Abstract:RESUMO A Reserva Biológica da Represa do Grama está localizada no município de Descoberto, Zona da Mata do estado de Minas Gerais. A Reserva abrange uma área de 263,8 hectares com a predominância de florestas estacionais semideciduais baixo-montanas. Apocynaceae s.l. está representada na área por 12 espécies, distribuídas nos gêneros Asclepias, Aspidosperma, Condylocarpon, Ditassa, Forsteronia, Himatanthus, Macroditassa, Matelea, Rauvolfia, Secondatia e Tabernaemontana. Neste trabalho, são fornecidos chaves de… Show more
“…It is further worth mentioning that several new species were found in this region in the last two decades (Sommer & Ferrucci 2004;Lobão et al 2006;Sobral & Couto 2006;Fraga & Aymard 2007;Sobral et al 2012), with new distribution records (Menini Neto et al 2004;Almeida et al 2005;Matozinhos & Konno 2008;Versieux & Wendt 2006), and rare species for Minas Gerais state (Forzza et al 2014), also harboring Besleria brevicalyx G.E.Ferreira & Chautems (Gesneriaceae) (Ferreira et al 2016), endemic to the SR. Considering that 80% of the Atlantic Forest remnants have less than 50 ha (Ribeiro et al 2009), fragments having this extension can be considered rare and deserve attention.…”
Section: Resultsmentioning
confidence: 95%
“…Although the Serra do Relógio is recognized as important for biodiversity conservation and has floristic studies about families (Menini Neto et al 2004;Almeida et al 2005;Lobão et al 2006;Matozinhos & Konno 2008;Pereira et al 2021) and general flora of the RBRG (Forzza et al 2014), no one specific study about epiphytic flora was performed to date.…”
Studies conducted on vascular epiphytes in Minas Gerais have revealed high richness in the seasonal semi-deciduous forests (SSF) in comparison with those of other Brazilian states. This study aimed to present a vascular epiphyte checklist of the Serra do Relógio (SR) in the Atlantic Forest of Minas Gerais, in order to analyze the similarity between two areas in different altitudes, as well as to discuss the high richness recorded for this synusia in the SSFs of this state. The survey was performed in two conservation units (CUs) apart from each other approximately 6 km and with elevations varying between ~500 and 1,434 m. The data were obtained from published articles and fieldwork performed between the years 2016 and 2019. We recorded 158 species distributed in 76 genera and 22 families. This richness is greater than those found in some ombrophilous forests, which was an unexpected result due to the high moisture of this phytophysionomy. Although approximately 66% of the species found in the SR are anemochoric and the compared CUs are geographically close, the similarity was only 22%, suggesting that the difference in altitude between the areas and the history of use can impose filters that influence the floristic composition of each one area. These results highlight the importance of preserving the forest remnants in Brazil and creating and maintain CUs to protect them.
