Human Influence Versus Natural Climate Variability
Periodo de realización: 1900/01/01 al 2019/01/01
Tipo: Capítulo de libro
Lugar(es) de estudio: Península de Yucatán
Resumen: "Thischapterdiscussespastclimatechangedriversandecologicalresponses in southeastern Mexico. Ancient human influence on ecosystems is evident from sedi- ment cores. Past human activities are evident in fossil records but make the interpreta- tion of the past climatic signals more difficult. Conversely the human signal provides important evidence for understanding the level of human impact on the climate sys- tem and ecosystems. Four sediment cores at different locations of the Yucatán Peninsula were analyzed for fossil pollen and geochemistry. Human-induced ecologi- cal change was evaluated compared to climate-driven environmental change. Fossil pollen gave a clear signal of landscape and precipitation change in the Preclassic and Classic periods. The geochemical ratios provided evidence of local and regional hydrological change. The Chumpich Lake registry reveals that the management of low forests was efficient and indicates good hydrological control in the landscape. However this evidence is different in other sites from Yucatán Peninsula with deficient erosion control. Probably due to the differential climate response in the Chumpich– Uxul region, the drought was not as drastic as in other places."