A5045056947- Marine and coastal ecosystems
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Instituto Español de Oceanografía
2009-2025
National Institute of Oceanography and Applied Geophysics
2020-2024
Spanish National Cancer Research Centre
2024
Oxford Graduate School
2023
National Institute of Oceanography
2023
Research Institute Hospital 12 de Octubre
2022
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2018-2019
Centro Oceanográfico de Gijón
2009-2017
University of Strathclyde
2011
Biologie des Oiseaux et Aviculture
2011
Samples from a monthly monitoring programme in the Cantabrian Sea were analysed with FlowCAM-based automated technique. The estimates of abundance, biomass size spectra and taxonomic diversity nano- microplankton communities compared those obtained by traditional microscopical analysis same samples. structure abundance preserved plankton sample determined using FlowCAM showed minimal differences estimates. effects preservation inaccuracies automatic classification are main causes...
Any technique developed to enumerate plankton must take into account the size structure of community. Automatic sampling devices be capable analysing a minimum number cells largest cover whole range intended sampled effectively. The Flow Cytometer And Microscope (FlowCAM®) has been used in last decade estimate Few attempts, however, have made compare FlowCAM measurements with results provided by traditional microscopy methods for size-structure estimations. can operate three working modes:...
To protect marine ecosystems threatened by climate change and anthropic stressors, it is essential to operationally monitor ocean health indicators. These are metrics synthetizing multiple processes relevant the users of operational services. Here we assess if selected indicators simulated models can be controlled (here meaning constrained effectively) biogeochemical observations, using a newly proposed methodological framework. The method consists in firstly screening sensitivities with...
The most commonly used biomass estimate for microalgae is obtained from cell biovolume, usually calculated microscopically measured linear dimensions. Although reliable, this a highly time-consuming and specialized technique. Automated sampling devices that acquire images of cells use pattern recognition techniques to identify the have been developed as an alternative microscopy-based methods. There are some aspects automatic classification methods, however, which can be improved analysis...
This study investigates the spatial and temporal variability of chromophoric-dissolved organic matter (CDOM) in Mediterranean Sea. The analysis is carried out using a state-of-the-art 3D biogeochemical model. model describes plankton dynamics, cycles most important limiting nutrients, particulate dissolved pools carbon. source CDOM directly correlated to dynamics carbon (DOC) by fixed production quota. Then degrades photobleaching remineralization. main innovation system inclusion...
Abstract. The Mediterranean Forecasting Systems produces operational analyses, reanalyses and 10-day forecasts for many Essential Ocean Variables (EOVs), from currents, temperature to wind waves pelagic biogeochemistry. products are available at a horizontal resolution of 1/24 degrees (approximately 4 km) 141 unevenly spaced vertical levels. core the System is constituted by physical (PHY), biogeochemical (BIO) wave (WAV) components coupled offline, consisting both numerical models data...
The Mar Menor is the largest hypersaline coastal lagoon in Europe, located semi-desertic south-east of Iberian peninsula. This provides a variety ecosystem services and resources to community but, although it has been traditionally considered oligotrophic, recent decades suffered drastic changes degradation caused by human activities, including agriculture, mining tourism. In early 1990s, began receive high inputs nutrients organic matter due agricultural practices watershed. Due complexity,...
Abstract In recent decades, the automatic study and analysis of plankton communities using imaging techniques has advanced significantly. The effectiveness these automated systems appears to have improved, reaching acceptable levels accuracy. However, ecologists often find that classification do not work as well expected when applied new samples. This paper proposes a methodology assess efficacy learned models which takes into account fact data distribution (the composition sample) can vary...
The phytoplankton absorption cross-section is a fundamental quantity in biogeochemical ocean models that alters the underwater spectral light field and photosynthetic response of phytoplankton. Phytoplankton taxa are characterized by spectra with defined bands visible region spectrum govern capability different to exploit as resource for growth. interplay between spatial temporal gradients characteristics types contribute interactions selection among groups hence can be determinant shaping...
Abstract. The Mediterranean Forecasting System produces operational analyses and reanalyses 10 d forecasts for many essential ocean variables (EOVs), from currents, temperature, salinity, sea level to wind waves pelagic biogeochemistry. products are available at a horizontal resolution of 1/24∘ (approximately 4 km) with 141 unevenly spaced vertical levels. core the is constituted by physical (PHY), biogeochemical (BIO), wave (WAV) components, consisting both numerical models data...
ABSTRACT In unicellular phytoplankton, the size scaling exponent of chlorophyll content per cell decreases with increasing light limitation. Empirical studies have explored this allometry by combining data from several species, using average values pigment and for each species. The resulting thus includes phylogenetic effects. possibility measuring single-cell fluorescence imaging-in-flow cytometry devices allows study at both inter- intraspecific levels. work, changing was estimated first...
