Caracterización ambiental de montes submarinos del Mar de Alborán a partir del estudio de los sedimentos y las asociaciones de foraminíferos bentónicos
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Abstract
Los estudios sobre los montes submarinos de los Bancos Djibouti (Mar
de Alborán) son muy escasos. El interés especial de estos montes es su ubicación
entre las masas de agua atlántica y mediterránea, su peculiar hidrodinámica
y características físico-químicas y sedimentológicas. Los análisis
granulométricos y geoquímicos así como las asociaciones de foraminíferos
bentónicos en los sedimentos de los montes submarinos Herradura y Avempace
(recogidos durante el proyecto DEEPER-IEO), han permitido caracterizar
sus cumbres. En general, presentan condiciones ambientales similares
de bajo hidrodinamismo y sedimentos de tipo fango a arena arcillosa, con
gran proporción de partículas biogénicas y, probablemente, y finos procedentes
de áreas costeras y polvo sahariano. Las asociaciones de foraminíferos
bentónicos son también muy similares, dominando las especies de las familias
Uvigerinidae, Cibicidae y Textulariidae. El enfoque interdisciplinar de
este estudio es aconsejable para el análisis eficaz de los hábitats con especies
amenazadas de alto valor ecológico y económico
Studies on seamounts from the Djibouti Banks (Alboran Sea) are very scarce. The special interest of these seamounts is their location between Atlantic and Mediterranean water masses and the peculiar hydrodynamic, physicochemical and sedimentological characteristics. The granulometric and geochemical analyses as well as the benthic foraminiferal assemblages of sediments from Herradura and Avempace seamounts (collected during the project DEEPER–IEO) have allowed characterizing the environment of these seamounts summits. In general, both seamounts show similar environmental conditions of low hydrodynamism and muddy to clayey sand sediments with large proportion of biogenic and, probably, fine-sized particles from coastal areas and Saharan dust. Benthic foraminiferal assemblages are also very similar in both seamounts and dominated by species of families Uvigerinidae, Cibicidae and Textulariidae. The interdisciplinary approach of this study is reliable for effective analysis of habitats with threatened species of high ecological and economical value
Studies on seamounts from the Djibouti Banks (Alboran Sea) are very scarce. The special interest of these seamounts is their location between Atlantic and Mediterranean water masses and the peculiar hydrodynamic, physicochemical and sedimentological characteristics. The granulometric and geochemical analyses as well as the benthic foraminiferal assemblages of sediments from Herradura and Avempace seamounts (collected during the project DEEPER–IEO) have allowed characterizing the environment of these seamounts summits. In general, both seamounts show similar environmental conditions of low hydrodynamism and muddy to clayey sand sediments with large proportion of biogenic and, probably, fine-sized particles from coastal areas and Saharan dust. Benthic foraminiferal assemblages are also very similar in both seamounts and dominated by species of families Uvigerinidae, Cibicidae and Textulariidae. The interdisciplinary approach of this study is reliable for effective analysis of habitats with threatened species of high ecological and economical value










