• Home
  • Antonio Delgado Huertas
Antonio Delgado Huertas

Antonio Delgado Huertas
CSIC-UGR Instituto Andaluz de Ciencias de la Tierra (IACT) · Stable Isotope Biogeochemistry Lab

PhD Geology (University of Granada)

About

388
Publications
88,406
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
8,544
Citations
Introduction
My research is focused on stable isotope biogeochemistry (13C/12C, 18O/16O, D/H, 15N/14N and 34S/32S) with special emphasis on a multidisciplinary approach of the interactions between the atmosphere, hydrosphere, biosphere and geosphere. We are working on the isotopic footprint of C, N and O in the oceans studying organic matter, methane, DIC, DOC and O2 dissolved in waters of the Atlantic, Indian, Pacific and Arctic. Other areas of research are food webs, paleoclimatology,volcanic gases, etc.
Additional affiliations
October 2017 - March 2018
University of Bristol
Position
  • Research Collaborator
January 2010 - present
Spanish National Research Council
Description
  • stable isotope biogeochemistry (13C/12C, 18O/16O, D/H, 15N/14N and 34S/32S) with special emphasis on a multidisciplinary approach of the interactions between the atmosphere, hydrosphere, biosphere and geosphere
January 2010 - present
Instituto Andaluz de Ciencias de la Tierra (CSIC.UGR), Armilla (Granada), Spain
Position
  • Investigador Cientifico
Description
  • The Instituto Andaluz de Ciencias de la Tierra (IACT) is a Joint Centre of the Consejo Superior de Investigaciones Científicas (CSIC) and the Universidad de Granada (UGR). The IACT is located in Armilla (Granada), Spain
Education
January 1988 - February 1994
University of Granada
Field of study
  • Stable isotopes in clay minerals
October 1982 - June 1987
University of Granada
Field of study
  • Geology

Publications

Publications (388)
Article
Full-text available
Plankton respiration rate is a major component of global CO2 production and is forecasted to increase rapidly in the Arctic with warming. Yet, existing assessments in the Arctic evaluated plankton respiration in the dark. Evidence that plankton respiration may be stimulated in the light is particularly relevant for the high Arctic where plankton co...
Article
Full-text available
The Arctic Ocean is warming at two to three times the global rate 1 and is perceived to be a bellwether for ocean acidification 2,3. Increased CO 2 concentrations are expected to have a fertilization eeect on marine autotrophs 4 , and higher temperatures should lead to increased rates of planktonic primary production 5. Yet, simultaneous assessment...
Article
Full-text available
Las Cruces is a base-metal deposit in the Iberian Pyrite Belt, one of the world's best-known ore provinces. Here we report the occurrence of major Pb-Ag-Au mineralization resulting from recent sub-surface replacement of supergene oxyhydroxides by carbonate and sulphide minerals. This is probably the largest documented occurrence of recent microbial...
Article
Full-text available
Incubation (in vitro) and incubation-free (in situ) methods, each with their own advantages and limitations, have been used to derive estimates of net community metabolism in the oligotrophic subtropical gyres of the open ocean. The hypothesis that heterotrophic communities are prevalent in most oligotrophic regions is consistent with the available...
Article
About eighty specimens from ten different species of mammals, collected from different areas under different climatic and environmental conditions, were measured for the oxygen isotopic composition of their bone and tooth phosphate. The equations relating these values to the mean oxygen isotopic composition of local meteoric water were also derived...
Article
The Mexican Pacific was influenced by “La Mancha” and “El Niño”, from 2014 and until 2016. The increase in sea surface temperature influenced the feeding habits of the bat ray (Myliobatis californica) in the northwest of Baja California Sur, Mexico. To evaluate possible changes in the diet, stomach content analysis and analysis of stable isotopes o...
Article
Full-text available
The mangrove tree-climbing crab Aratus pisonii (Sesarmidae) is one of the most abundant and iconic arboreal brachyurans in the Neotropics. Despite being traditionally regarded as an herbivorous consumer leaving visible rasping marks on Rhizophora mangle leaves, gut content analyses, field observations and experimental feeding trials also suggest fa...
