Carlos Ernesto Gonçalves Reynaud Schaefer's research while affiliated with Universidade Federal de Viçosa (UFV) and other places

Publications (99)

Article
Under the UN-Decade of Ecosystem Restoration and Bonn Challenge, second-growth forest is promoted as a global solution to climate change, degradation and associated losses of biodiversity and ecosystem services. Second growth is often invaded by alien tree species and understanding how this impacts carbon stock and biodiversity recovery is key for...
Article
Antarctic soils are heavily affected by climate change in terms of properties and ecosystem functions. With increasing global temperatures, the frequency of freeze and thaw cycles of Antarctic soils will increase, thus affecting their mechanical behavior, with varying responses in erosion. This study quantitatively evaluated the effect of increasin...
Chapter
In this chapter, we first describe the global nature of tropical regoliths, showing the remarkable differences with temperate latitudes counterparts. It is shown that most regoliths and subsoils in the tropics are polycyclic and not directly attributable to the present-day climates because of inherited features from past climatic conditions. The Br...
Chapter
The effects of biota on the regolith occur at scales that range from the smallest organisms (bacteria) to the largest living ones (big trees). In this chapter, we examined how biological agents, especially plant roots, ants, and termites, play a key role in regolith and subsoil formation. We highlighted the processes of pedoturbation, microaggregat...
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Currently, more than five years after the Fundão dam failure in Mariana, Minas Gerais, Brazil, Brachiaria decumbens Stapf. is the main grass in pasturelands affected by the mining tailings. The aim of this study was to investigate the reason for this fact as well as to determine the ecophysiological effects of mining tailings on B. decumbens and to...
Article
Soil organic carbon (SOC) contents are commonly high in the mountainous tropical soils with wet climates in Southeastern and Southern Brazil, but high SOC soils in the Brazilian semiarid zone are poorly known. The Borborema Plateau represent a complex core of folded and uplifted crystalline rocks with the highest altitudes in the Brazilian semiarid...
Article
Carbonate-rich soils are found in different materials, climates, and environments, and are generally characterized by alkaline pH values and high base saturation, dominated by exchangeable Ca²⁺. Fernando de Noronha and Trindade volcanic islands, in South Atlantic, register carbonate-rich soils on bioclastic sediments at coastal areas. This study ai...
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The Brazilian territory has a very extensive coastline, with more than 7500 km, and the largest and complex fluvio-marine archipelago on the planet, centred by Marajó Island, located in the Amazon River mouth, representing a key area for long-term sustainable management of coastal resources under threat of ongoing climate changes. Our study carried...
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The main objective of this paper is to predict soil attributes in unsampled areas using geostatistical models, By improving the prediction parameters of selected data, using environmental covariates characteristic of Antarctic ice free areas. In this study, 58 soil samples from a grid were collected at 0-10 cm depth in Keller Peninsula, King George...
Article
The Iron Quadrangle (IQ) in Brazil is one of the world's largest reserves of iron ore, and besides its economic importance, the region also plays a key role in nature conservation with the endemic Campo Rupestre vegetation. Despite a large number of protected areas (PAs) offering refuge for the remaining Campo Rupestre vegetation in the IQ, studies...
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ABSTRACT Leaf-cutting ants are the most important herbivore in the neotropics, represent active agents of pedobioturbation, and are regarded as ecosystem engineers. These ants have a wide variety of ecological functions, such as pollination, seed dispersal, and tree-growing control. Despite this importance, little is known on their distribution in...
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Whale bones are very abundant at coastal sites across the Admiralty Bay, King George Island, Antarctica, since whale hunting was common in the beginning of the XX century. Since then, these bones became suitable substrate and true oasis for many mosses and lichenized fungi, but their number is dramatically changing in the coastal zones, due to the...
Preprint
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Geophysical sensors combined with machine learning algorithms have been used to understand the pedosphere system, landscape processes and to model soil attributes. In this research, we used parent material, terrain attributes and data from geophysical sensors in different combinations, to test and compare different and novel machine learning algori...
