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Land-use systems affect Archaeal community structure and functional diversity in western Amazon soils Rev. Bras. Ciênc. Solo
Navarrete,Acácio Aparecido; Taketani,Rodrigo Gouvêa; Mendes,Lucas William; Cannavan,Fabiana de Souza; Moreira,Fatima Maria de Souza; Tsai,Siu Mui.
The study of the ecology of soil microbial communities at relevant spatial scales is primordial in the wide Amazon region due to the current land use changes. In this study, the diversity of the Archaea domain (community structure) and ammonia-oxidizing Archaea (richness and community composition) were investigated using molecular biology-based techniques in different land-use systems in western Amazonia, Brazil. Soil samples were collected in two periods with high precipitation (March 2008 and January 2009) from Inceptisols under primary tropical rainforest, secondary forest (5-20 year old), agricultural systems of indigenous people and cattle pasture. Denaturing gradient gel electrophoresis of polymerase chain reaction-amplified DNA (PCR-DGGE) using the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil microbial ecology; Soil microbiology; Microbial diversity; Land use changes; Tropical soils.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500007
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Replacement of native vegetation alters the soil microbial structure in the Pampa biome Scientia Agricola
Suleiman,Afnan Khalil Ahmad; Pylro,Victor Satler; Roesch,Luiz Fernando Wurdig.
ABSTRACT: Land use change is one of the the major factors related to soil degradation and alterations in soil microbial diversity and structure. In this study, we aimed to evaluate the microbial shifts caused by deforestation of a small area of a natural forest for the introduction of a pasture in the Brazilian Pampa. The microbial abundance and structure were evaluated by molecular approaches based on quantitative Polymerase Chain Reaction (qPCR) and Ribosomal Intergenic Spacer Analysis (RISA). The microbial communities did not present significant quantitative differences, but the environmental impact caused by deforestation changed the structure of the bacterial and archaeal communities. Taking into account the percentage of shared OTUs (operational...
Tipo: Info:eu-repo/semantics/article Palavras-chave: RISA; Soil quality; Land use change; Soil microbial ecology.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100077
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