Relative abundance of pollen and spores in a sediment core from Lake Pacú, lower Negro River, Central Amazonia, during the mid- to late Holocene

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.