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| Torres,Davi Coe; Lima,João Paulo Matos Santos; Fernandes,Afrânio Gomes; Nunes,Edson Paula; Grangeiro,Thalles Barbosa. |
| Chamaecrista belongs to subtribe Cassiinae (Caesalpinioideae), and it comprises over 330 species, divided into six sections. The section Xerocalyx has been subjected to a profound taxonomic shuffling over the years. Therefore, we conducted a phylogenetic analysis using a cpDNA trnE-trnT intergenic spacer and nrDNA ITS/5.8S sequences from Cassiinae taxa, in an attempt to elucidate the relationships within this section from Chamaecrista. The tree topology was congruent between the two data sets studied in which the monophyly of the genus Chamaecrista was strongly supported. Our analyses reinforce that new sectional boundaries must be defined in the Chamaecrista genus, especially the inclusion of sections Caliciopsis and Xerocalyx in sect. Chamaecrista,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phylogeny; ITS/5.8S; Chamaecrista; Xerocalyx; TrnE-trnT intergenic spacer. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200014 |
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| Salgado,Eveline Viana; Salgado,Eveline Viana; Hevia,Joaquín Navarro; Nunes,Edson Paula; Rodrigues,Meilla Marielle de Araújo. |
| The present study was designed to investigate the dynamics of rainfall patterns on the production and rate of decomposition of litter in the caatinga biome. To this end, a data series which had been recorded over 30 years (1981-2010) was used; the indicators taken into consideration being the irregular rainfall index, humidity index and consecutive wet and dry days. Litter was collected monthly over a period of two years (2009-2010) at 20 different locations, and totalled 480 samples. Samples were taken from all live individuals with a stem diameter of >0.03 m and a height of >1 m: 562 individuals in 25 recorded species were identified. The annual irregular rainfall index, calculated from the series, was 8.45, with a maximum precipitation of 1,763.9... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rainfall indices; Droughts; Caatinga biome; Decomposition of litter. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200299 |
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