Data/hora: 14/06/2024 01:15:38

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 21/01/2014
Data da última atualização: | 28/01/2015
Autoria: | TAKETANI, R. G.; LIMA, A. B.; JESUS, E. da C.; TEIXEIRA, W. G.; TIEDJE, J. M.; TSAI, S. M.
Título: | Bacterial community composition of anthropogenic biochar and Amazonian anthrosols assessed by 16S rRNA gene 454 pyrosequencing.
Ano de publicação: | 2013
Fonte/Imprenta: | Antonie van Leeuwenhoek, jun., 2013.
ISSN: | 1572-9699
DOI: | 10.1007/s10482-013-9942-0
Idioma: | Português
Conteúdo: | Biochar (BC)is a commonminor constituent of soils and is usually derived from the burning of wood materials. In the case of Amazonian dark earth (ADE) soils, the increased amount of this material is believed to be due to anthropogenic action by ancient indigenous populations. In this study, we use 16S rRNA gene pyrosequencing to assess the bacterial diversity observed in theBCfound inADEs aswell as in the dark earth itself and the adjacent Acrisol. Samples were taken from two sites, one cultivatedwith manioc and one with secondary forest cover. Analyses revealed that the community structure found in each sample had unique features. At a coarse phylogenetic resolution, the most abundant phyla in all sequence libraries were Actinobacteria, Acidobacteria, Verrucomicrobia and Proteobacteriathat were present in similar relative abundance across all samples. However, the class composition varied between them highlighting the difference between the Acrisol and the remaining samples. This result was also corroborated by the comparison of the OTU composition (at 97 % identity). Also, soil coverage has shown an effect over the community structure observed in all samples. This patternwas found to be significant through unweighted UniFrac as well as P tests. These results indicate that, although the ADEs are found in patches within the Acrisols, the contrasting characteristics found between them led to the development of significantly different communities.
Palavras-Chave: | Amazonian soils; Carbon stock; Dark earth.
Thesaurus Nal: | land use.
Categoria do assunto: | --
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (39287-1) - UPC - SP - PP - 14.00001 -  - 2014.00001 - DIS