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Little is known about the geochemical baseline of Antarctic soils in different environments. We investigated the soil geochemistry of the two main landscape units of Harmony Point (Nelson Island, Maritime Antarctica): the coastal domain and the upper platform. Fourteen soil samples (seven in each landscape unit) were divided according to depth (hA...
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We evaluated the fungal diversity associated with carbonate veins and two types of salt encrustation in rocks in a polar desert region of continental Antarctica using DNA a metabarcoding approach. We detected 262,268 reads grouped into 517 amplicon sequence variants (ASVs) assigned to the phyla Ascomycota, Basidiomycota, Mortierellomycota and Mucor...
Article
Volcanic oceanic islands host soils that may hold important paleo-environmental proxies, based on vegetation and faunal evidences coupled with pedological and geomorphological indicators. In this regard, the main Brazilian oceanic island of Fernando de Noronha (FNI) still lacks a deeper and more complete analysis of its climatic history and soil ev...
Article
Micropedology studies by description of scanning electron microscopy images and electron micropobre analysis combined with field soil description, mineralogical, physical, and chemical laboratory analyses, can furnish valuable information about soil genesis in polar regions. The present study was carried out at Lions Rump (King George Island, Marit...
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A depressão do Pantanal está sujeita à inundação anual, alagando a maior parte da planície e criando enorme heterogeneidade de unidades da paisagem ou de geoambientes. O Pantanal do Abobral é uma sub-região que compõe o Pantanal. O estudo teve como objetivo caracterizar as unidades ambientais do Pantanal do Abobral, utilizando-se de atributos físic...
Article
The Atlantic forest is one of the most threatened tropical forest ecosystem in the world, and despite current knowledge, its ability to recover structure and diversity after a disturbance is still a matter of debate. Quantifying carbon stocks and species diversity in forests at different successional stages and assessing their recovery capacity is...
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The pedological studies carried out so far in Trindade Island (TI) have obtained patchy evidences of allophane, without detailed mineralogical and micromorphological studies to confirm the occurrence of Andosols in TI. Therefore, in this study, the mineralogical, micromorphological, physical and chemical characterization of four soil profiles from...
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Introduction: Studies on how the altitudinal gradient determines community composition and structure in tropical high altitude grasslands are limited. Objective: To evaluate the plant community composition and structure and their relationship with altitude and soil properties along an altitudinal gradient of three granitic rocky outcrops at the Ser...
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We evaluated the diversity and distribution of viable fungi present in permafrost and active layers obtained from three islands of Maritime Antarctica. A total of 213 fungal isolates were recovered from the permafrost, and 351 from the active layer, which were identified in 58 taxa; 27 from permafrost and 31 from the active layer. Oidiodendron, Pen...
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On November 2015, Samarco tailings dam in Mariana MG, Brazil, collapsed, releasing 62 million tons of tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although being the worst environmental disaster in Brazil, little is known about consequences to aquatic biota. Here we evaluate the effects of the tailings mudflow on...
Preprint
Full-text available
On November 2015, Samarco tailings dam in Mariana MG, Brazil, collapsed, releasing 62 million tons of tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although being the worst environmental disaster in Brazil, little is known about consequences to aquatic biota. Here we evaluate the effects of the tailings mudflow on...
Article
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From the mid-20th century onwards, there has been significant growing interest in understanding the dynamics of vegetation in response to the climatic changes of the Last Glacial Maximum (LGM, 18 thousand years ago). In this context, landscapes may be the result of recent environmental changes or relics from even more remote times, and this may eve...
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The geochemical behavior of the major, minor, trace and rare earths elements (REEs) in soil profiles from ultramafic volcanoclastic rocks of the Vulcão do Paredão and Morro Vermelho Formation from Trindade Island (TI) was analyzed in this study. Losses and gains of chemical elements were calculated through the mass balance for two profiles along th...
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This study aimed to test two hypotheses: i) on the Brazilian semiarid territory, the climate has greater weight as a driver of vegetation than the soil and; ii) the arboreal Caatinga is a vegetation whose environmental attributes are similar to the Dry Forest, in terms of soil and climate attributes. We analyzed attributes of the superficial horizo...
