Jesús M. TorresUniversity of Vigo | UVIGO · Department of Applied Physics
Jesús M. Torres
Doctor of Physic
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55
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584
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Citations since 2017
Publications
Publications (55)
Fin whales and sei whales are two migratory baleen whale species sighted every year across the waters of the Azores. Improved understanding of the ecological niche and habitat requirements of these baleen whales is needed to identify persistent or predictable oceanographic events that may set the time of their migration, as well as local or ephemer...
The Earth-observation based products are in the CoastObs portal: https://coastobs.lizard.net. Login details to the portal will be provided after finalising the CoastObs training materials: https://coastobs.eu/e-training
Products in the portal include demonstration products of the following parameters:
Basic products:
Chl-a
Suspended matter
Turbi...
This work presents new prediction models based on recent developments in machine learning methods, such as Random Forest (RF) and AdaBoost, and compares them with more classical approaches, i.e., support vector machines (SVMs) and neural networks (NNs). The models predict Pseudo-nitzschia spp. blooms in the Galician Rias Baixas. This work builds on...
Surface waters are a fundamental resource. They fulfil key function in global biogeochemical cycles and are core to our water, food and energy security. The rapidly increasing rate of data collection from different Earth observation (EO) missions suitable for observing water bodies has promoted satellite remote sensing (RS) as a more widely recogni...
Harmful Algae Blooms (HABs) in the Rias Baixas area (Galicia) cause a strong ecological and economic impact, since they can even force the closure of the rafts production areas for mollusc culture. In this work, we introduce a method for detection and monitoring of HABs in Galicia based on the analysis of map products derived from optical satellite...
Blue whales are sighted every year around the Azores islands, which apparently provide an important seasonal foraging area. In this study we aim to characterize habitat preferences and analyse the temporal distribution of blue whales around São Miguel Island. To do so, we applied Generalized Additive Models to a seven-year opportunistic cetacean oc...
The NW coast of the Iberian Peninsula is dominated by extensive shellfish farming, which places this region as a world leader in mussel production. Harmful algal blooms in the area frequent lead to lengthy harvesting closures threatening food security. This study developed a framework for the detection of Pseudo-nitzschia blooms in the Galician ria...
Evaluation of Sentinel-2 and -3 water quality products over European coastal and transitional waters, including chlorophyll-a, seagrass density, primary productivity, phytoplankton size classes, and harmful algal bloom detection.
Blue whales are sighted every year around the Azores islands, which apparently provide an important seasonal foraging area. In this paper we aim to characterize habitat preferences and analyze the temporal distribution of blue whales around São Miguel Island. To do so, we applied Generalized Additive Models to an opportunistic cetacean occurrence d...
9.1. Introducción .9.2. Telemetría: seguimiento por satélite de plataformas de transmisión 9.2.1. El sistema ARGOS 9.2.2. Sistemas GPS + GSM 9.2.3. El segmento de las PTT ’s 9.2.4. Aprovechamiento de sinergias entre los sistemas de observación 9.3. Seguimiento de fauna marina 9.3.1. Cetáceos 9.3.2. Pinnipedos (focas y leones marinos) 9.3.3. Tortuga...
The development and validation of remote-sensing-based approaches for the
retrieval of chromophoric dissolved organic matter (CDOM) concentrations requires a comprehensive understanding of
the sources and magnitude of variability in the optical properties of
dissolved material within lakes. In this study, spatial and seasonal
variability in concent...
The development and validation of remote sensing-based approaches for the retrieval of CDOM concentrations requires a comprehensive understanding of the sources and magnitude of variability in the optical properties of dissolved material within lakes. In this study, spatial and seasonal variability in concentration and composition of CDOM and the o...
This work illustrates, for first time, the use of simple and low-cost electroanalytical techniques to monitoring
the heavy metals in microalgae cultures. The conditions of both selected techniques for the analysis, differential pulse polarography (DPP) and anodic stripping voltammetry (ASV) were optimized, giving selective and sensitive information...
