J. Gago

J. Gago
Instituto Español de Oceanografia | IEO · Centro Oceanográfico de Vigo

Ph.D.

About

94
Publications
89,416
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
2,837
Citations
Citations since 2017
48 Research Items
2282 Citations
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
Introduction
I´m researcher in oceanography at IEO, scientific coordinator of national and EU projects in the field of marine environment. I lead the team working in marine litter at IEO. Focal point for the MSFD process in descriptor 10 (marine litter) at the spanish Ministry of Environment. Member of the GES/ TG Marine Litter (2012-actual) and the UNEP/MEDPOL expert Group on Marine litter ( 2014-2015) and invited (as chair,...) to meetings on marine litter at national and international level.
Additional affiliations
January 2008 - present
Instituto Español de Oceanografia
Position
  • Senior Researcher

Publications

Publications (94)
Article
Full-text available
Little is known about pollutant concentrations in marine remote areas such as the Porcupine Bank in the NE Atlantic Ocean. Remote locations are much less studied than the more readily accessible coastal areas, nevertheless, are of great importance both to unveil how far human influence has reached and, are more challenging, to infer background conc...
Article
Full-text available
The trophic ecology of European hake (Merluccius merluccius) larvae and early‐juveniles from the Iberian shelf off Galicia (NW Spain) are assessed by means of stable isotopes (SIA) and nutritional condition in conjunction with hydrobiological variations observed during the winter and summer season of 2012. Hake early‐juveniles (18–47 mm SL) showed...
Article
Microplastic occurrence in marine biota has been reported in a wide range of animals, from marine mammals and seabirds to invertebrates. Commercial and shallow-water fish have been the subject of numerous works on microplastic ingestion, given their importance in human diet and accessibility. However, little is known about microlitter occurrence in...
Poster
Full-text available
Twitter, with more than 330 million monthly active users worldwide, is an invaluable source for studying environmental and social concerns. Here, we present an exploratory data analysis of a one-year (July 20- July 21) dataset of ~229K tweets containing the words ‘plastic’ or ‘microplastic’ in reference to the marine environment. Understanding what...
Article
Full-text available
Plastic litter dispersed in the different environmental compartments represents one of the most concerning problems associated with human activities. Specifically, plastic particles in the micro and nano size scale are ubiquitous and represent a threat to human health and the environment. In the last few decades, a huge amount of research has been...
Article
Marine litter is an emerging environmental problem. In this study, micro and mesoplastics were determined for the first time in seawater in Ría de Vigo (Spain) identifying their concentration, annual cycle, size, shape and polymer composition. Besides, temporal variations at an annual scale were also established. The Ría de Vigo is well known for t...
Article
Few studies have mined social media platforms to assess environmental concerns. In this study, Twitter was scraped to obtain a ~140,000 tweet dataset related specifically to marine plastic pollution. The goal is to understand what kind of users profiles are tweeting and how and when they do it. In addition, topic modelling and graph theory techniqu...
Article
The accumulation of plastic waste in estuaries is growing due to the increase in their use in daily life and their inadequate treatment on wastewater plants (WWTPs). Hydrodynamic and particle-tracking models were validated and used to improve the knowledge about the distribution and concentration of microplastics released by WWTPs in the Ria de Vig...
Article
Tobacco is a well-documented threat to human health. However, its environmental impact has only recently been considered. Metals can interact with cigarette butts (CBs) being transported in the marine environment and reaching organisms. To understand this mechanism, a series of metal(loid)s were analyzed in cigarette filters (virgin, artificially s...
Article
In this work two sensitive areas of the Spanish coast located in the Atlantic (Ria de Vigo) and Mediterranean (Mar Menor lagoon) have been studied regarding their contamination by phthalates, organotin compounds and per-polyfluoroalkyl substances (seawater and sediments) in two different campaigns (spring and autumn in 2015). PFAS and OTCs were det...
Article
Full-text available
One of the most widespread aquatic organisms in the rivers and estuarine ecosystems, in the world, is Asian clam Corbiculafluminea. This clam, that can adapt to environmental changes, is an invasive species in several areas and it was adopted as a model for toxicity tests. This study evaluated the effects of the exposure to cadmium (Cd), to micropl...
Article
Microplastics are gaining worldwide attention due to their omnipresence. The marine environment is one of the most affected systems; especially the sediment compartment. Microplastic separation from the sediment matrix is the first step to evaluate its abundance and availability. Nevertheless, a lack of consistency in extraction protocols is a fact...
