Jonathan Escobar- Doctor of remote sensing
- Professor (Full) at National Polytechnic Institute
Jonathan Escobar
- Doctor of remote sensing
- Professor (Full) at National Polytechnic Institute
Instituto Politécnico Nacional
About
89
Publications
25,733
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
134
Citations
Introduction
Skills and Expertise
Current institution
Additional affiliations
IPN
Publications
Publications (89)
A model for rapid detection of coastal mangrove cover was devised. The idea is that it can
be applied by users with basic knowledge of remote sensing and GIS. The model is based on
calculating the principal components (PC) from bands corresponding to the visible, near infrared,
and shortwave infrared regions in Landsat Level‐2 images. The model was...
Objetive:This research analyzed the interactions between humans and bears in the ejidos of the Sierra de Zápaliname Natural Reserve and the urban area of Saltillo, Coahuila, Mexico. Design/Methodology/Approach: A database of approximately 481 georeferenced records of Human-Black Bear Interactions (HBI) for the year 2021 was used. Based on these rec...
Este estudio propone una alternativa para el aprovechamiento no extractivo del Oso Negro en la Reserva Natural Sierra de Zápaliname de Saltillo Coahuila. Para delimitar las areas potenciales para la fotografía de Oso Negro se utilizó una base de datos de aproximadamente 481 registros de ocurrencia georeferenciados que se utilizaron en conjunto con...
In this investigation, three abandoned mine tail-ings were detected with Worldview2 imagery. The location of these tailings was confirmed with multispectral images obtained by an unmanned aerial vehicle. Quantification of heavy metals cadmium (Cd) and lead (Pb), as well as the metalloid arsenic (As) was performed on these tailings and 13 other site...
The United Nations World Tourism Organization has stated that Mexico is the sixth most visited country, with nearly 40 million international tourists. However, tourism can be one of the key contributors to rapid urbanization, contributing to climate change and environmental impacts. One of the tourist areas with the highest urban growth in the Mexi...
The Sierra Madre Occidental (SMO) is the largest mountain range in Mexico, spanning nearly 1,400 km from northwest to southeast. It is a region of high ecological complexity, yet, few attempts at ecoregionalization are available. Using Maxent and five high-resolution (30 m) physiographic layers, we generated niche models for 33 species of small, no...
Tree growth models describe the growth and development of forest ecosystems by considering how the dimensions of each simulated tree change within a certain time. These models have commonly used three growth parameters that describe various biological processes and behaviours, considering a sigmoid growth function: (i) the upper asymptote (θ1), whi...
RESUMEN Se utilizó un drone ANAFI que contiene un sensor térmico FLIR para obtener valores de temperatura reflejada en areas verdes (AV) de la ciudad de Durango localizados en fraccionamientos privados y de interés social. El objetivo de estos vuelos fue analizar la temperatura reflejada por especie de árboles y de toda el area de la AV. En cada AV...
RESUMEN El aumento de la temperatura global representa una amenaza importante para la biodiversidad mundial por los efectos que tiene en la fisiología, fenología, comportamiento y distribución de las especies. Actualmente, la temperatura en algunas playas de anidación de tortugas marinas supera los rangos de incubación óptimos para los embriones, p...
En México, la recolecta de escamoles a partir de la hormiga Liometopum apiculatum (Mayr) beneficia económicamente a los habitantes de comunidades rurales en áreas de bajo nivel socioeconómico y condiciones agroecológicas limitantes. Lo anterior ha propiciado de forma paulatina que las actividades agropecuarias aumenten el área de intervención para...
Among the Mexican trees, Picea (spruce) is the genus with the stronger boreal affinity. There are three species in Mexico, all of them paleoendemic, relic from the Holocene: Picea chihuahuana (in Chihuahua and Durango), P. martinezii (Nuevo Leon), and P. mexicana (Coahuila and Chihuahua). Spruces in Mexico have high ecological value for being part...
Among the Mexican trees, Picea (spruce) is the genus with the stronger boreal affinity.
There are three species in Mexico, all of them paleoendemic, relic from the Holocene:
Picea chihuahuana (in Chihuahua and Durango), P. martinezii (Nuevo Leon), and P.
mexicana (Coahuila and Chihuahua). Spruces in Mexico have high ecological value
for being part...