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Tropical forests store large amounts of carbon and high biodiversity, but are being degraded at alarming rates. The emerging global Forest and Landscape Restoration (FLR) agenda seeks to limit global climate change by removing carbon dioxide from the atmosphere through the growth of trees. In doing so, it may also protect biodiversity as a free co‐...
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The micromorphology of deeply weathered soils (Ferralsols/Latossolos) from the Central Plateau of Brazil remains little studied, and its affiliation to different parent materials, poorly known. To clarify the processes of soil formation of these acric, gibbsitic, Fe-oxide rich Ferralsols, three lithotoposequences on local ultrabasic to basic intrus...
Chapter
Adverse conditions on the Antarctic continent, such as fluctuations in temperature and humidity, intense solar radiation, and nutrient deficiency make rock surfaces inhospitable habitats for microorganisms. Antarctica has considerable geological diversity and includes the presence of all types of igneous, metamorphic, and sedimentary rocks. Most ge...
Chapter
The Antarctic continent represents one of the most primal environments in the world. The fungal communities found in this region are complex and have the ability to survive under extreme conditions of dehydration, frequent freeze-thaw cycles, low nutrient concentration, low temperatures, and high exposure to ultraviolet radiation. Current studies o...
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Fungi are cosmopolitan organisms capable of colonising different types of soils in different ecosystems of the planet. Soils represent the main source of isolation of fungi studied in Antarctica, in which different species ranging from endemic to cosmopolitan species adapted to the cold are found. Despite the extreme conditions, different types of...
Article
p>Landscape approaches are prominent in current policy debates about how to achieve ecological, economic and social sustainability. These approaches assess local social-ecological contexts to plan adaptive management and often include indigenous peoples and local communities (IPLC). An important aim of landscape approaches is to integrate different...
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Little is known about the groundwater recharge potential of weathered tropical catchments, where increasing water uptake is widespread to meet various water demands. This study aimed to estimate the volume of groundwater recharge of the Doce River Basin, Minas Gerais, Brazil. The BALSEQ model was applied to calculate the water balance over a period...
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The Iron Quadrangle (IQ) region in Minas Gerais is remarkably geobiodiverse, despite a long history of anthropogenic pressures such as mining and urbanization, but still lacks detailed studies on the distribution of its remaining native vegetation in different substrates. In this study, we utilized Advanced Spaceborne Thermal Emission and Reflectio...
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Este estudo caracterizou a matéria orgânica dos solos (MOS) da Ilha da Trindade a partir das suas frações húmicas e organização micromorfológica, buscando reconhecer a influência de aspectos ambientais na distribuição destas frações. Foram analisados oito perfis de solos, representativos das distintas classes existentes na Ilha (Neossolos, Cambisso...
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Although the physical environment of the Atlantic Forest realm is well known, studies on the soil-landform relationships are fundamental to improve the management of soil resources to facilitate sustainable development. The purpose of this study was to evaluate a representative topossequence on the "Mares de Morros" landscape of deeply weathered re...
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The present study evaluated the influence of the hydraulic gradient on soil conductivity changes using data from permeability tests performed in a column percolation test system, in order to represent geoenvironmental engineering applications. A mature residual soil from gneiss, pedologically classified as Red-Yellow Latosol, with 67% of clay, 10%...
Article
The aim of this work is to produce a simplified vegetation map of ice-free areas of the Fildes Peninsula (FP) and Ardley Island (AI) thought object-oriented classification using a QuickBird satellite image and to evaluate the influence of the global solar radiation (GSR) over the vegetation distribution. The vegetation data were generated from mult...
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Biogeochemical cycling is essential to establish and maintain plant and animal communities. Litter is one of main compartments of this cycle, and the kinetics of leaf decomposition in forest litter depend on the chemical composition and environmental conditions. This study evaluated the effect of leaf composition and environmental conditions on lea...
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Currently, the Brazilian savanna (Cerrado) represents the main agricultural area of the country, comprising a great variety of landscapes and soils, geological formations and vegetation patterns, as well as the major watershed. We studied the hydropedology and morphometry of a representative catchment (Frutal river), on a high tableland (Chapada) i...