The Spring Phytoplankton Bloom takes place in the Central Cantabrian Sea (Southern Bay of Biscay) from late-winter to spring as a series blooms with variable biomass accumulation. In 2004 and 2005, phytoplankton occurred this area following change weather. order describe dynamics these blooms, two oceanographic cruises which involved high-frequency sampling (every 2–3 days) were carried out. Meteorological conditions during showed similar changes variables relevant physiology population...
Abstract Phytoplankton harvests light by integrating chlorophyll in protein‐pigment complexes (photosystems) that are variable number and size. In ecosystem models, the capacity of harvesting is described as pool chlorophyll. Since most variability phytoplankton content driven acclimation to changing nutrient conditions, photoacclimation generally parameterized a regulation synthesis with light. However, photosystems can also be degraded, few process‐based models have been proposed...
Abstract The chlorophyll‐specific absorption spectrum of phytoplankton multiplied with chlorophyll provides the total coefficient [ ], a fundamental quantity significance in many marine biogeochemical (BGC) and environmental processes. Representing accurately sources variability BGC ocean models is crucial task. two main are changes pigment composition community size‐dependent constraints to packaging. Therefore, structure physiological state impact consequently . objective this work improve...
In many applications, the mistakes made by an automatic classifier are not equal, they have different costs. These problems may be solved using a cost-sensitive learning approach. The main idea is to minimize number of errors, but total cost produced such mistakes. This brief presents new multiclass algorithm, in which each example has attached its corresponding misclassification cost. Our proposal theoretically well-founded and designed optimize loss functions. research was motivated...
Heat and alcohol-induced nucleation pathways of the whey protein β-lactoglobulin were investigated using small angle neutron X-ray scattering for structural characterization. Protein solutions at various concentrations either heated stepwise to 80 °C or mixed with ethanol 50% (v/v). Heating induces dissociation dimer in neutral pH aqueous medium, leading about 75 tetrameric, cylindrical clusters, as indicated by three dimensional rigid body bead modelling performed fit curves. In contrast...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 543:73-87 (2016) - DOI: https://doi.org/10.3354/meps11580 Size-dependent photoacclimation of phytoplankton community in temperate shelf waters (southern Bay Biscay) Eva Álvarez1,*, Xosé Anxelu G. Morán1,2, Ángel López-Urrutia1, Enrique Nogueira1 1Instituto Español de Oceanografía, Centro Oceanográfico...
Abstract Microalgae are capable of acclimating to dynamic light environments, as they have developed mechanisms optimize harvesting and photosynthetic electron transport. When absorption exceeds capacity, various physiological protective prevent damage the apparatus. Xanthophyll pigments provide one most important photoprotective dissipate excess energy photoinhibition. In this study, we coupled a mechanistic model for phytoplankton photoinhibition with global biogeochemical Regulated...
Abstract. Chromophoric dissolved organic matter (CDOM) significantly contributes to the non-water absorption budget in Mediterranean Sea. The coefficient of CDOM, αCDOM(λ), is measurable situ and remotely from different platforms can be used as an indicator concentration other relevant biogeochemical variables, e.g., carbon. However, our ability model processes that determine CDOM concentrations still limited. Here we propose a novel parametrisation cycle accounts for interplay between...
Abstract. Chromophoric dissolved organic matter (CDOM) significantly contributes to the non-water absorption budget in Mediterranean Sea. The coefficient of CDOM, aCDOM(λ), is measurable situ and can be retrieved remotely, although ocean-colour algorithms do not distinguish it from detritus. These observations used as indicators for concentration other relevant biogeochemical variables ocean, e.g. carbon. However, our ability model processes that determine CDOM concentrations still limited....
Abstract Capture-based targeted sequencing is routinely used for small variant detection in cancer clinical care. Alongside DNA, off-target DNA also sequenced. These reads are distributed across the genome, allowing a whole genome copy number profile to be derived without need SNP backbone. Here we present CopyRight, method that generates robust genome-wide profiles, which can downstream chromosomal instability (CIN) quantification, overcoming various sources of technical noise with novel...
Protein disulphide isomerase (PDI) in the endoplasmic reticulum catalyzes rearrangement of bridges during folding secreted proteins. It binds various molecules that inhibit its activity. But here, we looked for would potentiate PDI reductase activity was measured vitro using di-eosin-oxidized glutathione as substrate. Its classical inhibitor bacitracin found to exert a biphasic effect: stimulatory at low concentrations (∼10(-6) M) and inhibitory only higher (∼10(-4)-10(-3) M). The weak...