About
90
Publications
25,788
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
1,015
Citations
Introduction
Current institution
Publications
Publications (90)
Coastal zones are strategic environments of high socioeconomic, political, and ecological value, with over half of the world's population residing within 200 km of the coast. This proximity highlights their vulnerability to extreme events, which are exacerbated by global changes, leading to significant coastal impacts such as erosion, flooding, and...
There is a relative lack of research, targeted models and tools to manage beaches in estuaries and bays (BEBs). Many estuaries and bays have been highly modified and urbanised, for example port developments and coastal revetments. This paper outlines the complications and opportunities for conserving and managing BEBs in modified estuaries. To do t...
Sandy beaches are ever-changing environments, as they experience constant reshaping due to the external forces of tides, waves, and winds. The shoreline position, which marks the boundary between water and sand, holds great significance in the fields of coastal geomorphology, coastal engineering, and coastal management. It is crucial to understand...
Sandy beaches are ever-changing environments, as they experience constant reshaping due to the external forces of tides, waves, and winds. The shoreline position, which marks the boundary between water and sand, holds great significance in the fields of coastal geomorphology, coastal engineering, and coastal management. It is crucial to understand...
Background: Syngnathid fishes (Actinopterygii, Syngnathidae) are flagship species strongly associated with seaweed
and seagrass habitats. Seahorses and pipefishes are highly vulnerable to anthropogenic and environmental
disturbances, but most species are currently Data Deficient according to the IUCN (2019), requiring more biological
and ecological...
Background
Syngnathid fishes (Actinopterygii, Syngnathidae) are flagship species strongly associated with seaweed and seagrass habitats. Seahorses and pipefishes are highly vulnerable to anthropogenic and environmental disturbances, but most species are currently Data Deficient according to the IUCN (2019), requiring more biological and ecological...
Background: Syngnathid fishes (Actinopterygii, Syngnathidae) are flagship species strongly associated with seaweed and seagrass habitats. Seahorses and pipefishes are highly vulnerable to anthropogenic and environmental disturbances, but most species are currently Data Deficient according to the IUCN (IUCN, 2019), requiring more biological and ecol...
Background: Syngnathid fishes (Actinopterygii, Syngnathidae) are flagship species highly associated to seaweed and seagrass habitats of marine ecosystems biodiversity. Seahorses and pipefish are highly vulnerable to anthropogenic and environmental disturbances, but most species are currently Data Defficient by IUCN (IUCN, 2019), requiring more biol...
Background: Syngnathid fishes (Actinopterygii, Syngnathidae) are flagship species strongly associated with seaweed and seagrass habitats. Seahorses and pipefishes are highly vulnerable to anthropogenic and environmental disturbances, but most species are currently Data Deficient according to the IUCN (IUCN, 2019), requiring more biological and ecol...
Evaluation of biogeochemical processes in Anthropocene deep-sea sediments require accurate dating techniques. Here we show the results of an approach using high resolution low level background gamma spectrometry with two simultaneous hyper-pure germanium (HPGe) detectors. The quantitative role of the deepest zones (>3000 m depth) of the Irminger Ba...
This work presents a detailed study of CONTOURIBER and Integrated Ocean Drilling Program 339 sediment data targeting sand-rich contourites in the Eastern Gulf of Cadiz. All of the collected sediments are interpreted as contourites (deposited or reworked by bottom currents) on the basis of oceanographic setting, seismic and morphometric features and...
The 5th Assessment Report of the Intergovernmental Panel on Climatic Change (AR5, IPCC, 2014) suggests that the increase of greenhouse gas emissions from anthropic sources, in the last decades (particularly since 1970), is responsible for the Climate Change. Climate Change has been producing adverse effects on the oceans and coastal areas, such as...
Proyecto basado en el análisis y contraste de ecosistemas diversos marcados por las diferentes condiciones biogeografías y ambientales como son los ecosistemas costeros y marinos Atlánticos y Mediterráneos a través de una metodología enmarcada en el aprendizaje activo.
The coastal lagoon-beach complex at the Cíes Islands located at the opening of the Ría de Vigo (NW Iberia) is an important ecosystem currently threatened by anthropogenic impacts and climate variations. We used multiproxy marine sediment analyses to reconstruct the millennial environmental dynamics of this insular system and, in particular, the rec...
Geological guide of the Atlantic Islands of Galicia National Park (Spain), in which the materials as well as the geological and geomorphological processes in the territory of the archipelagos covered by the National Park are described. The most representative geological itineraries of each island are also included.
See preview in: https://www.igme....
An extensive terrace comprising sandy sheeted drifts characterises the proximal sector (close to the Straits of Gibraltar) of the Contourite Depositional System (CDS) of the Gulf of Cadiz and the western continental margin of Portugal. A novel morphosedimentary study over this terrace has been executed based on new multibeam echosounder data, seism...
