulietti,Ana Maria; Meirelles,Sérgio Tadeu. |
| Ilhas de vegetação rodeadas de superfície rochosa foram estudadas em dois platôs do Morro do Pai Inácio (41°28'W e 12°27'S), na Chapada Diamantina. Tais platôs possuem afloramentos de quartzito-arenito entremeados por solos arenosos e ácidos, situados nas porções mais elevadas do Morro, entre 1.100 e 1.170 m acima do nível do mar, sob clima com estação seca bem definida. As ilhas foram assumidas como agrupamentos de uma ou mais espécies de plantas vasculares limitados pela superfície rochosa sem plantas vasculares em toda borda. O estudo incluiu 39 ilhas de vegetação de diferentes tamanhos em cada platô, onde predominaram ervas e arbustos de 63 espécies, sendo 22 comuns a ambos os platôs. Espécies de Liliopsida foram mais numerosas, freqüentes e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campo rupestre; Fitossociologia; Afloramento rochoso; Inselberg; Ilha de vegetação. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000200008 |
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| MOSTACEDO,Bonifacio; TOLEDO,Marisol; FREDERICKSEN,Todd S.. |
| Estudiamos la riqueza y composición de especies vegetales en tres afloramientos rocosos (lajas) en Lomerío, Santa Cruz, Bolivia, dentro de un bosque seco tropical. Determinamos la variación de la vegetación desde el centro hacia el borde de las lajas, además que caracterizamos algunas especies propias de este hábitat. La riqueza de especies varía entre lajas, pero, en forma conjunta esta riqueza puede ser mayor a otros tipos de bosque aledaños a las lajas. La riqueza de especies fue mayor en el borde que en el centro de las lajas. En el borde de las lajas, la riqueza de especies varia según la distancia al centro de las lajas; la mayor riqueza se encontró en los primeros 10 m del borde. En el centro de las lajas Deuterocohnia meziana Kuntze ex Mez fue la... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversidad florística; Laja; Inselberg; Bolivia; Bosque tropical seco. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672001000100011 |
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| Gröger,Andreas; Huber,Otto. |
| The Guayana Shield, located in north-eastern South America, consists of a highly complex and composite mosaic of landscape elements. Amongst these, inselbergs are very conspicuous, because of their peculiar shape and their unusual associated vegetation. Geologically, these rock outcrops are part of the underlying ancient igneous-metamorphic basement and occur mainly in the lowlands of the periphery of the shield. As azonal habitats, inselbergs harbour a highly specialized flora. The characteristic vegetation is composed of lithophytic and savanna-like plant communities, as well as low dry forests. As a whole, the vegetation of an inselberg may be interpreted as a mosaic of marginal habitats. Therefore a large number of taxa find suitable niches in a quite... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endemism; Flora; Guayana Shield; Inselberg; Phytogeography; Venezuela. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000400006 |
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| Menini Neto,Luiz; Forzza,Rafaela Campostrini; van den Berg,Cassio. |
| Pseudolaelia is a genus endemic to eastern Brazil. The species are often epiphytes on Velloziaceae or are saxicolous, predominantly on granitic and gneissic outcrops (inselbergs) in the Atlantic Forest and, less often, in the campos rupestres (dry, rocky grasslands) of the cerrado (savanna) and caatinga (shrublands). The genus is characterized by homoblastic pseudobulbs, long rhizomes, long and usually slender inflorescences, racemes or panicles, bearing pink, yellow or whitish flowers, labellum often 3-lobed, with simple, fimbriate or erose margin, semi-cylindrical or claviform column, cuniculus present. Twelve species are recognized; seven binomials are placed in synonymy. Of those seven, three are considered illegitimate because, contrary to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eastern Brazil; Campo rupestre; Conservation; Inselberg; Taxonomy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200015 |
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