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The pattern of variation in soil and landform properties in relation to environmental covariates are closely related to soil type distribution. The aim of this study was to apply digital soil mapping techniques to analysis of the pattern of soil property variation in relation to environmental covariates under periglacial conditions at Keller Penins...
Article
A agrobiodiversidade engloba toda diversidade biológica manejada pelos agricultores/as para produção agrícola, seus saberes e práticas ancestrais associados. Neste trabalho, investigou-se a agrobiodiversidade e suas implicações na soberania alimentar de diferentes comunidades tradicionais do norte mineiro, utilizando os quintais como foco de estudo...
Conference Paper
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Introdução - Cada vez mais estudos em áreas periglaciais buscam compreender como se desenvolve os processos de intemperismo químico associado a áreas de pinguineira na Antártica. O acúmulo do guano é o principal processo de aporte de matéria orgânica do continente. Ainda existem várias lacunas nos processos de gênese e sistemas de transformação em...
Conference Paper
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Introdução-A Amazônia Legal (AML) é uma área administrativa de 5 x 10 6 km 2 , cujo o domínio pedológico são os Latossolos e Argissolos. As grandes dimensões territoriais e dificuldade de acesso limitam estudos pedológicos em escala regional e procedimentos estatísticos tornam-se alternativas apropriadas. O estudo de solos em grandes áreas necessit...
Article
The main relief units from the dry valley of Edson Hills, Ellsworth Mountains, Antarctica (79°49′12.4″/83°40′16.1″), were assessed, emphasizing the analysis of soil and landform interplay. Soil morphological, physical, and chemical properties; salinity; surface boulder weathering (frequency and feature); classification; and weathering stages were a...
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Objetivou-se determinar a capacidade máxima de adsorção de As(V) na forma de HAsO 4 2-(CMAAs) pela fração argila de solos em diferentes ambientes nas Penínsulas Keller e Barton, Ilha Rei George, Antártica Marítima. Foram realizadas análises química e granulométrica na terra fina seca ao ar, e na fração argila quantificou-se o material amorfo e a CM...
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p>A agrobiodiversidade engloba toda diversidade biológica manejada pelos agricultores/as para produção agrícola, seus saberes e práticas ancestrais associados. Neste trabalho, investigou-se a agrobiodiversidade e suas implicações na soberania alimentar de diferentes comunidades tradicionais do norte mineiro, utilizando os quintais como foco de estu...
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Quilombolas are Afro-brazilian rural peasants who descended from escaped slaves who tried to carve out territories of autonomy (called Quilombos) by collective organization and resistance. Despite many anthropological and ethnopedological studies, little research has been carried out to identify the agricultural practices and the knowledge of peopl...
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Se estimó la superficie específica (SE) de muestras de suelos mediante el método de adsorción de nitrógeno a 78 K, y se la relacionó con la capacidad de retención hídrica (RH), el contenido de arcilla, la capacidad de intercambio catiónico efectiva (CIC), y la cantidad de agua retenida sobre la superficie expuesta del suelo, en una aproximación de...
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Soil bulk density (ρ b) data are needed for a wide range of environmental studies. However, ρ b is rarely reported in soil surveys. An alternative to obtain ρ b for data-scarce regions, such as the Rio Doce basin in southeastern Brazil, is indirect estimation from less costly covari-ates using pedotransfer functions (PTF). This study primarily aims...
Article
Tropical forests are critical for protecting global biodiversity and carbon stores. While forest degradation and fragmentation cause negative impacts on trees, many woody lianas benefit, with associated negative effects on carbon storage. Here, we focus on the key question of how abiotic environmental changes resulting from tropical forest fragment...
Chapter
Most Rupestrian Grasslands are associated with the more resistant and prominent rocks in the landscape (quartzites and itabirites). However, there is little knowledge on the ecological importance of water and near-surface temperature regime to this peculiar vegetation, as well as their relationship with the soil and environmental importance. We cha...
