Atlas of modern dinoflagellate cyst distributions in the Black Sea Corridor: from Aegean to Aral Seas, including Marmara, Black, Azov and Caspian Seas

Mudie, Peta J.; Marret, Fabienne; Mertens, Kenneth Neil; Shumilovskikh, Lyudmila; Leroy, Suzanne A G

doi:10.1016/j.marmicro.2017.05.004

Cited by 78 publications

(79 citation statements)

References 291 publications

(474 reference statements)

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“…Dinoflagellate assemblages are dominated by Operculodinium centrocarpum , Lingulodinium machaerophorum , Spiniferites ramosus , Brigantedinium simplex and B. cariacoense , pointing to a salinity range between 14.5 and 18‰ (Mudie et al . ).…”

Section: Discussion and Interpretationmentioning

confidence: 97%

Environmental conditions in northwestern Russia during MIS 5 inferred from the pollen stratigraphy in a sediment core from Lake Ladoga

Andreev

Shumilovskikh

Savelieva

et al. 2019

Boreas

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Lake Ladoga hosts preglacial sediments, although the Eurasian ice sheet overrode the area during the LGM. These sediments were first discovered by a seismic survey and are investigated using a 22.75-m-long core. Its upper 13.30 m comprise Holocene and Lateglacial sediments separated from the lower 11.45 m of preglacial sediments by a hiatus. They consist of highly terrigenous lacustrine sediments, which according to OSL dating, were deposited during an early stage of the last ice age (MIS 5). The palynological data allow a first reconstruction of the Early Weichselian environmental history for northwestern Russia. Birch and alder forestswith broad-leaved taxa dominated during MIS 5d (c. 118-113 ka), suggesting a climate more favourable than in the Holocene. A high content of well-sorted sands and poorly preserved palynomorphs indicates a shallow-water environment at least temporarily. More fine-grained sediments and better preserved organic remains suggest deeper water environments at the core location during MIS 5c (c. 113-88 ka). Pine and spruce became dominant, while broad-leaved taxa started to disappear, especially after c. 90 ka, pointing to a gradual climate cooling. An increase in open herb-dominated habitats at the beginning of MIS 5b (c. 88-86 ka) reflects a colder and dryer climate. However, later (c. 86-82 ka) pine and spruce again became more common. Birch and alder forests dominated in the area c. 82-80 ka (beginning of MIS 5a). Although open treeless habitats also became more common at this time, a slight increase in hazel may point to somewhat warmer climate conditions coinciding with the beginning of MIS 5a. The studied sediments also contain numerous remains of freshwater algae and cysts of marine and brackish-water dinoflagellates and acritarchs documenting that the present lake basin was part of a brackish-water basin during the Early Weichselian, probably as a gulf of the Pre-Baltic Sea.

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Section: Discussion and Interpretationmentioning

confidence: 97%

Environmental conditions in northwestern Russia during MIS 5 inferred from the pollen stratigraphy in a sediment core from Lake Ladoga

Andreev

Shumilovskikh

Savelieva

et al. 2019

Boreas

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“…Pyxidinopsis psilata and Spiniferites cruciformis are often considered as living in salinities ≤7 psμ (Dale, 1996). However, they have been found at higher salinities up to 18 psμ in some sites, but the cysts are present in low percentages only (Mudie et al, 2017). Spiniferites belerius seems to occur more frequently in waters with fluctuating salinities (Mudie et al, 2017).…”

Section: The Taxa and Their Ecological Requirementsmentioning

confidence: 90%

“…The CS is clearly less diverse in dinoflagellate species than the Black Sea (Mudie et al, 2017). Moreover, fewer cysts are known than motile forms (Lewis et al, 2018).…”

Section: The Taxa and Their Ecological Requirementsmentioning

confidence: 99%

“…The salinities in which Impagidinium caspienense lives are poorly known, as it is a new species apparently endemic to the CS, Aral Sea and Karabogaz-Gol with rare occurrences in the Black Sea (Mudie et al, 2017). Marret et al (2004) have shown that it is very abundant in surface sediment samples of the CS with surface water salinities of 13 psμ.…”

