A Holocene record of environmental change from Río Zeballos, central Patagonia
| Autor: | Guillermo L. Mengoni Goñalons, Robert McCulloch, Rebecca Barclay, María José Figuerero Torres, Claudia A Mansilla |
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| Rok vydání: | 2016 |
| Předmět: |
Pollen analysis
010506 paleontology Archeology Global and Planetary Change geography geography.geographical_feature_category Holocene 010504 meteorology & atmospheric sciences Ecology Environmental change Ice field Paleontology Palaeoenvironments Context (language use) 01 natural sciences Arqueología Tephrochronology Physical geography Central Patagonia Geology 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | The Holocene;27(7) Filo Digital (UBA-FFyL) Universidad de Buenos Aires. Facultad de Filosofía y Letras instacron:UBA-FFyL |
| ISSN: | 1477-0911 0959-6836 |
| DOI: | 10.1177/0959683616678460 |
| Popis: | Fil: McCulloch, Robert D.. University of Stirling. Biological and Environmental Sciences; Escocia. Fil: Figuerero Torres, María José. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Arqueología; Argentina. Mengoni Goñalons, Guillermo L.. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Arqueología; Argentina. Fil: Barclay, Rebecca. University of Stirling. Biological and Environmental Sciences; Escocia. Fil: Mansilla, Claudia. University of Stirling. Biological and Environmental Sciences; Escocia. There are few continuous palaeoenvironmental records spanning the Holocene in Andean Southern Patagonia near the Northern Patagonian Ice Field (~47°S). Insights into the environmental context for human-landscape interactions have relied mostly on data extrapolated from distant extra-Andean locations that suggest limited environmental change during the Holocene. La Frontera (46°52’S), a high altitude site on the southern beech forest-steppe ecotone boundary in the Río Zeballos valley provides lithostratigraphical and palaeoecological evidence, constrained by 14C dating and tephrochronology, for dynamic environmental change during the last ~8000 years. An initial amelioration in environmental conditions after c. 8210 cal. BP was followed by a reversal to colder conditions between c. 7420 and 6480 cal. BP, coincident with initial human occupation within the Paso Roballos and Lago Pueyrredón basin. Between c. 6480 and 3700 cal. BP the woodland / steppe composition continued to fluctuate in response to climatic change. After c. 3700 cal. BP a gradual shift to more stable and temperate conditions, punctuated by increased fire activity, is contemporary with the later phases of human occupation extending up into the Paso Roballos-Río Zeballos corridor. |
| Databáze: | OpenAIRE |
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