We used four artificial intelligence algorithms; MaxEnt, climate space model (CSM), back propagation neural network (BPNN) and vector support machine (VSM) to model the potential distribution of Agave durangensis. In the field, 300 georeferenced records of agaves were obtained, for which information on 18 climates and three topographic variables wa...
In this study, six supervised classifcation algorithms were compared. The algorithms were based on cluster analysis, distance,
deep learning, and object-based image analysis. Our objective was to determine which of these algorithms has the highest
overall accuracy in both detection and automated estimation of agave cover in a given area to help gro...
A workshop about "Cambios demográficos, reproducción y estatus de poblaciones naturales de Picea mexicana Martínez y Picea martinezii Patterson en México: especies susceptibles a eventos de variabilidad climática”
https://www.researchgate.net/project/Cambios-demograficos-reproduccion-y-estatus-de-poblaciones-naturales-de-Picea-mexicana-Martinez-y-P...
Objective: The objective was to infer the effect of the variables phenology (migration-non-migration), seasonality (rainfall-dry season), sex and forest condition on the abundances of birds (resident-migratory) in a semi-preserved and disturbed oak pine forest. Design/Methodology/Approach: The study was carried out in Monte Tlaloc, Estado de México...
Objetivo: Analizar la topografía de una isla del Golfo de California, México, mediante modelos digitales de elevación (DEM) de 30 m de resolución espacial para generar el primer modelo de distribución potencial para el carnívoro endémico Bassariscus astutus saxicola. Diseño/Metodología/Enfoque: Se empleó el software Maxent para modelar la distribuc...
In this study, six supervised classification algorithms were compared. The algorithms were based on cluster analysis, distance, deep learning and object-based image analysis. Our objective was to determine which of these algorithms has the highest overall accuracy in both detection and automated estimation of agave cover in a given area to help gro...
In this work, we present a hybrid methodology based on ADA, applied to the simulation of pine species from northern Mexico. From algebraic transformations and certain premises, we were able to reduce the parameter space of the Weibull growth function from three parameters to just one, the maximum diameter of the individual at the end of growth. Fro...
By means of a Parrot ANAFI UAV, we obtained 8,000 images with a spatial resolution of 1.40 cm along 30 km of a nesting beach of Lepidochelys olivacea. The images were used to construct orthomosaics for the detection of turtle shells using object-based image analysis. Four attributes describing the shapes of the shells were obtained from the process...
In this work, we present a hybrid methodology based on the ADA methodology, applied to the simulation of pine species from northern Mexico. From algebraic transformations and certain premises, we were able to reduce the parameter space of the Weibull growth function from 3 parameters to just 1, the maximum diameter of the individual at the end of g...
The purpose of the current study is to use UAVS to study sea turtle nesting. Orthomosaics with 1.47-cm resolution were generated over line 40 km long by 80 meters wide of the sites Lepidochelys olivacea nesting grounds on a beach south of Sinaloa, Mexico.
Wetlands are very important ecosystems, since they provide flood protection and pollutant dilution services, and harbor important habitats for birds and other wildlife. Monitoring their water surface area is therefore important for understanding a wetland area’s hydrological processes and for managing its water resources. The aim of this study were...
Objective: to determine the distribution of D. viscosa in the vicinity of the Guadalupe Victoria Dam in Durango, Mexico, for the years 1990, 2010 and 2017. Design/Methodology/Approach: Landsat satellite images were processed in order to carry out supervised classifications using an artificial neural network. Images from the years 1990, 2010 and 201...
Background and Objective: The ecophysiological relationship between reproductive parameters and environmental variables is mostly unknown in wild temperate species of small rodents, inhabiting mid-latitude, temperate forests. Here the goal was the relationship between testicular function, testes and body weight to seasonal variations of daylight le...
norte del país.
Los objetivos de esta investigación fueron: 1) la detección de cuerpos de agua en la SMO utilizando imágenes de satélite Sentinel-2 de alta resolución espacial, y 2) la realización de un inventario de los cuerpos de agua en los diferentes tipos de vegetación presentes en tal sierra. En esta investigación se utilizaron 120 imágenes d...
Most potential habitat models have been built from WorldClim using low resolution variables, even for areas of high heterogeneity with few weather stations. The resulting models can be too general and lead to erroneous decisions when used for conservation purposes. Sciurus aberti is a tree squirrel inhabiting highlands in the SW US and the Sierra M...
