Browsing by Subject "Lagoon"

Now showing 1 - 3 of 3
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    El registro Pleistoceno y Holoceno de la cuenca de Mazarrón (sureste de España)
    (Universidad de Murcia, 2026-06-03) Torres, Trinidad; Ortiz, José E.; Sánchez-Palencia, Yolanda; Ros Sala, Milagros; Navarro Hervás, Francisca; López-Cilla, Ignacio; Galán, Luis A.; Ramallo Asensio, Sebastián Federico; Rodríguez-Estrella, Tomás; Blázquez, Ana; Sin departamento asociado; Cutillas Victoria, Benjamín; Ramallo Asensio, Sebastián Federico
    The evolution of the Mazarrón Basin during the Pleistocene and Holocene is reconstructed. Nine core samples drilled by the University of Murcia were studied with the objectives of: 1) defining the chronological framework; 2) reconstruction of the paleoenvironmental conditions; and 3) establishing its relationship with recent tectonics. A total of 158 samples were recovered for amino acid racemization dating, 4 for radiocarbon dating, 332 for sedimentological and paleontological analysis, and 110 for mineralogical analysis. These data allowed for the elucidation of the evolutionary phases of the Mazarrón Basin paleolandscape, a fault-controlled graben affected by several faults, primarily the Las Moreras and Rella faults. The ages of the sedimentary record and facies correlation indicate that the Las Moreras Fault controlled sedimentation during Marine Isotope Stage (MIS) 7, while the Rella Fault was highly active during the Middle Holocene. During MIS 7, a brackish lagoon developed in the western area, overlying alluvial fan deposits. Subsequently, the area was uplifted, becoming exposed to erosion. Activity along the Rella Fault allowed sedimentation in the western part of the Mazarrón Basin during the Middle Holocene, while in the Late Holocene, sedimentation occurred in the eastern part. The Holocene transgression resulted in a temporarily floodable marshland inland, with varying salinity levels, from brackish to euhaline. Along the seafront, marine influence was evident but not dominant. Thus, during the Holocene, the Mazarrón Basin ranged from brackish to highly euhaline, with variable biological diversity linked to a close and probably discontinuous connection with the sea, restricted circulation, and long renewal times, reflected in the significant presence of halite. The record ended with recent alluvial/anthropogenic sediments.
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    Investigaciones arqueológicas marítimas en la laguna de Butrinto, Albania
    (Universidad de Murcia, 2026-06-03) Medas, Stefano; Giorgi, Enrico; Carbotti , Federica; Sigismondo, Giacomo; Prehistoria, Arqueología, Historia Antigua, Historia Medieval y Ciencias y Técnicas Historiográficas; Cutillas Victoria, Benjamín; Ramallo Asensio, Sebastián Federico
    The research program of the University of Bologna aims to contextualize the historical evolution of Butrint within its maritime environment, primarily through an overall study, both on land and underwater, of the coastal and lagoon landscape, thus analyzing the port system over time. The program also includes ethnographic studies of the fishing boats used in the lagoon.
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    Molecular fingerprint of gilthead seabream physiology in response to pollutant mixtures in the wild
    (Elsevier, ) Beauvieux, Anaïs; Fromentin, Jean-Marc; Couffin, Nathan; Brown, Adrien; Metral, Luisa; Bourjea, Jérôme; Bertile, Fabrice; Schull, Quentin; Romero García, Diego; Ciencias Sociosanitarias
    The increase in trace element concentrations in the aquatic environment due to anthropogenic activities, urges the need for their monitoring and potential toxicity, persistence, bioaccumulation, and biomagnification at different trophic levels. Gilthead seabream is a species of commercial importance in the Mediterranean Sea, both for the aquaculture and fisheries sectors, however very little is known about their trace element contamination accumulation and the resulting effect on their health status. In the present study, 135 juveniles were collected from seven coastal lagoons known to be essential nursery areas for this species. We measured seventeen different inorganic contaminants at the individual level in fish muscle (namely Al, As, Be, Bi, Cd, Cr, Cu, Hg, Li, Ni, Pb, Rb, Sb, Sr, Ti, Tl and Zn). Our results revealed the accumulation of multiple trace elements in individuals and distinct contamination signatures between lagoons which might lead to contrasted quality as nurseries for juveniles of numerous ecologically and economically relevant fish species in addition to seabreams. We further evaluated the potential adverse effect of these complex contamination mixtures on the liver (the main organ implicated in the metabolism of xenobiotics) and red muscle (a highly metabolic organ) using a proteomic approach. Alterations in cellular organization pathways and protein transport were detected in both tissues (albeit they were not similarly regulated). Chromosome organization and telomere maintenance in the liver appeared to be affected by contaminant mixture which could increase mortality, age-related disease risk and shorter lifetime expectancy for these juveniles. Red muscle proteome also demonstrated an upregulation of pathways involved in metabolism in response to contamination which raises the issue of potential energy allocation trade-offs between the organisms’ main functions such as reproduction and growth. This study provides new insights into the cellular and mo-lecular responses of seabreams to environmental pollution and proposed biomarkers of health effects of trace elements that could serve as a starting point for larger-scale biomonitoring programs.