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Prof. Dr. Jesús Mercado
Centro Oceanográfico de Málaga, Instituto Español de Oceanografía, Puerto Pesquero s/n, 29640 Fuengirola, Málaga, Spain

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0 Oceanography
0 phytoplankton
0 ocean acidification
0 Nutrient Pollution
0 Coastal eutrophication

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phytoplankton
ocean acidification
Nutrient Pollution
Pelagic ecosystems

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Journal article
Published: 20 January 2021 in Marine Pollution Bulletin
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Monthly samplings carried out in 2016–2019 and satellite color images from 2002 to 2019 have been combined to determine the onset and causative species of the ecosystem disruptive algal bloom (EDAB) that affects the Mar Menor coastal lagoon (Western Mediterranean Sea) since 2015. Substantial changes in satellite spectral reflectance attributable to increasing abundance of Synechococcus were registered in 2014. Furthermore, cell abundances of this species in 2016 were the largest ever obtained in the lagoon (6 106 cells mL−1), with values similar to those reported for other Mediterranean hypertrophic estuaries and coastal lagoons. These results suggest that the early changes leading to the EDAB started in 2014 and that Synechococcus played a relevant role in its development. Moreover, diatom and dinoflagellate abundances changed substantially in 2016–2019, ranging from 102 to more than 104 cells mL−1. Some of these changes were linked to flood, suggesting that EDAB has modified substantially the homeostatic capacity of the lagoon.

ACS Style

Jesús M. Mercado; Dolores Cortés; Francisco Gómez-Jakobsen; Candela García-Gómez; Sophia Ouaissa; Lidia Yebra; Isabel Ferrera; Nerea Valcárcel-Pérez; María López; Rocío García-Muñoz; Aranzazu Ramos; Jaime Bernardeau; María Dolores Belando; Eugenio Fraile-Nuez; Juan M. Ruíz. Role of small-sized phytoplankton in triggering an ecosystem disruptive algal bloom in a Mediterranean hypersaline coastal lagoon. Marine Pollution Bulletin 2021, 164, 111989 .

AMA Style

Jesús M. Mercado, Dolores Cortés, Francisco Gómez-Jakobsen, Candela García-Gómez, Sophia Ouaissa, Lidia Yebra, Isabel Ferrera, Nerea Valcárcel-Pérez, María López, Rocío García-Muñoz, Aranzazu Ramos, Jaime Bernardeau, María Dolores Belando, Eugenio Fraile-Nuez, Juan M. Ruíz. Role of small-sized phytoplankton in triggering an ecosystem disruptive algal bloom in a Mediterranean hypersaline coastal lagoon. Marine Pollution Bulletin. 2021; 164 ():111989.

Chicago/Turabian Style

Jesús M. Mercado; Dolores Cortés; Francisco Gómez-Jakobsen; Candela García-Gómez; Sophia Ouaissa; Lidia Yebra; Isabel Ferrera; Nerea Valcárcel-Pérez; María López; Rocío García-Muñoz; Aranzazu Ramos; Jaime Bernardeau; María Dolores Belando; Eugenio Fraile-Nuez; Juan M. Ruíz. 2021. "Role of small-sized phytoplankton in triggering an ecosystem disruptive algal bloom in a Mediterranean hypersaline coastal lagoon." Marine Pollution Bulletin 164, no. : 111989.

Journal article
Published: 25 September 2020 in FEMS Microbiology Ecology
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The diversity of protists was researched in the Alboran Sea (SW Mediterranean Sea) by means of high-throughput sequencing technologies based on the amplification of the V9 region of 18S rRNA. Samples were collected at different depths in seven stations following an environmental gradient from a coastal upwelling zone to the core of an oligotrophic anticyclonic gyre (AG). Sampling was performed during summer, when the water column was stratified. The superphyla Alveolata, Stramenopila and Rhizaria accounted for 84% of the total operational taxonomic units (OTUs). The most diverse groups were Dinophyceae (21% of OTUs), Marine Alveolates-II (MALV-II; 20%), Ciliophora (9%) and MALV-I (6%). In terms of read abundance, the predominant groups were Dinophyceae (29%), Bacillariophyta (14%), MALV-II (11%) and Ciliophora (11%). Samples were clustered into three groups according to the sampling depth and position. The shallow community in coastal stations presented distinguishable patterns of diatoms and ciliates compared with AG stations. These results indicate that there was a strong horizontal coupling between phytoplankton and ciliate communities. Abundance of Radiolaria and Syndiniales increased with depth. Our analyses demonstrate that the stratification disruption produced by the AG caused shifts in the trophic ecology of the plankton assemblages inducing a transition from bottom-up to top-down control.

ACS Style

Candela García-Gómez; Lidia Yebra; Dolores Cortés; Antonio Sánchez; Aitor Alonso; Nerea Valcárcel-Pérez; Francisco Gómez-Jakobsen; Inma Herrera; Carolina Johnstone; Jesús M Mercado. Shifts in the protist community associated with an anticyclonic gyre in the Alboran Sea (Mediterranean Sea). FEMS Microbiology Ecology 2020, 96, 1 .

AMA Style

Candela García-Gómez, Lidia Yebra, Dolores Cortés, Antonio Sánchez, Aitor Alonso, Nerea Valcárcel-Pérez, Francisco Gómez-Jakobsen, Inma Herrera, Carolina Johnstone, Jesús M Mercado. Shifts in the protist community associated with an anticyclonic gyre in the Alboran Sea (Mediterranean Sea). FEMS Microbiology Ecology. 2020; 96 (11):1.