Article
Full-text available
Objectives The Late Iron Age in continental Europe featured complex demographic processes including, among others, the establishment of transalpine “Celtic” communities on the Italian peninsula between the 4th and 1st centuries BCE. To date, only few data are available about mobility and migration in these populations. Here we explore these topics...
Article
Full-text available
The ontogeny of pelagic species is difficult to study due to their migratory patterns and the inaccessibility of their habitats, leaving a large part of their life history little understood. The aim of this work is to investigate the trophic ontogeny of an individual of Isurus paucus based on isotopic analysis of long-term tissue (vertebra and musc...
Conference Paper
During the Late Iron Age (4th-1st centuries BCE) Europe was interested by intense migratory processes across the Alps. In this period, several "Celtic" populations settled in the Italian peninsula. So far, only scarce data are available about mobility in these communities. In this work, we explore mobility patterns among the Cenomani population of...
Article
Sharks are top predators and play an important role in the regulation of marine ecosystems at lower trophic position. Mustelus californicus, Sphyrna zygaena, and Isurus oxyrinchus prove to be important fishery resources along the western coast of Baja California Sur and cohabit the same coastal areas, probably sharing resources. However, our knowle...
Preprint
Living beings inhabit heterogeneous environments, in which communities that are classified as discrete can be continuous and connected in innumerable ways. The components of food webs can cross borders between ecosystems, and as result, the structure and trophic dynamics of ecosystems can change. The goal of this study was to evaluate trophic conne...
Article
The Cape Verde Frontal Zone (CVFZ) is a highly dynamic region located in the southern boundary of the Canary Current Eastern Boundary Upwelling Ecosystem. Due to the interaction of the Cape Verde Front with the Mauritanian coastal upwelling, the area features large vertical and horizontal export fluxes of organic matter. While the flux, composition...
Article
Full-text available
Scalloped hammerhead shark, Sphyrna lewini, is considered a generalist predator, showing individual specializations and different trophic levels. This species inhabits both oceanic islands and coastal nursery areas in the eastern tropical Pacific (ETP) Ocean. Existing trophic ecology studies on S. lewini have been focused on stomach contents. This...
Article
Full-text available
The demersal fish are a commercial resource of small-scale fisheries of northern Colombian Caribbean. Balistes capriscus is frequently and important in fishing landings, but this species has not economic value and its trophic ecology is unknown. Due to this, the diet was examined using the stomach contents and stable isotopes analysis. The individu...
Article
Estuaries are highly productive habitats that support fisheries production. However, the importance of mangrove carbon to estuarine consumers can differ considerably among systems. This study used stable isotopes (δ13C / δ15N) to investigate the importance of mangrove carbon as an energy source to estuarine consumers in the Atrato River Delta Colom...
Article
Coastal areas are particularly important, as their shallow waters commonly correspond to nursery areas for many species. Unfortunately, these habitats also support many commercial fisheries which overlap with nursery areas and can represent a risk to numerous shark species, including Sphyrna lewini which frequent both coastal waters and offshore is...
Article
The present study provides an example of how palaeopedology and facies analysis may be integrated for the interpretation of a cyclothemic succession in the Upper Pliocene (Piacenzian) of the Valdelsa Basin (central Italy). The stacking of facies and intervening bounding surfaces, including palaeosols, outline a hierarchy of elementary (EDS) and com...
Article
Full-text available
Here we provide valuable information about the palaeoenvironmental evolution of Southwestern Mediterranean region during the last ca. 320 ka through a biomarker-based study of the longest continuous continental Quaternary record in the Iberian Peninsula. The n-alkane content and δ13C values of these lipids were measured in 300 samples taken from th...
