Relative abundance of diatoms in a sediment core from Lake Pacú, lower Negro River, Central Amazonia, during the mid- to late Holocene
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2025
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| _version_ | 1867169168290217984 |
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| author | Rodrigues, Érika do Socorro Ferreira Yao, Qiang |
| author_facet | Rodrigues, Érika do Socorro Ferreira Yao, Qiang |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | This dataset contains the relative abundance of diatom taxa identified in 68 sediment samples collected at 0.10 m intervals from core NGR07, from Lake Pacú, in the lower Negro River region of the Central Amazonia. The diatom assemblages were analyzed to reconstruct changes in aquatic conditions associated with flood pulse oscillations during the mid- to late Holocene. Approximately 500 valves were counted per sample using light microscopy, and taxa were identified based on microstructural features, supported by regional diatom atlases. The dataset includes both periphytic and planktonic forms, reflecting lake-level variations since the mid-Holocene. Diatom diagrams and zonations were generated using Tilia and CONISS software. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_981676 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Relative abundance of diatoms in a sediment core from Lake Pacú, lower Negro River, Central Amazonia, during the mid- to late Holocene Rodrigues, Érika do Socorro Ferreira Yao, Qiang Actinella curvatula; Actinella pararobusta; Actinella sp.; Amazon Basin; Aulacoseira ambigua; Aulacoseira distans; Aulacoseira gessneri; Aulacoseira granulata; Aulacoseira sp.; DEPTH, sediment/rock; Diatom assemblage; Diatoms; Encyonopsis braunii; Eunotia emedii; Eunotia inspectabilis; Eunotia meridiana; Eunotia parasiolli; Eunotia pseudoserra; Eunotia souzae; Eunotia sp.; Eunotia subrobusta; Fragilaria javanica; Fragilaria nitzschioides; Fragilaria sp.; Frustulia magna; Gomphonema archaevibrio; limnology; LIVC; Livingstone corer; Navicula reichardtiana; Navicula sp.; Negro River; Neidium neotropicum; NGR07; Periphyton; Phytoplankton, marine; Pinnularia angustivalva; Pinnularia delicata; Pinnularia monicae; Pinnularia perinstabilis; Pinnularia pisciculus; Pinnularia procera; Pinnularia sp.; Pinnularia viridiformes; Placoneis convenius; Placoneis pseudodemerarae; Placoneis tersa; pollen and spores; reconstructing vegetation change; Relative abundance (counted and calculated); Sum; Surirella sp. This dataset contains the relative abundance of diatom taxa identified in 68 sediment samples collected at 0.10 m intervals from core NGR07, from Lake Pacú, in the lower Negro River region of the Central Amazonia. The diatom assemblages were analyzed to reconstruct changes in aquatic conditions associated with flood pulse oscillations during the mid- to late Holocene. Approximately 500 valves were counted per sample using light microscopy, and taxa were identified based on microstructural features, supported by regional diatom atlases. The dataset includes both periphytic and planktonic forms, reflecting lake-level variations since the mid-Holocene. Diatom diagrams and zonations were generated using Tilia and CONISS software. |
| title | Relative abundance of diatoms in a sediment core from Lake Pacú, lower Negro River, Central Amazonia, during the mid- to late Holocene |
| topic | Actinella curvatula; Actinella pararobusta; Actinella sp.; Amazon Basin; Aulacoseira ambigua; Aulacoseira distans; Aulacoseira gessneri; Aulacoseira granulata; Aulacoseira sp.; DEPTH, sediment/rock; Diatom assemblage; Diatoms; Encyonopsis braunii; Eunotia emedii; Eunotia inspectabilis; Eunotia meridiana; Eunotia parasiolli; Eunotia pseudoserra; Eunotia souzae; Eunotia sp.; Eunotia subrobusta; Fragilaria javanica; Fragilaria nitzschioides; Fragilaria sp.; Frustulia magna; Gomphonema archaevibrio; limnology; LIVC; Livingstone corer; Navicula reichardtiana; Navicula sp.; Negro River; Neidium neotropicum; NGR07; Periphyton; Phytoplankton, marine; Pinnularia angustivalva; Pinnularia delicata; Pinnularia monicae; Pinnularia perinstabilis; Pinnularia pisciculus; Pinnularia procera; Pinnularia sp.; Pinnularia viridiformes; Placoneis convenius; Placoneis pseudodemerarae; Placoneis tersa; pollen and spores; reconstructing vegetation change; Relative abundance (counted and calculated); Sum; Surirella sp. |
| url | https://doi.org/10.1594/PANGAEA.981676 |