Chicago/Turabian Style

Candela García-Gómez; Lidia Yebra; Dolores Cortés; Antonio Sánchez; Aitor Alonso; Nerea Valcárcel-Pérez; Francisco Gómez-Jakobsen; Inma Herrera; Carolina Johnstone; Jesús M Mercado. 2020. "Shifts in the protist community associated with an anticyclonic gyre in the Alboran Sea (Mediterranean Sea)." FEMS Microbiology Ecology 96, no. 11: 1.

Journal article
Published: 24 July 2019 in Continental Shelf Research
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Thermal stratification of the water column promotes contrasting ambient with respect to irradiance level and nutrient concentration for phytoplankton growth, demanding more research on which environmental factor has more importance in determining the photosynthetic performance of the communities. For this purpose, two research surveys were performed in several coastal stations located in the Alboran Sea (Western Mediterranean Sea) at the end 2008 and 2009 summers. Primary productivity was estimated by determining photosynthetic electron transport rates (ETRB) and inorganic carbon assimilation rates (PPCB) at two different depths within the water column, surface and chlorophyll a vertical maximum depth (CM). At surface, communities presented similar photo-acclimation features during the two surveys, which were different from those obtained for the CM samples that grew at more favorable nutrient and light conditions. The acclimation response to surface conditions consisted in the reduction in the chlorophyll a (Chl a) cell content, and the increase in the Chl a specific light absorption coefficient [a*(λ)], initial slope of ETRB vs. Irradiance curves (αB) and light saturation parameter (Ek), indicating that the communities were acclimated to stress conditions (i.e. high PAR and UVR dose and low nutrient availability). However, the in situ primary productivity was unaffected; on contrary, both PPCB and ETRBin situ increased with respect to the values obtained for communities growing at CM depth. Furthermore, ΦETR,C (i.e. the molar ratio of transported e− to assimilated carbon) in surface samples was similar to CM samples (8.0 ± 3.5 compared with 7.5 ± 5.3 mol e− [mol−1 C], respectively). The analysed phytoplankton communities were mainly dominated by diatom. This corroborates that diatoms possess a great capacity to cope with high irradiance levels, even at low nutrient concentrations registered during this study at surface waters.

ACS Style

Jesús M. Mercado; Dolores Cortés; Soluna Salles; Teodoro Ramírez; Félix.L. Figueroa; María Segovia; Nathalie Korbee; Esperanza Liger; Juan M. Medina-Sánchez; Cristina Durán; Presentación Carrillo. Short term primary production in western Mediterranean Sea phytoplankton communities subjected to the combined stress of high irradiance and low nutrients during summer stratification. Continental Shelf Research 2019, 186, 48 -63.

AMA Style

Jesús M. Mercado, Dolores Cortés, Soluna Salles, Teodoro Ramírez, Félix.L. Figueroa, María Segovia, Nathalie Korbee, Esperanza Liger, Juan M. Medina-Sánchez, Cristina Durán, Presentación Carrillo. Short term primary production in western Mediterranean Sea phytoplankton communities subjected to the combined stress of high irradiance and low nutrients during summer stratification. Continental Shelf Research. 2019; 186 ():48-63.

Chicago/Turabian Style

Jesús M. Mercado; Dolores Cortés; Soluna Salles; Teodoro Ramírez; Félix.L. Figueroa; María Segovia; Nathalie Korbee; Esperanza Liger; Juan M. Medina-Sánchez; Cristina Durán; Presentación Carrillo. 2019. "Short term primary production in western Mediterranean Sea phytoplankton communities subjected to the combined stress of high irradiance and low nutrients during summer stratification." Continental Shelf Research 186, no. : 48-63.

Journal article
Published: 24 May 2019 in Estuarine, Coastal and Shelf Science
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A local upwelling process is observed in the mouth of the Bay of Algeciras showing a singular pattern, partially disengaged of the neighboring coastal upwelling variability. The physical mechanisms which drive this local upwelling are not clear, but the Ekman pumping seems to be the most important forcing factor. The surface chlorophyll-a variability associated with this local upwelling is uncorrelated with the concentration registered in the inner Bay of Algeciras or in the surrounding coastal and shelf waters. Secondary, the emerged waters in the mouth of the Bay of Algeciras flow eastwards into the northwestern Alboran Sea dragged by the northern edge of the Atlantic Jet, forming a narrow and elongated nutrient-enriched area (hereafter called filament) usually detached from the coast. A sampling station located at 14.6 km from the coastline and 68 km far from the mouth of the Bay of Algeciras was employed to monitor the presence of the filament in the Alboran Sea. The filament is most frequently presented during the summer (in fact, it was detectable in more than 50% of the days of august). When the filament is distinguishable, its chlorophyll-a concentration doubles in average the values registered in neighboring locations, and in annual average also higher nitrate and phosphate surface concentrations (about 30%) are registered at the filament location. These results indicate that the filament provides nutrients to the surface waters of Alboran not only when it is optically detected. Our analyses indicate that the trajectory of the filament follows the northern edge of the western gyre of Alboran although its width and speed are variable depending on the Atlantic Jet properties and the related sub-mesoscale activity.

ACS Style

Francisco J. Gómez-Jakobsen; Jesús M. Mercado; Dolores Cortés; Lidia Yebra; Soluna Salles. A first description of the summer upwelling off the Bay of Algeciras and its role in the northwestern Alboran Sea. Estuarine, Coastal and Shelf Science 2019, 225, 106230 .