Article
Full-text available
For the first time, this article presents a large dataset of precipitation isotopic measurements (δ18Op and δ2Hp) sampled every day or 2 d from seven sites on a west-to-east transect across northern Spain for 2010–2017. The main aim of this study is to (1) characterize the rainfall isotopic variability in northern Spain at daily and monthly timesca...
Article
Primary producers in the aquatic community structure are fundamental elements because they are the first link in the trophic network as occur in most ecosystems. They produce oxygen and biomass, act as a shelter for several species, and provide food for a wide variety of megaherbivore species like manatees and sea turtles. Physicochemical processes...
Conference Paper
Full-text available
In 2014 due to the projected layout of the Madrid – Jaén high speed railway line, a preventive archaeological intervention was carried out on a hill near the Guadalbullón riverbed within the farmland of Grañena Baja (Jaén). During the work a multi-sequential Recent Prehistory occupation, starting from the mid-5th millennium and reaching the end of...
Article
Changes in feeding habits during ontogeny show that organisms can present shifts in foraging behavior during their life cycle, which can alter local trophic dynamics. Therefore, describing diet across species ontogeny clarifies the ecological niche and ecosystem role of marine predators. In this study, diet tracers (stable isotope analysis) were an...
Article
Full-text available
The Eastern Mediterranean continental slope offshore Israel became a focus of exploration for, and production of, natural gas in recent years. The 2010–2011 Nautilus ROV expedition performed detailed video recordings and sampling in two areas offshore Israel: the Palmachim disturbance, southwest of Tel Aviv, and an area offshore Acre, north of Haif...
Article
Full-text available
Deep-sea hypersaline anoxic basins are polyextreme environments in the ocean’s interior characterized by the high density of brines that prevents mixing with the overlaying seawater, generating sharp chemoclines and redoxclines up to tens of meters thick that host a high concentration of microbial communities. Yet, a fundamental understanding of ho...
Article
Objectives Gender differentiation can influence the diet, physical activity, and health of human populations. Multifaceted approaches are therefore necessary when exploring the biological consequences of gender‐related social norms in the past. Here, we explore the links between diet, physiological stress, physical activity, and gender differentiat...
Article
Full-text available
El presente trabajo fue desarrollado en el Complejo volcánico Copahue-Caviahue en la provincia de Neuquén, Argentina. El objetivo principal es analizar el proceso de dilución de las aguas ácidas del sistema volcánico hídrico por el ingreso al mismo de las aguas de deshielo y la posterior precipitación de hidroxisulfatos de hierro y aluminio, schwer...
Article
Isotopic values of two Caribbean Sharpnose Shark Rhizoprionodon porosus litters (Poey, 1861) with two and three embryos, and one litter of eleven Smalltail Shark Carcharhinus porosus embryos, showed enriched ¹⁵N and ¹³C compared to their mothers. In R. porosus, embryonic isotope values were 3.06 ± 0.07 ‰ and 0.69 ± 0.15 ‰ greater than their mothers...
Article
Agriculture is an important source of the greenhouse gas nitrous oxide (N2O) due to the over- or non-synchronised application of nitrogen to crops. Symbiotic nitrogen fixation (SNF) by legume-rhizobia symbiosis can be an effective strategy for N2O mitigation, but several environmental factors such as copper (Cu) availability might affect N2O emissi...
Article
The brown smoothhound shark Mustelus henlei is the most important shark species in the artisanal fisheries of the western coast of Baja California Sur, Mexico. Its trophic ecology was analyzed using carbon (13C) and nitrogen (15N) stable isotope analysis in the muscle tissue. The values of C (18.2 ± 0.6 ‰) and N (17.7 ± 0.9 ‰) suggest that this spe...
Article
On the west coast of Baja California Sur, the shark species Mustelus henlei, Carcharhinus falciformis, Prionace glauca, Isurus oxyrinchus, and Sphyrna zygaena are of economic importance and coexist in the same ecosystem. However, the trophic role of each species in this ecosystem is poorly understood. Stable isotopes of nitrogen and carbon (δ 15 N,...
