Genetic and Functional Diversities of Microbial Communities in Amazonian Soils Under Different Land Uses and Cultivation

Cenciani, Karina; Mazzetto, André Mancebo; Lammel, Daniel R.; Fracetto, Felipe José Cury; Fracetto, Giselle Gomes Monteiro; Frazão, Leidivan Almeida; Cerri, Carlos Eduardo Pellegrino; Feigl, Brigitte Josefine

doi:10.5772/16598

Cited by 4 publications

(6 citation statements)

References 47 publications

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“…Therefore, in monocropping pastures with grass, the microbial community is composed by bacteria that present higher ability to growth in oligotrophic environment and metabolize more simple C sources (Buyer et al, ). Our results agree with Cenciani et al (), which found higher microbial catabolic diversity in native forests than pastures in Amazon region. This may be due to the higher content of (or diversity of) C sources in the rhizosphere soil from agroforestry and native forest, which is considered as the driving force for microbial density and activity (Baudoin et al, ).…”

Section: Discussionsupporting

confidence: 93%

The Impact of Pasture Systems on Soil Microbial Biomass and Community‐level Physiological Profiles

et al. 2016

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The intensive use of soil for pasture establishment has promoted land degradation. However, well-managed pasture systems may contribute to the improvement of the soil biological properties. The aim of this study was to evaluate the soil microbial biomass, enzymes activity, and catabolic diversity under six different pastures: Andropogon gayanus, Brachiaria brizantha, Panicum maximum, Cynodon dactilon, agroforestry system, and native vegetation. Soil microbial biomass was estimated by the fumigation-extraction method, while enzyme activity was determined through substrate use. The catabolic diversity was evaluated by the community-level physiological profiling method. Microbial biomass C was higher in the soils under the agroforestry system and native vegetation, whereas microbial biomass N was higher in the soil under Brachiaria. Acid phosphatase activity and fluorescein diacetate hydrolysis were higher in agroforestry system and native vegetation, respectively. Dehydrogenase activity was higher in the soil under Brachiaria and Cynodon. Richness and diversity of community-level physiological profiling were higher in the soils under the agroforestry system and native vegetation. The highest numbers of C sources metabolized by microorganisms were found in the agroforestry system and native vegetation. This study showed that soil microbial community from pasture systems subjected to different management showed different biomass, activity, and catabolic diversity.

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Section: Discussionsupporting

confidence: 93%

The Impact of Pasture Systems on Soil Microbial Biomass and Community‐level Physiological Profiles

et al. 2016

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“…Maioria dos organismos envolvidos nesses ciclos não pode ser cultivada por métodos convencionais, fazendo-se necessário o uso de técnicas de biologia molecular, como análise da estrutura microbiana por T-RFLP, ou quantificação de genes relacionados aos processos por PCR quantitativa BOERSMA, 2011). Usando essas técnicas, o papel funcional das populações microbianas nos processos de transformação do solo nos diferentes usos da terra na fronteira de expansão agrícola podem ser melhor entendidos (CENCIANI et al, 2011). É importante enfatizar que os ecossistemas Amazônicos são sensíveis ao uso da terra (FUJISAKA et al, 1998;MARENGO, 2006;CENCIANI et al, 2011).…”

Section: Esses Mesmos Organismos Fazem Parte Dos Ciclos Biogeoquímicounclassified

“…Usando essas técnicas, o papel funcional das populações microbianas nos processos de transformação do solo nos diferentes usos da terra na fronteira de expansão agrícola podem ser melhor entendidos (CENCIANI et al, 2011). É importante enfatizar que os ecossistemas Amazônicos são sensíveis ao uso da terra (FUJISAKA et al, 1998;MARENGO, 2006;CENCIANI et al, 2011). A vegetação nativa é importante para a resiliência dos ecossistemas e um manejo inadequado pode causar perturbações severas, como degradação de pastagens e desertificação.…”

Section: Esses Mesmos Organismos Fazem Parte Dos Ciclos Biogeoquímicounclassified

“…Most of the organisms involved in these cycles have not yet been cultivated by conventional methods, making the use of biochemical and culture independent molecular methods necessary, such as the study of microbial structure by T-RFLP and the analysis and quantification of genes related to these processes by real time PCR (VAN ELSAS; BOERSMA, 2011). Using these techniques, the functional role of the active microbial population in the processes of soil transformation under different land use in the agricultural frontier expansion may be better understood (CENCIANI et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…It is important to highlight that Amazonian ecosystems are sensitive to land use changes (FUJISAKA et al, 1998;MARENGO, 2006;CENCIANI et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Soil microbiota related to carbon, nitrogen and greenhouse gas cycles across different land uses in Southwestern Amazonia

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C and N stocks are not impacted by land use change from Brazilian Savanna (Cerrado) to agriculture despite changes in soil fertility and microbial abundances

Lammel

Butterbach‐Bahl

Cerri

et al. 2017

J. Plant Nutr. Soil Sci.

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Central Brazil is the region with the most dynamic agriculture expansion worldwide, where tropical forests and Cerrado (Brazilian savanna) are converted to pastures and crop fields. Following deforestation, agricultural practices, such as fertilization, tillage and crop rotations, alter soil parameters and affect microbial abundances and the C and N cycles. The objective of this study was to compare changes in soil fertility, stocks of soil C and N, microbial biomass, and abundance of bacteria, fungi and archaea in Cerrado soils following land use change to crops (soybean/corn/cotton) and pasture (the perennial forage grass Brachiaria brizantha A. Rich.). Agriculture increased soil fertility and conserved soil C and N since their absolute concentration values were highest in agriculture soils and the C and N stocks adjusted by soil density were similar to the native vegetation soils. At the same time, agriculture changed the microbial abundances (decrease of microbial biomass C and N, increase of archaea, and reduction of bacteria and fungi at the crop sites), and N dynamics (increase of soil ammonium and nitrate concentrations). Even if these changes can be beneficial for food and agricultural commodities production, all these soil alterations should be further investigated due to their possible unknown effects on biosphere-hydrosphere-atmosphere exchange processes such as greenhouse gases emissions and nitrate leaching.

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Genetic and Functional Diversities of Microbial Communities in Amazonian Soils Under Different Land Uses and Cultivation

Cited by 4 publications

References 47 publications

The Impact of Pasture Systems on Soil Microbial Biomass and Community‐level Physiological Profiles

The Impact of Pasture Systems on Soil Microbial Biomass and Community‐level Physiological Profiles

Soil microbiota related to carbon, nitrogen and greenhouse gas cycles across different land uses in Southwestern Amazonia

C and N stocks are not impacted by land use change from Brazilian Savanna (Cerrado) to agriculture despite changes in soil fertility and microbial abundances

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