AMA Style

Francisco J. Gómez-Jakobsen, Jesús M. Mercado, Dolores Cortés, Lidia Yebra, Soluna Salles. A first description of the summer upwelling off the Bay of Algeciras and its role in the northwestern Alboran Sea. Estuarine, Coastal and Shelf Science. 2019; 225 ():106230.

Chicago/Turabian Style

Francisco J. Gómez-Jakobsen; Jesús M. Mercado; Dolores Cortés; Lidia Yebra; Soluna Salles. 2019. "A first description of the summer upwelling off the Bay of Algeciras and its role in the northwestern Alboran Sea." Estuarine, Coastal and Shelf Science 225, no. : 106230.

Journal article
Published: 16 May 2019 in Marine Ecology Progress Series
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ACS Style

L Yebra; A Hernández De Rojas; N Valcárcel-Pérez; Mc Castro; C García-Gómez; D Cortés; Jm Mercado; R Laiz-Carrión; A García; F Gómez-Jakobsen; A Uriarte; Jm Rodríguez; Jose Mª Quintanilla. Molecular identification of the diet of Sardina pilchardus larvae in the SW Mediterranean Sea. Marine Ecology Progress Series 2019, 617-618, 41 -52.

AMA Style

L Yebra, A Hernández De Rojas, N Valcárcel-Pérez, Mc Castro, C García-Gómez, D Cortés, Jm Mercado, R Laiz-Carrión, A García, F Gómez-Jakobsen, A Uriarte, Jm Rodríguez, Jose Mª Quintanilla. Molecular identification of the diet of Sardina pilchardus larvae in the SW Mediterranean Sea. Marine Ecology Progress Series. 2019; 617-618 ():41-52.

Chicago/Turabian Style

L Yebra; A Hernández De Rojas; N Valcárcel-Pérez; Mc Castro; C García-Gómez; D Cortés; Jm Mercado; R Laiz-Carrión; A García; F Gómez-Jakobsen; A Uriarte; Jm Rodríguez; Jose Mª Quintanilla. 2019. "Molecular identification of the diet of Sardina pilchardus larvae in the SW Mediterranean Sea." Marine Ecology Progress Series 617-618, no. : 41-52.

Journal article
Published: 27 July 2018 in Progress in Oceanography
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The distribution of marine productivity in the Alboran Sea responds strongly to its hydrodynamics, shaped by the influence of the Atlantic jet that enters through the Gibraltar Strait. This stream originates an oligotrophic western anticyclonic gyre (WAG) that dominates the western basin of the Alboran Sea. We studied vertical (0-900 m) diel changes in zooplankton biomass, potential respiration (electron transport system activity, ETS) and growth rates (aminoacyl-tRNA synthetases activity, AARS), to assess their variability in relation to the WAG structure. Zooplankton biomass was distributed in distinctive layers and we observed strong diel vertical migrations in the open sea. Diel vertical migrant (DVM) zooplankton biomass, production and respiration rates doubled within the WAG core. The active carbon flux to mesopelagic waters mediated by DVM, estimated from respiration and mortality at depth, increased from the coast (2.0-5.7 mg C·m-2·d-1) towards the gyre core (27.1-76.7 mg C·m-2·d-1). The WAG enhanced the carbon export to deep waters, reinforcing the role of the Alboran Sea as sink of atmospheric carbon.

ACS Style

Lidia Yebra; Inma Herrera; Jesús M. Mercado; Dolores Cortés; Francisco José Gómez Jakobsen; Aitor Alonso; Antonio Sánchez Sánchez; Soluna Salles; Nerea Valcárcel-Pérez. Zooplankton production and carbon export flux in the western Alboran Sea gyre (SW Mediterranean). Progress in Oceanography 2018, 167, 64 -77.

AMA Style

Lidia Yebra, Inma Herrera, Jesús M. Mercado, Dolores Cortés, Francisco José Gómez Jakobsen, Aitor Alonso, Antonio Sánchez Sánchez, Soluna Salles, Nerea Valcárcel-Pérez. Zooplankton production and carbon export flux in the western Alboran Sea gyre (SW Mediterranean). Progress in Oceanography. 2018; 167 ():64-77.

Chicago/Turabian Style

Lidia Yebra; Inma Herrera; Jesús M. Mercado; Dolores Cortés; Francisco José Gómez Jakobsen; Aitor Alonso; Antonio Sánchez Sánchez; Soluna Salles; Nerea Valcárcel-Pérez. 2018. "Zooplankton production and carbon export flux in the western Alboran Sea gyre (SW Mediterranean)." Progress in Oceanography 167, no. : 64-77.

