101 results

Total fungi and yeast distribution in soils over native and modified vegetation in central Brazil

Geisianny Augusta Monteiro Moreira ORCID logo , Elisa Catão Caldeira Pires ORCID logo , Cristine Chaves Barreto ORCID logo , Helson Mario Martins do Vale ORCID logo

25/nov/2020

ABSTRACT Fungi are ubiquitous components of soil microbial communities, generally comprise the largest proportion of soil biomass. They can occur as filamentous forms or unicellular yeasts, in both, as free-living or symbionts. Next generation sequencing has allowed greater depth of the access to soil fungal diversity complementing culture-dependent results. In Brazil, the state of Minas Gerais is recognized for its mining activity, which modifies the vegetation cover and consequently the soil microbial communities. To describe the fungal community (total fungi […]

Visual Abstract

Yeast species and strains differing along an altitudinal gradient in the Brazilian forest domain

Geisianny Augusta Monteiro Moreira ORCID logo , Érica Mangaravite ORCID logo , Nívea Moreira Vieira ORCID logo , Fernando Augusto da Silveira ORCID logo , Wendel Batista da Silveira ORCID logo , Helson Mario Martins do Vale ORCID logo

06/nov/2020

ABSTRACT Soil microbiota is an important component of the forest biomes, playing important roles in the soil aggregation and cycling of nutrients. Among the soil microorganisms stand out the yeasts, which are unicellular fungi involved in important soil ecological processes. The Brazilian Atlantic Forest is one of the main biodiversity hotspots in the world, and the effect of altitudinal gradient on the distribution patterns of yeast species across this ecosystem has not yet been addressed. Thus, this study aimed to […]

Visual Abstract

Isolates of Bacillus sp. from garlic: effect on corn development and plant growth-promoting mechanisms

William Gilberto Balbinot ORCID logo , Sabrina Rodrigues ORCID logo , Glória ReginaBotelho ORCID logo

21/out/2020

ABSTRACT Corn and garlic are important crops to Curitibanos region (state of Santa Catarina – Brazil), often planted in alternate cropping seasons. Production costs are high, especially due to N fertilizer, since they are highly demanding in N. In addition to reducing economic costs, the search for environmentally sustainable technologies has stimulated the study of interactions between plants and growth-promoting microorganisms. Rhizobacteria, e.g., Bacillus sp., have been presenting as growth-promoting microorganisms. Five isolates of garlic rhizosphere from 27 individuals of […]

Visual Abstract

Winter cover crops effects on soil microbial characteristics in sandy areas of Northern Shaanxi, China

Wen Wang ORCID logo , Lu Han ORCID logo , Xiong Zhang ORCID logo

21/ago/2020

ABSTRACT In sandy areas of Northern Shaanxi, after potato harvest, there are large areas of soil exposed to wind erosion from winter to spring, leading to degradation of soil quality. Planting cover crops in fallow fields is considered effective to improve soil biological properties; however, there is scarce study on the effect of winter cover crops on fallow soils in this region. In the study lasting from 2017 to 2019, four winter cover crops, i.e., alfalfa (AC), sweetclover (SC), winter […]

Visual Abstract

Comparison of field measurement methods of nitrous oxide soil emissions: from the chamber to the vial

Vanina Rosa Noemí Cosentino ORCID logo , Romina Ingrid Romaniuk ORCID logo , Ana María Lupi ORCID logo , Federico Manuel Gómez ORCID logo , Helena Rimski Korsakov ORCID logo , Carina Rosa Álvarez ORCID logo , [...]

16/jul/2020

ABSTRACT Nitrous oxide (N2O) is a greenhouse gas that contributes substantially to global climate change. The N2O soil emissions have a large uncertainty because of its low atmospheric concentration levels and enormous spatial and temporal variability, which hinders its correct field measurement. For this reason, there are many papers focused on improving the N2O measurements in the field, which focus on different parts of the measurement process. However, no studies have focused on determining the appropriate method, in terms of […]

Visual Abstract

Abundance and diversity of beetles (Insecta: Coleoptera) in land use and management systems

Alana Cristina Cunha Bernardes ORCID logo , Osmann Cid Conde Oliveira ORCID logo , Raimunda Alves Silva ORCID logo , Patrícia Maia Correia Albuquerque ORCID logo , José Manuel Macário Rebêlo ORCID logo , Jéssica Herzog Viana ORCID logo , [...]

