Purification of Disc-Shaped Diatoms from the Southern Ocean Sediment by a Cell Sorter to Obtain an Accurate Oxygen Isotope Record

• Main Authors: Akira Ijiri (5118521), Takeshi Izumi (4734987), Yuki Morono (130139), Yuji Kato (2280721), Takeshi Terada (2660407), Minoru Ikehara (3767374)
• Format: Other Non-Article Part of Journal/Newspaper
• Language: unknown
• Published: 2021
• Subjects: Biophysics; Cell Biology; Ecology; Developmental Biology; Marine Biology; Inorganic Chemistry; Plant Biology; Environmental Sciences not elsewhere classified; Biological Sciences not elsewhere classified; quantitative paleoenvironmental proxy; oxygen isotopic composition; occurs ubiquitously throughout; indian ocean sector; specific separation due; bulk diatoms contains; sediment core retrieved; sediment core obtained; shaped diatoms using; shaped diatoms showed; lr04 benthic δ; 18 </ sup; southern ocean sediment; method using samples; southern ocean; shaped diatoms; sediment type; core sample; liquid separation; diatoms living; diatoms associated; water depths; various seasons; thalassiosira lentiginosa; small size; new method; mineral contamination; diatom assemblage; conrad rise; cell sorter; accurate δ; 40 ka; Southern Ocean; Indian; Fryxell; Conrad Rise; EPICA; ice core
• Online Access: https://doi.org/10.1021/acsearthspacechem.1c00201.s001

The oxygen isotopic composition (δ 18 O) of diatom frustules is potentially a quantitative paleoenvironmental proxy. However, δ 18 O analysis has some uncertainties because of difficulties in removing clay-mineral contamination and taxon-specific separation due to the small size of diatom frustules....