Estrutura e florística do estrato arbóreo no cerrado sensu stricto de Buritis, Minas Gerais, Brasil

Nettesheim, Felipe Cito; Carvalho, Daniel Costa de; Fonseca, Clarisse Cavalcanti da; Nunes, Renato Silva; Cavalcanti, Daniel Moreira; Gabriel, Monique Medeiros; Menezes, Luis Fernando Tavares de

doi:10.1590/2175-7860201061413

Cited by 17 publications

(16 citation statements)

References 17 publications

(51 reference statements)

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“…Although broader inclusion criteria may lead to an increase in this variable (Nettesheim et al, 2010), these two studies with the highest values used the same criteria, not as restrictive as other studies in Rio de Janeiro. The total density was 1872 individuals/ha, a relatively high value when compared to that found in other studies in the State of Rio de Janeiro, but lower than those found by Gandra et al (2011) in PRNP Porangaba (1886 ind/ha) and by Kurtz et al (2009) on a sandbank of Buzios (2386 ind/ha).…”

Section: Discussionmentioning

confidence: 99%

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil

et al. 2015

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The State of Rio de Janeiro still holds unknown portions of the Atlantic Forest, which represent gaps in the knowledge of this ecosystem. Paracambi and neighbor municipal districts comprise a vast stretch of virtually unknown forest that makes up part of the Serra do Mar biodiversity corridor. The following study describes the tree community structure in a stretch of the ombrophilous Atlantic Forest, in the Parque Natural Municipal do Curió (Curio MNP), Paracambi, Rio de Janeiro, which serves as the basis to evaluate species diversity and conservation status. The altitudes in the area ranges from 100 to 690 m and the climate varies from mild subtropical to tropical hot and humid. Forty plots (10x10m) were randomly placed along the area, where all the stems equal to or greater than five centimeters (5 cm) diameter at breast high from ground level were measured. A total of 749 individuals, pertaining to 128 genera and 210 species were recorded, eight of which are listed as threatened of extinction in the Brazilian flora. The Shannon-Weaver diversity index (H′) was 4.7 nat.ind.-1 and the species with greater importance value was Pseudopiptadenia contorta (1.6460 m2; 18 individuals) while the most common species wereSenefeldera vertcilata (48) and Actinostemon verticilatus (47 individuals). Despite the sample area being a little smaller than that commonly adopted in tropical studies, data pointed to a richness hitherto not registered in any other study for the State of Rio de Janeiro, no matter the inclusion criteria used, and also confirmed by the two estimator indices used, which have revealed very similar results. The vertical forest structure, the values associated to the successional stage of the species and other aspects of community structure indicate that the Curio MNP encompasses forest stretches in advanced stages of ecological succession. Besides its key location for the connectivity of forest fragments in the region, the results emphasize the ecological importance of this forest remnant and the need for its conservation.

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Section: Discussionmentioning

confidence: 99%

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil

et al. 2015

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“…O parênquima paliçádico também apresentou médias 29,55% maiores nas plantas de cerrado enquanto que o parênquima esponjoso demonstrou valores 18,55% superiores nas plantas coletadas nesse ambiente em comparação ao campo rupestre (Tabela 1). O ambiente de campo rupestre é tipicamente caracterizado por vegetação rasteira e ambientes abertos (ALVES et al, 2014) enquanto o cerrado sensu stricto pode conter vegetação arbórea abundante representada por diversas famílias botânicas (NETTESHEIM et al, 2010). O ambiente de campo rupestre possui solos particularmente pobres e um período seco bastante característico (ALVES et al, 2014).…”

Section: Anatomia Quantitativa Da Folhaunclassified

Micromorfometria Foliar De Palicourea Rigida Kunth. (Rubiaceae) Em Ambiente De Cerrado E Campo Rupestre

Gavilanes

Castro

Pires

et al. 2016

CERNE

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MICROMORFOMETRIA FOLIAR DE PALICOUREA RIGIDA KUNTH. (RUBIACEAE) EM AMBIENTE DE CERRADO E CAMPO RUPESTRERESUMO: Este trabalho teve como objetivo um estudo anatômico descritivo e quantitativo da estrutura foliar de Palicourea rigida Kunth. (Rubiaceae), espécie que ocorre em áreas de cerrado e campo rupestre. As observações anatômicas foram realizadas em folhas de material fresco ou fixado, tratadas segundo metodologias usuais em anatomia vegetal. Foram observadas as seguintes características: epidermes do pecíolo e da lâmina foliar uniestratificadas; presença de tricomas tectores, simples, unisseriados, próximos, ou sobre as nervuras; estômatos do tipo paracítico presentes somente na face abaxial da folha; mesofilo com parênquima paliçádico de uma só camada de células; parênquima esponjoso com sete a nove camadas celulares com formas irregulares e tamanhos variados; idioblastos cristalíferos, observados em todos os parênquimas do pecíolo e lâmina foliar; feixes vasculares, do tipo colateral; colênquima observado, subepidermicamente, no pecíolo e nervuras de maior porte, em ambas faces; o padrão geral de nervação da espécie é pinado, camptódromo, broquidódromo. As análises micromorfométricas revelaram diferenças significativas em todos os itens analisados, sendo as médias mais elevadas encontradas nas folhas das plantas crescendo no cerrado. Isto sugere que a influência de fatores ambientais pode ter modulado respostas morfológicas nas plantas, visto que o tipo e distribuição dos tecidos não sofreram alterações nos dois ambientes. LEAF MICROMOPHOMETRY OF PALICOUREA RIGIDA KUNTH. (RUBIACEAE) FROM BRAZILIAN CERRADO AND CAMPO RUPESTRE ENVIRONMENTSABSTRACT: The objective of this work was to evaluate qualitative and quantitative leaf anatomical traits of Palicourea rigida Kunth. (Rubiaceae) species occurring in the Brazilian Cerrado and Campo Rupestre ecosystems. Anatomical analysis was performed in fresh or fixed leaves processed with usual plant microtechnique. Leaves showed uniseriate epidermis in petiole and leaf blade which contains uniseriate nonglandular tricomes (tector type) occurring only over the vascular bundles. Likewise, paracytic stomata were found only in abaxial side of the leaf surface. The mesophyll contains uniseriate palisade parenchyma and multiseriate spongy parenchyma (nine layers) which showed cells with different morphology and size. Crystal idoblasts of different types were observed in both the petiole and leaf blade. Collateral vascular bundles were found both in the petiole and leaf blade. Leaf venation type was pinnate, campylodromous or brochydodromous. The micromorphometric analysis showed significant differences from plants of different environments for all leaf characteristics and Cerrado plants showed higher means for all evaluated traits. Therefore, the influence of environments may had modulated morphological responses in P. rigida, since no difference was found in the type or distribution of leaf tissues in Cerrado or Campo Rupestre.