Original articles
Published: 17 July 2018 in International Journal of Remote Sensing
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The utility of global and regional algorithms for retrieving surface chlorophyll-a values from satellite images of MODIS (Moderate-Resolution Imaging Spectroradiometer) onboard Aqua and Terra Satellites, SeaWiFS (Sea-Viewing Wide Field-of-View Sensor), MERIS (MEdium Resolution Imaging Spectrometer) and VIIRS (Visible Infrared Imaging Radiometer Suite) is tested in a wide region of the Western Mediterranean Sea, the Spanish Mediterranean. The comparison between chlorophyll-a concentration obtained from samples collected and satellite concentrations calculated with global and regional algorithms for this area demonstrates that satellites overestimate the surface chlorophyll-a. In this work, a set of new algorithms, namely SMED (Spanish MEDiterranean algorithms), are proposed to improve the estimations of surface chlorophyll-a in our study area. The SMED set of algorithms employs the linear function to fit the standard Maximum Band Ratios (MBR) to the in situ surface chlorophyll-a concentration (in logarithmic scale). The implementation of the SMED algorithms is simple, and the accuracy is as good as more complex algorithms like OC5 (5 band algorithms tuned for European Atlantic and tested successfully in the Mediterranean Sea). The improvement of SMED algorithms is important respect to MedOC (built based in data of the Mediterranean Sea) for all sensors, ranging 17%-37% in terms of the coefficient of determination (R2). In the case of OC algorithms (standard global algorithms currently operative for most ocean colour sensors), SMED also improves the estimates in 11%-22%, except in 4% for MERIS. Additionally, when comparing satellite estimates with in situ chlorophyll-a in log-log scale, SMED achieved the best correspondence, even with respect to OC5. During the calibration procedure MERIS remote sensing reflectances (RRS) showed a higher sensitivity to the presence of mineral aerosols, and therefore it is strongly recommended to include the value of Aerosol Optical Thickness (AOT) in the algorithms for chlorophyll in the region under study. A regional algorithm for VIIRS ocean colour sensor is also proposed based on a matchup database built from spatially and temporary distributed SMED chlorophyll-a values of MODIS-Aqua and VIIRS RRS. Our analysis suggests that SeaWiFS, MODIS-Aqua, and VIIRS based SMED algorithms can support generating a multiplatform time series in the region.

ACS Style

Francisco J. Gómez Jakobsen; Jesús M. Mercado; Mari Luz Tovar-Salvador; Dolores Cortés; Lidia Yebra; Soluna Salles; Antonio Sánchez Sánchez; Nerea Valcárcel-Pérez; Aitor Alonso. New algorithms for estimating chlorophyll-a in the Spanish waters of the Western Mediterranean Sea from multiplatform imagery. International Journal of Remote Sensing 2018, 39, 8837 -8858.

AMA Style

Francisco J. Gómez Jakobsen, Jesús M. Mercado, Mari Luz Tovar-Salvador, Dolores Cortés, Lidia Yebra, Soluna Salles, Antonio Sánchez Sánchez, Nerea Valcárcel-Pérez, Aitor Alonso. New algorithms for estimating chlorophyll-a in the Spanish waters of the Western Mediterranean Sea from multiplatform imagery. International Journal of Remote Sensing. 2018; 39 (23):8837-8858.

Chicago/Turabian Style

Francisco J. Gómez Jakobsen; Jesús M. Mercado; Mari Luz Tovar-Salvador; Dolores Cortés; Lidia Yebra; Soluna Salles; Antonio Sánchez Sánchez; Nerea Valcárcel-Pérez; Aitor Alonso. 2018. "New algorithms for estimating chlorophyll-a in the Spanish waters of the Western Mediterranean Sea from multiplatform imagery." International Journal of Remote Sensing 39, no. 23: 8837-8858.

Journal article
Published: 14 July 2018 in Water
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In the Bay of Algeciras (BA), intensive urban and industrial activityis underway, which is potentially responsible for the release of significant quantities of nutrients. However, the assessment of the impact of these discharges is complex. Nutrient concentration in the surface layer is per se strongly variable due to the variability associated with the upwelling of nutrient-enriched deep Mediterranean water (MW), which in turn is regulated by atmospheric forcing. The aim of this study is to determine the effects of changes in the upwelling intensity on the load of nitrate and phosphate in the BA and to appraise their impact on chlorophyll a variability. Based on this analysis, the possible influence of the nutrients released from land-based sources is indirectly inferred. Data and samples collected during nine research cruises carried out in different seasonal cycle periods between 2010 and 2015 in the BA were analysed. The vertical variation of temperature and salinity indicates that the MW upwelling was favoured in spring, as occurred in other coastal areas of the northern Alboran Sea. However, principal component analysis conducted on physical and chemical data reveals that shifts in nutrients and chlorophyll a in the euphotic layer are poorly explained by changes in the upwelling intensity. Furthermore, during some of these research surveys (particularly in summer), chlorophyll a concentrations were higher in the BA as compared to a nearby coastal area also affected by MW upwelling. Scarce information about land-based pollution sources precludes quantitative analysis of the impact of nutrient loads on water quality; however, the available data suggest that the main source of allochthanous inorganic nitrogen over the period 2010–2015 in the BA was nitrate. Therefore, it is reasonable to hypothesize that the high concentrations of nitrate and chlorophyll a in BA in summer are a consequence of those discharges. Our study highlights the need of more exhaustive inventories of sewage and river discharges to adequately rate their impact in the BA.

ACS Style

Jesús M. Mercado; Pablo León; Soluna Salles; Dolores Cortés; Lidia Yebra; Francisco Gómez-Jakobsen; Inma Herrera; Aitor Alonso; Antonio Sánchez Sánchez; Nerea Valcárcel-Pérez; Sébastien Putzeys. Time Variability Patterns of Eutrophication Indicators in the Bay of Algeciras (South Spain). Water 2018, 10, 938 .

AMA Style

Jesús M. Mercado, Pablo León, Soluna Salles, Dolores Cortés, Lidia Yebra, Francisco Gómez-Jakobsen, Inma Herrera, Aitor Alonso, Antonio Sánchez Sánchez, Nerea Valcárcel-Pérez, Sébastien Putzeys. Time Variability Patterns of Eutrophication Indicators in the Bay of Algeciras (South Spain). Water. 2018; 10 (7):938.

