Zaysan-the Only Surviving Cretaceous Lake-May be Lost

Dorfman, Benjamin F.

doi:10.1016/j.proenv.2011.09.220

Cited by 4 publications

(4 citation statements)

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“…During the Miocene, large depressions in the hilly zone of the present-day Altai and northern Tien Shan were formed, and an inland lake has been proved for the Zaysan Depression [ 49 ]. It is suggested that a paleolake existed here since the Cretaceous period and that the Zaysan Basin was never dried [ 51 ].…”

Section: Discussionmentioning

confidence: 99%

Allium pallasii and A. caricifolium—Surprisingly Diverse Old Steppe Species, Showing a Clear Geographical Barrier in the Area of Lake Zaysan

Friesen

Grützmacher

Skaptsov

et al. 2022

Plants

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Polymorph Allium pallasii s.l. from monotypic A. sect. Pallasia was studied using a wide spectrum of methods and divided into two clearly morphologically, geographically, cytologically and genetically isolated species: A. pallasii s. str.—North-East Kazakhstan, Western Siberia, and the Altai Mountains; A. caricifolium—Kyrgyzstan, Northwest China, South-East Kazakhstan until Zaysan Lake in the east. Despite serious genetic differences, both species are sisters and are related to species of the A. sect. Codonoprasum (Subg. Allium). Allium caricifolium differs from A. pallasii s. str. by taller stems, dense inflorescence, and with filaments longer than perianth. The possible phylogenetic reasons for the separation of these species are discussed. A nomenclature analysis of synonyms was carried out.

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Section: Discussionmentioning

confidence: 99%

Allium pallasii and A. caricifolium—Surprisingly Diverse Old Steppe Species, Showing a Clear Geographical Barrier in the Area of Lake Zaysan

Friesen

Grützmacher

Skaptsov

et al. 2022

Plants

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“…Lake Zaysan has existed for a long time and therefore has seen many climatic and environmental changes (Borisov, 1963; Lucas et al, 2000; Dorfman, 2011). Being a lacustrine ecosystem, species richness and diversity of local communities have been largely affected by such factors as temperature regime, pH, nutrient availability, habitat complexity, speciation rates, competition, and predation (Brönmark and Hansson, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…In the lowest part of the Zaysan Basin lies the eponymous lake, which is now one of the largest freshwater lakes of Central Asia (134 km long and about 31 km wide). Lake Zaysan is also regarded as one of the oldest surviving lakes on Earth because it is thought to have never dried since the Late Cretaceous (Lucas et al, 2000; Dorfman, 2011). The Zaysan Basin lies on a Paleozoic basement and is filled with Cretaceous, Paleogene, Neogene, and Quaternary continental deposits, the total thickness of which reaches more than 1700m (Vasilenko, 1961; Borisov, 1963).…”

Section: Introductionmentioning

confidence: 99%

New data on the Miocene vertebrate assemblage of the Zaysan Basin (Central Asia) with implications for biostratigraphy, paleoecology, and paleobiogeography

Kovalchuk

Divay

Barkaszi

et al. 2022

Journal of Vertebrate Paleontology

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The Zaysan Basin in Central Asia has a long geological history, and it has therefore seen major climatic and evolutionary transformations. The Miocene fossil record of this locality is remarkably rich representing all groups of vertebrates. A revision of fish remains has been carried out and new records of fishes, reptiles, and mammals recovered from Miocene deposits of the Zaysan Basin have been described. The study of fossils has revealed the existence of a quite diverse vertebrate assemblage in the basin during the Miocene. Representatives of the Percidae and Amiinae, and the species †Leobergia zaissanica predominated among fishes, whereas reptiles were supposedly represented in the assemblage by pan-trionychid turtles and crocodiles. No amphibians have been revealed, while the only mammalian taxa in the studied sample is a fossorial rodent of the genus †Tachyoryctoides. In contrast to previous views regarding the Middle Miocene age of the Zaysan Formation, the analysis of fish and mammal remains recovered from this locality strongly suggests an Early Miocene age. Findings of bowfin remains in the Zaysan Basin confirm that this group had existed outside of North America beyond the Paleogene/Neogene transition, and, at the same time, these specimens are the last known occurrences of the taxa Amiidae, Amiiformes, and Halecomorphi outside of North America. Data also indicate the existence of a lacustrine ecosystem in the Zaysan Basin during the Miocene with a taxonomically rich vertebrate assemblage and diverse trophic relations being an important center of biodiversity in the Miocene of Central Asia.

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“…Numerous previous studies have reported an alarming decrease in lake levels from the mid-to late 20th century. The growing water use demand during this century was charged as being responsible for the continuous drying of Lake Issyk-Kul [70,71], Lake Balkhash [72], Lake Zaysan [73], and Lake Sarykamysh [74]. These lakes were threatening to share the fate of the infamous Aral Sea, which had desiccated to 10% of its volume within 40 years between 1960 and 2000 [69,70].…”

Section: Discussionmentioning

confidence: 99%

Changing Pattern of Water Level Trends in Eurasian Endorheic Lakes as a Response to the Recent Climate Variability

2021

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Lake level is a sensitive integral indicator of climate change on regional scales, especially in enclosed endorheic basins. Eurasia contains the largest endorheic zone with several large terminal lakes, whose water levels recently underwent remarkable variations. To address the patterns of these variations and their links to the climate change, we investigated the variability of levels in 15 lakes of three neighboring endorheic regions—Central Asia, Tibetan Plateau, and Mongolian Plateau. Satellite altimetry revealed a heterogeneous pattern among the regions during 1992–2018: lake levels increased significantly in Central Asia and the Tibetan Plateau but decreased on the Mongolian Plateau. The shifts to the increasing trend were detected since 1997 in Central Asia, since 1998 in the southern part of the Tibetan Plateau, and since 2005 in its northern part. The shift in air temperatures around 1997 and the precipitation shifts around 1998 and 2004 contributed to the trend’s turning points, with precipitation being the major contributor to the heterogeneous pattern of lake levels. Our findings reveal the linkage of the heterogeneous pattern of lake levels to climatic factors in the endorheic basins, providing a further understanding of the hydrological regime in the Eurasian endorheic zone and its sensitivity to climate change.

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Zaysan-the Only Surviving Cretaceous Lake-May be Lost

Cited by 4 publications

References 4 publications

Allium pallasii and A. caricifolium—Surprisingly Diverse Old Steppe Species, Showing a Clear Geographical Barrier in the Area of Lake Zaysan

Allium pallasii and A. caricifolium—Surprisingly Diverse Old Steppe Species, Showing a Clear Geographical Barrier in the Area of Lake Zaysan

New data on the Miocene vertebrate assemblage of the Zaysan Basin (Central Asia) with implications for biostratigraphy, paleoecology, and paleobiogeography

Changing Pattern of Water Level Trends in Eurasian Endorheic Lakes as a Response to the Recent Climate Variability

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