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“…Oliveira Filho et al 2002;Assunção & Felfili 2004;Felfili et al 2004;Fonseca & Silva Júnior 2004;Balduino et al 2005, Nettesheim et al 2010; fitogeografia (Oliveira-Filho & Ratter 2002;Siqueira & Durigan 2007); estimativas de biomassa e estoque de carbono (Barbosa & Fearnside 2004, Rezende et al 2006, Ribeiro et al 2011; estratégias de conservação da biodiversidade (Durigan et al 2006); adaptações das plantas às condições dos solos de Cerrado (Araújo & Haridasan 1988;Haridasan 2008); fenologia e ecologia reprodutiva (Gottsberger & SilbebauerGottsberger 2006;Morellato et al 2013). No entanto, trabalhos que investiguem a influência de borda no Cerrado são praticamente inexistentes (Lima-Ribeiro 2008, Jardim & Batalha 2009Camargo et al 2011), embora o conhecimento florístico e estrutural da vegetação, bem como a avaliação da influência de borda sejam fundamentais para sua conservação e futuras propostas de manejo e recuperação dos remanescentes do Cerrado.…”

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Estrutura e composição florística de um Cerrado sensu stricto e sua importância para propostas de restauração ecológica

Reys

Camargo

Grombone-Guaratini

et al. 2013

Hoehnea

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-(Structure and floristic composition of a Cerrado sensu stricto and its relevance to ecological restauration). Edges are transition areas between two adjacent ecosystems that can be originated by natural or anthropogenic events. The edge influence includes both direct effects, related to changes on microenvironmental factors, as well as indirect effects, related to changes in species interactions. Additionally, some studies suggest that microenvironmental factors are altered by the cardinal orientation of the edge. The present study aimed to evaluate the influence of edge on microenvironmental factors, local soil conditions, woody vegetation structure, and species richness in a Cerrado sensu stricto at Itirapina, São Paulo State, Brazil. Specifically, we investigated whether microenvironmental factors (relative humidity (%), photosynthetic active radiation (PAR), temperature and percentage of canopy cover), soil conditions and vegetation composition differ among plots (36 plots of 25 × 2 m spaced 50 m apart) distributed on the edge and in the interior, facing east and south sides of the Cerrado. We sampled all woody trees and treelets with circumference ≥ 3 cm at 30 cm from its ground base within each plot. The microenvironmental variables relative humidity, PAR (photosynthetic active radiation), temperature and percent of canopy openness, and the soil samples (0-20 cm deep) for nutrients and texture analyses, were all collected at three points within each plot. We recorded a total of 120 woody species distributed among 40 plant families. Among the structural parameters of vegetation, only the absolute density was significantly higher in the interior south of the Cerrado. The microenvironmental factors were significantly different between the east and south sides, but did not differ between edge and interior. Therefore, based on the environmental and structural parameters we evaluated, there was no evidence of edge influence in the Cerrado studied. However, the east and south faces and associated microenvironmental factors, and the presence of some nutrients in the soil, such as Mn, affected the Cerrado vegetation structure and species composition. Our results highlight the importance of taking into account the cardinal orientation in addition to the soil nutrient and microenvironment parameters to better understand the factors influencing the vegetation at a local scale. Key words: diversity, edge influence, microclimate, savanna, similarity, species richness RESUMO -(Estrutura e composição florística de um Cerrado sensu stricto e sua importância para propostas de restauração ecológica). Bordas são áreas de transição entre dois ecossistemas e podem ter origem natural ou antrópica. A influência de borda inclui tanto os efeitos diretos, relacionados às alterações microambientais, como os efeitos indiretos que afetam as interações entre espécies. Adicionalmente, estudos sugerem que a orientação cardinal pode modificar os efeitos microambientais da borda. O objetivo deste estudo foi avaliar a influência d...

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Estrutura e florística do estrato arbóreo no cerrado sensu stricto de Buritis, Minas Gerais, Brasil

Cited by 17 publications

References 17 publications

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil

Micromorfometria Foliar De Palicourea Rigida Kunth. (Rubiaceae) Em Ambiente De Cerrado E Campo Rupestre

Estrutura e composição florística de um Cerrado sensu stricto e sua importância para propostas de restauração ecológica

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