Chicago/Turabian Style

Jesús M. Mercado; Pablo León; Soluna Salles; Dolores Cortés; Lidia Yebra; Francisco Gómez-Jakobsen; Inma Herrera; Aitor Alonso; Antonio Sánchez Sánchez; Nerea Valcárcel-Pérez; Sébastien Putzeys. 2018. "Time Variability Patterns of Eutrophication Indicators in the Bay of Algeciras (South Spain)." Water 10, no. 7: 938.

Journal article
Published: 21 March 2018 in Aquatic Microbial Ecology
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ACS Style

C Johnstone; S Salles; Jm Mercado; D Cortes; L Yebra; F Gómez-Jakobsen; Antonio Sánchez Sánchez; A Alonso; N Valcárcel-Pérez. Abundance of virus-like particles (VLPs) and microbial plankton community composition in a Mediterranean Sea coastal area. Aquatic Microbial Ecology 2018, 81, 137 -148.

AMA Style

C Johnstone, S Salles, Jm Mercado, D Cortes, L Yebra, F Gómez-Jakobsen, Antonio Sánchez Sánchez, A Alonso, N Valcárcel-Pérez. Abundance of virus-like particles (VLPs) and microbial plankton community composition in a Mediterranean Sea coastal area. Aquatic Microbial Ecology. 2018; 81 (2):137-148.

Chicago/Turabian Style

C Johnstone; S Salles; Jm Mercado; D Cortes; L Yebra; F Gómez-Jakobsen; Antonio Sánchez Sánchez; A Alonso; N Valcárcel-Pérez. 2018. "Abundance of virus-like particles (VLPs) and microbial plankton community composition in a Mediterranean Sea coastal area." Aquatic Microbial Ecology 81, no. 2: 137-148.

Journal article
Published: 01 March 2017 in Estuarine, Coastal and Shelf Science
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The influence of hydrochemistry and trophic conditions on the coastal zooplankton community metabolic rates was investigated along the southeastern Spanish coast, from Algeciras to Cartagena. Zooplankton metabolism was assessed from measurements of gut fluorescence (GF), electron transport system (ETS) and aminoacyl-tRNA synthetases (AARS) activities. Zooplankton had higher biomass specific respiration and growth rates in the Mediterranean stations to the East, driven by warmer seawater temperatures. However, zooplankton biomass and abundance were significantly higher in the Alboran Sea and, consequently, the zooplankton community in these coastal waters presented the highest production rates of the study area and among the highest of the Mediterranean Sea.We observed that summer zooplankton production variability was driven by the trophic conditions rather than by the hydrological variability.Versión del edito

ACS Style

Lidia Yebra; Sébastien Putzeys; Dolores Cortés; Jesús M. Mercado; Francisco José Gómez Jakobsen; Pablo León; Soluna Salles; Inma Herrera. Trophic conditions govern summer zooplankton production variability along the SE Spanish coast (SW Mediterranean). Estuarine, Coastal and Shelf Science 2017, 187, 134 -145.

AMA Style

Lidia Yebra, Sébastien Putzeys, Dolores Cortés, Jesús M. Mercado, Francisco José Gómez Jakobsen, Pablo León, Soluna Salles, Inma Herrera. Trophic conditions govern summer zooplankton production variability along the SE Spanish coast (SW Mediterranean). Estuarine, Coastal and Shelf Science. 2017; 187 ():134-145.

Chicago/Turabian Style

Lidia Yebra; Sébastien Putzeys; Dolores Cortés; Jesús M. Mercado; Francisco José Gómez Jakobsen; Pablo León; Soluna Salles; Inma Herrera. 2017. "Trophic conditions govern summer zooplankton production variability along the SE Spanish coast (SW Mediterranean)." Estuarine, Coastal and Shelf Science 187, no. : 134-145.

Journal article
Published: 01 December 2016 in Remote Sensing of Environment
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ACS Style

Jesús M. Mercado; Francisco Gómez-Jakobsen; Dolores Cortés; Lidia Yebra; Soluna Salles; Pablo León; Sébastien Putzeys. A method based on satellite imagery to identify spatial units for eutrophication management. Remote Sensing of Environment 2016, 186, 123 -134.

AMA Style

Jesús M. Mercado, Francisco Gómez-Jakobsen, Dolores Cortés, Lidia Yebra, Soluna Salles, Pablo León, Sébastien Putzeys. A method based on satellite imagery to identify spatial units for eutrophication management. Remote Sensing of Environment. 2016; 186 ():123-134.

Chicago/Turabian Style

Jesús M. Mercado; Francisco Gómez-Jakobsen; Dolores Cortés; Lidia Yebra; Soluna Salles; Pablo León; Sébastien Putzeys. 2016. "A method based on satellite imagery to identify spatial units for eutrophication management." Remote Sensing of Environment 186, no. : 123-134.

