Distribution of dinoflagellate cysts and other aquatic palynomorphs in surface sediments from the Beagle Channel, Southern Argentina

Candel, María Soledad; Radi, Taoufik; Vernal, Anne de; Bujalesky, Gustavo Gabriel

doi:10.1016/j.marmicro.2012.06.009

Cited by 30 publications

(43 citation statements)

References 32 publications

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“…The palynological records from the arroyo Baliza site have a similar composition to those observed in surface samples from the Beagle Channel (Candel et al, 2012), with a higher diversity of dinoflagellate cyst species, suggesting that the environmental conditions during the late holocene are comparable to today. It indicates that most of the marine species were able to persist in the area even during neoglacial climatic deterioration (Candel et al, in press).…”

Section: S Quanta Votadinium Spinosum Reid 1977 Polykrikos Kofoidiimentioning

confidence: 55%

“…The aquatic palynomorph assemblages, mainly dinoflagellate cysts, are dominated by Peridiniales over Gonyaulacales taxa (Candel et al, 2012 Channel showed similarities with those of high latitude regions of the Northern hemisphere (Candel et al, 2012).…”

Section: Surface Sediments Samples As Modern Ana-loguesmentioning

confidence: 93%

“…Studies on dinocyst assemblages and palynofacies from Late Quaternary deposits of the southern South america are still limited to a few contributions (Borromei andQuattrocchio, 2001, 2007;Grill et al, 2002;Candel et al, 2009Candel et al, , 2011Candel et al, , 2012Rabassa et al, 2009;Candel, 2010;Fernández et al, 2014).…”

Section: Resumen Revisión De La Reconstrucción Paleoambiental De Secmentioning

confidence: 99%

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Review of the Palaeoenvironmental Reconstruction of Late Quaternary Marine Sequences, Tierra Del Fuego (Argentina)

Candel

Borromei

2016

PEAPA

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Abstract. This work is an updated review of the knowledge on the evolution and development of palaeoenvironments during the holocene marine ingression and posterior regressive event in Tierra del Fuego. During the beginning of the marine transgression, ca. 8,000 cal yr BP, the vegetation in the southern coastal areas along the Beagle Channel was mainly arboreal with dominance of Nothofagus forest and scarcity of shrub and herbaceous communities, while in the northeastern atlantic coast, the treeless steppe was replaced by a relatively open Nothofagus forest. The early-Middle holocene aquatic assemblages were characterized by a scarce occurrence of marine components, especially dinoflagellate cysts, suggesting the development of low energy estuarine environments with low-salinities caused by glacier meltwater discharge. after 6,000 cal yr BP, an increase in the number of aquatic species was observed with dominance of Peridiniales dinoflagellate cysts, indicating the establishment of marginal marine environments with low to moderate salinities and high nutrient levels. During the last 1,000 cal yr BP, the littoral vegetation along the Beagle Channel showed an open Nothofagus forest and the development of peatlands, while in the northeastern atlantic coast the steppe vegetation developed under less humid environmental conditions related to the marine regressive event. These assemblages have a similar composition to those observed in modern sediments of the Beagle Channel and suggest palaeoenvironmental conditions comparable to today.

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Section: S Quanta Votadinium Spinosum Reid 1977 Polykrikos Kofoidiimentioning

confidence: 55%

Section: Surface Sediments Samples As Modern Ana-loguesmentioning

confidence: 93%

Section: Resumen Revisión De La Reconstrucción Paleoambiental De Secmentioning

confidence: 99%

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Review of the Palaeoenvironmental Reconstruction of Late Quaternary Marine Sequences, Tierra Del Fuego (Argentina)

Candel

Borromei

2016

PEAPA

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“…The dinocyst assemblages and other aquatic palynomorphs were compared with modern forms from surface samples of the Beagle Channel (Candel et al . ). The aquatic palynomorphs identified in Aserradero‐Lapataia 2 are listed in Table and the photomicrographs are shown in Fig.…”

Section: Methodsmentioning

confidence: 97%

Early to middle Holocene palaeoenvironmental reconstruction of the Beagle Channel (southernmost Argentina) based on terrestrial and marine palynomorphs

Candel

Borromei

Louwye

2018

Boreas

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This paper presents the main palaeoenvironmental results obtained from a site located in the western sector of the Beagle Channel, Isla Grande de Tierra del Fuego, southernmost Argentina. The palynological analysis performed on marine sediments from Aserradero‐Lapataia 2 (latitude 54°51′22.7″S, longitude 68°34′22.8″W) allowed us to document the evolution of palaeoenvironmental conditions during the beginning of the Holocene marine transgression into the Beagle Channel. The results indicate that, prior to the marine incursion, the coastal areas were characterized by the presence of open‐grown shrubs and herbs along with woodland palaeocommunities. The aquatic environments were dominated exclusively by freshwater taxa. Around 8300 cal. a BP, seawater gradually flooded the channel while cold and high effective moisture conditions favoured the development of an arboreal vegetation with dominance of Nothofagus forest and scarcity of shrub and herbaceous communities. Gradually increasing salinities allowed the development of freshwater/marine transitional environments indicated by aquatic palynomorphs able to tolerate stressed conditions under fluctuating salinities. The increasing dinocyst diversification with dominance of heterotrophic taxa corroborates the establishment of a fully marine environment during the middle–late Holocene in the Beagle Channel.

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“…Phytoclasts (~25%) consist of small woody tissues and inertinite fragments with angular or rounded shapes. The decrease in dinoflagellate diversity might be explained by the dilution of marine microfossils due to high sedimentation rate or low cyst fluxes related to low productivity (Candel et al, 2012).…”

Section: Marginal Dysoxic-anoxic Basinmentioning

confidence: 99%

Palynofacies and geochemical analysis of Oligo-Miocene bituminous rocks from the Moldavidian Domain (Eastern Carpathians, Romania): Implications for petroleum exploration

Ţabără

Pacton

Makou

et al. 2015

Review of Palaeobotany and Palynology

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Distribution of dinoflagellate cysts and other aquatic palynomorphs in surface sediments from the Beagle Channel, Southern Argentina

Cited by 30 publications

References 32 publications

Review of the Palaeoenvironmental Reconstruction of Late Quaternary Marine Sequences, Tierra Del Fuego (Argentina)

Review of the Palaeoenvironmental Reconstruction of Late Quaternary Marine Sequences, Tierra Del Fuego (Argentina)

Early to middle Holocene palaeoenvironmental reconstruction of the Beagle Channel (southernmost Argentina) based on terrestrial and marine palynomorphs

Palynofacies and geochemical analysis of Oligo-Miocene bituminous rocks from the Moldavidian Domain (Eastern Carpathians, Romania): Implications for petroleum exploration

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