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“Campinaranas” are sandy ecosystems of great extension in the Brazilian Amazon, and are determinant for the great systems of rivers with black waters. Due to the lack of studies on this ecosystem, the objective of the present work was to study the distribution of “Campinaranas” and their relationship with the predominant soils and geology in the we...
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The dynamics of organic matter influences the main chemical, physical and biological processes in soil, and often determines their chemical behavior and fertility. Therefore, it is essential to quantify the frac- tions that make up the organic matter to the understanding of pedogenic processes that reflect or induce soil properties. The aim of the...
Article
The accumulation and spatial distribution of arsenic and phosphorus in the As-hyperaccumulator fern Pityrogramma calomelanos were investigated by micro-energy dispersive X-ray fluorescence spectrometry (μ-EDXRF). Ferns were grown in half-strength Hoagland nutrient solution without and with 1.0, 10 or 30 × 10-3 mol L-1 As during three weeks. Microch...
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The climate change phenomena have been influencing terrestrial and glacial ecosystems around the planet. Maritime Antarctica is especially sensitive to these climate variations and over the last 50 years increasing global air temperatures have caused extensive glacial retreat. The objective of this study is to evaluate the potential use of the SAR...
Data
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Due to continued machinery, soil mobilization has caused considerable changes in both soil bulk density (physical attributes) and organic C content, risking crop yield reduction and negative environmental effects. In this context, this work aimed at assessing changes in both physical attributes and in organic C content of a Argissolo Vermelho-Amare...
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RESUMONeste trabalho, estudou-se a influência do diâmetro e do número de camadas do corpo de prova nas curvas de compactação de laboratório e na resistência mecânica de dois solos residuais de gnaisse da Zona da Mata Norte de Minas Gerais, respectivamente, de texturas argilo-areno-siltosa (Solo 1) e areno-silto-argilosa (Solo 2), com vistas à const...
Conference Paper
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RESUMO: A microfluorescência de raios-X por dispersão de energia (μ-EDX) é uma técnica de grande potencial para análises rápidas e não destrutivas de elementos químicos em solos e materiais vegetais. Para a análise quantitativa, vários pré-requisitos devem ser atendidos, dentre eles a espessura ou a massa por área (MA) mínima da amostra analisada....
Conference Paper
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RESUMO: Durante os eventos metamórficos podem haver alterações e reorganização dos componentes dando origem a novos minerais (como o zircão), além de haver troca de materiais entre as rochas em contato. Objetivou-se determinar algum elemento químico marcador de processos de metamorfismo, em saprolitos de contato gnaisse e diabásio, por análise em μ...
Chapter
The Brazilian oceanic islands are privileged places for studying unique landforms, evolved under an active tectonic setting, and humid to semi-arid climates of marine influence. The main landform aspects of the two main islands (Fernando de Noronha and Trindade) are presented, showing the importance of volcanic activity at hot spots, with older eve...
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We aimed to isolate biosurfactant-producing bacteria in high salt conditions from uncontaminated soils on the Brazilian oceanic island, Trindade. Blood agar medium was used for the isolation of presumptive biosurfactant-producing bacteria. Confirmation and measurements of biosurfactant production were made using an oil-spreading method. The isolate...
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To guide the planning and management of protected areas in a consistent and efficient manner, a solid knowledge of the various strata or geoenvironments is essential. In this study we identified, characterized and mapped the geoenvironmental units at the Caminho dos Gerais State Park, located in southeastern Brazil, to enhance the knowledge on t...
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Antarctic soils occur in restricted areas, but few integrated studies on soils and landforms have focused in the Antarctic Peninsula. We studied the representative soils of Hope Bay, emphasizing the processes of quaternary sedimentation, landforms, soil classification, and distribution. Results show that landforms and soils are closely associated i...
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O presente trabalho buscou identificar, resgatar e valorizar os saberes tradicionais sobre o solo e os agroambientes, estabelecendo uma articulação destes saberes com o conhecimento científico de cunho acadêmico. Para isso, realizou-se uma estratificação dos ambientes do território quilombola de Brejo dos Crioulos, com base em critérios locais e pe...