Modern pollen and vegetation relationships in northeastern Patagonia (Golfo San Matías, Río Negro)

Marcos, Maria Alejandra; Mancini, María Virginia

doi:10.1016/j.revpalbo.2011.11.007

Cited by 25 publications

(15 citation statements)

References 32 publications

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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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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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“…are present (5%). The lowest value ( E ( Tn )) was 7.67 with ranges between 6 and 9 pollen types (Marcos and Mancini, 2012).…”

Section: Resultsmentioning

confidence: 98%

“…In addition, local and regional surface samples were analyzed to help interpret the fossil pollen record. Local surface samples ( N =26) were collected from the main geomorphological units present in the area: Mobile Dunes, Fixed Dunes, Fluvial Landscape and Ephemeral Lake (Marcos and Mancini, 2012). And, 18 surface samples were taken from different vegetation units of the region: Monte-Espinal, Monte and Monte-Patagonian Steppe (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Middle- to late-Holocene environmental changes in Bajo de la Quinta, NE Patagonia, inferred by palynological records and their relation to human occupation

2012

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The north Patagonian region between 38° and 42°S extends along the proximity of two major atmospheric circulation features in South America: the northern border of the southern westerly circulation belt, and the northeast trade wind circulation associated with the subtropical South Atlantic Anticyclone. The influence of this westerly wind system determines the annual and seasonal precipitation regimen in north Patagonia,

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“…Estas señales de cambio se intensifican en los últimos 1.500 años aP y pueden ser evaluadas en el marco de un proceso de diversificación en la dieta, como ya fuera propuesto por Favier Dubois y coautores (2009). Estos autores consideraron un posible escenario de aumento demográfico a nivel regional, lo que podría haber favorecido la saturación de espacios favorables durante el Holoceno tardío final, acompañado además de un posible deterioro de los ambientes continentales cercanos durante el Período Cálido Medieval (Favier Dubois et al 2009:994; Marcos y Mancini 2012). Estos planteos se corresponden con la información cronológica (Favier Dubois 2013) en la que se observa un pico en la frecuencia de ocupaciones y en los tamaños de loci para el Holoceno tardío final.…”

Section: Discussionunclassified

5.000 Años De Pesca en La Bahía San Antonio, Río Negro, Patagonia Argentina

Scartascini¹

2017

Latin Am. antiq.

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El objetivo de este trabajo es caracterizar el registro ictioarqueológico y discutir las variaciones cronológicas en la explotación de los peces en la localidad arqueológica de Bahía San Antonio y su área de influencia, en la costa norte de la provincia de Río Negro, Patagonia Argentina. La muestra analizada alcanza los 7.473 restos ictioarqueológicos, que provienen tanto de excavaciones como de contextos superficiales. Se determinaron las especies y las partes representadas y se estimaron las tallas de Micropogonias furnieri a partir de los otolitos recuperados. Los resultados indican cambios temporales en el uso de los peces en el área, tanto en la frecuencia como en la diversidad de especies. Finalmente, se ponderan estos resultados en relación a la información disponible a nivel regional y se discute el rol de la pesca en este sector del espacio costero norpatagónico.

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Modern pollen and vegetation relationships in northeastern Patagonia (Golfo San Matías, Río Negro)

Cited by 25 publications

References 32 publications

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

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

Middle- to late-Holocene environmental changes in Bajo de la Quinta, NE Patagonia, inferred by palynological records and their relation to human occupation

5.000 Años De Pesca en La Bahía San Antonio, Río Negro, Patagonia Argentina

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