Araucaria forest dynamics in relation to fire frequency in southern Brazil based on fossil and modern pollen data

Jeske-Pieruschka, Vivian; Fidelis, Alessandra; Bergamin, Rodrigo Scarton; Vélez, Eduardo; Behling, Hermann

doi:10.1016/j.revpalbo.2010.01.005

Cited by 50 publications

(27 citation statements)

References 26 publications

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“…The soil formation is affected by the high precipitation rates under subtropical humid climate. A study in the Pró-Mata area, southern Brazilian highlands (Dümig et al, 2008) describes the occurrence of black-coloured, humus-rich soils in the São Francisco de Paula Hueck, 1953), slightly modified and (c) the position of the Rincão das Cabritas (RdC) core together with the other studies performed in the region of São Francisco de Paula and the highlands of Rio Grande do Sul state: 1, Aparados da Serra (Roth and Lorscheitter, 1993); 2, Fazenda do Pinto (Behling et al, 2001); 3, Cambará do Sul (Behling et al, 2004); 4, Alpes de São Francisco (Leonhardt and Lorscheitter, 2010); and 5, São José dos Ausentes (Jeske-Pieruschka et al, 2010) region, which can be classified as Andosols, Umbrisols and Cambisols.…”

Section: Locationmentioning

confidence: 92%

Palaeoenvironmental history of the São Francisco de Paula region in southern Brazil during the late Quaternary inferred from the Rincão das Cabritas core

Jeske-Pieruschka

Behling

2011

The Holocene

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We present new palaeoenvironmental data from a 281 cm long sediment core studied by means of pollen and charcoal analyses from Rincão das Cabritas of the São Francisco de Paula area, which lies in the wettest region of southern Brazil at the present time. The high-resolution record, dated with seven AMS dates, spans the last 16 700 cal. BP. The continuous presence of grassland vegetation (Campos) throughout the glacial period reflects cold and markedly drier climatic conditions than today. Nowadays, remote areas of Campos on the highlands represent remnants of an early and widely expanded vegetation of glacial times that was gradually replaced by forest ecosystems during the late Holocene. Araucaria forest began to develop after 3200 cal. BP, with its expansion over Campos starting at about 2950 cal. BP. This was probably due to the presence of a somewhat wetter climate after about 4600 cal. BP, which supported the initial development of forest ecosystems and allowed Atlantic rainforest to spread from the lower regions upwards to higher elevations. The maximum expansion of Araucaria forest took place during the last 1000 years, when it started to be the prevailing vegetation type. This vegetational change coincides with increased precipitation and continuously wetter climatic conditions since 1050 cal. BP. The reconstructed fire history indicates a presence of human-related fires on the highlands from the Late Pleistocene until the mid Holocene. Fire activity was markedly reduced after about 3000 cal. BP when forest expanded continuously under regional wetter climatic conditions.

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Section: Locationmentioning

confidence: 92%

Palaeoenvironmental history of the São Francisco de Paula region in southern Brazil during the late Quaternary inferred from the Rincão das Cabritas core

Jeske-Pieruschka

Behling

2011

The Holocene

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“…Os fi tólitos carbonizados do horizonte Ap decorrem das periódicas queimadas promovidas pela ação antrópica como meio de manejo moderno da área de estudo para o pastoreio (PAISANI et al, 2016a). Ao passo que sua presença nos demais níveis tem sido interpretada como resultante tanto de incêndios provocados por índios antes da colonização no século XIX (paleoíndios), quanto por incêndios naturais comuns a superfícies geomórfi cas similares do Sul do Brasil (BEHLING, 1997;BEHLING et al, 2004;JESKE-PIERUSCHKA et al, 2010;PAISANI et al, 2013). A presença de fi tólitos carbonizados nos níveis mais profundos (horizontes 6Cb e 8CAb), deve ser exclusivamente relacionada a este último fator.…”

Section: Análise Fi Tolítica (Seção Hs18)unclassified

Dinâmica De Rampa De Colúvio Na Superfície De Palmas/Água Doce Durante O Quaternário Tardio – Bases Para Compreender a Evolução Das Encostas No Planalto Das Araucárias

Paisani

Osterrieth

et al. 2017

Rev. Bras. Geomorfol.

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Resumo:O termo rampa de colúvio consiste em unidade de relevo suavemente inclinada em direção ao fundo dos vales mantida por colúvios, por vezes recobrindo terraços aluviais e reentrâncias (hollows) ou depressões em anfi teatro. O presente trabalho visou determinar a dinâmica de rampa de colúvio da superfície de Palmas/Água Doce, ao longo do Quaternário Tardio, bem como tecer considerações a respeito do ambiente de encostas em superfícies de cimeira do Planalto das Araucárias, sul do Brasil. Aplicou-se a análise pedoestratigráfi ca em duas seções representativas dos materiais de rampa de colúvio, bem como a geocronologia (métodos 14 C e LOE)

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“…Raw count data matrixes were either received via e-mail by the authors of their respective palynological contributions or obtained from our published palynological results. We selected pollen-spore raw count data for the: (a) 44 and (e) present pollen-rain (four samples) from northeastern Patagonia, very close to the fossil collecting site 45 . Differences in rarefied species richness were tested among all of these South American spore-pollen assemblages using analysis of variance (ANOVA).…”

Section: Jmentioning

confidence: 99%

Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift

et al. 2014

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The Patagonian steppe-a massive rain-shadow on the lee side of the southern Andes-is assumed to have evolved B15-12 Myr as a consequence of the southern Andean uplift. However, fossil evidence supporting this assumption is limited. Here we quantitatively estimate climatic conditions and plant richness for the interval B10-6 Myr based on the study and bioclimatic analysis of terrestrially derived spore-pollen assemblages preserved in well-constrained Patagonian marine deposits. Our analyses indicate a mesothermal climate, with mean temperatures of the coldest quarter between 11.4°C and 16.9°C (presently B3.5°C) and annual precipitation rarely below 661 mm (presently B200 mm). Rarefied richness reveals a significantly more diverse flora during the late Miocene than today at the same latitude but comparable with that approximately 2,000 km further northeast at mid-latitudes on the Brazilian coast. We infer that the Patagonian desertification was not solely a consequence of the Andean uplift as previously insinuated.

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Araucaria forest dynamics in relation to fire frequency in southern Brazil based on fossil and modern pollen data

Cited by 50 publications

References 26 publications

Palaeoenvironmental history of the São Francisco de Paula region in southern Brazil during the late Quaternary inferred from the Rincão das Cabritas core

Palaeoenvironmental history of the São Francisco de Paula region in southern Brazil during the late Quaternary inferred from the Rincão das Cabritas core

Dinâmica De Rampa De Colúvio Na Superfície De Palmas/Água Doce Durante O Quaternário Tardio – Bases Para Compreender a Evolução Das Encostas No Planalto Das Araucárias

Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift

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