Silicoflagellate abundance, vertical distribution and morphology were studied during spring (March 2014) at three sampling stations located in the Northeast Aegean Sea adjacent to the Dardanelles Strait and characterized by a variable influx of cold, low-salinity Black Sea water. The silicoflagellate assemblage was dominated by Dictyocha stapedia and Stephanocha speculum with minor contribution of D. aculeata and Octactis pulchra. While specimens of D. stapedia were represented by the typical morphologies described in other areas of the Mediterranean Sea, populations of S. speculum displayed peculiar characters: they were large, predominantly 7-sided, with a small apical ring as well as apical ring spines, concave basal ring sides and non-rotated apical structure. Some of these features have been described for S. speculum at high latitudes, but the combined characters make these specimens slightly different from the high latitude populations. Similar morphologies have been observed in the western Black Sea, thus we can infer that the peculiar specimens detected in the Northeast Aegean are associated with the influx of Black Sea water masses.

Malinverno, E., Karatsolis, B., Dimiza, M., Lagaria, A., Psarra, S., Triantaphyllou, M. (2016). Extant silicoflagellates from the Northeast Aegean (eastern Mediterranean Sea): Morphologies and double skeletons. REVUE DE MICROPALÉONTOLOGIE, 59(3), 253-265 [10.1016/j.revmic.2016.06.001].

Extant silicoflagellates from the Northeast Aegean (eastern Mediterranean Sea): Morphologies and double skeletons

Malinverno, E
;
2016

Abstract

Silicoflagellate abundance, vertical distribution and morphology were studied during spring (March 2014) at three sampling stations located in the Northeast Aegean Sea adjacent to the Dardanelles Strait and characterized by a variable influx of cold, low-salinity Black Sea water. The silicoflagellate assemblage was dominated by Dictyocha stapedia and Stephanocha speculum with minor contribution of D. aculeata and Octactis pulchra. While specimens of D. stapedia were represented by the typical morphologies described in other areas of the Mediterranean Sea, populations of S. speculum displayed peculiar characters: they were large, predominantly 7-sided, with a small apical ring as well as apical ring spines, concave basal ring sides and non-rotated apical structure. Some of these features have been described for S. speculum at high latitudes, but the combined characters make these specimens slightly different from the high latitude populations. Similar morphologies have been observed in the western Black Sea, thus we can infer that the peculiar specimens detected in the Northeast Aegean are associated with the influx of Black Sea water masses.
Articolo in rivista - Articolo scientifico
L’abondance, la distribution vertical et la morphologie de silicoflagellés ont été étudiés au cours du printemps (mars 2014) à trois stations d’échantillonnage situées dans la Mer Egée du Nord-Est à proximité du détroit des Dardanelles et caractérisés par un afflux variable d’eau froide à faible salinité de la Mer Noire. L’assemblage de silicoflagellates était dominé par Dictyocha stapedia et Stephanocha speculum avec une contribution mineure de D. aculeata et Octactis pulchra. Bien que des spécimens de D. stapedia étaient représentés par les morphologies typiques décrites dans d’autres zones de la Mer Méditerranée, les populations de S. speculum montré des caractéristiques particuliers: ils étaient grands, très souvent avec 7 côtés, avec un petit anneau apical et avec des épines sur l’anneau apical, les côtés concaves de l’anneau de base et la structure apicale non-tournée. Certaines de ces caractéristiques ont été décrites pour S. speculum dans les hautes latitudes, mais les caractéristiques combinées rendent ces spécimens légèrement différents des populations des hautes latitudes. Des morphologies similaires ont été observées dans la Mer Noire de l’Ouest, de sorte que nous pouvons en déduire que les spécimens particuliers détectés dans la Mer Egée du Nord-Est sont associés à l’afflux de masses d’eau de la Mer Noire
Black Sea water influx; Dictyocha stapedia; Northeast Aegean Sea; Silicoflagellates; Stephanocha speculum; Paleontology
Silicoflagellés; Mer Egée du Nord-Est; Afflux d’eau de la mer Noire; Stephanocha speculum; Dictyocha stapedia
English
French
253
265
13
Malinverno, E., Karatsolis, B., Dimiza, M., Lagaria, A., Psarra, S., Triantaphyllou, M. (2016). Extant silicoflagellates from the Northeast Aegean (eastern Mediterranean Sea): Morphologies and double skeletons. REVUE DE MICROPALÉONTOLOGIE, 59(3), 253-265 [10.1016/j.revmic.2016.06.001].
Malinverno, E; Karatsolis, B; Dimiza, M; Lagaria, A; Psarra, S; Triantaphyllou, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/134679
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