Living and dead benthic foraminiferal distribution in two areas of the Ross Sea (Antarctica)

We investigated the living (stained) and dead benthic foraminiferal assemblages collected in surface sediment samples (0–1 cm) from two different areas (JOIDES Basin and Mawson Bank) of the Ross Sea (Antarctica). Samples were collected during the BEDROSE oceanographic cruise from January to February...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Scienze fisiche e naturali Jg. 31; H. 4; S. 1037 - 1053
Hauptverfasser: Capotondi, Lucilla, Bonomo, Sergio, Budillon, Giorgio, Giordano, Patrizia, Langone, Leonardo
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Cham Springer International Publishing 01.12.2020
Springer Nature B.V
Schlagworte:
Biomedicine
Cluster analysis
Earth and Environmental Science
Earth Sciences
Environment
Environmental conditions
Fauna
History of Science
Life Sciences
Relative abundance
Sediment samplers
Sedimentation
Taphonomy
Taxa
Ross Sea
Antarctica
Ross Sea
Benthic foraminifera
Antarctica
Living and dead assemblages
Environmental conditions
ISSN:2037-4631, 1720-0776
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:We investigated the living (stained) and dead benthic foraminiferal assemblages collected in surface sediment samples (0–1 cm) from two different areas (JOIDES Basin and Mawson Bank) of the Ross Sea (Antarctica). Samples were collected during the BEDROSE oceanographic cruise from January to February 2017. Four living and dead benthic foraminiferal fauna assemblages have been distinguished based on cluster analysis. The differences observed in the living and dead foraminiferal content from the two investigated areas are the result of taphonomic processes induced by the different oceanographic settings and environmental conditions. In the JOIDES Basin, agglutinated taxa Rhabdamminella cylindrica, Lagenammina difflugiformis, Adercotryma glomeratum, Recurvoides contortus, Reophax subfusiformis with high percentages of Trochammina group and Reophax spiculifer associated with the calcareous species Nonionella bradii and Astrononion echolsi characterize the living assemblages. The comparison between living and dead benthic foraminifera reveals considerable similarities in terms of the presence/absence of agglutinated species and differences in relative abundance of calcareous taxa. However, the major influencing factor in foraminiferal preservation appears to be the carbonate dissolution. Results from Mawson Bank show an almost exclusive presence of calcareous taxa with high percentages of Globocassidulina group in both living and dead assemblages. The dead fauna assemblage differs from the corresponding living assemblage by being more diverse documenting high-energy current influence on marine sedimentation. Graphic abstract
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:2037-4631
1720-0776
DOI:10.1007/s12210-020-00949-z