Every year great baleen whales appear around Azores archipelago. We have analyzed data registered from whale watching platforms off São Miguel since 2008 to 2014. We recorded 7597 sightings of 21 different species, and of those, 643 were baleen whales. Blue whale (Balaenoptera musculus) has been the third most sighted baleen whale (95 sightings), a...
La red de investigación BIOAUGA: BIORREMEDIACIÓN DE AGUAS DULCES CONTAMINADAS (BIOAUGA) está formada por un total de 13 grupos, pertenecientes a las tres universidades gallegas con sede en las cuatro provincias, en los campus de Ourense, Lugo, Coruña, Santiago de Compostela y Vigo. BIOAUGA pretende ser un nexo de unión entre distintos grupos, que b...
El control de contaminantes antropogénicos es un reto prioritario en la conservación del medio ambiente, sobre todo si se piensa en salvaguardar el recurso hidrológico para las generaciones venideras. Sin embargo, es un recurso extremadamente mal gestionado por las innumerables fuentes de contaminación, las cuales alteran las propiedades del mismo,...
http://www.frontiersin.org/10.3389/conf.FMARS.2014.02.00047/event_abstract
Marine oil spills can be highly dangerous given
that the wind, waves and currents can scatter an oil spill
over a wide area within just a few hours in the open sea.
Remote sensing can effectively be used for detecting and
monitoring of oil spills. Optical sensors provide important
information for oil spill contingency planning. Remote
sensing techn...
The Common dolphin (Delphinus delphis) is one of the resident species of cetaceans in the Azores. The aim of this study is to look for intra and interannual differences in the temporal and spatial distribution of common dolphins. This is the first step to better understand the distribution of this species according to environmental features. The co...
Phytoplanktonic blooms in the coastal embayments (rias) at the NW part of Spain were mentioned for the first time in 1918 and since then they have been associated numerous times with negatives impacts to a very important economic activity in the area, mussel production. In this study, eight years of Pseudo-nitzschia spp. abundance and associated me...
The Atlantic spotted dolphin (Stenella frontalis) is one of the seasonal species sighted every year in the Azores. We aim to analyze its distribution using data collected between 2009 and 2011 off the south coast of São Miguel during whale watching tours. The Atlantic spotted dolphin was the fourth most sighted species in this study, making up 12.4...
Biofuel production from microalgae can be both sustainable and economically viable. Particularly in the case of algal growth in wastewater an extra benefit is the removal or biotransformation of pollutants from these types of waters. A continuous monitoring system of the microalgae status and the concentration of different wastewater contaminants c...
In typical case 2 waters an accurate remote sensing retrieval of
chlorophyll a (chla) is still challenging. There is a widespread
understanding that universally applicable water constituent retrieval
algorithms are currently not feasible, shifting the research focus to
regionally specific implementations of powerful inversion methods. This
study ta...
Sightings of sperm whales increase in summer due to the increasing number of trips and to the presence of family groups in the area.-75.2% of the sightings were recorded between 700 and 1300 m, according to the distribution of their main prey.-May sightings agree with the preferences of depth and slope finding for the rest of the year, but they wer...
The Ria de Vigo (northwest Spain) is a coastal inlet strongly influenced by the processes of coastal upwelling and downwelling on the adjacent continental shelf, which in their turn have an effect on the productivity and the cultivation of mussels on this area. Chlorophyll and sea surface temperature (SST) data from satellite (MERIS, MODIS or (A)AT...
The Galician coastal waters are highly productive with an abundant fishing that plays an important role in the economy of the region. The phytoplankton is the basis of the trofic chain in the oceans and its abundance is a good index to estimate the productivity. The phytoplankton concentration can be estimated by using remote sensing tools through...
off the south coast of São Miguel, Azores. Distribution and abundance of cetaceans are directly related with biological, anthropogenic and physical factors. They influence the ecosystem productivity and therefore the distribution of every level of the food chain. For marine mammals, the distribution of their preys is considered to be an important f...