Journal article
Published: 01 June 2016 in Journal of Sea Research
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The Alboran Sea is a highly dynamic basin which exhibits a high spatio-temporal variability of hydrographic structures (e.g. fronts, gyres, coastal upwellings). This work compares the abundance and composition of picophytoplankton observed across the northern Alboran Sea among eleven cruises between 2008 and 2012 using flow cytometry. We evaluate the seasonal and longitudinal variability of picophytoplankton on the basis of the circulation regimes at a regional scale and explore the presence of cyanobacteria ecotypes in the basin. The maximal abundances obtained for Prochlorococcus, Synechococcus and picoeukaryotes (12.7 × 104, 13.9 × 104 and 8.6 × 104 cells mL-1 respectively) were consistent with those reported for other adjacent marine areas. Seasonal changes in the abundance of the three picophytoplankton groups were highly significant although they did not match the patterns described for other coastal waters. Higher abundances of Prochlorococcus were obtained in autumn-winter while Synechococcus and picoeukaryotes exhibited a different seasonal abundance pattern depending on the sector (e.g. Synechococcus showed higher abundance in summer in the west sector and during winter in the eastern study area). Additionally, conspicuous longitudinal gradients were observed for Prochlorococcus and Synechococcus, with Prochlorococcus decreasing from west to east and Synechococcus following the opposite pattern. The analysis of environmental variables (i.e. temperature, salinity and inorganic nutrients) and cell abundances indicates that Prochlorococcus preferred high salinity and nitrate to phosphate ratio. On the contrary, temperature did not seem to play a role in Prochlorococcus distribution as it was numerically important during the whole seasonal cycle. Variability in Synechococcus abundance could not be explained by changes in any environmental variable suggesting that different ecotypes were sampled during the surveys. In particular, our data would indicate the presence of at least two ecotypes of Synechococcus: a summer ecotype widely distributed in the whole Alboran Sea and a winter ecotype adapted to lower temperature and higher nutrient concentration whose growth is favoured in the eastern sector.

ACS Style

Ana Luisa Amorim; Pablo León; Jesús M. Mercado; Dolores Cortés; Francisco Gómez; Sébastien Putzeys; Soluna Salles; Lidia Yebra. Controls of picophytoplankton abundance and composition in a highly dynamic marine system, the Northern Alboran Sea (Western Mediterranean). Journal of Sea Research 2016, 112, 13 -22.

AMA Style

Ana Luisa Amorim, Pablo León, Jesús M. Mercado, Dolores Cortés, Francisco Gómez, Sébastien Putzeys, Soluna Salles, Lidia Yebra. Controls of picophytoplankton abundance and composition in a highly dynamic marine system, the Northern Alboran Sea (Western Mediterranean). Journal of Sea Research. 2016; 112 ():13-22.

Chicago/Turabian Style

Ana Luisa Amorim; Pablo León; Jesús M. Mercado; Dolores Cortés; Francisco Gómez; Sébastien Putzeys; Soluna Salles; Lidia Yebra. 2016. "Controls of picophytoplankton abundance and composition in a highly dynamic marine system, the Northern Alboran Sea (Western Mediterranean)." Journal of Sea Research 112, no. : 13-22.

Journal article
Published: 18 March 2016 in International Journal of Remote Sensing
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The utility of three different algorithms for retrieving surface chlorophyll-a values from satellite images of MODIS-Aqua is tested in the northern Alboran Sea. The available global algorithm to calculate chlorophyll-a from reflectance of MODIS-Aqua OC3M overestimates the surface chlorophyll-a in the study area. Another regional algorithm specifically developed for the Mediterranean Sea MedOC3 improves the estimates although the best outcome is obtained with OC5, which was developed for Atlantic coastal waters. The three tested algorithms perform worse at in situ chlorophyll-a concentrations higher than 1 mg m−3 and exhibit uncertainty levels higher than 35% for this range of concentrations. A new algorithm ALBOC3 is proposed which produces a good estimation of the in situ chlorophyll-a for the whole range of concentrations normally registered in the study area 0.1–3.5 mg m−3. We hypothesize that the particular bio-optical features of the northern Alboran Sea phytoplankton explain the poor functioning of the published algorithms that have been tested in this work.

ACS Style

Francisco José Gómez Jakobsen; Jesús M. Mercado; Dolores Cortés; Teodoro Ramírez; Soluna Salles; Lidia Yebra. A new regional algorithm for estimating chlorophyll-ain the Alboran Sea (Mediterranean Sea) from MODIS-Aqua satellite imagery. International Journal of Remote Sensing 2016, 37, 1431 -1444.

AMA Style

Francisco José Gómez Jakobsen, Jesús M. Mercado, Dolores Cortés, Teodoro Ramírez, Soluna Salles, Lidia Yebra. A new regional algorithm for estimating chlorophyll-ain the Alboran Sea (Mediterranean Sea) from MODIS-Aqua satellite imagery. International Journal of Remote Sensing. 2016; 37 (6):1431-1444.

Chicago/Turabian Style

Francisco José Gómez Jakobsen; Jesús M. Mercado; Dolores Cortés; Teodoro Ramírez; Soluna Salles; Lidia Yebra. 2016. "A new regional algorithm for estimating chlorophyll-ain the Alboran Sea (Mediterranean Sea) from MODIS-Aqua satellite imagery." International Journal of Remote Sensing 37, no. 6: 1431-1444.

Journal article
Published: 20 November 2014 in Aquatic Biology
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Earth is currently experiencing rapid changes in climate, associated with anthropogenic activities, which have the potential to have significant effects on aquatic ecosystems. The 9th International Workshop of the Group for Aquatic Primary Productivity (GAP9) assessed the effects of environmental factors on physiological performance and primary productivity of microand macroalgae. This Introduction summarizes the activities and main findings of the 4 workgroups of GAP9 as published in this Theme Section of Aquatic Biology.Versión del edito

ACS Style

Fl Figueroa; Jesús M. Mercado; J Beardall; Pj Neale; V Montecino; Jc Kromkamp. Introduction. Aquatic Biology 2014, 22, 1 -4.

AMA Style

Fl Figueroa, Jesús M. Mercado, J Beardall, Pj Neale, V Montecino, Jc Kromkamp. Introduction. Aquatic Biology. 2014; 22 ():1-4.

