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| Souza,P.F; Siqueira,T.C; Martins,R.L. |
| Neste trabalho é apresentada a composição florística e estrutural de ilhas de vegetação de um inselberg do Vale do Moxuara, localizado no município de Cariacica-Espírito Santo, onde avaliou-se a riqueza das ilhas de vegetação está relacionada com seu tamanho e com a profundidade do solo. Foram avaliadas 45 ilhas de vegetação para estimativa dos parâmetros fitossociológicos necessários às análises. Foram encontradas 53 espécies de plantas vasculares, pertencentes a 24 famílias e 48 gêneros. As famílias com maior representatividade foram Poaceae, com sete espécies, seguida de Asteraceae, Malvaceae e Fabaceae, com seis espécies cada. Plantas daninhas representaram 39,6% da flora inventariada e 25,5% da cobertura vegetal das ilhas. As espécies com maior... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Afloramentos rochosos; Inselbergs; Ilhas xéricas. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000400004 |
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| Gomes,Polyhanna; Alves,Marccus. |
| Floristic composition and structure of vegetation were studied in two rocky outcrop areas in the semi-arid region of northeastern Brazil. From April 2007 to September 2008, 18 monthly field trips were carried out. Vascular plants were randomly collected throughout the outcrop areas. For structural analysis, 30 plots of 1 × 1 m were set in the vegetation islands. The checklist presented combines 211 species (69 families and 168 genera), although only 56 species were collected in the plots. Fabaceae (18 spp.; 8.5%), Asteraceae (17 spp.; 8%), Orchidaceae (13 spp.; 6.1%), Euphorbiaceae (13 spp.; 6.1%), Bromeliaceae (10 spp.; 4.7%), and Poaceae (eight spp.; 3.8%) are the richest families. Overall, 1,792 shrub and herbaceous specimens were counted in the plots.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Inselbergs; Life-forms; Saxicolous plants. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000400014 |
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| Bicalho,Elisa Monteze; Soares-da-Mota,Letícia A.; Garcia,Queila Souza. |
| ABSTRACT Germination is the first step to successful plant establishment. The range of factors that promote germination varies among species. Light and temperature requirements for the germination of species of Velloziaceae were investigated. Seeds of Barbacenia flava, B. markgrafii, B. purpurea, B. williamsi, Vellozia alata, V. compacta, V. glochidea and V. plicata were collected from rocky outcrops located in different Brazilian states and were incubated for germination at 10 to 40 °C in light or dark conditions. Seed mass and length were measured for each species. In general, all species exhibited a high germination percentage at temperatures of 15-40 °C in the light, with the optimal temperature being 25-30 °C for species of Barbacenia and 30 °C for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Barbacenia; Darkness; Granitic outcrops; Inselbergs; Ironstone outcrops; Optimal temperature; Quarzitic outcrops; Vellozia. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200240 |
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| Silva,Joan Bruno; Sfair,Julia Caram; Santos,Nivea Dias dos; Pôrto,Kátia Cavalcanti. |
| ABSTRACT The species-area relationship (SAR) is one of the oldest and most studied ecological models, having even served as the foundation of the Theory 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Inselbergs; Island Biogeography; Microhabitat; Species area relationship. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200161 |
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