The present research carried out a topographic and climatic analysis
of a relict forest of Pinus monophylla detected in an isolated moun�
tain of Baja California, using Sentinel-2 satellite images. Topographic
and climatic evaluation were carried out by means of a principal com�
ponents analysis, where four topographic variables related to the es...
Growth models are tools that allow, for example, represent wood production in a certain period of time, to obtain precise forecasts to determine productivity, depending on the silvicultural treatments, climatic variables, soil characteristics, etc. Durango has one of the main forest reserves in Mexico, mainly of pine species. However, in logging ar...
En la década de 2000, las aeronaves piloteadas a distancia (RPA) se utilizaron especialmente para intereses militares, pero desde 2010 se han aplicado en la conservación, gestión e investigación de la vida silvestre. A pesar del gran potencial de los RPA, pocas investigaciones lo han utilizado para el estudio en tortugas marinas. El objetivo de est...
Background
Forest residues can be a feasible alternative for converting energy into fuels, electricity, or heat. Compared to other second-generation bioenergy sources, they do not compete for food, are relatively cheap, abundant in forest-rich areas, and more importantly their energy balance is close to zero. Biomass estimations can help design ene...
Se aplicaron técnicas de percepción remota y sistemas de información geográfica en dos etapas para obtener variables del hábitat relevantes para los cerdos silvestres en la región meridional del estado de Baja California Sur. Por medio de un Modelo Digital de Elevación (MDE) se obtuvieron las variables topográficas: pendiente, orientación de ladera...
In Mexico, the genus Pinus represents the most economically important forest resource in temperate zones. However, anthropogenic and biological factors can cause loss of genetic diversity within the genus. In this study, three indices of genetic diversity (v2, %Poly, DW) were determined in 14 populations of Pinus arizonica Engelm. located in the st...
Objective: Determine steroid hormones in wild bighorn sheep feces cimarrón (Ovis canadensis) using a non-invasive method.
Design/methodology/approach: Progestogens, androgens and estradiol were measured in the feces of wild bighorn sheep living in the Sierra San Felipe mountains in Baja California in the winter, spring and summer of 2007. The stero...
Objetivo: Determinación de hormonas esteroides en heces de borrego cimarrón silvestre mediante un método no invasivo. Diseño / metodología / enfoque: En este estudio se detectaron progestágenos, andrógenos y estradiol en heces de borrego cimarrón silvestres que habitan en la Sierra San Felipe en Baja California, durante la primavera, invierno y ver...
The body temperature of the Santa Catalina Island rattlesnake (Crotalus catalinensis) is reported for the first time. C. catalinensis presented a broad range of body temperature (13.6 °C - 38.2 °C ; X - = 25.9 °C; N = 65). The interval substrate temperature associated with the snakes is between 14.8 °C and 37.9 °C, while the ambient temperature ran...
In arid ecosystems, desert bighorn sheep are dependent on natural waterholes, particularly in summer when forage is scarce and environmental temperatures are high. To detect waterholes in Sierra Santa Isabel, which is the largest area of desert bighorn sheep habitat in the state of Baja California, Mexico, we used the normalized difference vegetati...
Excel spreadsheet with database of terrain escape from VRM.
(XLSX)
Records of wildlife in the waterholes.
(PDF)
Excel spreadsheet with database of NDWI from Sentinel-2.
(XLSX)
Excel spreadsheet with database of NDVI from Sentinel-2.
(XLSX)
Flowchart representing the processing of satellite images and calculations of the NDVI and NDWI.
(TIF)
Plants identified at the periphery of waterholes detected in the Sierra Santa Isabel, Baja California.
(PDF)
Background. The Californian single-leaf pinyon (Pinus monophylla var. californiarum), a subspecies of the single-leaf pinyon (the world's only 1-needled pine), inhabits semi-arid zones of the Mojave Desert (southern Nevada and southeastern California, US) and also of northern Baja California (Mexico). This tree is distributed as a relict subspecies...
Background. The Californian single-leaf pinyon ( Pinus monophylla var. californiarum ), a subspecies of the single-leaf pinyon (the world's only 1-needled pine), inhabits semi-arid zones of the Mojave Desert (southern Nevada and southeastern California, US) and also of northern Baja California (Mexico). This subspecies is distributed as a relict in...
