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Temperate rainforest response to climate change and disturbance agents in northwestern Patagonia (41°S) over the last 2600 years

Authordc.contributor.authorJara, Ignacio A. 
Authordc.contributor.authorMoreno Moncada, Patricio es_CL
Cita de ítemdc.identifier.citationQuaternary Research 77 (2012) 235–244es_CL
Abstractdc.description.abstractWe present detailed pollen and charcoal records from Lago Pichilafquén (~41°S) to decipher the effects of climate change and varying disturbance regimes on the composition and structure of the vegetation on the Andean foothills of northwestern Patagonia during the last 2600 yr. Here, temperate rainforests have dominated the landscape since 2600 cal yr BP with variations ranging from cool-temperate and wet north Patagonian rainforests to relatively warm and summer-drought-resistant Valdivian rainforests. We interpret relatively warm/ dry conditions between 1900–2600, 690–750 and 320–430 cal yr BP, alternating with cold/wet conditions between 1500–1900, 750–1100 and 430–690 cal yr BP. Rapid deforestation and spread of plants introduced by Europeans occurred at 320 and 140 cal yr BP. The record includes five tephras with ages of 2130, 1460, 1310, 1210, and 340 cal yr BP, all of which precede local fire events and increases in trees favored by disturbance by less than 100 yr. We conclude that centennial-scale changes in the southern westerlies were the primary driver of vegetation shifts in northwestern Patagonia over the last 2600 yr. Within this interval, local disturbance regimes altered the structure, composition, and dynamics of the lowland rainforest vegetation during several discrete, short-lived episodes.es_CL
Patrocinadordc.description.sponsorshipThis research was funded by FONDECYT grants #1070991 and 1110612, the Institute of Ecology and Biodiversity (ICM P02-051), and PFB-23.es_CL
Keywordsdc.subjectNW Patagoniaes_CL
Títulodc.titleTemperate rainforest response to climate change and disturbance agents in northwestern Patagonia (41°S) over the last 2600 yearses_CL
Document typedc.typeArtículo de revistaes_CL

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