Miguel Ángel Álvarez Vázquez

Miguel Ángel Álvarez Vázquez
University of Vigo | UVIGO · Department of History, Art and Geography

M.Sc. Ph.D.
Post-Doc researcher at University of Vigo (Spain), Area of Physical Gepgraphy

About

62
Publications
6,004
Reads
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152
Citations
Citations since 2016
43 Research Items
148 Citations
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Introduction
M.A. Álvarez-Vázquez, Ph.D. ORCID ID: orcid.org/0000-0003-4446-3499 Scopus Author ID: 55918317200 M.A. Álvarez Vázquez is an environmental scientist (degree in Environmental Sciences, University of León, 2011; “licenciado” leve 7 of the EQF: master degree), MSc. in Advanced Chemistry (University of Vigo, 2012), and PhD. in the International Campus of Excelence Do*Mar (UVigo, 2017). His main research topics focus on water and sediment geochemistry and chemostratigraphy in the fluvial environment, particularly in the interface between the continental and the oceanic domains. Using trace elements and other indicators to qualify and quantify the human imprint in these natural systems.
Additional affiliations
October 2019 - present
University of Vigo
Position
  • PostDoc Position
July 2018 - October 2019
Instituto de Investigaciones Marinas (IIM-CSIC)
Position
  • Laboratory Assistant
May 2015 - May 2018
University of Vigo
Position
  • Recruiter
Education
January 2013 - July 2017
University of Vigo
Field of study
  • PhD. in Marine Science, Technology and Management
September 2012 - July 2013
University of Vigo
Field of study
September 2011 - July 2012
University of Vigo
Field of study