Preprint
Full-text available
This article presents for the first time a large dataset of rainfall isotopic measurements (d18Op and d2Hp) sampled every day or every two days from seven sites in a west-to-east transect across northern Spain for 2010–2017. The main aim of this study is to: (1) characterize rainfall isotopic variability in northern Spain at daily and monthly time...
Article
Full-text available
Mangroves are important coastal ecosystems of warm climatic regions that often grow in shallow saline or brackish waters of estuaries and river mouths which are affected by wide tidal intervals and receive abundant nutrient supply. However, mangroves also occur in areas of little tidal influence and devoid of riverine inputs, where they can develop...
Article
Full-text available
Se presentan en este estudio los resultados de los análi­sis isotópicos realizados sobre una muestra de restos huma­nos de la necrópolis calcolítica de Los Millares. Para proce­der a su discusión se ha realizado previamente su contextualización cronológica a partir de una serie de data­ciones radiocarbónicas y la revisión de la cronología relati­va...
Article
Full-text available
Late Quaternary volcanic basins are active landscapes from which detailed archives of past climate and seismic and volcanic activity can be obtained. A multidisciplinary study performed on a transect of sediment cores was used to reconstruct the depositional evolution of the high-elevation Laguna del Maule (LdM) (36∘ S, 2180 m a.s.l., Chilean Andes...
Article
A multiproxy study based on sedimentology, mineralogy, magnetic susceptibility, organic geochemistry and fossil content allowed to establish the sedimentary evolution of palustrine basins and to study the interplay between tectonic and climatic forcings in the sedimentation and facies arrangement that can be extrapolated to other coal-bearing basin...
Article
To gain a better understanding on the trophic ecology of New Granada sea catfish, Ariopsis canteri, and their linkage to mangroves, nitrogen, and stable carbon isotopes (δ¹⁵N and δ¹³C), as well as Bayesian mixing models, were used to explore trophic dynamics and potential ontogenetic feeding shifts across different size classes: class I (8–20 cm),...
Article
Full-text available
Small dogs as pets, objects of affection and special consideration by their owners, are known in the Western Mediterranean since classical Antiquity through texts, epigraphy and iconography. The study of a small-sized canid with a brachycephalic skull discovered in a cemetery, among other specimens, in the southern Hispania yields new interpretatio...
Article
We provided valuable information about the palaeoenvironmental evolution of Southwestern Europe during the last 800 ka through the palynological study of the longest continuous continental Quaternary record in the Iberian Peninsula and in the Southwestern Mediterranean region. The SPD core studied here constituted the longest sequence recovered at...
Article
The economic and political disruption following the collapse of the Roman Empire is an important moment for the cultural and biological history of Western Europe. One of the trends associated this socioeconomic change is the re‐use of Roman public monuments for different purposes including funerary ones. The cultural meaning of this practice, occas...
Article
The Navas de San Juan copper deposit is located at the southeast edge of the Iberian massif (Spain). It occurs within Triassic continental red beds that represent an undeformed, horizontal to sub-horizontal sequence, overlying unconformably folded Paleozoic metasedimentary rocks and, locally, granitic rocks. The red beds consist essentially of sili...
Article
The concentration of CH4 in water was measured along five transects in the Gulf of Cadiz (Trafalgar, Sancti Petri, Guadalquivir, Tinto - Odiel and Guadiana) during four cruises throughout the months of March, June, September and December 2016. For two of the cruises water overlying three mud volcanoes situated in the Gulf of Cadiz were also sampled...
Article
A medieval osteological sample (n = 20) from the isolated rural community of San Baudelio de Berlanga (Soria, N-Spain) was studied using paleopathological and stable isotope analyses. The necropolis was initially dated by archeologists between the XI and XII centuries AD and contains 57 individuals. The main objective of this study was to investiga...
Article
Full-text available
The previously uncharted Afifi brine pool was discovered in the eastern shelf of the southern Red Sea. It is the shallowest brine basin yet reported in the Red Sea (depth range: 353.0 to 400.5 m). It presents a highly saline (228 g/L), thalassohaline, cold (23.3 °C), anoxic brine, inhabited by the bacterial classes KB1, Bacteroidia and Clostridia a...
