Resting stage in the biogenic fraction of surface sediments from the deep Mediterranean Sea

Authors

  • Luigi della Tommasa Di.S.Te.B.A., Università di Lecce. Complesso ECOTEKNE
  • Roberto Danovaro Sezione Biologia Marina, Facoltà di Scienze, Università di Ancona
  • Genuario Belmonte Di.S.Te.B.A., Università di Lecce. Complesso ECOTEKNE
  • Ferdinando Boero Di.S.Te.B.A., Università di Lecce. Complesso ECOTEKNE

DOI:

https://doi.org/10.3989/scimar.2004.68s1103

Keywords:

resting stages, deep sea, Mediterranean, biogenic sediments, cyst morphology

Abstract


The presence of resting stages in neritic areas is well known, while their occurrence in the deep sea realm has seldom been considered. Recent investigations showed strict interactions between neritic and deep sea domains, due to up- and down-welling phenomena driven by submarine canyons. To estimate the presence of resting stages in deep bottom sediments, seven sediment cores, collected along a trans-Mediterranean transect by means a multi-corer during the TRANSMED survey (1999), were studied. Most biogenic sediment was composed of Foraminifera tests (tens of thousand tests cm-3), Calciodinellum albatrosianum and Leonella granifera (Dinophyta) cysts (up to thousands cysts cm-3). Eleven dinocyst morphotypes were recorded mainly as empty shells (seven calcareous-walled: C. albatrosianum, Calciperidinium asymmetricum, Leonella granifera, Scrippsiella trochoidea, S. precaria type 1, S. precaria type 2, S. regalis; four organic-walled: Impagidinium aculeatum, unid. dinocyst 1, unid. dinocyst 2 and unid. dinocyst 3), while no metazoan resting eggs were observed. The presence of viable resting stages in deep bottom surface sediments was much lower than in neritic areas, suggesting that oceanic species do not produce cysts for a "benthic resting" strategy. Further taxonomic and biogeographic studies are needed to better understand the ecological dynamics of oceanic plankton in the Mediterranean Sea.

Downloads

Download data is not yet available.

Downloads

Published

2004-04-30

How to Cite

1.
della Tommasa L, Danovaro R, Belmonte G, Boero F. Resting stage in the biogenic fraction of surface sediments from the deep Mediterranean Sea. scimar [Internet]. 2004Apr.30 [cited 2022Nov.29];68(S1):103-11. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/388

Issue

Section

Articles