17:15 〜 18:45
[HQR04-P05] Reconstruction of the Holocene Environmental History in Central Taiwan Based on Pollen Records
キーワード：Toushe Basin, Holocene, palynology, stable carbon isotope, climate change
Abstract
To address the demand for high-resolution paleoclimate data for enhanced prediction of future climate conditions, this research investigates a peat core approximately 8 meters in length, extracted from the Toushe Basin in central Taiwan. To specifically investigate Holocene climatic trends, the study analyzed the upper 6 meters of the core, covering a period of approximately 11000 cal BP. To improve the temporal resolution of the pollen record, samples were collected at 2 cm intervals, facilitating continuous pollen analysis for the reconstruction of vegetation and climate conditions in the Toushe Basin over the Holocene period. By analyzing the fluctuation in the abundance of cold and warm pollen types along with stable carbon isotopes records, paleoclimate changes in the Toushe Basin were reconstructed. The main dominant fossils in the current study include herbaceous plants such as Poaceae, Artemisia, and Cyperaceae, as well as arboreal plants like Quercus/Cyclobalanopsis, Castanopsis/Pasania, Salix, and fern spores.The carbon isotopes record from the basin revealed three distinct climate phases: The Early Holocene (11700-8200 cal BP) characterized by a drier phase, the Mid-Holocene (8200-4200 cal BP) marked by a wet phase, and the Late Holocene (4200-1800 cal BP) distinguished by another dry phase. The pollen records from the current study aligned with climate phases indicated by carbon isotope record, indicating a shift in the abundance of arboreal plants to herbaceous plants in the region from the during the Holocene period.
To address the demand for high-resolution paleoclimate data for enhanced prediction of future climate conditions, this research investigates a peat core approximately 8 meters in length, extracted from the Toushe Basin in central Taiwan. To specifically investigate Holocene climatic trends, the study analyzed the upper 6 meters of the core, covering a period of approximately 11000 cal BP. To improve the temporal resolution of the pollen record, samples were collected at 2 cm intervals, facilitating continuous pollen analysis for the reconstruction of vegetation and climate conditions in the Toushe Basin over the Holocene period. By analyzing the fluctuation in the abundance of cold and warm pollen types along with stable carbon isotopes records, paleoclimate changes in the Toushe Basin were reconstructed. The main dominant fossils in the current study include herbaceous plants such as Poaceae, Artemisia, and Cyperaceae, as well as arboreal plants like Quercus/Cyclobalanopsis, Castanopsis/Pasania, Salix, and fern spores.The carbon isotopes record from the basin revealed three distinct climate phases: The Early Holocene (11700-8200 cal BP) characterized by a drier phase, the Mid-Holocene (8200-4200 cal BP) marked by a wet phase, and the Late Holocene (4200-1800 cal BP) distinguished by another dry phase. The pollen records from the current study aligned with climate phases indicated by carbon isotope record, indicating a shift in the abundance of arboreal plants to herbaceous plants in the region from the during the Holocene period.