A5042115291- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Ocean Acidification Effects and Responses
- Marine Bivalve and Aquaculture Studies
- Oceanographic and Atmospheric Processes
- Microbial Fuel Cells and Bioremediation
- Coastal and Marine Management
- Calcium Carbonate Crystallization and Inhibition
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
- Protist diversity and phylogeny
- Methane Hydrates and Related Phenomena
- Environmental Impact and Sustainability
- Ionosphere and magnetosphere dynamics
- Marine and fisheries research
- Polar Research and Ecology
- Vehicle emissions and performance
- International Relations in Latin America
- Cruise Tourism Development and Management
- Microbial Metabolic Engineering and Bioproduction
- Geology and Paleoclimatology Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Genomics and Phylogenetic Studies
- Earthquake Detection and Analysis
Universidad de Las Palmas de Gran Canaria
2014-2024
Abstract Recent findings indicate that N 2 fixation is significant in aphotic waters, presumably due to heterotrophic diazotrophs depending on organic matter for their nutrition. However, the relationship between and remains unknown. Here we explore deep chlorophyll maximum underneath waters across whole Mediterranean Sea relate it composition, characterized by optical molecular methods. Our rates were range of those previously reported euphotic zone (up 0.43 nmol L −1 d ) significantly...
Abstract. Eastern boundary upwelling systems (EBUS) are among the most productive marine ecosystems on Earth. The production of organic material is fueled by nutrient-rich deep waters and high incident light at sea surface. However, biotic abiotic factors can modify surface related biogeochemical processes. Determining these important because EBUS considered hotspots climate change, reliable predictions their future functioning requires understanding mechanisms driving cycles therein. In...
Reduction of anthropogenic CO 2 emissions alone will not sufficiently restrict global warming and enable the 1.5°C goal Paris agreement to be met. To effectively counteract climate change, measures actively remove carbon dioxide from atmosphere are required. Artificial upwelling has been proposed as one such removal technique. By fueling primary productivity in surface ocean with nutrient-rich deep water, it could potentially enhance downward fluxes particulate organic (POC) sequestration....
Abstract. Ocean alkalinity enhancement (OAE) is a negative emissions technology (NET) that shows significant potential for climate change mitigation. By increasing the bicarbonate ion concentration in ocean water, OAE could enhance long-term carbon storage and mitigate acidification. However, side effects and/or co-benefits of on natural planktonic communities remain poorly understood. To address this knowledge gap, mesocosm experiment was conducted oligotrophic waters Gran Canaria. A...
Diatoms are silicifying phytoplankton contributing about one quarter to primary production on Earth. Ocean acidification (OA) could alter the competitiveness of diatoms relative other taxa and/or lead shifts among diatom species. In spring 2016, we set up a plankton community experiment at coast Gran Canaria (Canary Islands, Spain) investigate response subtropical assemblages elevated seawater pCO2. Therefore, natural communities were enclosed for 32 days in situ mesocosms (~8 m3 volume)...
Cyclonic and anticyclonic eddies are common mesoscale features in the flow past Canary Islands throughout year. While drifting southwards, eddy pairs interact among them but also with upwelling filaments generated at coastal jet of nearby African system. These interactions force generation frontal zones where ageostrophic secondary circulation (ASC) may occur. With aim contributing to understand how meso-submesoscale modulate plankton distribution, we carried out an interdisciplinary cruise...
The subtropical oceans are home to one of the largest ecosystems on Earth, contributing nearly third global oceanic primary production. Ocean warming leads enhanced stratification in oligotrophic ocean but also intensification cross-shore wind gradients and thus eddy kinetic energy across eastern boundary regions gyres. Phytoplankton thriving a future warmer with CO2 levels could therefore be patchily fertilized by increased mesoscale submesoscale variability inducing nutrient pumping into...
Organic matter is known to influence community composition and metabolism of marine prokaryotes. However, few studies have addressed this linkage in the deep ocean. We studied relationship between fluorescent dissolved organic prokaryotic meso- bathypelagic water masses along a surface productivity gradient crossing subtropical tropical Atlantic Ocean. Four fluorescence components were identified, three humic-like one protein-like. The distributions significantly explained by mass mixing,...
Artificial upwelling has been proposed as a means of enhancing oceanic CO 2 sequestration and/or raising fishery yields through an increase in primary production unproductive parts the ocean. However, evidence its efficacy, applicability and side effects is scarce. Here we present part results 37-day mesocosm study conducted oligotrophic waters off coast Gran Canaria. The goal was to assess situ artificial on pelagic community. Upwelling simulated via two modes: i) singular deep-water pulse...
