A5086088751- Geology and Paleoclimatology Research
- Polar Research and Ecology
- Climate change and permafrost
- Plant Water Relations and Carbon Dynamics
- Remote Sensing and LiDAR Applications
- 3D Surveying and Cultural Heritage
- Soil Carbon and Nitrogen Dynamics
- Atmospheric and Environmental Gas Dynamics
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- Cryospheric studies and observations
- Marine and coastal plant biology
- Tree-ring climate responses
- Geographic Information Systems Studies
- Horticultural and Viticultural Research
- Paleontology and Stratigraphy of Fossils
- Isotope Analysis in Ecology
- Cephalopods and Marine Biology
- Soil Geostatistics and Mapping
Universidade Federal de Viçosa
2016-2022
Abstract The oxygen stable isotope composition ( δ 18 O) of CO 2 is a valuable tool for studying the gas exchange between terrestrial ecosystems and atmosphere. In soil, it records isotopic signal water pools subjected to precipitation evaporation events. O surface soil net flux dominated by physical processes diffusion into out chemical reactions during –H equilibration. Catalytic enzyme carbonic anhydrase, reducing hydration times, have been proposed recently explain field observations...
The flux (R(s)) and carbon isotopic composition (delta(13)C (Rs)) of soil respired CO (2) was measured every 2 h over the course three diel cycles in a Mediterranean oak woodland, together with measurements delta(13)C leaf, root organic matter (SOM)) metabolites. Simulations R(s) (Rs) were also made using numerical model parameterised SOM data assuming short-term production rates driven mainly by temperature. Average values study period within range metabolite average (SOM) values, but...
High resolution topography (HRT) surveys is an important tool to model landscapes, especially in zones subjected strong environmental changes, such as Antarctica, where landform highly influenced by cryoclasty and permafrost melting. The aim of this work was obtain a high accurate DTM for Keller Peninsula, Maritime Antarctica. survey study assessed the 2014/2015 2015/2016 during austral summer, using Terrestrial Laser Scanner (TLS). In order cover 8 km² TLS equipment installed 81 different...
The main objective of this paper is to predict soil attributes in unsampled areas using geostatistical models, By improving the prediction parameters selected data, environmental covariates characteristic Antarctic ice free areas. In study, 58 samples from a grid were collected at 0-10 cm depth Keller Peninsula, King George Island, Antarctica. chemical analysis was performed, and values potassium, calcium magnesium determined for each sampled. Simple kriging (SK) Random Forest interpolator...