Diatom assemblages and biogenic silica from IODP Site 383-U1539
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2025
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| _version_ | 1867169167934750720 |
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| author | Duffy, Meghan Riesselman, Christina R |
| author_facet | Duffy, Meghan Riesselman, Christina R |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | From the complete downcore record of IODP Site 383-U1539, sampling was conducted at 1 m resolution. Quantitative diatom slides were prepared following the settling method of Warnock and Scherer (2015, doi:10.1016/j.csr.2015.04.012) using 15-25 μg of dry bulk sediment treated with 2 ml of 10 % hydrogen peroxide and two drops of saturated sodium hexametaphosphate. Sample solution was added to 2 L Elix water in B-KER2 chambers with prepared coverslips secured on a table above the height of the drainage valve. After settling and draining, coverslips were adhered to glass slides using Norland Optical Adhesive #61 (refractive index = 1.56). Slides were observed with a Leitz Dialux 20 light microscope, using a 100X oil immersion objective and 10X eyepieces for 1000X total magnification. A minimum of 400 valves were counted for each slide. Absolute diatom abundance and relative abundances of species are reported here. Biogenic silica analysis was conducted at the University of Otago following a modified version of Mortlock and Froelich (1989, doi:10.1016/0198-0149(89)90092-7) for the same set of samples used for diatom analysis. For each analysis, approximately 7 mg of dry sediment was homogenized and dissolved in 0.1 M NaOH solution in an 85°C water bath. Sub-samples were collected after 3, 4, and 5 hours. Dissolved silicon content was measured using a Shimadzu UV-1800 spectrophotometer. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_980080 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Diatom assemblages and biogenic silica from IODP Site 383-U1539 Duffy, Meghan Riesselman, Christina R 383-U1539A; 383-U1539B; 383-U1539C; 383-U1539D; Actinocyclus actinochilus; Actinocyclus curvatulus; Actinocyclus ingens; Actinoptychus spp.; Advanced piston corer; Asteromphalus hookeri; Asteromphalus hyalinus; Asteromphalus parvulus; Azpeitia tabularis; biogenic silica; Biogenic silica; CDRILL; Chaetoceros sp. (hyalochaete); Cocconeis spp.; Core drilling; Corethron pennatum; Coscinodiscus spp.; Dactyliosolen antarcticus; Date/Time of event; DEPTH, sediment/rock; Diatom assemblage; Diatoms, centrales indeterminata; Diatoms, pennales indeterminata; Diatoms, total, per unit sediment mass; DSDP/ODP/IODP sample designation; Eucampia antarctica, intercalary valves; Eucampia antarctica, terminal valves; Eucampia antarctica var. recta, intercalary valves; Eucampia antarctica var. recta, terminal valves; Event label; Exp383; Fragilariopsis barronii; Fragilariopsis bohatyi; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis fossilis; Fragilariopsis kerguelensis; Fragilariopsis matuyamae; Fragilariopsis obliquecostata; Fragilariopsis praeinterfrigidaria; Fragilariopsis pseudonana; Fragilariopsis reinholdii; Fragilariopsis rhombica; Fragilariopsis ritscheri; Fragilariopsis robusta; Fragilariopsis separanda; Fragilariopsis spp.; Fragilariopsis sublinearis; Fragilariopsis weaveri; Half; Hemidiscus cuneiformis; Hemidiscus karstenii; IODP Depth Scale Terminology; Joides Resolution; Latitude of event; Longitude of event; Opal extraction according to Mortlock & Froelich, 1989; Rhizosolenia antennata forma semispina; Rhizosolenia polydactyla; Rhizosolenia polydactyla forma squamosa; Rhizosolenia simplex; Rhizosolenia spp.; Rouxia antarctica; Rouxia constricta; Rouxia leventerae; Sample code/label; Shionodiscus gracilis var. expectus; Shionodiscus gracilis var. gracilis; Shionodiscus oestrupii; Shionodiscus tetraoestrupii; Smear slide analysis; Southern Ocean; Stellarima stellaris; Thalassionema nitzschioides; Thalassionema nitzschioides var. parva; Thalassiosira antarctica T1; Thalassiosira antarctica T2; Thalassiosira elliptipora; Thalassiosira fasciculata; Thalassiosira