The enzymatic electron transport system (ETS) assay is frequently used as a proxy of respiratory activity in planktonic communities. It thought to estimate the maximum overall enzymes associated with ETS systems both eukaryotic and prokaryotic organisms. Thus, order derive actual respiration rates (R) from it necessary determine empirical R/ETS conversion algorithms. In this study we explore temporal development R natural plankton communities (from bacteria large phytoplankton) enclosed...
Plankton respiration (R) is a key factor governing the ocean carbon cycle. However, although supports respiratory activity throughout its entire volume, to our knowledge there are no studies that tackle both spatial and temporal variability of in dark dependence on organic sources. Here, we have studied epipelagic mesopelagic R via enzymatic electron transport system (ETS) microbial communities, along two zonal sections (21°N 26°N) extending from northwest African coastal upwelling...
In the surface ocean, microorganisms are both a source of extracellular H2O2 and, via production destroying enzymes, also one main sinks. Within microbial communities, sources and sinks may be unevenly distributed thus community structure could influence ambient concentrations. Yet biogeochemical cycling other reactive oxygen species is rarely investigated at level. Here we present time series concentrations during 28-day mesocosm experiment where pCO2 gradient (400-1450 µatm) was applied to...
Abstract Prokaryotes represent a major fraction of marine biomass and play key role in the global carbon cycle. We studied vertical profiles (0–3500 m) abundance, viability, activity prokaryotic communities along productivity gradient subtropical tropical Atlantic to assess whether there is linkage between surface regimes deep ocean communities. found that latitudinal changes patterns cytometric variables were coupled with productivity: higher abundances viabilities, smaller cell sizes...
Abstract. The Peruvian upwelling system is a highly productive ecosystem with large oxygen minimum zone (OMZ) close to the surface. In this work, we carried out mesocosm experiment off Callao, Peru, addition of water masses from regional OMZ collected at two different sites simulating scenarios. Here, focus on pelagic remineralization organic matter by extracellular enzyme activity leucine aminopeptidase (LAP) and alkaline phosphatase (APA). After water, dissolved inorganic nitrogen (N) was...
Abstract. Ocean Alkalinity Enhancement (OAE) is a Negative Emissions Technology (NET) that shows significant potential for climate change mitigation. By increasing the bicarbonate ion concentration in ocean water, OAE could enhance long-term carbon storage and mitigate acidification. However, side effects and/or co-benefits of on natural planktonic communities remain poorly understood. To address this knowledge gap, mesocosm experiment was conducted oligotrophic waters Gran Canaria. A...
Distributions of dissolved (DOM) and suspended (POM) organic matter, their chromophoric (CDOM) fluorescent (FDOM) fractions, are investigated at high resolution (< 10 km) in the Cape Verde Frontal Zone (CVFZ) during fall 2017. In epipelagic layer 200 m), meso- submesoscale structures (meanders, eddies) captured by sampling dictate tight coupling between physical biogeochemical parameters front. Remarkably, humic-like substances show relatively fluorescence intensities 50 150 m,...
Abstract. Upwelling of nutrient-rich waters into the sunlit surface layer ocean supports high primary productivity in eastern boundary upwelling systems (EBUSs). However, subsurface contain not only macronutrients (N, P, Si) but also micronutrients, organic matter and seed microbial communities that may modify response to macronutrient inputs via upwelling. These additional factors are often neglected when investigating impacts on productivity. Here, we investigated how different components...
Abstract. This study contributes to the inaugural exploration of non-equilibrated Ocean Alkalinity Enhancement (OAE). The manipulation Total (TA), involving silicate and calcium-based ∆TA gradients ranging from 0 600 µmol · L-1, was conducted without prior CO2 sequestration, under natural conditions at a mesocosm scale (~60 m3). resulting impact included an increase in pH decrease pCO2, sustained across experiment, as full equilibration via sea-gas exchange did not occur. Implemented neritic...
Abstract. This study contributes to the inaugural exploration of non-equilibrated ocean alkalinity enhancement (OAE). Total (TA) was manipulated, with silicate- and calcium-based ΔTA gradients ranging from 0 600 µmol L−1, without prior CO2 sequestration, under natural conditions at a mesocosm scale (∼ 60 m3). manipulation led sustained increase in pH decrease pCO2 throughout experiment, as full equilibration through sea–air gas exchange did not occur. Implemented neritic system post-bloom...