“…It is further worth mentioning that several new species were found in this region in the last two decades (Sommer & Ferrucci 2004;Lobão et al 2006;Sobral & Couto 2006;Fraga & Aymard 2007;Sobral et al 2012), with new distribution records (Menini Neto et al 2004;Almeida et al 2005;Matozinhos & Konno 2008;Versieux & Wendt 2006), and rare species for Minas Gerais state (Forzza et al 2014), also harboring Besleria brevicalyx G.E.Ferreira & Chautems (Gesneriaceae) (Ferreira et al 2016), endemic to the SR. Considering that 80% of the Atlantic Forest remnants have less than 50 ha (Ribeiro et al 2009), fragments having this extension can be considered rare and deserve attention.…”
Section: Resultsmentioning
confidence: 95%
“…Although the Serra do Relógio is recognized as important for biodiversity conservation and has floristic studies about families (Menini Neto et al 2004;Almeida et al 2005;Lobão et al 2006;Matozinhos & Konno 2008;Pereira et al 2021) and general flora of the RBRG (Forzza et al 2014), no one specific study about epiphytic flora was performed to date.…”
Studies conducted on vascular epiphytes in Minas Gerais have revealed high richness in the seasonal semi-deciduous forests (SSF) in comparison with those of other Brazilian states. This study aimed to present a vascular epiphyte checklist of the Serra do Relógio (SR) in the Atlantic Forest of Minas Gerais, in order to analyze the similarity between two areas in different altitudes, as well as to discuss the high richness recorded for this synusia in the SSFs of this state. The survey was performed in two conservation units (CUs) apart from each other approximately 6 km and with elevations varying between ~500 and 1,434 m. The data were obtained from published articles and fieldwork performed between the years 2016 and 2019. We recorded 158 species distributed in 76 genera and 22 families. This richness is greater than those found in some ombrophilous forests, which was an unexpected result due to the high moisture of this phytophysionomy. Although approximately 66% of the species found in the SR are anemochoric and the compared CUs are geographically close, the similarity was only 22%, suggesting that the difference in altitude between the areas and the history of use can impose filters that influence the floristic composition of each one area. These results highlight the importance of preserving the forest remnants in Brazil and creating and maintain CUs to protect them.
“…A família possui uma grande diversidade de frutos podendo variar de folicários (termo utilizado por Spjut (1994) para os frutos de Asclepiadaceae e Apocynaceae, derivados de um gineceu esquizocárpico com ovários unidos somente por estiletes ou estigmas), secos ou carnosos, cápsulas, moniliformes, drupas e bagas. As sementes também apresentam variaçnao, podendo ser nuas, aladas, comosas ou ariladas (Matozinhos & Konno 2008). Geralmente os frutos são gêmeos ou solitários pelo aborto de um dos carpelos, com variação morfológica entre as espécies (Gomes 2008).…”
Resumo Este estudo apresenta um tratamento das espécies de Apocynaceae registradas nas cangas da Serra dos Carajás, Pará. São apresentadas descrições detalhadas, chaves para identificação dos gêneros e espécies, ilustrações, dados sobre distribuição geográfica e comentários morfológicos e ecológicos das espécies tratadas. Foram registradas 22 espécies e 13 gêneros na área de estudo. Destacam-se as espécies de Marsdenia bergii e Matelea microphylla, endêmica das cangas da Serra dos Carajás, e Marsdenia thomasii, com apenas duas coletas, uma para o estado do Mato Grosso e a outra para a região de Carajás.
“…Dados ecológicos: Liana ampla distribuição por toda a América do Sul (Barth & Luz, 2008;Matozinhos & Konno, 2008;Rezende et al, 2007) Aquifoliaceae Bartling Tipo Ilex L. (Figura 3 h-i) Grão de pólen em mônade, tamanho médio, isopolar, simetria radial, âmbito subtriangular, suboblato a subprolato, tricolporado, endoabertura pouco evidenciada, superfície pilada com os pilos diminuindo de tamanho em direção aos colpos.…”
ResumoO trabalho tem como objetivo identificar e descrever a morfologia de tipos polínicos ocorrentes nos sedimentos superficiais da Baía de Guanabara, Rio de Janeiro, Brasil. A análise palinológica possibilitou identificar 91 tipos polínicos, sendo 5 de gimnospermas e 86 de angiospermas. Com base nos dados polínicos e ecológicos obtidos neste trabalho será possível contribuir para o reconhecimento das formações vegetais e a caracterização da vegetação ao longo do Holoceno. Palavras chave: Holoceno; Baía de Guanabara; Palinologia
AbstractThe study presents the description and identification of pollen grains obtained in the top sediments of Guanabara Bay, Rio de Janeiro, Brazil. Pollen analysis enabled to identify 91 pollen types, with five of gymnosperms and 86 of angiosperms. The pollen and the ecological data obtained in the present work will contribute to the recognition of the vegetal formations and the characterization of the vegetation throughout the Holocene.
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