From bi-polar to regional distribution of modern dinoflagellate cysts, an overview of their biogeography

Marret, Fabienne; Bradley, L. R.; Vernal, Anne de; Hardy, William; Kim, So Young; Mudie, Peta J.; Penaud, Aurélie; Pospelova, Vera; Price, Andrea; Radi, Taoufik; Rochon, André

doi:10.1016/j.marmicro.2019.101753

Cited by 50 publications

(57 citation statements)

References 95 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…are common (Prebble et al, 2013). Selenopemphix antarctica is a species that shows affinity to sea-ice conditions (Zonneveld et al, 2013;Marret et al, 2019).…”

Section: Dinocyst Paleoecological Affinitymentioning

confidence: 99%

“…Selenopemphix antarctica, a major component of the modern Antarctic-coastal assemblages(Zonneveld et al, 2013), is never abundant, and present only in few samples (between 390.44-333 mbsf, and at 302 mbsf). I. pallidium, a dinocyst abundant in polar areas of the 310 modern ocean(Zonneveld et al, 2013;Marret et al, 2019) has a scattered low presence throughout the record.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Temperate Oligocene surface ocean conditions offshore Cape Adare, Ross Sea, Antarctica

Hoem¹,

Valero²,

Evangelinos³

et al. 2020

Preprint

View full text Add to dashboard Cite

Abstract. Antarctic continental ice masses fluctuated considerably in size during the elevated atmospheric CO2 concentrations (~ 600–800 ppm) of the Oligocene “coolhouse”. To evaluate the role of ocean conditions to the Oligocene ice sheet variability requires understanding of past ocean conditions around the ice sheet. While warm ocean conditions have been reconstructed for the Oligocene Wilkes Land region, questions arise on the geographical extent of that warmth. Currently, we lack data on surface ocean conditions from circum-Antarctic locations, and ice-proximal to ice-distal temperature gradients are poorly documented. In this study, we reconstruct past surface ocean conditions from glaciomarine sediments recovered from the Deep Sea Drilling Project (DSDP) Site 274, offshore the Ross Sea continental margin. This site offshore Cape Adare is ideally located to characterise the Oligocene regional surface ocean conditions, as it is situated between the colder, ice-proximal Ross Sea continental shelf, and the warm-temperate Wilkes Land Margin in the Oligocene. We improve the existing age model of DSDP Site 274 using integrated bio- and magnetostratigraphy. Subsequently, we analyse dinoflagellate cyst assemblages and lipid biomarkers (TEX86) to reconstruct surface paleoceanographic conditions during the Oligocene (33.7–25.4 Ma). Both TEX86-based sea surface temperature (SST) and microplankton results show temperate (10–17 °C ± 5.2 °C) surface ocean conditions at Site 274 throughout the Oligocene. Increasingly similar oceanographic conditions between offshore Wilkes Land margin and Cape Adare developed towards the late Oligocene (26.5–25.4 Ma), likely in consequence of the widening of the Tasmanian Gateway, which resulted in more interconnected ocean basins and frontal systems. To maintain marine terminations of terrestrial ice sheets in a proto-Ross Sea with as warm offshore SST as our data suggests, requires a strong ice flux fed by intensive precipitation during colder orbital states in the Antarctic hinterland, but with extensive surface melt of terrestrial ice during warmer orbital states.

show abstract

“…are common (Prebble et al, 2013). Selenopemphix antarctica is a species that shows affinity to sea-ice conditions (Zonneveld et al, 2013;Marret et al, 2019).…”

Section: Dinocyst Paleoecological Affinitymentioning

confidence: 99%

mentioning

confidence: 99%

Temperate Oligocene surface ocean conditions offshore Cape Adare, Ross Sea, Antarctica

Hoem¹,

Valero²,

Evangelinos³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…The data with back-tracked origin locations can be accessed on planktondrift.science.uu.nl. The datasets with measured dinocysts and planktic foraminifera data are from Marret et al (2019) and Siccha and Kucera (2017) respectively.…”

Section: Discussionmentioning

confidence: 99%

Sedimentary microplankton distributions are shaped by oceanographically connected areas