Background. The Californian single-leaf pinyon ( Pinus monophylla var. californiarum ), a subspecies of the single-leaf pinyon (the world's only 1-needled pine), inhabits semi-arid zones of the Mojave Desert (southern Nevada and southeastern California, US) and also of northern Baja California (Mexico). This subspecies is distributed as a relict in...
Background. The Californian single-leaf pinyon ( Pinus monophylla var. californiarum ), a subspecies of the single-leaf pinyon (the world's only 1-needled pine), inhabits semi-arid zones of the Mojave Desert (southern Nevada and southeastern California, US) and also of northern Baja California (Mexico). This subspecies is distributed as a relict in...
Background. The Californian single-leaf pinyon ( Pinus monophylla var. californiarum ), a subspecies of the single-leaf pinyon (the world's only 1-needled pine), inhabits semi-arid zones of the Mojave Desert (southern Nevada and southeastern California, US) and also of northern Baja California (Mexico). This subspecies is distributed as a relict in...
Background. The Californian single-leaf pinyon ( Pinus monophylla var. californiarum ), a subspecies of the single-leaf pinyon (the world's only 1-needled pine), inhabits semi-arid zones of the Mojave Desert (southern Nevada and southeastern California, US) and also of northern Baja California (Mexico). This subspecies is distributed as a relict in...
Background. The Californian single-leaf pinyon ( Pinus monophylla var. californiarum ), a subspecies of the single-leaf pinyon (the world's only 1-needled pine), inhabits semi-arid zones of the Mojave Desert in southern Nevada and southeastern California (US) and also of northern Baja California (Mexico). This subspecies is distributed as a relict...
The Californian single-leaf pinyon ( Pinus monophylla var. californiarum ), a subspecies of the single-leaf pinyon (the world's only 1-needled pine), inhabits semi-arid zones of the Mojave Desert in southern Nevada and southeastern California (US) and also of northern Baja California (Mexico). This subspecies is distributed as a relict in the geogr...
The Mexican giant cardon (Pachycereus pringlei (S.Watson) Britton & Rose) is an endemic species of the Sonoran Desert; these immense cacti serve as reservoirs of water and nutrients and provide food and shelter for a large diversity of wildlife. The objectives of the study were to identify the number of species that currently interact with cardons...
The Mexican giant cardon (Pachycereus pringlei (S.Watson) Britton & Rose) is an endemic species of the Sonoran Desert; these immense cacti serve as reservoirs of water and nutrients and provide food and shelter for a large diversity of wildlife. The objectives of the study were to identify the number of species that currently interact with cardons...
The vegetation cover is a rainfall regulator on its way to the ground. Once rainfall is intercepted, the flow of water under the canopy (incidental) and through the branches and trunks (stemflow) are the net precipitation. Net precipitation is the main source of water that supplies the hydrological cycle. The current research presents a model to es...
The desert bighorn sheep is adapted to the extreme conditions of arid ecosystems. The amount and distribution of watering holes is an essential component of the habitat of this species. With information provided by people in Sierra Santa Isabel a database of potential sites watering sites was obtained, which was taken as reference of spectral infor...
The desert bighorn sheep is adapted to the extreme conditions of arid ecosystems. The amount and distribution of watering holes is an essential component of the habitat of this species. With information provided by people in Sierra Santa Isabel a database of potential sites watering sites was obtained, which was taken as reference of spectral infor...
The mule deer (Odocoileus hemionus; Rafinasque, 1817) is the principal mammal exploited through hunting in Baja California, México. Despite its economic and cultural importance, there are no evaluations of the availability and use of water currents, which are one of the main components in the habitat of arid ecosystems. Through photo-trapping the u...
RESUMEN Se propone una técnica nueva de fototrampeo para contabilizar e identificar insectos y reptiles, considerando que con las técnicas y equipo convencionales no suelen ser registrados por la limitada capacidad que tienen las lentes para enfocar animales pequeños y cercanos o detectar sus sutiles movimientos. La técnica permite registrar a los...
The kit fox (Vulpes macrotis) lives in sandy and shallow soils of the Pacific coastal plains and the ecoregion of San Felipe desert. The reports of this species are scarce and in Mexico it is listed as a threatened species. The populations of V. macrotis tend to decrease due to the change in the habitat to agricultural land, which has been one of t...