Chicago/Turabian Style

Fl Figueroa; Jesús M. Mercado; J Beardall; Pj Neale; V Montecino; Jc Kromkamp. 2014. "Introduction." Aquatic Biology 22, no. : 1-4.

Journal article
Published: 20 November 2014 in Aquatic Biology
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Jesús M. Mercado; Cristina Sobrino; Pj Neale; M Segovia; Andreas Reul; Ana Luisa Amorim; Presentación Carrillo; P Claquin; Marco Jabalera Cabrerizo; P León; Lorenzo; Jm Medina-Sánchez; V Montecino; C Napoléon; Ondrej Prasil; Sébastien Putzeys; S Salles; Lidia Yebra. Effect of CO2, nutrients and light on coastal plankton. II. Metabolic rates. Aquatic Biology 2014, 22, 43 -57.

AMA Style

Jesús M. Mercado, Cristina Sobrino, Pj Neale, M Segovia, Andreas Reul, Ana Luisa Amorim, Presentación Carrillo, P Claquin, Marco Jabalera Cabrerizo, P León, Lorenzo, Jm Medina-Sánchez, V Montecino, C Napoléon, Ondrej Prasil, Sébastien Putzeys, S Salles, Lidia Yebra. Effect of CO2, nutrients and light on coastal plankton. II. Metabolic rates. Aquatic Biology. 2014; 22 ():43-57.

Chicago/Turabian Style

Jesús M. Mercado; Cristina Sobrino; Pj Neale; M Segovia; Andreas Reul; Ana Luisa Amorim; Presentación Carrillo; P Claquin; Marco Jabalera Cabrerizo; P León; Lorenzo; Jm Medina-Sánchez; V Montecino; C Napoléon; Ondrej Prasil; Sébastien Putzeys; S Salles; Lidia Yebra. 2014. "Effect of CO2, nutrients and light on coastal plankton. II. Metabolic rates." Aquatic Biology 22, no. : 43-57.

Journal article
Published: 20 November 2014 in Aquatic Biology
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Cristina Sobrino; M Segovia; Pj Neale; Jesús M. Mercado; Candela García-Gómez; G Kulk; Lorenzo; T Camarena; Wh Van De Poll; K Spilling; Z Ruan. Effect of CO2, nutrients and light on coastal plankton. IV. Physiological responses. Aquatic Biology 2014, 22, 77 -93.

AMA Style

Cristina Sobrino, M Segovia, Pj Neale, Jesús M. Mercado, Candela García-Gómez, G Kulk, Lorenzo, T Camarena, Wh Van De Poll, K Spilling, Z Ruan. Effect of CO2, nutrients and light on coastal plankton. IV. Physiological responses. Aquatic Biology. 2014; 22 ():77-93.

Chicago/Turabian Style

Cristina Sobrino; M Segovia; Pj Neale; Jesús M. Mercado; Candela García-Gómez; G Kulk; Lorenzo; T Camarena; Wh Van De Poll; K Spilling; Z Ruan. 2014. "Effect of CO2, nutrients and light on coastal plankton. IV. Physiological responses." Aquatic Biology 22, no. : 77-93.

Journal article
Published: 20 November 2014 in Aquatic Biology
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We investigated the impacts of climate change-associated abiotic factors on the species composition and size structure of coastal phytoplankton communities. Surface coastal water collected off the coast of Málaga (Spain) was incubated outdoors during a 7 d microcosm experi - ment. The natural phytoplankton communities were exposed to high and low conditions of CO2, nutrients and light. During the first 2 d, a positive response to increased CO2 and nutrient concentration was observed in terms of abundance and chlorophyll in all size fractions (20 μm). After 2 d, a trophic cascade effect was observed within the phytoplankton communities for all treatments. The absence of mesozooplankton led to an increase in microzooplankton abundance, which coincided with a decrease in the abundance of phytoplankton 20 μm ESD showed a positive response to the effects of increasing CO2 and nutrient concentration. These results high - light the importance of trophic interactions other than abiotic factors such as CO2 and nutrient availability in shaping the size structure of Mediterranean phytoplankton. More specifically, this work shows the importance of trophic cascade effects in scaling the plankton SAS and should be considered in both enclosure experiments and field measurements that deal with size distribution.Versión del edito

ACS Style

Andreas Reul; M. Muñoz; B. Bautista; P. J. Neale; Cristina Sobrino; Jesús M. Mercado; M. Segovia; S. Salles; G. Kulk; P. León; W. H. Van De Poll; E. Pérez; A. Buma; J. M. Blanco. Effect of CO2, nutrients and light on coastal plankton. III. Trophic cascade, size structure and composition. Aquatic Biology 2014, 22, 59 -76.

AMA Style

Andreas Reul, M. Muñoz, B. Bautista, P. J. Neale, Cristina Sobrino, Jesús M. Mercado, M. Segovia, S. Salles, G. Kulk, P. León, W. H. Van De Poll, E. Pérez, A. Buma, J. M. Blanco. Effect of CO2, nutrients and light on coastal plankton. III. Trophic cascade, size structure and composition. Aquatic Biology. 2014; 22 ():59-76.

Chicago/Turabian Style

Andreas Reul; M. Muñoz; B. Bautista; P. J. Neale; Cristina Sobrino; Jesús M. Mercado; M. Segovia; S. Salles; G. Kulk; P. León; W. H. Van De Poll; E. Pérez; A. Buma; J. M. Blanco. 2014. "Effect of CO2, nutrients and light on coastal plankton. III. Trophic cascade, size structure and composition." Aquatic Biology 22, no. : 59-76.

