Results 1 to 10 of about 300 (120)

A Probabilistic Multi-Source Remote Sensing Approach to Evaluate Extreme Precursory Drought Conditions of a Wildfire Event in Central Chile

Frontiers in Environmental Science, 2022
Forest fires are a major issue worldwide, and especially in Mediterranean ecosystems where the frequency, extension and severity of wildfire events have increased related to longer and more intense droughts.
Roberto O. Chávez, Roberto O. Chávez, Miguel E. Castillo-Soto, Katherine Traipe, Matías Olea, José A. Lastra, Tomás Quiñones   +6 more
doaj   +1 more source

npphen: An R-Package for Detecting and Mapping Extreme Vegetation Anomalies Based on Remotely Sensed Phenological Variability

Remote Sensing, 2022
Monitoring vegetation disturbances using long remote sensing time series is crucial to support environmental management, biodiversity conservation, and adaptation strategies to climate change from global to local scales.
Roberto O. Chávez, Sergio A. Estay, José A. Lastra, Carlos G. Riquelme, Matías Olea, Javiera Aguayo, Mathieu Decuyper   +6 more
doaj   +1 more source

MODIS Time Series Reveal New Maximum Records of Defoliated Area by Ormiscodes amphimone in Deciduous Nothofagus Forests, Southern Chile

Remote Sensing, 2023
Outbreaks of the Ormiscodes amphimone moth are among the largest biotic disturbances in South America, defoliating vast areas of native Nothofagus pumilio forests in the Chilean and Argentinian Patagonia in the last decade.
Sergio A. Estay, Roberto O. Chávez, José A. Lastra, Ronald Rocco, Álvaro G. Gutiérrez, Mathieu Decuyper   +5 more
doaj   +1 more source

A USER-FRIENDLY REMOTE-SENSING WEB-PLATFORM FOR BIODIVERSITY CONSERVATION AND MANAGEMENT IN PROTECTED AREAS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
The Chilean SNASPE is a complex network of 104 protected areas covering 18.5 million hectares of continental and insular Chile in South America.
R. O. Chávez, J. A. Lastra, D. Valencia, I. Díaz-Hormazábal   +3 more
doaj   +1 more source

Snow Cover and Snow Persistence Changes in the Mocho-Choshuenco Volcano (Southern Chile) Derived From 35 Years of Landsat Satellite Images

Frontiers in Ecology and Evolution, 2021
Mountain regions have experienced above-average warming in the 20th century and this trend is likely to continue. These accelerated temperature changes in alpine areas are causing reduced snowfall and changes in the timing of snowfall and melt. Snow is a
Roberto O. Chávez, Verónica F. Briceño, José A. Lastra, Daniel Harris-Pascal, Sergio A. Estay, Sergio A. Estay   +5 more
doaj   +1 more source

Marine turtle hotspots in the Gulf of Mexico and Mesoamerican Reef: Strengthening management and preparedness

Frontiers in Marine Science, 2022
Marine turtles are of the highest ecological concern in terms of conservation and restoration programs and marine territorial ordering. Marine resource-extracting industries have severe negative impacts on their populations and their habitats.
Eduardo Cuevas, Eduardo Cuevas, Eduardo Cuevas, María de los Angeles Liceaga-Correa, Abigail Uribe-Martínez, Abigail Uribe-Martínez, Sandra A. Gallegos-Fernández, Sandra A. Gallegos-Fernández, Félix Moncada-Gavilán, Raúl J. González-Díaz-Mirón, Melania C. López-Castro, Vicente Guzmán-Hernández, Martha López   +12 more
doaj   +1 more source

Analyzing short term spatial and temporal dynamics of water presence at a basin-scale in Mexico using SAR data

GIScience & Remote Sensing, 2020
The dynamic nature of continental water body covers is a main indicator of the status of this ecological capital and its trends on the land surface. With synthetic aperture radar (SAR), various water coverage processes can be identified using satellite ...
Alejandra A. López-Caloca, Felipe Omar Tapia-Silva, Fernando López, Henao Pilar, Aymara O. Ramírez González, Guadalupe Rivera   +5 more
doaj   +1 more source

Percepción de estudiantes de ingeniería sobre la enseñanza remota mediante la estrategia de aula-invertida

Revista Ingenierías Universidad de Medellín, 2021
Este documento reporta los resultados de un estudio de la percepción de los estudiantes sobre la enseñanza remota mediante el método de aula invertida en comparación con dos estrategias de enseñanza-aprendizaje presencial: cátedra clásica y aprendizaje ...
Said Pertuz
doaj   +1 more source

Andean peatlands at risk? Spatiotemporal patterns of extreme NDVI anomalies, water extraction and drought severity in a large-scale mining area of Atacama, northern Chile

International Journal of Applied Earth Observations and Geoinformation, 2023
In the Andes, multiple human and climatic factors threaten the conservation of bofedales, a type of high altitude peat forming wetland widely distributed in the tropical and subtropical Andes.
Roberto O. Chávez, Oliver Meseguer-Ruiz, Matías Olea, Matías Calderón-Seguel, Karina Yager, Rosa Isela Meneses, José A. Lastra, Ignacio Núñez-Hidalgo, Pablo Sarricolea, Roberto Serrano-Notivoli, Manuel Prieto   +10 more
doaj   +1 more source

A Self-Calibrated Non-Parametric Time Series Analysis Approach for Assessing Insect Defoliation of Broad-Leaved Deciduous Nothofagus pumilio Forests

Remote Sensing, 2019
Folivorous insects cause some of the most ecologically and economically important disturbances in forests worldwide. For this reason, several approaches have been developed to exploit the temporal richness of available satellite time series data to ...
Roberto O. Chávez, Ronald Rocco, Álvaro G. Gutiérrez, Marcelo Dörner, Sergio A. Estay   +4 more
doaj   +1 more source