A5048220169- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Microbial Community Ecology and Physiology
- Ocean Acidification Effects and Responses
- Physiological and biochemical adaptations
- Oceanographic and Atmospheric Processes
- Aquaculture Nutrition and Growth
- Environmental Toxicology and Ecotoxicology
- Photoreceptor and optogenetics research
- Coastal and Marine Management
- Methane Hydrates and Related Phenomena
- Birth, Development, and Health
- Radiation Dose and Imaging
- Cardiovascular and Diving-Related Complications
- Marine Invertebrate Physiology and Ecology
- Wastewater Treatment and Nitrogen Removal
- Geological and Geophysical Studies
- Parathyroid Disorders and Treatments
- Erythrocyte Function and Pathophysiology
- Venomous Animal Envenomation and Studies
- Crustacean biology and ecology
- Educational methodologies and cognitive development
- Protist diversity and phylogeny
Millennium Institute of Oceanography
2021-2023
University of Concepción
2021-2023
Leibniz Institute for Baltic Sea Research
2019
Universidad de Las Palmas de Gran Canaria
2011-2016
Abstract Changes in the complexity of planktonic food webs may be expected future aquatic systems due to increases sea surface temperature and an enhanced stratification water column. Under these conditions, growth unpalatable, filamentous, N 2 ‐fixing cyanobacterial blooms, their effect on will become increasingly important. The web structure ecosystems at times filamentous blooms is currently unresolved, with discordant lines evidence suggesting that herbivores dominate mesozooplankton or...
Abstract Respiration is a key process in the cycling of particulate matter and, therefore, an important control mechanism carbon export to ocean's interior. Most fixed lost upper ocean, and only minor amount organic material sustains life deep‐sea. Conditions are particularly extreme hadal trenches, yet they host active biological communities. The source that supports them contribution these communities ocean cycle, however, remain uncertain. Here we report on size‐fractionated depth...
Abstract. Oceanic depth profiles of plankton respiration are described by a power function, RCO2 = (RCO2)0 (z/z0)b, similar to the vertical carbon flux profile. Furthermore, because both ocean processes closely related, conceptually and mathematically, each can be calculated from other. The exponent b, always negative, defines maximum curvature respiration–depth profile controls flux. When |b| is large, (FC) epipelagic low nutrient retention efficiency (NRE) high, allowing these waters...
The environmental regulation of planktonic food web structure is a key determinant for the efficiency energy transfer through trophic levels, with direct implications amount that available to top-consumers and deep-sea communities. Yet, complex interplay between different components plankton communities under contrasting conditions remains unresolved. Here, we present comprehensive field study based on compound-specific isotope analysis amino acids aims explore depth-resolved changes in...
We have studied the in vivo respiratory oxygen consumption (RO2) and potential respiration rates (Φ), measured by enzymatic activity of electron transport system (ETS), epipelagic marine zooplankton from several systems. Furthermore, we determined intracellular concentration ETS substrates, i.e. pyridine nucleotides (PNs), these organisms. Both RO2 Φ relationship between them (RO2/Φ) showed a major dependency on habitat temperature, with significantly higher values warm waters North...
The highly productive upwelling zone in the Southeast Pacific provides inputs of C and N to oceanic deep-water system via lateral transport, although quality this organic matter, organisms being transported, controlling mechanisms are unclear. Here, we assessed whether taxonomic trophic structure zooplankton over more offshore waters differ from that located zone, along with characterization oceanographic processes variables associated transport. For this, epipelagic, mesopelagic,...
Abstract Oceanic trenches are an important sink for organic matter (OM). However, little is known about how much of the OM reaching hadal region derives from sunlit surface ocean and other sources. We provide new insight into sources in Atacama Trench by examining elemental stable isotope composition carbon nitrogen bulk throughout entire water column down to bathyal sediments. Moreover, we estimated particulate (POC) concentration downward flux. Our results, based on two‐way variance...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 550:83-99 (2016) - DOI: https://doi.org/10.3354/meps11700 Building a model of ammonium excretion in two species marine zooplankton based on glutamate dehydrogenase kinetics I. Fernández-Urruzola1,*, N. Osma1, M. Gómez1, S. Montesdeoca-Esponda2, T. Packard1 1Marine Ecophysiology Group (EOMAR), Universidad de...
Abstract Hadal sediments are recognized as organic carbon depocenters with intensified microbial activity compared to adjacent abyssal sites due focusing of relatively labile materials. However, the sources and turnover hadopelagic its linkages activities have not been studied. We present first synergic research on particulate carbon, dark fixation, size‐fractionated community respiration proxy over Atacama Trench. The results demonstrate that all parameters attenuate rapidly from surface...
Abstract. Oceanic depth profiles of plankton respiration are described by a power function, RCO2 = (RCO2)0(z/z0)b similar to the vertical carbon flux profile. Furthermore, because both ocean processes closely related, conceptually and mathematically, each can be calculated from other. The exponent (b), always negative, defines maximum curvature depth-profile controls flux. When b is large, C (FC) epipelagic low nutrient retention efficiency (NRE) high allowing these waters maintain...