The assessment bighorn habitat is essential to determine the distribution and the number of individuals who can support an area. In this research satellite remote sensing techniques were used to analyse availability, use and habitat selection carried out by the bighorn sheep in Sierra Santa Isabel. The study used three essential components: water,...
We report the presence of the Band-tailed Pigeon, which was not previously recorded in the Sonoran Desert in Baja California. The site was 140 km south of the nearest forest. The presence of the pigeon further documents the propensity of Band-tailed Pigeons to wander widely.
Water used by bighorn sheep during the 2011 and 2013 dry seasons and the rainy season and drought of 2015 in the Sierra Santa Isabel of the State of Baja California, Mexico was analyzed for seven physicochemical parameters. At four watering sites, 260 photographs of sheep were obtained. Females, yearlings, and lambs accounted for 73% of the photogr...
Introduction: Escape terrain and vegetation cover are two vital components in bighorn sheep habitat use.
Understanding these components is essential for conserving and managing this species. Despite the importance of
assessing habitat use, there are few studies in Mexico and most efforts have focused on population surveys. The lack
of studies of bi...
INTRODUCCIÓN:
El terreno de escape y la cobertura vegetal son dos componentes vitales en el hábitat del borrego cimarrón. La evaluación de la selección que hacen los borregos cimarrones de estos componentes es fundamental para determinar su distribución y el número de organismos que puede soportar un área. A pesar de la importancia de evaluar la se...
We provide information on recent records of the 2 subspecies of striped skunk occurring in the north- eastern (Mephitis mephitis estor) and northwestern (M. m. holzneri) region of Baja California, Mexico. Most of the recent records for these subspecies come from valleys and suburban zones.
Aportamos registros recientes para las dos subespecies del...
The Roseate Spoonbill (Platalea ajaja) is an extremely rare visitor in the Baja California Peninsula but even more in the bay of La Paz, Baja California Sur. For some authors, this bird is considered a sporadic summer visitor of the Colorado River Delta region and a casual visitor of California. The Roseate Spoonbill was first recorded in the Chame...
The Baja California peninsula is an area of considerable interest for ecological
investigations and conservation efforts. It supports a wide variety of marine and terrestrial
fauna, including bighorn sheep (Ovis canadensis ssp.). Using the Bering land bridge, wild
sheep from Asia entered North America more than 70,000 years ago (Brown 1989). In...
The southern grasshopper mouse is charac-terized by small size and a tail shorter than the head and body length (McCarty 1975). Onycho -mys torridus is distributed from southern Canada to northern Mexico (Sonora, Coahuila, Nuevo León & Tamaulipas; Hall 1981). Physio-logical adaptations allow this species to survive in extreme aridity (Schmidt-Niels...
Western spotted skunk (Spilogale gracilis) and ring-tailed cat (Bassariscus astutus) are common and widely distributed along the Baja California peninsula (Hall 1981). However, few records of occurrence in Baja California have been documented during the last 4 decades (cf. Huey 1964). This scarcity of re cords may result from of the narrow and scat...
Western spotted skunk (Spilogale gracilis) and ring-tailed cat (Bassariscus astutus) are common and widely distributed along the Baja California peninsula (Hall 1981). However, few records of occurrence in Baja California have been documented during the last 4 decades (cf. Huey 1964). This scarcity of re cords may result from of the narrow and scat...
Documentamos la extension de ámbito más sureño y nuevos especímenes de a ardilla gris occidental (Sciurus griseus anthonyi) para el Estado de Baja California, México. El espécimen más reciente fue recolectado en el poblado de Cataviña y representa el registro más sureño para la especie y subespecie. Observaciones repetidas de individuos en esta últ...
In this work we determined the proportion of sexes of the bighorn sheep, and also analyzed its spatial and temporal variations, mapping and modeling using generalized linear models in two locations in the Sierra San Felipe (Site 1, the Canyon Moreno, Site 2 Cañada San Felipe). The results for the two locations indicate that there is no spatial vari...
Los mamíferos, en una etapa de su ciclo de vida, adquieren la capacidad de reproducirse previa madurez sexual. Este proceso da inicio en el período juvenil denominado pubertad, que es cuando empiezan a producirse gametos y hormonas-v. gr. esteroides-. Posteriormente, durante la etapa adulta, se establece la madurez sexual por lo que estos individuo...
