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| Ferreira,Paulo Sérgio Monteiro; Lopes,Sérgio de Faria; Trovão,Dilma Maria de Brito Melo. |
| ABSTRACT This study examines the variation in cacti species richness and abundance among sites with different average rainfall and soil types. We assessed a total of 3,660 individuals of six species of Cactaceae: Cereus jamacaru, Melocactus zehntneri, Pilosocereus gounellei, Pilosocereus pachycladus, Tacinga inamoena, and Tacinga palmadora. The greatest species richness and abundance of cacti were at locations with low rainfall and more clayey soils. The species studied differed in multidimensional representation, with some species being more positively related to soils with a higher proportion of fine particles (M. zehntneri and P. gounellei), while others were negatively related to soils with a higher proportion of coarser particles (T. inamoena) or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Cactaceae; Environmental gradients; Semiarid region; Soil granulometry. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000400569 |
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| Lopes,Sérgio de Faria; Schiavini,Ivan. |
| O estudo foi realizado em duas áreas de uma comunidade arbórea de mata de galeria na Estação Ecológica do Panga, Uberlândia, MG, com o objetivo de analisar as mudanças ocorridas no estrato arbóreo no intervalo de 13 anos (1989-2002). Utilizou-se amostras em 30 parcelas de 10×10 m em cada área, com registro de medidas de todos os indivíduos vivos com DAP > 4,8 cm. Para área 01, o levantamento em 1989 (T1) registrou 47 espécies e 501 indivíduos. O segundo levantamento (T2), apresentou 50 espécies e 444 indivíduos. A perda em área basal (2,6 m²) não superou o crescimento dos sobreviventes (2,38 m²) e o acréscimo promovido pelo recrutamento (0,57 m²). Para a área 02, encontrou-se 54 espécies e 324 indivíduos no T1 e 52 espécies e 260 indivíduos no T2. A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floresta tropical; Comunidade arbórea; Crescimento; Diversidade. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000200001 |
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| Ribeiro,João Everthon da Silva; Barbosa,Ana Jéssica Soares; Lopes,Sérgio de Faria; Pereira,Walter Esfrain; Albuquerque,Manoel Bandeira de. |
| ABSTRACT Erythroxylum simonisis an understory species found in Northeast Brazil. Due to its shaded habitat,E. simonisis subjected to seasonal oscillations of the environment, to which it must respond ecophysiologically. The objective of this study was to evaluate the effects of seasonality on the ecophysiology ofE. simonis in a fragment of Seasonal Semideciduous Forest. Leaf area index, visible sky fraction and photosynthetically active radiation were measured for 10 individuals during the dry and rainy seasons. Soil moisture, temperature and monthly precipitation were measured, as well as photosynthetic rate, stomatal conductance, internal CO2concentration, transpiration, instantaneous water use efficiency, instantaneous carboxylation efficiency and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Responses; Photosynthetic rate; Seasonal changes; Seasonal Semideciduous Forest; Understory. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200287 |
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| Oliveira,Ana Paula de; Schiavini,Ivan; Vale,Vagner Santiago do; Lopes,Sérgio de Faria; Arantes,Carolina de Silvério; Gusson,André Eduardo; Júnior,Jamir Afonso Prado; Dias-Neto,Olavo Custódio. |
| The area evaluated in this study was a continuous stretch comprising three vegetation formations: gallery forest, semideciduous seasonal forest and cerradão (woodland savanna). The aim of this study was to examine the tree community dynamics in a forest gradient-from gallery forest to cerradão-at Panga Ecological Station, in the city of Uberlandia, located in the state of Minas Gerais, Brazil. The study was based on data from a previous inventory of the continuous forest conducted in 211 permanent 10 × 10 m sample plots in eight parallel transect running perpendicular to Panga Creek. Trees with a diameter at breast height > 4.77 cm were sampled in 1997, 2002 and 2007. With the exception of the cerradão, there was a net reduction in tree density over the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest dynamics; Gallery forest; Semideciduous seasonal forest; Woodland savanna; Savanna. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000200010 |
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