This study takes advantage of a regionally specific algorithm and the characteristics of Medium Resolution Imaging Spectrometer (MERIS) in order to deliver more accurate, detailed chlorophyll a (chla) maps of optically complex coastal waters during an upwelling cycle. MERIS full resolution chla concentrations and in situ data were obtained on the G...
The spatial and seasonal distribution of cetaceans and possible links with environmental conditions were studied at the Galician
continental shelf. Data were collected between February–August 2001 and June–September 2003 during opportunistic surveys onboard
fishing boats. Seven species of cetaceans were identified from 250 sightings of 6,846 indivi...
In typical Case 2 waters, accurate remote sensing retrieval of chlorophyll a (chla) is still a challenging task. In this study, focusing on the Galician rias (ΝW Spain), algorithms based on neural network (NN) techniques were developed for the retrieval of chla concentration in optically complex waters, using Medium Resolution Imaging Spectrometer...
An innovative optical method for remote monitoring of water pollution was developed and tested in AMPERA ERA-NET Programme, project DEOSOM. The method is based on remote detection of laser-induced fluorescent radiation (LIF LIDAR). In the project, compact and light LIF LIDAR systems were developed, which can be operated by relatively unskilled pers...
Since mid-2003, systematic monthly sightings surveys for cetaceans have been carried out in Galicia (north-west Spain) from observation points around the coastline, with the aim of providing baseline data on cetacean distribution and habitat use to underpin future conservation measures. Here we summarize results for September 2003 to October 2007....
In this study an neural network-based algorithm was developed in the framework of the projects "PROFIT-PGIDIT07REM014E" and "INCITE 2007 FIT120000-2007-137" in collaboration with the Fishing Vessel Owners' Cooperative of the Port of Vigo (ARVI) in order to predict and optimize the fishing vessels route. Data were provided from six fishing ships ope...
7. Vertidos de hidrocarburos.J. M. Torres, L. González-Vilas, G. Navarro y J. Pérez-Marrero
7.1.Introducción
7.2. Sensores utilizados para la detección de hidrocarburos
7.3. Detección de vertidos mediante imágenes SAR
7.4. Detección de vertidos mediante radiómetros
7.5. Sistemas automáticos de detección de vertidos a partir de imágenes SAR
7.5...
In this paper, winter hydrography and dynamics off western Galicia is described combining on board and satellite measurements during downwelling season. In upper waters (0-50 m), four features have been distinguished by their different physical properties, being from coast to ocean: a local upwelling near Cape Silleiro originated by divergence of c...
A hybrid neuro-symbolic problem solving model is presented in which the aim is to forecast parameters of a complex and dynamic
environment in an unsupervised way. In situations in which the rules that determine a system are unknown, the prediction of
the parameter values that determine the characteristic behaviour of the system can be a problematic...
The main trouble of oil spill detection systems based on synthetic aperture radar image is the discrimination of true oil slicks from other surface phenomena giving a similar signature. Most of these systems consist of three main stages: dark areas detection, features extraction and classification. The aim of this work is to improve the classificat...
Space‐borne synthetic aperture radar has been proven to be a useful tool for ocean oil spill monitoring due to its large coverage, independence of the day–night cycle and all‐weather capability. In this paper, a method for oil spill detection based on a visual interpretation was applied to two consecutive Advanced Synthetic Aperture Radar (ASAR) im...
The surface circulation off the western coast of the Iberian Peninsula is strongly influenced by the atmospheric pressure distribution in the North Atlantic. During the winter season, the combination of the onshore Ekman transport and the geostrophic adjustment of the large-scale oceanic zonal flow causes the appearance of a seasonal poleward along...
