Late-glacial and Holocene vegetation history of the Magellanic rain forest in southwestern Patagonia, Chile

Fesq-Martin, Martinus; Friedmann, Arne; Peters, Michael; Behrmann, Jan H.; Kilian, Rolf

doi:10.1007/s00334-004-0047-6

Cited by 47 publications

(37 citation statements)

References 13 publications

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“…McCulloch et al 2000;Kilian et al 2007), possibly the best approximation comes from the work of Lamy et al (2004), who suggested that changes in the Pleistocene extent of the Patagonian Ice Field had a 1000 year delayed response to changes in Pacific surface water temperatures at about 12 ka BP). This age is in line with the evolution of the Magellanic rainforest at about 11 ka BP (Fesq- Martin et al 2004). Taking the hemipelagic section of the longest cores into account (644 mm, Table 1) approximate sedimentation rates over this time span would at least be 0.6 mm a À1 (644 mm in 11 ka).…”

Section: The Potential Role Of Turbidites As Seismic Indicatorsmentioning

confidence: 83%

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Heberer

Röser²,

Behrmann

et al. 2010

JGS

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Sedimentology, petrography and the provenance of Holocene sediments from the Southern Chile Trench (36-478S) were investigated in an integrated approach combining description of a collection of gravity cores, measurements of physical properties, quantitative X-ray petrography and modal analysis. The sediments studied were trench hemipelagic sediments, fan deposits, and more distal hemipelagic sediments from the Nazca Plate. The trench is mostly fed by multiple point sources via submarine canyons. Sandy turbidites show a southward increase in sediment maturity. Whereas volcanic lithic fragments and plagioclase represent the dominant fraction in the north, quartz content strongly increases in the southern part of the study area, in line with source lithologies. Further north, active volcanoes in the Main Cordillera represent almost the entire provenance signal as a result of a strong contribution of highly erodible volcanic rocks. Recurrence rates of sandy and silty turbidites in the trench fan sediments indicate a link to the palaeoseismic record on land. Our study documents the potential usefulness of proximal turbidites to reconstruct palaeoseismicity, even at a scale of single segments of the plate boundary.

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Section: The Potential Role Of Turbidites As Seismic Indicatorsmentioning

confidence: 83%

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Heberer

Röser²,

Behrmann

et al. 2010

JGS

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“…4.1) include C org and Zr contents, and a layer of glacial clay; d) Peat core GC-2 from the Bahia Bahamondes area, northeast of Gran Campo Nevado (Locality in Fig. 4.1) with lithological characteristics (minerogenic and glaci-limnic) and % diagram of the terrestrial Nothofagus, Gunnera and Graminae pollen (Fesq-Martin et al, 2004). Hidrografico y oceanografico de la Armada de Chile (SHOA).…”

Section: Morphology and Bathymetrymentioning

confidence: 99%

“…4.1 and 6b) has been dated by seven AMS 14 C-ages (Table 1; Franzen et al, 2004;Fesq-Martin et al, 2004) and tephrachronology . Details of the pollen spectrum are given by Fesq-Martin et al (2004). Sedimentation and pollen deposition at this site could not have started before significant recession of the glacier in Gajardo Channel (Fig.…”

Section: Pollen Recordmentioning

confidence: 99%

Palaeoecological constraints on late Glacial and Holocene ice retreat in the Southern Andes (53°S)

Kilian

Schneider

Koch

et al. 2007

Global and Planetary Change

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“…Based on radiocarbon‐dated pollen records, Villagrán (, ) proposed a biogeographic scenario for south‐central Chile: plant populations migrated northwards during the glacial periods, and southwards during the interglacials. However, in the Patagonian Channel region, fossils of Nothofagus pollen (e.g., Bennett, Haberle, & Lumley, ; Fesq‐Martin, Friedmann, Peters, Behrmann, & Kilian, ; Haberle & Bennett, ; Lumley & Switsur, ; Montade et al., ; Villagrán, ) and of flightless beetles (Ashworth & Markgraf, ; Ashworth, Markgraf, & Villagrán, ) have been recovered even from the lowermost strata. This was interpreted as evidence for closely adjacent refugia.…”

Section: Introductionmentioning

confidence: 99%

Tabula rasa in the Patagonian Channels? The phylogeography of Oreobolus obtusangulus (Cyperaceae)

2017

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The extent of the Pleistocene glaciations in the Patagonian Channel region (southwesternmost South America) and their impact on the vegetation there are largely unknown. Whether the regional flora was wiped out completely (tabula rasa) or survived in ice-free pockets (in situ survival) is still an open question. The molecular imprint of either scenario should still be visible in extant populations. Therefore, DNA sequence data of Oreobolus obtusangulus Gaudich. (Cyperaceae) were analysed. This species is an abundant constituent of Patagonian cushion peat bogs, one of the Patagonian Channel region's major vegetation types. Three hundred and eighty-four individuals from 48 populations were sequenced for two chloroplast (ycf3-psaA and trnQ -psbK intergenic spacers) and 14 nuclear loci containing simple sequence repeats (SSRs; microsatellites). Phylogenetic reconstructions and the geographic distribution of genetic diversity revealed that the species was split into three main lineages whose general distributions comprise three separate major regions, that is, south-central Chile, Fuego-Patagonia and the East Patagonian Andes, which probably constitute glacial refugia. Postglacial migration fronts formed a suture zone with high levels of genetic diversity in the Northwest Patagonian Andes, where remnants of a supposedly ancestral lineage were also found to be locally restricted to a single population (Huinay). The heavily glaciated Patagonian Channels were likely recolonized from the northwest, and partly from the south. Although the westernmost Patagonian Channel population (Estero Bachem) harboured private SSR alleles (singletons) and showed slightly elevated genetic diversity, it remained unclear whether this population actually survived in situ. This study helps fill a major gap in reconstructing the Pleistocene vegetation history of West and Andean Patagonia.

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Late-glacial and Holocene vegetation history of the Magellanic rain forest in southwestern Patagonia, Chile

Cited by 47 publications

References 13 publications

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Palaeoecological constraints on late Glacial and Holocene ice retreat in the Southern Andes (53°S)

Tabula rasa in the Patagonian Channels? The phylogeography of Oreobolus obtusangulus (Cyperaceae)

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