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Papers by André Ferreira Rodrigues

Research paper thumbnail of Biotic and abiotic drivers of stemflow carbon enrichment ratio in tropical trees

Research paper thumbnail of Stemflow in a neotropical forest remnant: vegetative determinants, spatial distribution and correlation with soil moisture

Trees, 2017

of mosses were selected. A complete spatial randomness (CSR) between the SF classes was confirmed... more of mosses were selected. A complete spatial randomness (CSR) between the SF classes was confirmed. We observed that SF impacted the SWC in the superficial layers. Therefore, tree size, exposure, and seasonal differences were the key drivers of SF amount due to the leaf losses during the dry period. Heterogeneity of the canopy is probably responsible for the CSR of SF in the study area. We expect that this study will contribute to the understanding of the hydrological processes in the Atlantic forest hotspot by clarifying the aspects of water capture by trees.

Research paper thumbnail of Throughfall spatial variability in a neotropical forest: Have we correctly accounted for time stability?

Journal of Hydrology, 2022

Research paper thumbnail of Modeling canopy interception under drought conditions: The relevance of evaporation and extra sources of energy

Modeling canopy interception is fundamental for understanding the forests' role in local and ... more Modeling canopy interception is fundamental for understanding the forests' role in local and regional hydrology. In this study, canopy interception (CI), throughfall (TF), and stemflow (SF) were evaluated for a semi-deciduous Atlantic Forest (AFR) from 2013 to 2019, where a prolonged dry period occurred. The Gash and Liu models were analyzed in detail to determine the most appropriate for modeling CI throughout drought conditions. Thus, the climatic parameters were retrieved annually by a modified TF-based method (EI%), whereas the structural parameters represented the entire period. The contribution of the energy stored in the forest (i.e. air and biomass; Q) to CI was also assessed in the AFR stand. Both models performed well when using EI%, as the Gash model overestimated CI by 71 mm (4.6%), whereas the Liu model underestimated it by only 13 mm (0.85%). This performance is due to an increased Q and turbulent mechanisms (such as advection and strong updrafts) that occur in dro...

Research paper thumbnail of Spatial and Temporal Patterns in Carbon and Nitrogen Inputs by Net Precipitation in Atlantic Forest, Brazil

Forest Science

Understanding both carbon and nitrogen temporal and spatial inputs by rainfall in tropical forest... more Understanding both carbon and nitrogen temporal and spatial inputs by rainfall in tropical forests is critical for proper forest conservation and management and might ultimately elucidate how climate change might affect nutrient dynamics in forest ecosystems. This study aimed to quantify the net precipitation contribution to the Atlantic Forest’s total carbon (C) and total nitrogen (N), identifying potential differences between these inputs regarding temporal (seasonal and monthly) and spatial scales. Rainfall samples were collected before and after interacting with the forest canopy from May 2018 to April 2019. The rainfall was enriched after crossing the forest canopy. Significant differences were found for gross rainfall and net precipitation between annual carbon (104.13 kg ha−1 and 193.18 kg ha−1) and nitrogen (16.81 kg ha−1 and 36.95 kg ha−1) inputs, respectively. Moreover, there was seasonal variability in the C and N inputs with 75% occurring in the wet season. Overall, the ...

Research paper thumbnail of Water balance of an Atlantic forest remnant under a prolonged drought period

Ciência e Agrotecnologia, 2021

Since prolonged droughts have impacted Atlantic forests in Southeastern Brazil, further investiga... more Since prolonged droughts have impacted Atlantic forests in Southeastern Brazil, further investigations to understand the effects of such stressful conditions in their hydrological behavior are required. This study aimed to assess the changes in the water balance of a semi-deciduous Atlantic forest remnant and how the forest responds to droughts. The Standardized Precipitation-Evapotranspiration Index was applied to identify droughts (from 1961 to 2019) and their severity in both the hydrological year and summer scales. Drought impacts on actual evapotranspiration, potential percolation, and soil water storage were assessed using Hydrus-1D, having net precipitation and potential evapotranspiration as inputs. Error analyses (< 10%) confirmed Hydrus-1D suitability for simulating soil moisture. Uncertainties regarding the soil saturated hydraulic conductivity are due to preferential flows, which are not accounted for in Richards’ equation. Drought intensification changed forest hydro...

