Micaela Tosi

Micaela Tosi
University of Guelph | UOGuelph · School of Environmental Sciences

PhD

About

25
Publications
6,471
Reads
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311
Citations
Citations since 2017
16 Research Items
297 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Additional affiliations
October 2009 - April 2017
Universidad de Buenos Aires
Position
  • Assistant

Publications

Publications (25)
Article
In agroecosystems, efficient fertilizer use is key to optimizing productivity and reducing nutrient losses that can be detrimental for the environment, such as nitrous oxide (N2O) emissions. Because microbial communities regulate nitrogen (N) fate in soils, some agrochemicals inhibit specific transformations to reduce N losses. Our study aimed to d...
Article
Full-text available
The world’s population is expected to grow to almost 10 billion by 2050, placing unprecedented demands on agriculture and natural resources. The risk in food security is also aggravated by climate change and land degradation, which compromise agricultural productivity. In recent years, our understanding of the role of microbial communities on ecosy...
Article
Full-text available
Global population growth poses a threat to food security in an era of increased ecosystem degradation, climate change, soil erosion, and biodiversity loss. In this context, harnessing naturally-occurring processes such as those provided by soil and plant-associated microorganisms presents a promising strategy to reduce dependency on agrochemicals....
Article
Nitrogen (N) fertilization in agroecosystems can alter soil physicochemical and biological properties. Yet, little is known about the relative importance of short- and long-term effects of N inputs on soil microbial communities. In a continuous corn (Zea mays L.) trial from southern Ontario, Canada, we analyzed the response of soil microbial commun...
Article
Different tillage and nitrogen (N) fertilization practices markedly alter soil carbon dynamics, yet the underlying mechanisms and their interactive controls on soil organic matter (OM) biogeochemistry are still not well defined. Soil samples were collected from a 24-year field trial comprising of two tillage practices (conventional and conservation...
Article
Full-text available
Sustainable agricultural practices such as cover crops (CCs) and residue retention are increasingly applied to counteract detrimental consequences on natural resources. Since agriculture affects soil properties partly via microbial communities, it is critical to understand how these respond to different management practices. Our study analyzed five...
Preprint
Full-text available
Deforestation threatens the integrity of the Amazon biome and the ecosystem services it provides. Most of this deforested land is converted to pastures for cattle raising. Early studies revealed that forest-to-pasture conversion alters the flux of methane gas (CH4) in Amazonian soils, driving a switch from acting as a sink to a source of atmospheri...
Preprint
Full-text available
Deforestation threatens the integrity of the Amazon biome and the ecosystem services it provides, including greenhouse gas mitigation. Forest-to-pasture conversion has been shown to alter the flux of methane gas (CH4) in Amazonian soils, driving a switch from acting as a sink to a source of atmospheric CH4. This study aimed to better understand thi...
Preprint
Sustainable agricultural practices such as crop diversification, cover crops and residue retention are increasingly applied to counteract detrimental effects of agriculture on natural resources. Since part of their effects occur via changes soil microbial communities, it is critical to understand how these respond to different practices. Our study...
Article
The Haast chronosequence in New Zealand is a ∼6500-year dune formation series, characterized by rapid podzol development, phosphorus (P) depletion, and a decline in aboveground biomass. We examined bacterial and fungal community composition within mineral soil fractions using amplicon-based high-throughput sequencing (Illumina MiSeq). We targeted b...
Chapter
Even though beneficial plant–microbe relationships have been studied for over one century, the recognition of a complex microbiome inhabiting the plant is relatively recent and reveals new opportunities for manipulating plant growth and health. Endophytes, commonly defined as non-pathogenic microorganisms inhabiting the plant interior, constitute a...
Article
Tropical and subtropical ecosystems are widely affected by the expansion of agriculture over pristine lands. Despite research efforts, knowledge of the impact of land-use change on soil is still limited by intrinsic variability, inconsistent results and inadequate replication. This study aimed to better understand the consequences of land-use chang...
Article
The Southern Andean Yungas in Northwest Argentina constitute one of the main biodiversity hotspots in the world. Considerable changes in land use have taken place in this ecoregion, predominantly related to forest conversion to croplands, inducing losses in above-ground biodiversity and with potential impact on soil microbial communities. In this s...
Conference Paper
Full-text available
Las prácticas agrícolas ocasionan cambios en la biota edáfica alterando el funcionamiento del ecosistema. Estas alteraciones pueden ser detectadas tempranamente a través del monitoreo de las comunidades microbianas del suelo, dada su alta sensibilidad y rápida respuesta. El objetivo de este trabajo fue evaluar la estructura, funcionalidad y activid...
Article
Full-text available
The genetic diversity among 31 putative Azotobacter isolates obtained from agricultural and non-agricultural soils was assessed using rep-PCR genomic fingerprinting and identified to species level by ARDRA and partial 16S rRNA gene sequence analysis. High diversity was found among the isolates, identified as A. chroococcum, A. salinestris, and A. a...
Data
microbianas en suelos bajo di-ferentes prácticas agrícolas, empleando distintas metodologías independientes y complementarias. Se analizaron suelos bajo labranza convencional (LC) o siembra directa (SD), fertilizados o no con fósforo, y con maíz o soja como cultivo antecesor. Para analizar la estructura y funcionalidad potencial de las comunidades...
Chapter
Full-text available
La creciente demanda de superficie agrícola conduce a la ocupación de tierras prístinas y entre sus principales consecuencias se incluyen cambios sustanciales en el funcionamiento del suelo. Se estudiaron suelos de una cronosecuencia de uso agrícola (0, 3-5, 11-14 y 28-30 años) en tres fincas (PC, IS y LR) de Las Lajitas, Salta. Se realizaron deter...
Conference Paper
Full-text available
Actualmente existe una batería de modernas metodologías microbiológicas que permiten evidenciar cambios sutiles en la estructura y composición de los suelos. La aplicación de estas metodologías no está muy difundida porque en ocasiones sus sensibilidades son tan altas que dificulta el análisis de los resultados. El objetivo de este trabajo es es...

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