A5018707330- Marine and coastal ecosystems
- Algal biology and biofuel production
- Diatoms and Algae Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Microbial Community Ecology and Physiology
- Protist diversity and phylogeny
- Marine Biology and Ecology Research
- Marine Toxins and Detection Methods
- Marine Invertebrate Physiology and Ecology
- Oceanographic and Atmospheric Processes
- Environmental Toxicology and Ecotoxicology
- Marine and coastal plant biology
- Water Quality Monitoring and Analysis
- Ocean Acidification Effects and Responses
- Odor and Emission Control Technologies
- Marine Sponges and Natural Products
- Plant Water Relations and Carbon Dynamics
- Marine Ecology and Invasive Species
- Coastal wetland ecosystem dynamics
- Marine Biology and Environmental Chemistry
- Biocrusts and Microbial Ecology
- Microplastics and Plastic Pollution
- Coral and Marine Ecosystems Studies
- Water Quality and Pollution Assessment
- Plant responses to water stress
Universidad de Cádiz
2013-2024
Instituto de Investigacións Mariñas
2022
Microbial associations and interactions drive regulate nutrient fluxes in the ocean. However, physical contact between cells of marine cyanobacteria has not been studied thus far. Here, we show a mechanism direct interaction
Polyunsaturated aldehydes (PUAs) are organic compounds mainly produced by diatoms, after cell wounding. These increasingly reported as teratogenic for species of grazers and deleterious phytoplanktonic species, but there is still scarce information regarding concentration ranges the composition PUAs in open ocean. In this study, we analyzed spatial distribution type large-sized (>10 μm) phytoplankton Atlantic Ocean surface. Analyses were conducted on released mechanical disruption cells,...
Diatoms, a major component of the large-sized phytoplankton, are able to produce and release polyunsaturated aldehydes after cell disruption (potential PUAs or pPUA). These organisms dominant in large phytoplankton fraction (>10 µm) Strait Gibraltar, only connection between Mediterranean Sea Atlantic Ocean. In this area, hydrodynamics exerts strong control on composition physiological state phytoplankton. This environment offers great opportunity analyze compare little known distribution...
Environmental context Diatoms, unicellular algae that live suspended in the water column, can undergo periods of rapid growth, called blooms. When these algal blooms die, organic compounds including polyunsaturated aldehydes are released to surrounding with currently unknown ecological effects. Here we demonstrate temperature differentially affects persistence three major produced by diatoms, and quantify removal rates from seawater compounds. Abstract Polyunsaturated (PUAs) volatile...
The polyunsaturated aldehydes (PUAs) are bioactive metabolites commonly released by phytoplankton species. Based primarily on laboratory experiments, PUAs have been implicated in deleterious effects herbivores and competing species or the regulation of rates bacterial organic matter remineralization; however, role at an ecosystem level is still under discussion. Using data PUA production natural assemblages over a wide range conditions, we analyzed macroecological patterns aiming for...
The effects of different incident irradiances on growth, photosynthesis, pigment content and nutrient uptake were studied in dense cultures the cryptophyte Rhodomonas salina (Wislouch) Hill y Wetherbee. Cells grown for ten days at irradiances: 11, 33, 75, 260 320 µmol photon m-2s-1. average (phycoerythrin chlorophyll a) was lower when cells high (260 m-2s-1) compared with under low (11, 33 75 m-2s-1).The maximum photosynthetic rate (Pmax) maximal m-2s-1 , decreasing considerably highest...
Abstract The physiology and biochemistry of Phaeodactylum tricornutum have been extensively studied, some aspects its biology are well known. Phenotypic plasticity is probably one most remarkable features. Two basic morphotypes, fusiform triradiate, can be found in natural liquid environments. Although the transformation from morphotype to other has previously reported, ecological causes consequences such remain unknown. Here, we report changes relative abundance two morphotypes associated...
The photosymbiosis with host-specific dinoflagellates is a widespread relationship in marine organisms. Despite the evidenced biodiversity of this kind mutualism, most research focuses on study scleractinian corals, and there lack knowledge about other symbiotic cnidarians such as jellyfishes. Mediterranean jellyfish Cotylorhiza tuberculata (Rhizostomae, Scyphozoa) harbors an endosymbiotic dinoflagellate family Symbiodiniaceae. In study, we examine algae distribution within host body well...
Polyunsaturated aldehydes (PUAs) are bioactive molecules suggested as chemical defenses and infochemicals. In marine coastal habitats, diatoms reach high PUA production levels during bloom episodes. Two fractions of can usually be analyzed: pPUA obtained via artificial breakage collected phytoplankton cells dissolved already released to the environment (dPUA). nature, resource supply arises a main environmental controlling factor production. this work, we monitored vertical distribution...
The effects of pH and total dissolved inorganic carbon (DIC) availability on the growth biochemical composition Phaeodactylum tricornutum Bohlin acclimated to restricted saturated light conditions have been investigated. Diluted, unbuffered nutrient enriched batch cultures were grown at several pHs (different [CO 2( aq ) ] for same DIC) various DIC an equal pH) under saturating (150 μmol m −2 s −1 subsaturating (30 levels. rate was unaffected by treatments light. In contrast, conditions,...
Phaeodactylum tricornutum Bohlin has long been considered as a representative model diatom, but critical uncertainties regarding its life cycle remain. It is characterized by marked pleiomorphism with three basic morphotypes: triradiate, fusiform and oval. In liquid media, triradiate cells gradually convert into the morphotype, passing through well-known intermediate forms, whereas reverse conversion never observed, merely assumed. The morphotype was even claimed teratological, no apparent...