Research paper thumbnail of Spatiotemporal modelling of soil moisture in an A tlantic forest through machine learning algorithms

European Journal of Soil Science

Research paper thumbnail of Desempenho Dos Métodos De Hargraves e Priestley-Taylor Na Estimativa Da Evapotranspiração De Referência

Revista Augustus

A estimativa precisa da evapotranspiração é essencial para o desenvolvimento de estudos hidrológi... more A estimativa precisa da evapotranspiração é essencial para o desenvolvimento de estudos hidrológicos, principalmente em âmbitos de bacias hidrográficas. Todavia, os dados necessários para a aplicação do método de Penman-Monteith padronizado pela FAO (PM) nem sempre estão disponíveis. Neste sentido, é necessário que métodos mais simples como o de Priestley-Taylor (PT) e Hargreaves (HG) sejam avaliados para superar esta barreira instrumental. Por conseguinte, o presente trabalho teve como objetivo avaliar o desempenho dos métodos de PT e HG para dois anos com precipitações abaixo da média na cidade de Lavras, Minas Gerais. O período de estudo abrangeu os anos de 2017 e 2018. Os modelos também foram avaliados com relação ao período úmido e seco do ano hidrológico 2017/2018. O Modelo de PT (R2 = 0,91) sobressaiu-se com relação ao de HG (R2 = 0,64) na estimativa da evapotranspiração de referência. O modelo de HG superestimou os valores de PM tanto para o período todo (PBIAS = -40) quanto...

Research paper thumbnail of Long-term ecological trends of small secondary forests of the atlantic forest hotspot: A 30-year study case

Forest Ecology and Management

Research paper thumbnail of Tendências em índices extremos de precipitação e temperatura do ar na cidade de Uberaba, MG

Research paper thumbnail of Estimativas Da Taxa De Entrega De Sedimentos e Áreas Suscepítveis À Erosão Em Uma Bacia Hidrográfica No Sul De Minas Gerais – Brasil

REVISTA DA UNIVERSIDADE VALE DO RIO VERDE

Research paper thumbnail of Rainfall Water Quality Under Different Forest Stands

CERNE

Significant differences were found between an Atlantic Forest remnant and a Eucalyptus urograndis... more Significant differences were found between an Atlantic Forest remnant and a Eucalyptus urograndis plantation in terms of throughfall indicators. The Atlantic Forest remnant receives a higher values of NH 3 and NH 4 from the surrounding lands. Forests promote rain water enrichment with nutrients, performing key role on biogeochemical cycles.

Research paper thumbnail of Soil water content and net precipitation spatial variability in an Atlantic forest remnant

Acta Scientiarum. Agronomy, Sep 20, 2019

This study was carried out in an Atlantic forest remnant in Southeastern Brazil and aimed to spat... more This study was carried out in an Atlantic forest remnant in Southeastern Brazil and aimed to spatially model the soil water content (SWC) and net precipitation (NP) on a monthly time scale and to assess the spatial behavior of these hydrological variables in the different seasons. NP is defined by summing throughfall and stemflow, which have been collected after each rain event and accumulated monthly. Soil moisture measurements were carried out monthly up to a depth of 1.00 m and then integrated to obtain the SWC. The exponential semivariogram model was fitted for both hydrological variables, and the goodness-of-fit was assessed by a cross-validation procedure, spatial dependence degree (SDD) and spatial dependence index (SDI). This model provided adequate performance for SWC and NP mapping according to the cross-validation statistics. Based on the SDD, both variables have been classified as a 'strong spatial dependence structure'. Nevertheless, when the SDI was assessed, NP showed less spatial dependence, while the SWC maintained almost the same performance. Kriging maps pictured the regional climate seasonality due to higher values of both variables in spring and summer than in autumn and winter seasons. However, correlations between NP and SWC are not expressive in the studied period.

Research paper thumbnail of Stemflow in a neotropical forest remnant: vegetative determinants, spatial distribution and correlation with soil moisture

of mosses were selected. A complete spatial randomness (CSR) between the SF classes was confirmed... more of mosses were selected. A complete spatial randomness (CSR) between the SF classes was confirmed. We observed that SF impacted the SWC in the superficial layers. Therefore, tree size, exposure, and seasonal differences were the key drivers of SF amount due to the leaf losses during the dry period. Heterogeneity of the canopy is probably responsible for the CSR of SF in the study area. We expect that this study will contribute to the understanding of the hydrological processes in the Atlantic forest hotspot by clarifying the aspects of water capture by trees.

