scholarly journals Forest-to-pasture conversion increases the diversity of the phylum Verrucomicrobia in Amazon rainforest soils

2015 ◽  
Vol 6 ◽  
Author(s):  
Kshitij Ranjan ◽  
Fabiana S. Paula ◽  
Rebecca C. Mueller ◽  
Ederson da C. Jesus ◽  
Karina Cenciani ◽  
...  
Keyword(s):  
Amazon Rainforest ◽  
Forest To Pasture Conversion ◽  
Pasture Conversion

scholarly journals Forest-to-pasture conversion and recovery based on assessment of microbial communities in Eastern Amazon rainforest

2018 ◽  
Vol 95 (3) ◽  
Author(s):  
Alexandre Pedrinho ◽  
Lucas William Mendes ◽  
Luis Fernando Merloti ◽  
Mariley de Cassia da Fonseca ◽  
Fabiana de Souza Cannavan ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Amazon Rainforest ◽  
Forest To Pasture Conversion ◽  
Pasture Conversion

Modeling changes in soil organic matter in Amazon forest to pasture conversion with the Century model

2004 ◽  
Vol 10 (5) ◽  
pp. 815-832 ◽  
Author(s):  
Carlos Eduardo P. Cerri ◽  
Keith Paustian ◽  
Martial Bernoux ◽  
Reynaldo L. Victoria ◽  
Jerry M. Melillo ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Amazon Forest ◽  
Century Model ◽  
Forest To Pasture Conversion ◽  
Pasture Conversion

scholarly journals Amazonian soil metagenomes indicate different physiological strategies of microbial communities in response to land use change

2020 ◽  
Author(s):  
Md Abdul Wadud Khan ◽  
Brendan J. M. Bohannan ◽  
Kyle M. Meyer ◽  
Ann M. Klein ◽  
Klaus Nüsslein ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Ecological Processes ◽  
Carbohydrate Utilization ◽  
Protein Coding ◽  
Shotgun Metagenomics ◽  
Exchangeable Acidity ◽  
Protein Coding Genes ◽  
Animal Populations ◽  
Forest To Pasture Conversion ◽  
Pasture Conversion

ABSTRACTDespite the global importance in ecological processes, the Amazon rainforest has been subjected to high rates of deforestation, mostly for pasturelands, over the last few decades. In this study, we used a combination of deep shotgun metagenomics and a machine learning approach to compare physiological strategies of microbial communities between contrasting forest and pasture soils. We showed that microbial communities (bacteria, archaea and viruses), and the composition of protein-coding genes are distinct in each ecosystem. The diversities of these metagenomic datasets are strongly correlated, indicating that the protein-coding genes found in any given sample of these soil types are predictable from their taxonomic lineages. Shifts in metagenome profiles reflected potential physiological differences caused by forest-to-pasture conversion with alterations in gene abundances related to carbohydrate and energy metabolisms. These variations in these gene contents are associated with several soil factors including C/N, temperature and H++Al3+ (exchangeable acidity). These data underscore that microbial community taxa and protein-coding genes co-vary. Differences in gene abundances for carbohydrate utilization, energy, amino acid, and xenobiotic metabolisms indicate alterations of physiological strategy with forest-to-pasture conversion, with potential consequences to C and N cycles. Our analysis also indicated that soil virome was altered and shifts in the viral community provide insights into increased health risks to human and animal populations.

scholarly journals Consequence of forest-to-pasture conversion on CH4fluxes in the Brazilian Amazon Basin

1996 ◽  
Vol 101 (D13) ◽  
pp. 18547-18554 ◽  
Author(s):  
Paul A. Steudler ◽  
Jerry M. Melillo ◽  
Brigitte J. Feigl ◽  
Christopher Neill ◽  
Marisa C. Piccolo ◽  
...  
Keyword(s):  
Amazon Basin ◽  
Brazilian Amazon ◽  
Forest To Pasture Conversion ◽  
Pasture Conversion

scholarly journals Land-use and forest floor explain prokaryotic metacommunity structuring and spatial turnover in Amazonian forest-to-pasture conversion areas

2020 ◽  
Author(s):  
Fernando Igne Rocha ◽  
Thiago Gonçalves Ribeiro ◽  
Marcelo Antoniol Fontes ◽  
Stefan Schwab ◽  
Marcia Reed Rodrigues Coelho ◽  
...  
Keyword(s):  
Land Use ◽  
Forest Floor ◽  
Soil Microbial Communities ◽  
Bulk Soil ◽  
Soil Types ◽  
Anthropogenic Pressure ◽  
Soil Microbial ◽  
Spatial Turnover ◽  
Forest To Pasture Conversion ◽  
Pasture Conversion

ABSTRACTAdvancing extensive cattle production shifts the forest landscape and is considered one of the main drivers against biodiversity conservation in the Brazilian Amazonia. Considering soil as an ecosystem it becomes vital to identify the effects of land-use changes on soil microbial communities, structure, as well as its ecological functions and services. Herein, we explored relationships between land-use, soil types and forest floor (i.e., association between litter, root layer and bulk soil) on the prokaryotic metacommunity structuring in the Western Amazonia. Sites under high anthropogenic pressure were evaluated along a gradient of ± 800 km. Prokaryotic metacommunity are synergistically affected by soil types and land-use systems. Especially, the gradient of soil fertility and land-use shapes the structuring of the metacommunity and determines its composition. Forest-to-pasture conversion increases alpha, beta, and gamma diversities when considering only the prokaryotes from the bulk soil. Beta diversity was significantly higher in all forests when the litter and root layer were taken into account with the bulk soil. Our argumentation is that the forest floor harbors a prokaryotic metacommunity that adds at the regional scale of diversity a spatial turnover hitherto underestimated. Our findings highlight the risks of biodiversity loss and, consequently, the soil microbial diversity maintenance in tropical forests.

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