Article
Microplastics (<5 mm; MPs) are globally recognized as an issue of emerging concern in the marine environment. In this study, MPs were determined for the first time in sediments from Rías Baixas and Miño river shelf, to show the baseline contamination levels. The Rías is well known for its intense fishing and shellfish harvesting activities. The sam...
Chapter
Full-text available
Microplastics pollution of terrestrial and marine environmental compartments is an issue of concern worldwide, but information on the key sources, pathways, distribution, and impacts is still scarce in many cases, fragmentary at best, and typically difficult to compare owing to a lack of harmonization in methodologies. In this chapter, we present t...
Article
We evaluated the incidence of microplastics in the digestive tract contents of four fish species: Engraulis en-crasicolus, Sardina pilchardus, Callionymus lyra and Mullus surmuletus. Alkaline digestion (10% KOH) was used to degrade the organic matter. The percentage of fish with microplastics was 78% (88% fibres, 12% fragments). The main types of p...
Article
The near-surface transport of exogenous plastics that enter the Bay of Biscay near Cape Ortegal (NW Spain), the main coastal entrance of marine litter into this semi-enclosed sea, were analyzed using a particle tracking model over the period 2009–2018. Four wind drag coefficients were considered to account for the different windages due to the dive...
Research
Supplement: Model Verification regarding the paper "Observations and idealized modelling of microplastic transport in estuaries: The exemplary case of an upwelling system (Ría de Vigo, NW Spain)" https://doi.org/10.1016/j.marchem.2020.103780
Article
Microplastics (MPs) are an environmental problem of growing concern, and several studies have defined the Bay of Biscay (BoB) as a marine litter accumulation area. To address the abundance of MPs in this region, a critical overview is presented compiling the research performed to date on the different water bodies, sediments and biota. The comparat...
Article
Full-text available
We investigated the presence of microplastics and other anthropogenic litter in the sediments adhered to rocks of an Arctic freshwater lake at Ny-Ålesund (Svalbard Archipelago, 78°N; 11°E). Most of the sampled microparticles were fibers (>90%). The identification of polymer types and additives was performed by combining three spectroscopic techniqu...
Article
Microplastics (MPs) pollution in marine environments has received considerable attention over the past two decades due to the increased awareness of its potential risks to ecosystems. Numerical simulations can be used to provide estimates of MPs fate and distribution, but so far this approach has been largely applied to the open ocean. In this work...
Article
Full-text available
Seabed litter of the Flemish Pass area (NW Atlantic Ocean) was analysed and described using data from the EU-Spain groundfish survey (2006-2017 period). This study presents baseline information on seabed litter in this area. The Flemish Pass is located in areas beyond national jurisdiction within the Northwest Atlantic Fisheries Organization Regula...
Article
Full-text available
Dinoflagellate species of Dinophysis are obligate mixotrophs that require light, nutrients, and prey for sustained growth. Information about their nitrogenous nutrient preferences and their uptake kinetics are scarce. This study aimed to determine the preferred nitrogen sources in cultures of D. acuminata and D. acuta strains from the Galician Rías...
Article
Full-text available
Microplastic content (MPs) in mussels (Mytilus spp.) from two areas of the north coast of Spain was measured for the first time. Additionally, a comparison of microplastic levels observed in mussels digested with nitric acid and with potassium hydroxide was carried out. The average microplastic concentration in mussels digested with nitric acid was...
Article
Plastic debris is found in nearly all marine regions and is a known threat to marine biota. This study evaluates the ingestion of plastic marine debris (macro and micro plastics) by a piscivorous predator, Alepisaurus ferox Lowe (1833). A total of 27 specimens were captured in 2015 and 2016 in the North Atlantic (around 34º–36º N and 10º–16º W) and...
Article
In this study, we assessed plastic accumulation in marine sediments due to finfish aquaculture using floating net-pens. We studied plastic concentrations around three fish farms located at the Mediterranean coastline of Spain. The macroplastic categories and abundances were determined by video monitoring, detecting the majority of elements (78%), i...
Article
Full-text available
Microplastics (MPs) are widely recognised as a contaminant of emerging concern in the marine environment. This work provides original data of the presence of MPs in coastal sediments along the Spanish Mediterranean continental shelf. Ten surface sediment samples were collected in order to document baseline microplastic distribution from Algeciras t...