Publications

Publications (62)
Article
An increased concern on environmental issues has arisen in recent decades. Human activities have a great impact on the environment, efficient methodologies being needed for quick assessment of possible contamination sources and their effects. This paper describes a fast method for analysis of sediments by Total Reflection X-ray Fluorescence (TXRF)...
Article
The Anthropocene has been proposed as a new geo-stratigraphic epoch where humans have become a global factor affecting the ecosystems. Estuarine sediments constitute a biogeochemical reservoir where trace elements (TEs) from natural sources mix with a fraction generated by human activities. This study assessed the natural lithogenic imprint of TEs...
Article
This work addresses the study of a sediment core retrieved in the estuary of the Grande-de-Xubia River (Ria of Ferrol), which is among the first industrialized areas in the Iberian Peninsula and has links to the shipbuilding industry since 1750. The chemical analysis of trace elements (i.e. As, Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, V, and Zn) was coupled...
Article
The Umia-Grove Intertidal Complex is located within the Ria of Arousa (NW Iberian Peninsula). Out of its significance for wintering shorebirds it has been included in the Ramsar List of Wetlands of International Importance as well as in international protection networks such as the European Natura 2000 and Important Bird and Biodiversity Areas-Bird...
Article
Full-text available
Bedrock rivers, whose sedimentary geochemistry has been scarcely investigated, are suitable to test geochemical approaches in order to assess the existence and extent of human alterations in the natural abundance of rare earth elements. This work presents the study of REE contents in fine-grained sediments of the (bedrock) Miño River, in an urban r...
Article
The existence of forms sculpted by fluvial erosion is frequent in Bedrock Rivers. Since 1999, the Area of Physical Geography of the University of Vigo (Ourense Campus) has been conducting research on these rock cavities in various reaches of the middle Miño River. The exploratory study that is presented corresponds to the case of a section upstream...
Article
The Miño River is a good example of bedrock rivers, where sediment geochemistry is scarcely studied. Its urban reach when passing through the city of Ourense gathers some characteristics that provide interest to its sediments, like scarcity of fine sediments accumulation and the impact of several human activities. Sediments trapped by potholes and...
Article
Full-text available
The capacity of fluvial potholes to trap sediments, together with the geochemical analysis of their stored sediments for environmental assessment, is an overlooked research topic in small bedrock rivers. The present exploratory study is focused on this issue. It was developed in a small river over rock, in the inland territory of Galicia (NW Iberia...
Article
Industrial revolution induced contamination of lowland rivers and floodplain soils with heavy metals worldwide. This pollution was particularly significant in former coal mining regions where hard coal was utilised in various industrial facilities like coke, iron and steel works. The upper Odra River draining Ostrava Coal District in Czech and Uppe...
Article
A compositional data analysis (CoDA) in fluvial sediments is performed to achieve separation of the geochemical signals (SGS) of grain size, anthropogenic contamination, and possible post-depositional alteration. The SGS is demonstrated and developed in the study of the sediments from the Skalka Reservoir (Czechia) and the floodplain of its tributa...
Article
Full-text available
A gravity core (220 cm depth) was collected to investigate the geochemistry, enrichment, and pollution of trace metals in anoxic sediments from San Simon Bay, an ecosystem of high biological productivity in the northwest of Spain. A five-step sequential extraction procedure was used. The Cu, Pb, and Zn contents decreased with depth, with maximum va...
Chapter
Full-text available
Entre los retos planteados para la enseñanza-aprendizaje en la Educación Superior destaca la necesaria innovación de contenidos y métodos, conectados con problemas que afectan a la sociedad. El objetivo de esta contribución es analizar el interés de una propuesta para promover la alfabetización científica, la adquisición de competencias y la concie...
Article
Full-text available
Los elementos químicos de las tierras raras (REE) se suelen utilizar como trazadores de sedimentos en sistemas costeros. El curso del río Louro está parcialmente situado dentro de la cuenca de drenaje del monte Galiñeiro, que es rico en minerales con REE. Se plantea la hipótesis de que los REE pueden estar presentes en el sedimento del río Louro y...
Article
Full-text available
Purpose Rare earth elements have been used as sediment tracers in river, estuarine and coastal environments but rarely applied as fluvial tributary tracers. Lanthanides (Ln) and yttrium (Y) were quantified in fluvial sediments of the Minho River lower course (NW Iberian Peninsula), where the catchment contains heterogeneous lithologies, to define t...
Article
Scarce research about small European rivers from non-human impacted areas to determine their natural background state has been undertaken. During the annual hydrological cycle of 2008–9 the patterns of particulate supply (SPM, POC, PON, Al, Cd, Co, Cr, Cu, Fe, Ni, Pb, V, Zn) from the rivers Sor, Mera Landro, Lourido and Landoi to the Northern Galic...
Article
Full-text available
Landform assemblages may be used to define sites of geomorphological interest which are resources for rural sustainability. This paper focuses on the valuation and significance of such sites in the context of one European internal border region, illustrated using a case study from the inland mountains of the Spanish-Portuguese border: the Serra do...
Article
The Miño is the most important river in the NW Iberian Peninsula. When it flows through Ourense town (Spain), the attractiveness of the thermal springs hides the importance of the fluvial potholes developed over bedrock. These forms reflect the strength of erosion processes, linked to fluvial incision over time. Potholes have an environmental, dida...
Article
Full-text available