Journal article
Published: 20 November 2014 in Aquatic Biology
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Pj Neale; Cristina Sobrino; M Segovia; Jesús M. Mercado; P Leon; Cortés; P Tuite; A Picazo; S Salles; Marco Jabalera Cabrerizo; Ondrej Prasil; V Montecino; Andreas Reul; Antonio Fuentes-Lema. Effect of CO2, nutrients and light on coastal plankton. I. Abiotic conditions and biological responses. Aquatic Biology 2014, 22, 25 -41.

AMA Style

Pj Neale, Cristina Sobrino, M Segovia, Jesús M. Mercado, P Leon, Cortés, P Tuite, A Picazo, S Salles, Marco Jabalera Cabrerizo, Ondrej Prasil, V Montecino, Andreas Reul, Antonio Fuentes-Lema. Effect of CO2, nutrients and light on coastal plankton. I. Abiotic conditions and biological responses. Aquatic Biology. 2014; 22 ():25-41.

Chicago/Turabian Style

Pj Neale; Cristina Sobrino; M Segovia; Jesús M. Mercado; P Leon; Cortés; P Tuite; A Picazo; S Salles; Marco Jabalera Cabrerizo; Ondrej Prasil; V Montecino; Andreas Reul; Antonio Fuentes-Lema. 2014. "Effect of CO2, nutrients and light on coastal plankton. I. Abiotic conditions and biological responses." Aquatic Biology 22, no. : 25-41.

Journal article
Published: 03 March 2014 in Marine Ecology Progress Series
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Jesús M. Mercado; Iria Sala; S Salles; D Cortes; Teodoro Ramírez; E Liger; Lidia Yebra; B Bautista. Effects of community composition and size structure on light absorption and nutrient uptake of phytoplankton in contrasting areas of the Alboran Sea. Marine Ecology Progress Series 2014, 499, 47 -64.

AMA Style

Jesús M. Mercado, Iria Sala, S Salles, D Cortes, Teodoro Ramírez, E Liger, Lidia Yebra, B Bautista. Effects of community composition and size structure on light absorption and nutrient uptake of phytoplankton in contrasting areas of the Alboran Sea. Marine Ecology Progress Series. 2014; 499 ():47-64.

Chicago/Turabian Style

Jesús M. Mercado; Iria Sala; S Salles; D Cortes; Teodoro Ramírez; E Liger; Lidia Yebra; B Bautista. 2014. "Effects of community composition and size structure on light absorption and nutrient uptake of phytoplankton in contrasting areas of the Alboran Sea." Marine Ecology Progress Series 499, no. : 47-64.

Book chapter
Published: 06 July 2013 in The Handbook of Environmental Chemistry
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Seagrasses are flowering plants that undergo their whole life cycle within shallow coastal habitats. All species share analogous architectural and growth patterns. They are modular plants composed of units arranged by a set of modules: a piece of rhizome, a bundle of leaves (shoot) attached to the rhizome and roots. Four species occur in the Mediterranean bioregion: the endemic Posidonia oceanica, the tropical Cymodocea nodosa and the temperates Zostera marina and Z. noltii. Posidonia oceanica is the largest one, with very slow growth rates and being considered the climax stage of Mediterranean subtidal bottoms. Meadows extend on 2.5–4.5 millions ha that is close to 25 % of the Mediterranean basin shallower than 50 m. Cymodocea nodosa, Zostera marina and, particularly, Z. noltii are smaller in size but fast growing as typical of the pioneering species. Seagrass meadows are among the most productive ecosystems on earth, providing important ecological services: nursery grounds, biofilters, water cleaners, coastline protectors and carbon sinks. However, despite its paramount importance there is widespread regression of such habitats. Although the four Mediterranean species have been assigned to the “Least Concern” category of the IUCN Red List, P. oceanica populations are experiencing the highest rate of decrease. Given the extremely slow growth rate of this species such losses are virtually irreversible. Direct and indirect (i.e., climate change) human activities affecting mostly to physical integrity of habitats, sediment and water quality, coastal sedimentary balance or species composition are argued to be the main drivers of seagrass decline in the Mediterranean Sea. European (and Mediterranean) countries, aware of the key important role that seagrasses play, have established management and conservation plans for these habitats. Thereafter, the aim of the present contribution is to present basic information about the biology and ecology of the Mediterranean seagrasses, the main threats facing these habitats, as well as to provide some information on the main conservation and management strategies.

ACS Style

Jose Lucas Perez-Llorens; Juan J. Vergara; Irene Olivé; Jesús M. Mercado; Rafael Conde-Álvarez; Angel Pérez-Ruzafa; Félix L. Figueroa. Autochthonous Seagrasses. The Handbook of Environmental Chemistry 2013, 137 -158.

AMA Style

Jose Lucas Perez-Llorens, Juan J. Vergara, Irene Olivé, Jesús M. Mercado, Rafael Conde-Álvarez, Angel Pérez-Ruzafa, Félix L. Figueroa. Autochthonous Seagrasses. The Handbook of Environmental Chemistry. 2013; ():137-158.

Chicago/Turabian Style

Jose Lucas Perez-Llorens; Juan J. Vergara; Irene Olivé; Jesús M. Mercado; Rafael Conde-Álvarez; Angel Pérez-Ruzafa; Félix L. Figueroa. 2013. "Autochthonous Seagrasses." The Handbook of Environmental Chemistry , no. : 137-158.