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| Natura: | Dataset Open Access |
| Lingua: | en |
| Pubblicazione: |
PANGAEA
2025
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| Accesso online: | https://doi.org/10.1594/PANGAEA.981683 |
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| _version_ | 1867168236737396736 |
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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 presents the relative abundance of pollen and spores from 68 sediment samples collected at 0.10 m intervals along core NGR07, retrieved from Lake Pacú in the lower Negro River region, Central Amazonia. The analyses were conducted to reconstruct past vegetation dynamics in response to mid- to late Holocene hydrological variability. Palynomorphs were identified using regional pollen reference collections and published identification keys. Approximately 300 grains were counted per sample (except in pollen-poor intervals), and Lycopodium spores were added as exotic markers to calculate concentration values. The dataset provides insights into shifts in floodplain forest composition, herbaceous vegetation patterns, and the evolution of modern igapó systems over time. Pollen diagrams and cluster analyses were produced using Tilia and CONISS software. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_981683 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Relative abundance of pollen and spores 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 Acalypha sp.; Alchornea sp.; Alibertia sp.; Amanoa sp.; Amazon Basin; Anacardiaceae; Annonaceae; Annona sp.; Apeiba sp.; Apocynaceae; Astrocaryum sp.; Astronium sp.; Byrsonima sp.; Campsiandra sp.; Celtis sp.; Cestrum; Cissus sp.; Cupania sp.; Cyperaceae; Cyperus sp.; DEPTH, sediment/rock; Diatom assemblage; Didymopanax sp.; Eschweilera sp.; Eugenia inundata; Euphorbiaceae; Euterpe sp.; Fabaceae; Ferns; Guatteria sp.; Hedyosmum sp.; Herbs; Heterostemon sp.; Hevea sp.; Ilex sp.; limnology; LIVC; Livingstone corer; Macrolobium sp.; Malpighiaceae; Matayba sp.; Mauritia sp.; Maytenus sp.; Melastomataceae; Meliaceae; Menispermaceae; Mimosa sp.; Moraceae; Myrsinaceae; Myrtaceae; Negro River; NGR07; Palms; Phyllanthus sp.; Poaceae; Pollen; pollen and spores; Pouteria sp.; Protium sp.; Pseudobombax; Psychotria sp.; reconstructing vegetation change; Relative abundance (counted and calculated); Rhamnaceae; Rutaceae; Sagittaria sp.; Sapium sp.; Sapotaceae; Sebastiania sp.; Senna sp.; Sloanea sp.; Spores; Sum; Terminalia sp.; Trees and shrubs; Trema sp.; Triplaris sp.; Virola sp.; Zanthoxylum sp. This dataset presents the relative abundance of pollen and spores from 68 sediment samples collected at 0.10 m intervals along core NGR07, retrieved from Lake Pacú in the lower Negro River region, Central Amazonia. The analyses were conducted to reconstruct past vegetation dynamics in response to mid- to late Holocene hydrological variability. Palynomorphs were identified using regional pollen reference collections and published identification keys. Approximately 300 grains were counted per sample (except in pollen-poor intervals), and Lycopodium spores were added as exotic markers to calculate concentration values. The dataset provides insights into shifts in floodplain forest composition, herbaceous vegetation patterns, and the evolution of modern igapó systems over time. Pollen diagrams and cluster analyses were produced using Tilia and CONISS software. |
| title | Relative abundance of pollen and spores in a sediment core from Lake Pacú, lower Negro River, Central Amazonia, during the mid- to late Holocene |
| topic | Acalypha sp.; Alchornea sp.; Alibertia sp.; Amanoa sp.; Amazon Basin; Anacardiaceae; Annonaceae; Annona sp.; Apeiba sp.; Apocynaceae; Astrocaryum sp.; Astronium sp.; Byrsonima sp.; Campsiandra sp.; Celtis sp.; Cestrum; Cissus sp.; Cupania sp.; Cyperaceae; Cyperus sp.; DEPTH, sediment/rock; Diatom assemblage; Didymopanax sp.; Eschweilera sp.; Eugenia inundata; Euphorbiaceae; Euterpe sp.; Fabaceae; Ferns; Guatteria sp.; Hedyosmum sp.; Herbs; Heterostemon sp.; Hevea sp.; Ilex sp.; limnology; LIVC; Livingstone corer; Macrolobium sp.; Malpighiaceae; Matayba sp.; Mauritia sp.; Maytenus sp.; Melastomataceae; Meliaceae; Menispermaceae; Mimosa sp.; Moraceae; Myrsinaceae; Myrtaceae; Negro River; NGR07; Palms; Phyllanthus sp.; Poaceae; Pollen; pollen and spores; Pouteria sp.; Protium sp.; Pseudobombax; Psychotria sp.; reconstructing vegetation change; Relative abundance (counted and calculated); Rhamnaceae; Rutaceae; Sagittaria sp.; Sapium sp.; Sapotaceae; Sebastiania sp.; Senna sp.; Sloanea sp.; Spores; Sum; Terminalia sp.; Trees and shrubs; Trema sp.; Triplaris sp.; Virola sp.; Zanthoxylum sp. |
| url | https://doi.org/10.1594/PANGAEA.981683 |