Nooteboom

Bijl

Kehl

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. Having descended through the water column, microplankton in ocean sediments are representative for the ocean surface environment, where they originated from. Sedimentary microplankton is therefore used as an archive of past and present surface oceanographic conditions. However, these particles are advected by turbulent ocean currents during their sinking journey. So far, it is unknown to what extent this particle advection shapes the microplankton composition in sediments. Here we use global simulations of sinking particles in a strongly eddying global ocean model, and define ocean bottom provinces based on the particle surface origin locations. We find that these provinces can be detected in global datasets of sedimentary microplankton assemblages, demonstrating the effect provincialism has on the composition of sedimentary remains of surface plankton. These provinces explain the microplankton composition, together with e.g. ocean surface environment. Connected provinces have implications on the optimal spatial extent of microplankton sediment sample datasets that are used for palaeoceanographic reconstructions, and on the optimal spatial averaging of sediment samples over global datasets.

show abstract

“…High-latitude TEX 86 -SST reconstructions are believed to be skewed towards summer temperatures (Schouten et al, 2013;Ho et al, 2014), but studies around Antarctica have found that archaea appear most abundantly in winter and early spring, with maximum abundances in the subsurface at around 100 m (e.g. Church et al, 2003;Kalanetra et al, 2009;Massana et al, 1998). However, there is a general agreement that TEX 86 captures the relative SST trend (Richey and Tierney, 2016) remarkably well despite these uncertainties, and this will be our main focus when interpreting the results.…”

Section: Tex 86 Overprints and Biasmentioning

confidence: 93%

Temperate Oligocene surface ocean conditions offshore of Cape Adare, Ross Sea, Antarctica

et al. 2021

View full text Add to dashboard Cite

Abstract. Antarctic continental ice masses fluctuated considerably during the Oligocene “coolhouse”, at elevated atmospheric CO2 concentrations of ∼600–800 ppm. To assess the role of the ocean in the Oligocene ice sheet variability, reconstruction of past ocean conditions in the proximity of the Antarctic margin is needed. While relatively warm ocean conditions have been reconstructed for the Oligocene offshore of Wilkes Land, the geographical extent of that warmth is unknown. In this study, we reconstruct past surface ocean conditions from glaciomarine sediments recovered from Deep Sea Drilling Project (DSDP) Site 274 offshore of the Ross Sea continental margin. This site, located offshore of Cape Adare is ideally situated to characterise Oligocene regional surface ocean conditions, as it is situated between the colder, higher-latitude Ross Sea continental shelf and the warm-temperate Wilkes Land margin in the Oligocene. We first improve the age model of DSDP Site 274 using integrated bio- and magnetostratigraphy. Subsequently, we analyse organic walled dinoflagellate cyst assemblages and lipid biomarkers (TEX86, TetraEther indeX of 86 carbon atoms) to reconstruct surface palaeoceanographic conditions during the Oligocene (33.7–24.4 Ma). Both TEX86-based sea surface temperature (SST) and microplankton results show temperate (10–17 ∘C ± 5.2 ∘C) surface ocean conditions at Site 274 throughout the Oligocene. Oceanographic conditions between the offshore Wilkes Land margin and Cape Adare became increasingly similar towards the late Oligocene (26.5–24.4 Ma); this is inferred to be the consequence of the widening of the Tasmanian Gateway, which resulted in more interconnected ocean basins and frontal systems. Maintaining marine terminations of terrestrial ice sheets in a proto-Ross Sea with offshore SSTs that are as warm as those suggested by our data requires a strong ice flux fed by intensive precipitation in the Antarctic hinterland during colder orbital states but with extensive surface melt of terrestrial ice during warmer orbital states.

show abstract

From bi-polar to regional distribution of modern dinoflagellate cysts, an overview of their biogeography

Cited by 50 publications

References 95 publications

Temperate Oligocene surface ocean conditions offshore Cape Adare, Ross Sea, Antarctica

Temperate Oligocene surface ocean conditions offshore Cape Adare, Ross Sea, Antarctica

Sedimentary microplankton distributions are shaped by oceanographically connected areas

Temperate Oligocene surface ocean conditions offshore of Cape Adare, Ross Sea, Antarctica

Contact Info

Product

Resources

About