Periodic blooms of Pseudonitzschia spp. in Galicien coastal areas have caused virtual collapse of ecosystems with accomp anying serious economic impacts. The aim of this work is the study of the physical environment of a coastal system correlating different bands of MERIS data with in situ chlorophyll data provided by the Marine Environment Quality...
The shelf of Galicia, holds one of the most important communities of cetaceans of the whole Spanish
coast. Although in the last years have been developed important studies related with diverse aspects of
the biology of the cetaceans of these waters, most of them were based exclusively on information related
to strandings, and the studies of populat...
A hybrid neuro-symbolic problem solving model is presented in which the aim is to forecast parameters of a complex and dynamic
environment in an unsupervised way. In situations in which the rules that determine a system are unknown, the prediction of
the parameter values that determine the characteristic behaviour of the system can be a problematic...
A hybrid neuro-symbolic problem solving model is presentedin which the aim is to forecast parameters of a complex and dynamicenvironment in an unsupervised way. In situations in which the rulesthat determine a system are unknown, the prediction of the parametervalues that determine the characteristic behaviour of the system can be aproblematic task...
The Atlantic coast of Iberian Peninsula offers an excellent opportunity for a study of upwelling filaments and their importance in lateral exchanges of nutrient and biota. Simultaneous acquisition SeaWIFS (Sea Viewing Wide Field Sensor) and AVHRR (Advanced Very High Resolution Radiometer) NOAA imagery of the north-west of the Iberian Margin were ob...
El afloramiento oceánico del Atlántico Este tiene gran importancia en la estructura económica de la zona costera atlántica de la Península Ibérica, debido a que estos eventos regulan las pesquerías de sardinas en nuestras costas. También tienen relación con la aparición o no de mareas rojas (desarrollo de algas tóxicas), que tienen un efecto direct...
En este artículo proponemos una red neuronal para llevar a cabo una clasificación supervisada de imágenes multiespectrales. Adicionalmente, como una extensión de la arquitectura básica veremos que la información sobre textura puede ser integrada dentro del clasificador sin una definición explícita de la misma. Variantes de la regla delta generaliza...
La capacidad multiespectral de los sensores AVHRR de los satélites NOAA más recientes permiten el cálculo muy preciso de las temperaturas superficiales del mar (SST), pero la resolución espacial de estos datos (cada píxel corresponde aproximadamente a un cuadrado de 1.1 km de arista) es insuficiente para el estudio de muchos fenómenos de interés en...
In typical case 2 waters an accurate remote sensing retrieval of chlorophyll a (chla) is still challeng-ing. There is a widespread understanding that universally applicable water constituent retrieval al-gorithms are currently not feasible, shifting the research focus to regionally specific implementa-tions of powerful inversion methods. In this st...
An European project has been carried out (from January 01 to August 01) under the title "Pelagic fisheries in Scotland (UK) and Galicia (Spain): observer studies to collect fishery data and monitor by-catches of small cetaceans". In Galicia, these studies provide an opportunity to evaluate the success of the multi-task observer protocols for collec...
Projects
Projects (4)
Invitation to submit:
We would like to invite authors to submit their works on innovative methods and applications using remote sensing data to study the temporal and/or spatial distribution of marine organisms, including seagrass, phytoplankton, fish, or marine mammals. Potential topics include but are not necessarily limited to:
- Integration of marine remote sensing data and species distribution models;
- Identification of key environmental factors for distribution of marine species;
- Assessments of marine biodiversity and/or habitat conditions;
- Development and application of short- or long-term prediction models of marine species;
- Mapping of seagrass meadows or coral reefs;
- Analysis of time series of species distributions based on historical remote sensing data;
- Evaluation of the status of fish stocks.
CoastObs is an EU H2020 funded project that aims at using satellite remote sensing to monitor coastal water environments and to develop a user-relevant platform that can offer validated products to users including monitoring of seagrass and macroalgae, phytoplankton size classes, primary production, and harmful algae as well as higher level products such as indicators and integration with predictive models.