19/jun/2020

ABSTRACT Soil beetles’ communities are responsible for many ecosystem services, and are very sensitive to environmental changes. Thus, this study aimed to evaluate the abundance and diversity of the soil coleoptera fauna under uses and management and also to identify relationships of the beetle community with soil’s physical and chemical properties. The experiment had six experimental plots set up an Oxisol (Latossolo): corn (CO), soybean (SO), 7-year-old eucalyptus (EI), 4-year-old eucalyptus (EII), preserved Cerrado (PC), and disturbed Cerrado (DC). Soil […]

Visual Abstract

Diversity and abundance of soil macrofauna in three land use systems in eastern Amazonia

Werica Larissa Farias de Vasconcelos ORCID logo , Diego de Macedo Rodrigues ORCID logo , Rafael Oliveira Carvalho Silva ORCID logo , Sônia Sena Alfaia ORCID logo

19/jun/2020

ABSTRACT Given the influence of edaphic macrofauna in the physical, chemical, and biological processes that sustain the organic matter cycle in the soil of tropical ecosystems, this study aimed to evaluate the effect of the sequence: Secondary Forest – Pasture – Eucalyptus monoculture on the macrofauna structure in Southeast of Pará State, Brazil. In each land use system, two 350 m transect were taken. The data was collected in 8 sampling sites, which were 50 m apart in each transect […]

Visual Abstract

Termite participation in the soil-forming processes of ‘murundus’ structures in the semi-arid region of Brazil

Henrique Jesus de Souza ORCID logo , Jacques Hubert Charles Delabie ORCID logo , George Andrade Sodré ORCID logo

26/maio/2020

ABSTRACT Regularly spaced earth mounds called “murundus” are scattered in several landscapes in the semi-arid region of Brazil. Although recent evidence indicates that termites are involved in the building of murundus, the contribution of these insects to soil-forming processes in those structures remains poorly understood. In this study, we tested a set of hypotheses to examine whether there are consistent evidence for suggesting the participation of termites in the formation of murundus soils. Morphological and physicochemical features of murundus were […]

Visual Abstract

Potato cultivation and livestock effects on microorganism functional groups in soils from the neotropical high Andean Páramo

Lizeth Manuela Avellaneda-Torres ORCID logo , Tomás León Sicard ORCID logo , Edlin Guerra Castro ORCID logo , Esperanza Torres Rojas ORCID logo

02/abr/2020

ABSTRACT Páramo ecosystems are of great importance because they are considered hotspots within the Tropical Andes. They are also very important for their role as producers and regulators of water processes in the Neotropic. However, the human occupation of the Colombian Páramos has generated conflict between environmental benefits and productive land uses, specifically the potato cultivation and livestock. To assess possible changes associated with potato cultivation (Solanum tuberosum L.) and livestock on the microbial communities of Páramo soils, the objective […]

Visual Abstract

Summer Cover Crops Shoot Decomposition and Nitrogen Release in a No-Tilled Sandy Soil

Douglas Adams Weiler ORCID logo , Sandro José Giacomini ORCID logo , Celso Aita ORCID logo , Raquel Schmatz ORCID logo , Getúlio Elias Pilecco ORCID logo , Bruno Chaves ORCID logo , [...]

01/nov/2019

ABSTRACT Cover crops have numerous benefits when used in a no-till system. Understanding the processes of decomposition and N release of summer cover crops (SCC) may help select species and management to be used in cropping systems. This study aimed to evaluate C and N loss of SCC shoots. Six SCCs were evaluated: velvet bean (Mucuna aterrima), pearl millet (Pennisetum americanum), dwarf pigeon pea (Cajanus cajan), sunn hemp (Crotalaria juncea), showy rattlebox (Crotalaria spectabilis), and jack bean (Canavalia ensiformis). The […]

Visual Abstract
1 2 3 4 5 6 11