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  • Biodiversity  (3)
  • Instituto Antartico Ecuatoriano, Guayaquil, Ecuador  (1)
  • Nature Publishing Group  (1)
  • Universidad Nacional. Facultad de Ciencias Exactas y Naturales. Escuela de Biología  (1)
  • 2010-2014  (3)
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  • 2010-2014  (3)
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  • 1
    Publication Date: 2022-05-25
    Description: © The Author(s), 2013. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 3 (2013): 2802, doi:10.1038/srep02802.
    Description: It is usually assumed that metabolic constraints restrict deep-sea corals to cold-water habitats, with ‘deep-sea’ and ‘cold-water’ corals often used as synonymous. Here we report on the first measurements of biological characters of deep-sea corals from the central Red Sea, where they occur at temperatures exceeding 20°C in highly oligotrophic and oxygen-limited waters. Low respiration rates, low calcification rates, and minimized tissue cover indicate that a reduced metabolism is one of the key adaptations to prevailing environmental conditions. We investigated four sites and encountered six species of which at least two appear to be undescribed. One species is previously reported from the Red Sea but occurs in deep cold waters outside the Red Sea raising interesting questions about presumed environmental constraints for other deep-sea corals. Our findings suggest that the present understanding of deep-sea coral persistence and resilience needs to be revisited.
    Keywords: Ecosystem ecology ; Biodiversity ; Genetics ; Metabolism
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Format: application/msword
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  • 2
    Publication Date: 2021-05-19
    Description: El buceo contemplativo en los arrecifes coralinos es una de las pocas actividades autorizadas en el área manejada por el Centro Internacional de Buceo María la Gorda del Parque Nacional Guanahacabibes. Se evaluó la composición y estructura de las asociaciones de peces en los arrecifes utilizados por el Centro Internacional de Buceo María la Gorda. Considerando la posibilidad de cambios estacionales en la densidad y composición de los peces, se realizaron muestreos en las épocas seca y lluviosa. Se realizaron censos visuales en ocho sitios de buceo (12 transectos de 50 x 2 m en cada uno), en dos biotopos característicos del arrecife. Se estimaron los índices de diversidad, equitatividad, riqueza de especies, densidad y biomasa de peces. Los valores de densidad promedio y los índices de diversidad por estaciones no mostraron diferencias significativas entre las épocas. Se registraron 134 especies en toda el área. La abundancia de peces fue superior en los sitios de mayor complejidad estructural, correspondientes a la zona de camellones de la pendiente arrecifal. Se observó un predominio de peces de pequeña talla y pobre presencia de peces de mediana y gran talla. Las familias con mayor densidad fueron Pomacentridae y Labridae, y las de mayor biomasa Lutjanidae y Labridae. La estructura trófica estuvo dominada por los plantófagos y omnívoros. Aunque se observaron carnívoros de tallas medianas, su densidad fue inferior al resto de los grupos, lo cual parece ser consecuencia de la pesca furtiva.
    Description: Recreational SCUBA diving on the coral reefs is one of the few activities allowed in the area managed by the Centro Internacional de Buceo María la Gorda at the Guanahacabibes National Park. The composition and structure of fish associations were evaluated on the reefs visited by users of the diving center. To assess possible seasonal changes in fish community densities and composition surveys were carried during the dry and rainy seasons. Visual censuses were carried out at eight diving sites comprising two characteristic reef biotopes. Indices for diversity, evenness, species richness, density, and fish biomass were estimated. Mean density values by sampling site did not show significant differences between seasons. A total of 134 species were recorded in the area. Fish abundances were greater in sites of higher structural complexity, matching areas of ridges on the reef slope. Prevalence of small-sized fish and a general poor presence of medium to high-sized fish were observed. Fish families with the higher densities were Pomacentridae and Labridae, and those with the higher biomass were Lutjanidae and Labridae. The trophic structure was dominated by phytophagous and omnivorous fish. Medium-sized carnivorous fish were observed, however, their densities were much lower than for the rest of the trophic groups, which could be a consequence of illegal fishing activities.
    Description: Published
    Description: biodiversidad, diversidad, arrecifes coralinos, asociaciones de peces
    Keywords: Coral reefs ; Biodiversity ; Fisheries organizations ; Coral reefs
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 3
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    Instituto Antartico Ecuatoriano, Guayaquil, Ecuador
    Publication Date: 2021-05-19
    Description: La Punta Fort Williams, en la Isla Greenwich, fue el lugar seleccionado por el Programa Antártico Ecuatoriano para la construcción de la Estación Científica "Pedro Vicente Maldonado", proyecto que representa la decisión del Estado Ecuatoriano por incorporar la región Antártica al quehacer científico nacional. La estación, de tipo modular, está localizada en una plataforma plana y reciente, de terreno suelto a una altitud de 20 metros aproximadamente, constituida de sedimentos consolidados glaciomarinos. El área está protegida de los vientos más fuertes y predominantes que tienen orientación Este. El principal acceso lo constituye la Ensenada Guayaquil, ubicada entre la Punta Orión y el Glacial Quito (INOCAR, 1990). La Punta Fort Williams y sus alrededores constituyen un sitio adecuado para la investigación en las áreas de Ciencias de la Tierra (Mapeo geológico, geología continental y costera, geología y geofísica marina, geodesia y glaciología); Ciencias de la Vida (Biología Marina y Terrestre), Ciencias del Mar (Oceanografía física, química, biología y geológica); Ciencias de la Atmósfera (Meteorología); permitiendo el desarrollo de proyectos orientados principalmente a la conservación del ecosistema natural biótico y abiótico de la región.
    Description: Point Fort Williams, Greenwich Islands, is the elected settlement by Programa Antártico Ecuatoriano for installation of the Antarctic Station Pedro Vicente Maldonado, project that represents the ecuadorian government's decision to incorporate the Antarctic region to the national scientific research. The modular kind station is situated in a flat surface raised, subactual, 20 meters high, composed of glacio/marine unconsolidated sediments. The area sheltered from dominant and strongest east winds, has the main acces in the Guayaquil Cove between the Orion Point and Quito Glaciar (INOCAR, 1990). For Williams and neighbourhood constitute adequate local to researchers in Geosciences (Geological mapping, coastal and continental geology, Marine Geology and geophysics, geodesy, glaciology); Biosciences (Marine and terrestrial biology); Atmosphere Sciencies (Meteorology) and logistics; special utilization and manangement of the site and adjancences is recommended, contributing to the conservation of the abiotic and biotic natural ecosystem.
    Description: Published
    Keywords: Living resources ; Biodiversity ; Installation ; Scientific personnel ; Living resources ; Biodiversity ; Station lists
    Repository Name: AquaDocs
    Type: Journal Contribution
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