Article
Here we summarize the overarching issues that emerged from a workshop held to discuss scientific challenges and future directions on the use of numerical models to predict the amount, distribution and effects of plastic pollution on marine ecosystems. The need for multidisciplinary approaches, standardized protocols for plastic quantification and a...
Technical Report
Full-text available
Microplastic pollution is presently considered a high concern topic by scientists, policy makers, governmental bodies, non-governmental organizations and the general public. Microplastics are highly widespread in all environmental compartments (e.g. air, water, sediments and biota) and increasing empirical evidence points towards potential negative...
Article
Plastic debris is currently recognised as one of the major global threats to marine life. However, few data exist on the presence and abundance of microplastics (plastics < 5 mm in size) in marine mammals. This is the first record of the presence of microplastics in the digestive tracts of marine mammals from the Iberian Peninsula. This study made...
Poster
Full-text available
Microplastic content in mussels (Mytilus sp.) from the Ria of Vigo and the coast of the Cantabrian Sea was measured. Additionally, with the aim of comparing the use of acid and alkaline compounds as digestive agents, a comparison of microplastic levels observed in mussels digested with nitric acid and with potassium hydroxide was carried out. The a...
Article
Sardine fisheries in the Iberian Atlantic shelf (36°N–44.5°N) show decadal‐scale cycles. In the late 1990s, a positive phase in sardine stock was expected; on the contrary, catches have declined until now. Regime shifts in climatic and oceanographic variables on different scales (as forcing factor) and shifts in sardine stock (as result) have been...
Article
Floating marine debris is distributed worldwide through the oceans and poses a serious threat to marine ecosystems. Field data and model results show high concentrations of floating debris in the Bay of Biscay. In this work, the Regional Ocean Modelling System (ROMS), in conjunction with a particle-tracking model, has been used to study the distrib...
Poster
Full-text available
Seabed litter of the Flemish Pass was spatially analyzed and described using data from the EU-Spain groundfish survey (NAFO Div 3L, outside the Canadian EEZ) in the 2006-2017 period. Flemish Pass is a channel of ~1,200 m deep which separates Flemish Cap offshore Bank and the Grand Banks of Newfoundland. It is an Area Beyond National Jurisdiction (A...
Technical Report
Full-text available
Marine anthropogenic litter has long been recognised as an emerging pollutant of global concern. Its ubiquitous distribution and its direct and indirect impacts on aquatic ecosystems, marine fauna and local economies have been recently highlighted by several studies and international organisations around the world. Although comprised of different m...
Article
Predicting the transport of marine floating litter requires a detailed understanding of the processes involved in the dispersion of floating materials in the ocean. The restraining effect of a near-coastal boundary or shallow bottom topography may affect the drift response to local wind forcing. The aim of this work is to develop a particle-trackin...
Article
The objective of this review is to summarize information on microfibers in seawater and sediments from available scientific information. Microfibers were found in all reviewed documents. An heterogeneous approach is observed, with regard to sampling methodologies and units. Microfibers in sediments range from 1.4 to 40 items per 50 mL or 13.15 to 3...
Article
Full-text available
The incidence of cetacean strandings is expected to depend on a combination of factors, including the distribution and abundance of the cetaceans, their prey, and causes of mortality (e.g. natural, fishery bycatch), as well as currents and winds which affect whether carcasses reach the shore. We investigated spatiotemporal patterns and trends in th...
Technical Report
Full-text available
Marine litter is a global problem causing harm to marine wildlife, coastal communities and maritime activities. It also embodies an emerging concern for human health and safety. The reduction of marine litter pollution poses a complex challenge for humankind, requiring adjustments in human behaviour as well as in the different phases of the lifecyc...
Article
Full-text available
Microplastic litter is a pervasive pollutant present in marine systems across the globe. The legacy of microplastics pollution in the marine environment today may remain for years to come due to the persistence of these materials. Microplastics are emerging contaminants of potential concern and as yet there are few recognized approaches for monitor...
Conference Paper
Full-text available
In Galicia, NW Spain, a stranding network run by the non-governmental organisation CEMMA since 1990. The common dolphin (Delphinus delphis) is the most frequently stranded cetacean and a total of more than 2600 common dolphins has been recorded on the 25 years that the stranding network has been operational. Most marine debris (composed mainly of p...
Data
Full-text available
In Galicia, NW Spain, a stranding network run by the non-governmental organisation CEMMA since 1990. The common dolphin (Delphinus delphis) is the most frequently stranded cetacean and a total of more than 2600 common dolphins has been recorded on the 25 years that the stranding network has been operational. Most marine debris (composed mainly of p...
