Publication Date:
2023-07-10
Description:
During the late 2007 austral summer, 20 sediment samples were collected in Admiralty Bay (King George Island, South Shetlands, West Antarctica) from 8 down to 254 m water-depth (mwd). The samples yielded abundant assemblage of monothalamous benthic foraminifera, belonging to at least 40 morphospecies. They constituted the first such collection from Antarctic Peninsula fjords and provided a new insight into this group's diversity and distribution. Among organic-walled taxa, Psammophaga sp., Allogromia cf. crystallifera, and three morphotypes of Gloiogullmia were especially abundant. Agglutinated forms were dominated by Hippocrepinella hirudinea, Psammosphaera spp., Lagenammina spp., and various mudballs. Although, the majority of the morphotypes were known from other high?latitude locations, somewere reported for the first time. Our quantitative data (〉125 µm) showed the greatest differences between monothalamous foraminifera assemblages at shallowest water depths above 50 mwd. The deepest assemblages from between 179 and 254 mwd, were most similar, suggesting uniform near-bottom conditions at ~200 mwd throughout the Admiralty Bay.
Keywords:
Admiralty_Bay; Allogromia cf. crystallifera; Area; Armorella cf. sphaerica; Armorella sp.; Astrammina rara; Astrammina triangularis; Astrorhiza sp.; Bathysiphon cf. argenteus; Bathysiphon cf. flexilis; Calculated; Calculated after Shannon (1948); Counting 〉125 µm fraction; Crithionina cf. granum; Crithionina sp.; Depth, bathymetric; DEPTH, sediment/rock; Distance; Dominance; Foraminifera, benthic; Foraminifera, benthic dead; Foraminifera, benthic indeterminata; Foraminifera, benthic monothalamous; Fraction; Gloiogullmia sp.; Gromiids; Hippocrepina cf. crassa; Hippocrepinella alba; Hippocrepinella hirudinea; King George Island, Antarctic Peninsula; Lagenammina spp.; LATITUDE; LONGITUDE; Micrometula sp.; MULT; Multiple investigations; Nemogullmia spp.; Number of species; Pelosina aff. sphaeriloculum; Pelosina didera; Phainogullmia cf. aurata; Psammophaga sp.; Psammosphaera spp.; Sample code/label; Sample method; Shannon Diversity Index; Tinogullmia sp.; Vanhoeffenella gaussi
Type:
Dataset
Format:
text/tab-separated-values, 1015 data points
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