kolbei; Thalassiosira lentiginosa; Thalassiosira lineata; Thalassiosira oliverana; Thalassiosira spp.; Thalassiosira torokina; Thalassiosira trifulta; Thalassiosira tumida; Thalassiosira vulnifica; Thalassiothrix antarctica; Trichotoxon reinboldii From the complete downcore record of IODP Site 383-U1539, sampling was conducted at 1 m resolution. Quantitative diatom slides were prepared following the settling method of Warnock and Scherer (2015, doi:10.1016/j.csr.2015.04.012) using 15-25 μg of dry bulk sediment treated with 2 ml of 10 % hydrogen peroxide and two drops of saturated sodium hexametaphosphate. Sample solution was added to 2 L Elix water in B-KER2 chambers with prepared coverslips secured on a table above the height of the drainage valve. After settling and draining, coverslips were adhered to glass slides using Norland Optical Adhesive #61 (refractive index = 1.56). Slides were observed with a Leitz Dialux 20 light microscope, using a 100X oil immersion objective and 10X eyepieces for 1000X total magnification. A minimum of 400 valves were counted for each slide. Absolute diatom abundance and relative abundances of species are reported here. Biogenic silica analysis was conducted at the University of Otago following a modified version of Mortlock and Froelich (1989, doi:10.1016/0198-0149(89)90092-7) for the same set of samples used for diatom analysis. For each analysis, approximately 7 mg of dry sediment was homogenized and dissolved in 0.1 M NaOH solution in an 85°C water bath. Sub-samples were collected after 3, 4, and 5 hours. Dissolved silicon content was measured using a Shimadzu UV-1800 spectrophotometer. |
| title | Diatom assemblages and biogenic silica from IODP Site 383-U1539 |
| topic | 383-U1539A; 383-U1539B; 383-U1539C; 383-U1539D; Actinocyclus actinochilus; Actinocyclus curvatulus; Actinocyclus ingens; Actinoptychus spp.; Advanced piston corer; Asteromphalus hookeri; Asteromphalus hyalinus; Asteromphalus parvulus; Azpeitia tabularis; biogenic silica; Biogenic silica; CDRILL; Chaetoceros sp. (hyalochaete); Cocconeis spp.; Core drilling; Corethron pennatum; Coscinodiscus spp.; Dactyliosolen antarcticus; Date/Time of event; DEPTH, sediment/rock; Diatom assemblage; Diatoms, centrales indeterminata; Diatoms, pennales indeterminata; Diatoms, total, per unit sediment mass; DSDP/ODP/IODP sample designation; Eucampia antarctica, intercalary valves; Eucampia antarctica, terminal valves; Eucampia antarctica var. recta, intercalary valves; Eucampia antarctica var. recta, terminal valves; Event label; Exp383; Fragilariopsis barronii; Fragilariopsis bohatyi; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis fossilis; Fragilariopsis kerguelensis; Fragilariopsis matuyamae; Fragilariopsis obliquecostata; Fragilariopsis praeinterfrigidaria; Fragilariopsis pseudonana; Fragilariopsis reinholdii; Fragilariopsis rhombica; Fragilariopsis ritscheri; Fragilariopsis robusta; Fragilariopsis separanda; Fragilariopsis spp.; Fragilariopsis sublinearis; Fragilariopsis weaveri; Half; Hemidiscus cuneiformis; Hemidiscus karstenii; IODP Depth Scale Terminology; Joides Resolution; Latitude of event; Longitude of event; Opal extraction according to Mortlock & Froelich, 1989; Rhizosolenia antennata forma semispina; Rhizosolenia polydactyla; Rhizosolenia polydactyla forma squamosa; Rhizosolenia simplex; Rhizosolenia spp.; Rouxia antarctica; Rouxia constricta; Rouxia leventerae; Sample code/label; Shionodiscus gracilis var. expectus; Shionodiscus gracilis var. gracilis; Shionodiscus oestrupii; Shionodiscus tetraoestrupii; Smear slide analysis; Southern Ocean; Stellarima stellaris; Thalassionema nitzschioides; Thalassionema nitzschioides var. parva; Thalassiosira antarctica T1; Thalassiosira antarctica T2; Thalassiosira elliptipora; Thalassiosira fasciculata; Thalassiosira kolbei; Thalassiosira lentiginosa; Thalassiosira lineata; Thalassiosira oliverana; Thalassiosira spp.; Thalassiosira torokina; Thalassiosira trifulta; Thalassiosira tumida; Thalassiosira vulnifica; Thalassiothrix antarctica; Trichotoxon reinboldii |
| url | https://doi.org/10.1594/PANGAEA.980080 |