Compositional, mineralogical and grain size data from 13 superficial samples recovered
between 490 and 1144 m water depth in three Contourite Depositional Systems (CDSs): the Gulf of Cadiz, Ortegal Spur and El Cachucho are presented. First surficial centimeter was analysed in different contourite features: depositional (drifts), erosive (moats) and...
Understanding water dynamics and the processes affecting water elevation in the lagoon is important in understanding how barrier-lagoon systems work and, in particular, how it affects sediment distribution and architecture. It is also important in resolving a number of environmental problems related to flooding and land management. Louro barrier-la...
The aim of this work is to present the results of GPR surveys from a large trough blowout and a saucer blowout associated to an energetic shoreline in a temperate-humid coastline (NW of Spain Traba sedimentary complex), cross-validated with core data and field exposures. Finally, to relate the sedimentological information obtained from the interpre...
Coastal sand barriers are of high environmental significance because they provide protection for highly productive landward environments. However, they are also highly susceptible environments as they can be affected by different factors such as sea-level changes, waves, tides, currents, sediment supply, seafloor slope and morphology, coastline dev...
This contribution aims to illustrate the Ortegal Cape Contourite Depositional System (OCCDS), a new example of contourites located on the northern Galicia margin generated by the Mediterranean Outflow Water (MOW) influence. This work is based on several datasets collected during two multidisciplinary cruises, including: single echosounder and swath...
Coastal geomorphology results from the combined effects of contemporary dynamics, sea-level rise and the inherited geological framework, yet the relative importance of these driving mechanisms may change throughout the evolutionary history of coastal deposits. In this contribution, we analyse the depositional history of the Cíes Islands barrier-lag...
Louro sedimentary complex is an example of a barrier lagoon system developed during the Holocene transgression in the Atlantic coast of Spain in an exposed area, located on a small bay in the external divide between Muros and Noia Rías (Galicia). The present study analyzes the architecture and evolution of the sedimentary complex in the last 6000 y...
This work is a contribution to the beach morphodynamic studies which are the essential key to improve the knowledge of the beach system evolution. This report wants to contribute with a study of the exposed Louro Beach (NW Iberian Peninsula). Several topographic surveys, grain size tracer trend experiments and wave and current numerical models (OLU...
The aim of this paper is the study of the sedimentary architecture and evolution of Louro sedimentary complex, located in the Atlantic Galician margin. The sedimentary complex is located in the external area of Muros and Noia Ría, (northwest Galicia) and is highly affected by the high-energy local maritime climate and storm events. Sediment archite...
GONZÁLEZ-VILLANUEVA, R., COSTAS, S. ALEJO, I. and PÉREZ-ARLUCEA, M., 2007. Morphological changes forced by the tidal cycle in a low estuarine beach. The aim of this study is to analyse the morphological variations of a low energy estuarine beach during a tidal cycle. Following this purpose, two surveys were deployed under contrasted hydrodynamic co...
The decadal evolution and the factors that control the variability of a recent welded barrier located in the northwest of Spain have been investigated. Analysis of the morphological changes and the evolution of the shoreline were carried out using georectified aerial photographs spanning from 1949 to 2003. The barrier shows a complex temporal and s...
Ladeira Beach is a north-south, 1.3 km long and 88-120 m wide dune-beach complex, which protects a 0.88 km 2 intertidal area, which at high tide forms a lagoon. The beach is a low-tide terrace reflective beach. Three rivers enter the complex, merging and connecting the open sea by a narrow inlet at the north. An ebb tidal delta is developed at the...
Beach management and consequent beach understanding become necessary in coastal areas due to the high pressure that they are nowadays standing. Management plan objective is the protection of particular areas, coastal areas in this case. The three islands of the Cies Archipelago, where we have developed this work, have been recently included in the...
The Tagus Prodelta (W Portugal) and the Muros Ría (NW Spain) are areas of high deposition rates registering high-resolution palaeoclimatic records for western Iberia. We compare the climatic conditions of the two areas over the last two millennia based on proxies of temperature (sea surface temperatures and oxygen isotopes), continental input (grai...
The internal structure of a modern baymouth barrier is analyzed in detail, including its historical evolution and the factors controlling it. Historical evolution was reconstructed using available aerial photographs from 1956 to 2003. Detailed geophysical data were acquired using ground-penetrating radar (GPR) and analyzed along with airphotos to r...
Sand barriers are dynamic constructions with a natural environmental trend that can be altered by human activities. Along this paper we present a case of study where sand mining activities have brought about the change of inlet position. The work is focused on the evolution and influence over sediment budget of the tidal inlet developed at Rodas Sa...
Holocene climate fluctuations in the temperate region of the Northeast Atlantic have been established by comparing marine and terrestrial proxies. This work is based on suction-cores collected in the Cies Islands lagoon (NW Spain) and vibro-cores from the adjacent continental shelf. The lower Holocene marine record (9400-7000 yr BP) consists on san...