Preprint
Full-text available
Abstract. Late Quaternary volcanic basins are active landscapes from which detailed archives of past climate, seismic and volcanic activity can be obtained. A multidisciplinary study performed on a transect of sediment cores was used to reconstruct the depositional evolution of the high-elevation Laguna del Maule (LdM) (36° S, 2180 m asl, Chilean A...
Article
This study presents the isotopic ratios, radiocarbon datings and anthropological analyses of five (N=5) Early Copper Age individuals from two archaeological sites (Arruzafa and Iglesia Antigua de Alcolea) of the Middle Guadalquivir Valley near the city of Córdoba (Spain). Four had been buried in the same grave, possibly in a single event or in a ve...
Article
Arctic calcifiers are believed to be particularly vulnerable to ocean acidification as the Arctic already experiences low carbonate saturations states due to low temperature and high inputs of freshwater. Here, we report the finding of dense beds of Mytilus growing in tidal lagoons and river mouths, where the availability of carbonate ions is remar...
Presentation
Full-text available
Do manatees in the Mexican Caribbean have feeding preferences? What have the manatees been eating in the Mexican Caribbean for the last 30 years?
Article
Full-text available
Legume-rhizobia symbiotic associations have beneficial effects on food security and nutrition, health and climate change. Hypoxia induced by flooding produces nitric oxide (NO) in nodules from soybean plants cultivated in nitrate-containing soils. As NO is a strong inhibitor of nitrogenase expression and activity, this negatively impacts symbiotic...
Article
Rationale: Stable carbon isotope ratios have many applications in natural sciences. In the first worldwide interlaboratory proficiency test, the discrepancies in measured δ13 CDIC values of natural waters were up to σ = ±3‰. Therefore, we continued the investigation on the analytical data quality assurance of individual laboratories and internal c...
Conference Paper
Full-text available
Several samples of bituminous limestones and cretaceous black shales of V, U and Zn mineralization from La Sota, Ecuador, were analyzed chemically, being determined by the elementary relationships of V/V+Ni and V/Cr proposed by several authors [1,2], that the sedimentation conditions of these rocks varied from oxic to mostly anoxic, including sever...
Article
Full-text available
The massive sulfide deposits of the southern Iberian Pyrite Belt (IPB) occur as shale-hosted exhalative mounds or shallow sub-seafloor replacive bodies that formed at the Devonian-Carboniferous boundary in anoxic bottoms. The geochemistry of the mineralization and the host shale from some of the major deposits, including a detailed 50-m-thick secti...
Article
Full-text available
Phytoplankton contribute half of the primary production (PP) in the biosphere and are the major source of energy for the Arctic Ocean ecosystem. While PP measurements are therefore fundamental to our understanding of marine biogeochemical cycling, the extent to which current methods provide a definitive estimate of this process remains uncertain gi...
Article
Full-text available
Ontogenetic changes in habitat and food preferences are common in nature; they reflect changes in the needs of organisms during their lifetime. Studying the dietary ontogeny of pelagic species is a difficult task, because of migratory processes and the inaccessibility of their habitats. As a result, their life history remains poorly understood, or...
Article
In the framework of a natural CO2 reservoir with CO2 leakages as an analogue of a failed CO2 deep geological storage, the current precipitation of travertines and the associated upwelling of CO2-rich saline groundwater were analysed. This natural analogue is located in the Gañuelas-Mazarrón Tertiary Basin (SE Spain). The study comprises of the chem...
Article
Full-text available
This work presents the first results of carbon isotope (δ13C) analysis of seeds (Triticum dicoccum, Triticum aestivum/durum, Triticum cf. spelta and Hordeum vulgare L.) from archaeological contexts from the settlement sites of A Fontela and Castrovite in Northwest Iberia, which cover a chronological range between 1050 cal BC and 25 cal AD. In addit...