Conference Paper
Full-text available
El objetivo de las Estrategias Marinas es permitir el uso sostenible del medio marino mediante la gestión de las actividades y presiones humanas siguiendo un enfoque ecosistémico. La evaluación del estado de conservación de las especies marinas y su monitorización para determinar si alcanza el Buen Estado Ambiental (BEA) son sus pilares básicos. Pa...
Article
Full-text available
The input of new nitrogen into the euphotic zone constrains the export of organic carbon to the deep ocean and thereby the biologically mediated long-term CO2 exchange between the ocean and atmosphere. In low-latitude open-ocean regions, turbulence-driven nitrate diffusion from the ocean's interior and biological fixation of atmospheric N2 are the...
Article
Full-text available
The composition and structure of the larval fish community (LFC) in the NW Iberian upwelling system in late winter 2012 were examined, and the influence of abiotic and biotic factors on the horizontal distribution of fish larvae and on the horizontal structure of the LFC was investigated. The LFC, composed of 62 taxa (59 species and 3 genera) in 28...
Research
Full-text available
Observations of floating micro- and macroplasticdebris, in the Open Ocean & LMEs, were compiled from reliable published sources.
Article
Full-text available
The vertical distribution and vertical migrations of fish larvae and implications for their cross-shelf distribution were investigated in the northern limit of the NE Atlantic upwelling region during the late winter mixing period of 2012. The average positive values of the upwelling index for February and March of this year were far from normal, al...
Presentation
Full-text available
Presentation of the IMPACTA PROJECT in CICTA congress 2015. This project was funded by Spanish Ministry of Economy and by EU (CTM2013-48194-C3)
Data
Full-text available
The present document is the Executive Summary of the “Guidance on Monitoring of Marine Litter in European Seas”, the output of the work of the TSG-ML between 2012 and 2013. The objective of such Guidance is to provide MS with recommendations and information needed to commence the monitoring of the MSFD Descriptor 10. It describes specific protocols...
Conference Paper
Full-text available
The upwelling index (UI) has been used extensively to characterize the spatial and temporal variability of the upwelling of the NW Iberian Peninsula. There are many examples in the bibliography that use their capabilities to catch the variability of processes of different origin as physical, chemical and biological. The classic UI calculation metho...
Conference Paper
Full-text available
Strandings provide valuable information on the presence and relative abundance of cetaceans in an area. The spatial, inter-annual and seasonal variation in the number of strandings may reflect the variability in cetacean abundance. However, this signal can be masked by other factors which are responsible both for the mortality of the dolphins and t...
Article
Full-text available
The aim of this note is to discuss the relevance of the interaction/integration of monitoring of contaminants for the protection of the marine environment and for human health safety (descriptors 8 and 9, respectively) within the Marine Strategy Framework Directive (MSFD). The identification of possible relations between contaminant levels in sedim...
Conference Paper
Full-text available
Single-species models have been commonly used to assess fish stocks in the past. Since these models have relatively simple data requirements, they sometimes provide the only tool available to assess the status of a stock when data are not enough to develop more complex models. However, these models have been criticized for several reasons since the...
Article
Full-text available
In order to assess the situation of beach litter on the Galician coast (NW Spain), we conducted a seasonal series of sampling on three beaches: A Lanzada, Baldaio and O Rostro. A total of 79 surveys were conducted from 2001 to 2010 on a stretch of 100 m and a stretch of 1 km. A total of 37862 beach litter items were counted and classified on the 10...
Article
Full-text available
A tool for the evaluation/calculation of Upwelling Index (UI) in the North West Iberian Upwelling System (NW IUS) was developed. To evaluate the upwelling indices of the application from the Fleet Numerical Meteorology and Oceanography Center database (UIFNMOC) a comparison analysis with the historical series (UIH) traditionally used in the area an...
Book
Full-text available
The MSFD Technical Subgroup on Marine Litter was tasked to deliver guidance so that European Member States could initiate programmes for monitoring of Descriptor 10 of the MSFD. The present document provides the recommendations and information needed to commence the monitoring required for marine litter, including methodological protocols and categ...
Article
A suite of relevant trace metals (Hg, Pb, Cd, Cu, Zn and Ni) was measured in surface sediment samples to assess the environmental situation of the largest two Atlantic Spanish 'rías' (a form of estuaries, ría of Pontevedra, ROP, and ría of Vigo, ROV). The level of contamination originated by these metals was assessed against international guideline...