The morphology of low-energy beaches is inherited from high-energy events showing a non equilibrium state with the prevailing conditions. An example of a sheltered, low-energy beach (Rodas Beach, NW-Iberian Peninsula) is examined in this paper. The evolution of six beach profiles was analysed during three years in order to investigate the response...
This paper examines the linkages between the space-distribution of grain sizes and the relative percentage of the amount of mineral species that result from the mixing process of siliciclastic and carbonate sediments at the Ria de Vigo (NW of Spain).The space-distribution of minerals was initially determined, starting from a detailed mineralogical...
ALEJO, I; COSTAS, S. and VILA-CONCEJO, A. 2005. Littoral evolution as a response to human activity: the case of two sedimentary systems in a Galician Ría. Journal of Coastal Research, SI 49 (Proceedings of the 2 nd Meeting in Marine Sciences), 64 – 69. Valencia -– Spain, ISSN 0749-0208. Changes in coastal environments may be the result of natural s...
The distribution of live benthic foraminifera (0.0�63 �mm) in box core samples from coarse sediments of the Ría de Vigo (NW Iberian margin) is mainly related to food availability and bottom current range. Live benthic
foraminifera are dominated by small forms (63–125 �microns). Faunal densities and diversity values suggest that
very coarse substrat...
Benthic foraminifera assemblages from the outer sector of the ría de Muros have been analyzed in order to obtain a detailed reconstruction of Holocene environmental evolution. The studied core (EUGC-3B: 42' 45.10'N; 9' 02.23'W, at 38 m.b.s.l. and 410 cm length) consists of muddy sand from the core bottom (8200 cal yr BP) to 200 cm (2700 cal yr BP)...
Carbon and oxygen stable isotopes and ICP-OES elemental ratio concentrations (Mg/Ca, Sr/Ca, Ba/Ca) from core EUGC-3B (42 45.10'N; 9 02.23'W, at 38 m.b.s.l. and 410 cm length) were measured over monospecific benthic foraminiferal samples (Nonion fabum) ranging over the last 4500 yr BP. From the oldest analysed sample (289 cm) to the core top, stable...
Coastal deposits are not prominent in the Ria de Vigo, high cliffs dominate the coast line, but several well-preserved sedimentary areas are observed. Beach and aeolian sand dunes are preserved in protected bays along margins between low cliffs, as Playa America, Patos and Samil. Several rivers form prominent estuaries such as the Verdugo-Oitaven,...
The Barqueiro Ria, located on the north coast of the Iberian Peninsula, is one of the Galician "Rías Altas", which includes Arealonga Beach, the longest beach in the Ria, located in the inner portion. During the 1990s strong erosion has been registered on the beach and associated dunes, while a wide intertidal spit has grown westward. This behavior...
RESUMEN: La descripción de la morfología, el seguimiento topográfico y análisis granulométrico de los sedimentos del cordón durar de la playa de Arealonga muestran que la evolución de este ambiente sedimentario está fuertemente condicionada por las interacciones playa/duna. Se han definido cuatro sectores en el cordón durar, afectados por procesos...
This work deals with the human activities effects on the morphologic evolution of a sand barrier system. The actual Islas Cíes Natural Park have suffered an important impact-sand mining and constructions-during the last four decades, with a notable change of the beach-barrier-lagoon morphologic. Medium term and short term analysis, using aerial pho...
RESUMEN En este trabajo se presenta la comparación de los sedimentos superficiales de la plataforma proximal de tres complejos playeros situados en las inmedia-ciones de la embocadura de la Ría de Muros y Noia. En cada uno de ellos, se han identificado las distintas poblaciones sedimentarias en función de los aná-lisis granulométricos realizados. L...
En este trabajo se presenta la comparación de los sedimentos superficiales de la plataforma proximal de tres complejos playeros situados en las inmedia-ciones de la embocadura de la Ría de Muros y Noia. En cada uno de ellos, se han identificado las distintas poblaciones sedimentarias en función de los aná-lisis granulométricos realizados. La aplica...
Las pautas generales de sedimentación en ambientes mixtos siliciclásticos-carbonatados, son normalmente analizadas a partir de variables vinculadas con procesos dinámicos, considerados como los principales factores que, actuando sobre ambas fracciones, siliciclástica y carbonatada, dan lugar a una distribución espacial promedio, caracterizada por e...
The relative space distributions of single mineral constituents in mixed terrigenous-carbonated sediments of the Bayona Bay have been analysed. In order to determine the existence of different mixing mechanisms, a study comparing the general sedimentary trends resulting from the average patterns and the single mineral behaviour, reflected in the si...
Foraminiferal studies provide a key to understanding the dynamics of a shallow marine environment from Baiona Bay, N.W. Spain. Preliminary data describing the foraminiferal distributions and associated physical and oceanographic setting are presented. A new species list is provided for this regíon, which includes both autochthonous and allochthonou...
At present a very well declined zonation was observed, caused by the action of the tides and waves fronts, by its particular physiographic configuration and by harbour constructions that took place lately. -from English summary