Research paper thumbnail of Biotic and abiotic drivers of stemflow carbon enrichment ratio in tropical trees

Research paper thumbnail of Stemflow in a neotropical forest remnant: vegetative determinants, spatial distribution and correlation with soil moisture

Trees, 2017

of mosses were selected. A complete spatial randomness (CSR) between the SF classes was confirmed... more of mosses were selected. A complete spatial randomness (CSR) between the SF classes was confirmed. We observed that SF impacted the SWC in the superficial layers. Therefore, tree size, exposure, and seasonal differences were the key drivers of SF amount due to the leaf losses during the dry period. Heterogeneity of the canopy is probably responsible for the CSR of SF in the study area. We expect that this study will contribute to the understanding of the hydrological processes in the Atlantic forest hotspot by clarifying the aspects of water capture by trees.

Research paper thumbnail of Throughfall spatial variability in a neotropical forest: Have we correctly accounted for time stability?

Journal of Hydrology, 2022

Research paper thumbnail of Modeling canopy interception under drought conditions: The relevance of evaporation and extra sources of energy

Modeling canopy interception is fundamental for understanding the forests' role in local and ... more Modeling canopy interception is fundamental for understanding the forests' role in local and regional hydrology. In this study, canopy interception (CI), throughfall (TF), and stemflow (SF) were evaluated for a semi-deciduous Atlantic Forest (AFR) from 2013 to 2019, where a prolonged dry period occurred. The Gash and Liu models were analyzed in detail to determine the most appropriate for modeling CI throughout drought conditions. Thus, the climatic parameters were retrieved annually by a modified TF-based method (EI%), whereas the structural parameters represented the entire period. The contribution of the energy stored in the forest (i.e. air and biomass; Q) to CI was also assessed in the AFR stand. Both models performed well when using EI%, as the Gash model overestimated CI by 71 mm (4.6%), whereas the Liu model underestimated it by only 13 mm (0.85%). This performance is due to an increased Q and turbulent mechanisms (such as advection and strong updrafts) that occur in dro...

Research paper thumbnail of Spatial and Temporal Patterns in Carbon and Nitrogen Inputs by Net Precipitation in Atlantic Forest, Brazil

Forest Science

Understanding both carbon and nitrogen temporal and spatial inputs by rainfall in tropical forest... more Understanding both carbon and nitrogen temporal and spatial inputs by rainfall in tropical forests is critical for proper forest conservation and management and might ultimately elucidate how climate change might affect nutrient dynamics in forest ecosystems. This study aimed to quantify the net precipitation contribution to the Atlantic Forest’s total carbon (C) and total nitrogen (N), identifying potential differences between these inputs regarding temporal (seasonal and monthly) and spatial scales. Rainfall samples were collected before and after interacting with the forest canopy from May 2018 to April 2019. The rainfall was enriched after crossing the forest canopy. Significant differences were found for gross rainfall and net precipitation between annual carbon (104.13 kg ha−1 and 193.18 kg ha−1) and nitrogen (16.81 kg ha−1 and 36.95 kg ha−1) inputs, respectively. Moreover, there was seasonal variability in the C and N inputs with 75% occurring in the wet season. Overall, the ...

Research paper thumbnail of Water balance of an Atlantic forest remnant under a prolonged drought period

Ciência e Agrotecnologia, 2021

Since prolonged droughts have impacted Atlantic forests in Southeastern Brazil, further investiga... more Since prolonged droughts have impacted Atlantic forests in Southeastern Brazil, further investigations to understand the effects of such stressful conditions in their hydrological behavior are required. This study aimed to assess the changes in the water balance of a semi-deciduous Atlantic forest remnant and how the forest responds to droughts. The Standardized Precipitation-Evapotranspiration Index was applied to identify droughts (from 1961 to 2019) and their severity in both the hydrological year and summer scales. Drought impacts on actual evapotranspiration, potential percolation, and soil water storage were assessed using Hydrus-1D, having net precipitation and potential evapotranspiration as inputs. Error analyses (< 10%) confirmed Hydrus-1D suitability for simulating soil moisture. Uncertainties regarding the soil saturated hydraulic conductivity are due to preferential flows, which are not accounted for in Richards’ equation. Drought intensification changed forest hydro...

