Relative abundance of diatom species in surface samples from the Southern Ocean, Sea ice species, supplement to: Armand, Leanne K; Crosta, Xavier; Romero, Oscar E; Pichon, Jean-Jacques (2005): The biogeography of major diatom taxa in Southern Ocean sediments: 1. Ice related species. Palaeogeography, Palaeoclimatology, Palaeoecology, 223(1-2), 93-126

• Main Authors: Armand, Leanne K, Crosta, Xavier, Romero, Oscar E, Pichon, Jean-Jacques
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2005
• Subjects: Event label; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; Actinocyclus actinochilus; Chaetoceros affinis, resting spores; Chaetoceros constrictus, resting spores; Chaetoceros coronatus, resting spores; Chaetoceros debilis, resting spores; Chaetoceros diadema, resting spores; Chaetoceros lorenzianus, resting spores; Chaetoceros radicans, resting spores; Fragilariopsis separanda; Porosira pseudodenticulata; Stellarima microtrias; Thalassiosira antarctica; Thalassiosira tumida; Giant box corer; MultiCorer; Gravity corer Kiel type; Counting, diatoms; M46/4; Meteor 1986; Center for Marine Environmental Sciences MARUM; Romero; Southern Ocean; Antarc*; Antarctica; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.425284; https://doi.pangaea.de/10.1594/PANGAEA.425284

Diatoms from 228 Southern Ocean core-top sediment samples were examined to determine the geographic distributions of 32 major diatom species/taxa preserved in the sediments of three zonally-distinct regions; Sea Ice, Open Ocean and the Tropical/Subtropical. In the first of three papers, 14 species/taxa occurring in the region where sea ice covers the ocean surface on an annual basis are geographically documented. Comparisons are drawn between the diatom abundances on the sea floor, sea ice parameters (annual duration and concentration in February and September) and February sea-surface temperature. Such parameters are commonly used in reconstructing past oceanographic conditions in the Sea Ice and Open Ocean zones. Analysis of the geographic patterns and sea-surface parameter correlations reveals species-specific distributions regulated primarily by sea ice coverage and sea-surface temperature, which support the use of diatom remains for the estimation of these past sea-surface environmental parameters. Comparison with reliable accounts of the 14 species from the sediments or plankton also provides the first glimpses into species-specific ecology and habitat linkages. : Depth=Surface sediment 0-1 cm