Consulta: creatorFacets:"Oliveira,Alexandre Adalardo de"
Registros recuperados: 4
Data/hora: 10/06/2024 18:28:29

Can plant DNA barcoding be implemented in species-rich tropical regions? A perspective from São Paulo State, Brazil
Provedor de dados: 74
Autores: Lima,Renato A. Ferreira de; Oliveira,Alexandre Adalardo de; Colletta,Gabriel Dalla; Flores,Thiago Bevilacqua; Coelho,Rubens L. Gayoso; Dias,Pedro; Frey,Gabriel Ponzoni; Iribar,Amaia; Rodrigues,Ricardo Ribeiro; Souza,Vinícius Castro; Chave,Jérôme.
Abstract DNA barcoding helps to identify species, especially when identification is based on parts of organisms or life stages such as seeds, pollen, wood, roots or juveniles. However, the implementation of this approach strongly depends on the existence of complete reference libraries of DNA sequences. If such a library is incomplete, DNA-based identification will be inefficient. Here, we assess if DNA barcoding can already be implemented in species-rich tropical regions. We focus on the tree flora of São Paulo state, Brazil, which contains more than 2000 tree species. Using new DNA sequence data and carefully assembled GenBank accessions, we assembled 12,113 sequences from ten different regions. The ITS, rbcL, psbA-trnH, matK and trnL regions were better...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity assessment; Plant barcoding; Species conservation; Tree species.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000400661

Structure, diversity, and spatial patterns in a permanent plot of a high Restinga forest in Southeastern Brazil
Provedor de dados: 39
Autores: Lima,Renato Augusto Ferreira de; Oliveira,Alexandre Adalardo de; Martini,Adriana Maria Zanforlin; Sampaio,Daniela; Souza,Vinícius Castro; Rodrigues,Ricardo Ribeiro.
We assessed the structure, diversity and distribution of tree species in a 10.24-ha permanent plot of high Restinga forest (HRF) in southeastern Brazil. We sampled 15,040 individuals belonging to 45 families, 87 genera and 116 species (density= 1,468 trees ha-1, and basal area= 28.0 m² ha-1). Mean richness was lower than other types of tropical forests and other HRFs that have been less intensively sampled, which is probably due to the younger age and hydromorphy of the soils in the study site. Tree density, basal area, species composition, and diversity all varied considerably depending on the size class considered. The studied plot had a density similar to other tropical forests but with a smaller basal area (fewer individuals &gt; 60 cm in diameter),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Forest; Multi-stemmed trees; Species richness; Tree size classes.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000300017

Community structure and species composition of a periodically flooded Restinga forest in Caraguatatuba, São Paulo, Brazil
Provedor de dados: 49
Autores: Pansonato,Marcelo Petratti; Lima,Renato Augusto Ferreira de; Oliveira,Alexandre Adalardo de; Bertoncello,Ricardo; Martini,Adriana Maria Zanforlin.
Abstract: The aim of this study was to characterize the structure and composition of the tree and shrub community in a 77-ha fragment of Restinga forest in Caraguatatuba, São Paulo, Brazil. In this fragment, forty 20 × 20-m plots (1.6 ha) were systematically allocated and all trees with a stem diameter at breast height (DBH) ≥4.8 cm were sampled. Sixteen plots were randomly chosen to also sample individuals with a DBH of between 1 and 4.8 cm. All individuals were tagged, identified to species level, and their diameters and heights were measured. A total of 2587 individuals (1616 ind./ha) from 119 species and 42 families were found with a DBH &gt;4.8 cm, and 2659 individuals (4154 ind./ha) from 125 species and 38 families were found with a DBH &gt;1 cm. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: White sandy soil; Coastal sandy forest; Waterlogging; Coastal plain vegetation; Atlantic Forest.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100303

Produção de serrapilheira e decomposição foliar em fragmentos florestais de diferentes fases sucessionais no Planalto Atlântico do estado de São Paulo, Brasil
Provedor de dados: 49
Autores: Vendrami,Juliana Lopes; Jurinitz,Cristiane Follmann; Castanho,Camila de Toledo; Lorenzo,Leda; Oliveira,Alexandre Adalardo de.
A produção e a decomposição de serrapilheira são processos vitais nas florestas tropicais, uma vez que determinam a ciclagem de nutrientes. O processo de ciclagem de nutrientes pode ser alterado pela fragmentação florestal. A Floresta Atlântica é um dos biomas mais ameaçados mundialmente devido à ocupação humana nos últimos 500 anos. Este cenário resultou em fragmentos de diferentes tamanhos, idades e estádios de regeneração. Para explorar as diferenças na produção de serrapilheira e na decomposição foliar de acordo com o estádio sucessional da floresta, comparamos seis fragmentos florestais em três diferentes estádios sucessionais e uma área de floresta primária no Planalto Atlântico de São Paulo, Brasil. Coletamos a serrapilheira mensalmente de novembro...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomassa; Ciclagem de nutrientes; Floresta secundária; Floresta tropical.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000300016