Research paper thumbnail of Spatiotemporal modelling of soil moisture in an A tlantic forest through machine learning algorithms

European Journal of Soil Science

Research paper thumbnail of Desempenho Dos Métodos De Hargraves e Priestley-Taylor Na Estimativa Da Evapotranspiração De Referência

Revista Augustus

A estimativa precisa da evapotranspiração é essencial para o desenvolvimento de estudos hidrológi... more A estimativa precisa da evapotranspiração é essencial para o desenvolvimento de estudos hidrológicos, principalmente em âmbitos de bacias hidrográficas. Todavia, os dados necessários para a aplicação do método de Penman-Monteith padronizado pela FAO (PM) nem sempre estão disponíveis. Neste sentido, é necessário que métodos mais simples como o de Priestley-Taylor (PT) e Hargreaves (HG) sejam avaliados para superar esta barreira instrumental. Por conseguinte, o presente trabalho teve como objetivo avaliar o desempenho dos métodos de PT e HG para dois anos com precipitações abaixo da média na cidade de Lavras, Minas Gerais. O período de estudo abrangeu os anos de 2017 e 2018. Os modelos também foram avaliados com relação ao período úmido e seco do ano hidrológico 2017/2018. O Modelo de PT (R2 = 0,91) sobressaiu-se com relação ao de HG (R2 = 0,64) na estimativa da evapotranspiração de referência. O modelo de HG superestimou os valores de PM tanto para o período todo (PBIAS = -40) quanto...

Research paper thumbnail of Long-term ecological trends of small secondary forests of the atlantic forest hotspot: A 30-year study case

Forest Ecology and Management

Research paper thumbnail of Tendências em índices extremos de precipitação e temperatura do ar na cidade de Uberaba, MG

Research paper thumbnail of Estimativas Da Taxa De Entrega De Sedimentos e Áreas Suscepítveis À Erosão Em Uma Bacia Hidrográfica No Sul De Minas Gerais – Brasil

REVISTA DA UNIVERSIDADE VALE DO RIO VERDE

Research paper thumbnail of Rainfall Water Quality Under Different Forest Stands

CERNE

Significant differences were found between an Atlantic Forest remnant and a Eucalyptus urograndis... more Significant differences were found between an Atlantic Forest remnant and a Eucalyptus urograndis plantation in terms of throughfall indicators. The Atlantic Forest remnant receives a higher values of NH 3 and NH 4 from the surrounding lands. Forests promote rain water enrichment with nutrients, performing key role on biogeochemical cycles.

Research paper thumbnail of Soil water content and net precipitation spatial variability in an Atlantic forest remnant

Acta Scientiarum. Agronomy, Sep 20, 2019

This study was carried out in an Atlantic forest remnant in Southeastern Brazil and aimed to spat... more This study was carried out in an Atlantic forest remnant in Southeastern Brazil and aimed to spatially model the soil water content (SWC) and net precipitation (NP) on a monthly time scale and to assess the spatial behavior of these hydrological variables in the different seasons. NP is defined by summing throughfall and stemflow, which have been collected after each rain event and accumulated monthly. Soil moisture measurements were carried out monthly up to a depth of 1.00 m and then integrated to obtain the SWC. The exponential semivariogram model was fitted for both hydrological variables, and the goodness-of-fit was assessed by a cross-validation procedure, spatial dependence degree (SDD) and spatial dependence index (SDI). This model provided adequate performance for SWC and NP mapping according to the cross-validation statistics. Based on the SDD, both variables have been classified as a 'strong spatial dependence structure'. Nevertheless, when the SDI was assessed, NP showed less spatial dependence, while the SWC maintained almost the same performance. Kriging maps pictured the regional climate seasonality due to higher values of both variables in spring and summer than in autumn and winter seasons. However, correlations between NP and SWC are not expressive in the studied period.

Research paper thumbnail of Stemflow in a neotropical forest remnant: vegetative determinants, spatial distribution and correlation with soil moisture

of mosses were selected. A complete spatial randomness (CSR) between the SF classes was confirmed... more of mosses were selected. A complete spatial randomness (CSR) between the SF classes was confirmed. We observed that SF impacted the SWC in the superficial layers. Therefore, tree size, exposure, and seasonal differences were the key drivers of SF amount due to the leaf losses during the dry period. Heterogeneity of the canopy is probably responsible for the CSR of SF in the study area. We expect that this study will contribute to the understanding of the hydrological processes in the Atlantic forest hotspot by clarifying the aspects of water capture by trees.