A total of 216 sculpted forms were registered on the granitic bedrock of the Miño River, northwest Iberian Peninsula. Analysis of in situ measurements (length, width and depth) revealed three general type-sets: incipient forms, longitudinal furrows and circular potholes. Maximum depth and upper radius (at the incision surface) were identified as ke...
Article
Trace element contributions from small rivers to estuaries is an issue barely addressed in the literature. In this work, freshwater flowing into the Ria of Cedeira (NW Iberian Peninsula) was studied during a hydrological year through the input from three rivers, one considered uncontaminated (the Das-Mestas River), a second affected by urban treate...
Conference Paper
Full-text available
El curso bajo del río Miño está comprendido entre la presa hidroeléctrica de Frieira y el océano Atlántico, al cual vierte un caudal medio de 413 m3_s-1. En su recorrido de 76 km recibe las aguas de nueve afluentes principales. Uno de ellos es el río Louro que tiene una longitud de 28 km y, siguiendo un régimen pluvial, aporta una media anual de 8,...
Article
Full-text available
The modification of chemical inputs into estuaries/rias by wastewater discharges is poorly documented. Concentrations and fluxes of nutrient salts, organic matter and trace metals in rivers and wastewaters to the mesotrophic Rias of Ortigueira (38 km2) and Viveiro (27 km2), located on the western Cantabrian coast (Bay of Biscay), were evaluated to...
Conference Paper
Full-text available
Las geoformas son elementos sustantivos del patrimonio natural y cultural. Su identificación, caracterización, catalogación, y puesta en valor debe realizarse en el marco de los procesos geomorfológicos dominantes. Nuestro objetivo es presentar los referentes conceptuales y metodológicos a tener en cuenta en las primeras fases de una investigación...
Poster
Full-text available
Las formas de erosión fluvial poseen un carácter de patrimonio natural y cultural. Nuestro objetivo es presentar los referentes conceptuales y metodológicos a tener en cuenta en las primeras fases de una investigación sobre patrimonio geomorfológico en cauces rocosos. El enfoque responde al interés del tema en el contexto del Campus del Agua (Unive...
Conference Paper
Full-text available
ABSTRACT River channels on granite rock are affecting by continuous change linked to the regional structure, the base-level history, the variability of turbulent flows and the discontinuities set. The morphological properties of the forms in these channels show the dynamic pathways from the erosive processes. This work has been developed in a reach...
Presentation
Full-text available
This work has been developed in a reach of the Miño river (Galicia, NW of Iberian Massif). The Miño river flow in Ourense lands on granite rock, with an ENE-WSW general direction, between several residual surfaces (mean elevation 400 m). The Reza station (RS) and the Chavasqueira-Outariz station (CS) are located in a recent level of fluvial erosion...
Presentation
Full-text available
This work has been developed in a reach of the Miño river (Galicia, NW of Iberian Massif). The Miño river flow in Ourense lands on granite rock, with an ENE-WSW general direction, between several residual surfaces (mean elevation 400 m). The Reza station (RS) and the Chavasqueira-Outariz station (CS) are located in a recent level of fluvial erosion...
Conference Paper
Full-text available
In the Galician coast seasonal upwelling is the main nutrient source. Fluvial fluxes of nutrients to the Rias were treated on a few papers and there is not information about the relevance of dams on river loads. We assess the relevance of the dam role drawing a comparison between the fluxes of nutrients and dissolved organic matter (DOM) from the M...
Conference Paper
Full-text available
Concentrations of trace metals found in rivers are derived from a variety of anthropogenic and natural sources. Although river transport is a major mechanism for metal removal from continental land masses, little information is available regarding about the pristine small rivers and how their patterns may vary in contaminated conditions. The aim is...
Data
The northwestern margin of the Iberian Peninsula is a coastal ria system made up of eighteen Galician rias, which has been defined as incised valleys where the estuarine zone can move according to environmental changes [1]. The input of major and trace elements to ria sediments may occur by natural processes through fluvial loads or by plankton fal...
Conference Paper
Full-text available
Rias are incised valleys where the estuarine area can move according to environmental changes; the estuarine zone is a biogeochemical active area where trace elements (TEs) from lithogenic sources are transported by rivers and partially sedimented. There may be also accumulated TEs from anthropogenic origin. The aim of this study is to determine th...
Poster
Full-text available
This work reports the depth variations of As, Cd, Cr, Cu, Ni, Pb, V and Zn concentrations in sediment cores of five rias from the northwestern coast of Galicia, and identifies natural versus anthropogenic footprints characteristics of each system. The Rias of Cedeira, Ferrol, Ares, Betanzos and La-Coruña, located in the northwestern coast of Galici...

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Projects

Projects (2)
Project
Caracterizar as alteracións antropoxénicas nos sistemas continentais naturais (en particular pequenos ríos), considerando compoñentes espazo-temporais, a través de rexistros pasados e actuais, e analizar estas alteracións tendo en conta a súa relación con actividades humanas específicas, a través do uso de indicadores xeneralizables de presión humana.
Archived project
Trace elements are the backbone of this thesis, used as environmental indicators dealing with a three-points main objective: (i) setting appropriate baselines paying attention to the local context in order to identify natural anomalies; to (ii) make an assessment of the environmental quality of the river-ria systems of the northwest of the Iberian Peninsula, as examples of the land-ocean boundary dominated by small rivers; (iii) relating the trace elements, transported by fluvial water or stored in estuarine sediments, with the particular characteristics of the respective fluvial basin.