Section: The Taxa and Their Ecological Requirementsmentioning

confidence: 99%

“…In this paper, we evaluate the palaeoenvironmental potential of organic-walled dinoflagellates, unicellular phytoplankton organisms that form cysts that may be preserved in sediments and are called dinocysts. A recent major compilation of surface samples in the Pontocaspian region has shown that dinocyst assemblages are sensitive to salinity changes, amongst other parameters, and may provide invaluable qualitative information to detect the flow of water masses, as well as water-level fluctuations at millennial, centennial and, even, decadal scales (Mudie et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Dinocyst records from deep cores reveal a reversed salinity gradient in the Caspian Sea at 8.5–4.0 cal ka BP

Leroy

Merino

Kozina

2019

Quaternary Science Reviews

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Highlights Dinocysts grouped by salinity, providing long-term water level/flow reconstructions. Dinocysts show a higher highstand after the Mangyshlak lowstand than previously seen. A South to North water flow gradient at 8.5-4 cal ka BP, reversed from the current one. Water level influenced by precipitation over Karakum and perhaps indirectly monsoon. A major turnover in dinocyst assemblages in all three sequences at c. 4 cal. ka BP. AbstractUnderstanding the long-term environmental forcings driving Caspian Sea (CS) water levels is of utmost importance, not only owing to its large size, or to the surrounding developing economies but also to improve global climate models and forecasts. However, Late Quaternary CS level changes and their amplitude are mostly documented from incomplete coastal sediment records. Because of the CS idiosyncrasies, that behaves neither as a sea nor as a lake, the methods used to reconstruct water levels in the global ocean or in freshwater lakes do not always apply.Here, we propose a first step toward the use of dinoflagellate cysts records to reconstruct qualitative changes in water mass, focusing on new and published deepwater sedimentary sequences from the south and middle CS basins. Trends in water level changes are reconstructed on the relative proportions of dinocyst assemblages with different levels of brackishness.2 A higher highstand than previously seen is reconstructed post-Mangyshlak lowstand. A reverse water flow gradient from S to N, not previously detected, is identified at 8.5-8 to 4 cal ka BP. A major turnover in dinocyst assemblage is found at 4 cal ka BP. While the Volga River is the main source of water nowadays, we propose that the source of water to maintain the 8.5-8 to 4 cal ka BP highstand is the now-disconnected drainage basin of the Amu-Darya. The CS was at that time most likely strongly influenced by low latitude climates, with more precipitation over the Karakum and, perhaps, even indirect monsoonal influence.

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Past and Current Changes in the Largest Lake of the World: The Caspian Sea

Leroy

Lahijani

Crétaux

et al. 2020

Large Asian Lakes in a Changing World

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Atlas of modern dinoflagellate cyst distributions in the Black Sea Corridor: from Aegean to Aral Seas, including Marmara, Black, Azov and Caspian Seas

Cited by 78 publications

References 291 publications

Environmental conditions in northwestern Russia during MIS 5 inferred from the pollen stratigraphy in a sediment core from Lake Ladoga

Environmental conditions in northwestern Russia during MIS 5 inferred from the pollen stratigraphy in a sediment core from Lake Ladoga

Dinocyst records from deep cores reveal a reversed salinity gradient in the Caspian Sea at 8.5–4.0 cal ka BP

Past and Current Changes in the Largest Lake of the World: The Caspian Sea

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Atlas of modern dinoflagellate cyst distributions in the Black Sea Corridor: from Aegean to Aral Seas, including Marmara, Black, Azov and Caspian Seas

Cited by 78 publications

References 291 publications

Environmental conditions in northwestern Russia during MIS 5 inferred from the pollen stratigraphy in a sediment core from Lake Ladoga

Environmental conditions in northwestern Russia during MIS 5 inferred from the pollen stratigraphy in a sediment core from Lake Ladoga

Dinocyst records from deep cores reveal a reversed salinity gradient in the Caspian Sea at 8.5–4.0 cal ka BP

Past and Current Changes in the Largest Lake of the World: The Caspian Sea

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Dinocyst records from deep cores reveal a reversed salinity gradient in the Caspian Sea at 8.5–4.0 cal ka BP