Chapter 4: &lt;italic&gt;West Siberia&lt;/italic&gt;

Arkhipov, S.A.; Volkova, V. S.; Zolnikov, I. D.; Zykina, V.S.; Krukover, A A; Kul'kova, L.A.

doi:10.1130/0-8137-2382-5.67

Cited by 22 publications

(38 citation statements)

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“…In contrast to already known climate development suggested by Arkhipov et al (2005), our data point to a strong humidity fluctuations within in the late Middle Miocene (late Serravallian), between MAP values of 282, 884 and 1.096 mm (Fig. 10).…”

Section: Late Serravalliancontrasting

confidence: 99%

“…The value shows significantly more humid than Tortonian-Messinian boundary and late Messinian (see below). Our data are contrary to the palynologic results, which however give lower estimates (400-450 mm; Arkhipov et al 2005).…”

Section: Novastanitsa Svitacontrasting

confidence: 99%

“…10). The only botanical data of this time (Bescheul macroflora) point to a warm-temperate and humid (MAP ~700 mm) climate (Arkhipov et al, 2005), which best compare to our Malyi Kalkaman 2 results (MAP 884 mm).…”

Section: Late Serravalliansupporting

confidence: 66%

“…For a better palaeoclimatic understanding we estimate palaeoprecipitation values for 12 data point -those localities, which provide six and more amphibian and reptile taxa, applicable for the bioclimatic analysis (Böhme et al, 2006 (Suppl. 1, Fig, 10) than estimated using palynological data (Arkhipov et al, 2005). Apart from the fluctuating character of humidity, in general mean annual precipitation (MAP) is significantly above the present day values (reaching 550 % of the present-day values).…”

Section: Palaeoclimatic Implicationsmentioning

confidence: 85%

“…For the Aquatanian age locality Ayakoz we estimated a MAP value of 945 mm, representing more then three times higher rainfall in comparison to the recent. Arkhipo et al (Arkhipov et al, 2005) using the palinologic data estimated for the Abrosimov Svita (Aquitanian age) in Western Siberia humid climate with MAP 800 mm. Beside this, Bruch and Zhilin (Bruch & Zhilin, 2007) based on macroflora data, estimated for about of 30 Aquitanian age localities distributed from Western to Eastern Kazakhstan, similar to our result, precipitation value of 935-1232 mm.…”

Section: Aquitanianmentioning

confidence: 99%

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Supplemental Information 3: List of Localities With Amphibian and Reptiles Faunas According to the Literature Data, Accompanied

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Background. Now-a-day territory of Western Siberia has the poorest diversity of amphibians and reptiles within the Palaearctic Realm, influenced by unfavourable climate. Less is known about the origian and emergence of it. Aside from better-explored European Neogene records of amphibians and reptiles, the Neogene herpetofauna of Western Asia is understudied. The few available studies on amphibian and reptile fossil assemblages need critical reviews and new interpretations considering the latest knowledge of the European record. The comparison with European record will provide data on palaeobiogeographic affiliations of the region as well as origin and emergence of the now-a-day fauna of Western Siberia. Beside these, a study providing overview about the earliest occurences of certain amphibian linages, that can be used for the calibration of the molecular clocks, is missing. Methods and Results. The amphibian and reptile fauna from over 40 Western Siberian, Russia and Northeastern Kazakhian localities ranging from Middle Miocene to Early Pleistocene has been studied. In the study the published data has been considered and critically reviewed and newly interpreted. More then 50 amphibian and reptile taxa has been identified belonging to families Hynobiidae, Cryptobranchidae, Salamandridae, Palaeobatrachidae, Bombinatoridae, Pelobatidae, Hylidae, Bufonidae, Ranidae, Gekkonidae, Lacertidae and Emydidae. Palaeobiogeographic analysis for those group has been done. For 12 localities, palaeoprecipitation values have been estimated using the bioclimatic analysis of herpetofaunal assemblage. Conclusions. The Neogene assemblage of Westren Sibera is dominated by groups (Palaeobatrachidae, Bombina, Hyla, Bufo bufo) with European affinities. A small part of assemblage includes Eastern Palaearctic taxa (e.g. Hynobiidae, Tylototriton, Bufotes viridis, R. arvalis). For several taxa (e.g. Mioproteus, Hyla, Bombina) the Western Siberian records of represent the most east Eurasian records of these groups. The most divers faunas are found in the Middle Miocene, whereas the poorest towards Early Pleistocene. This tendency could be referred to the progressive global cooling of the climate in Northern Hemisphere. Our results showed higher-amplitude changes of precipitation development in Western Siberia from Early Miocene to Pliocene, than earlier assumed.

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Section: Late Serravalliancontrasting

confidence: 99%

Section: Novastanitsa Svitacontrasting

confidence: 99%

Section: Late Serravalliansupporting

confidence: 66%

Section: Palaeoclimatic Implicationsmentioning

confidence: 85%

Section: Aquitanianmentioning

confidence: 99%

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Supplemental Information 3: List of Localities With Amphibian and Reptiles Faunas According to the Literature Data, Accompanied

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New Fagaceous pollen taxa from the Miocene Søby flora of Denmark and their biogeographic implications

Denk

Bouchal

2021

American J of Botany

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The Fagaceae comprise around 1000 tree species in the Northern Hemisphere. Despite an extensive fossil pollen record, reconstructing biogeographic patterns is hampered because it is difficult to achieve good taxonomic resolution with light microscopy alone. We investigate dispersed pollen of Fagaceae from the Miocene Søby flora, Denmark. We explore the latitudinal gradient in Fagaceae distribution during the Miocene Climatic Optimum (MCO) in Europe and the Northern Hemisphere to compare it with the Eocene Warmhouse and the present. Methods: We investigated dispersed pollen using light and scanning electron microscopy. We assessed biogeographic patterns in Fagaceae during two warm periods in Earth history (MCO, Eocene) and the present. Results: Eight species of Fagaceae were recognized in the Søby flora. Of these, Fagus had a continuous Mediterranean to subarctic distribution during MCO; Quercus sect. Cerris and castaneoids had northern limits in Denmark, and evergreen Quercus sect. Ilex in Central Europe. In a northern hemispheric context, Fagus and sections of Quercus had more northerly distribution limits during Eocene and MCO with maximum northward extensions during Eocene (Fagus, castaneoids) or Oligo-Miocene (Quercus sects. Cerris and Ilex). The known distribution of the extinct Tricolporopollenites theacoides during MCO included Central Europe and East China, while this taxon thrived in South China during Eocene. Conclusions: More northerly distributions during MCO and Eocene probably were determined by temperature. In contrast, fossil occurrences in areas that are arid or semi-humid today were determined by maritime conditions in these areas (western North America, Central Asia) during the Cenozoic.

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Pleistocene dynamics of the Eurasian steppe as a driving force of evolution: Phylogenetic history of the genus Capsella (Brassicaceae)

Čalasan

Hurka

German

et al. 2021

Ecology and Evolution

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Capsella is a model plant genus of the Brassicaceae closely related to Arabidopsis. To disentangle its biogeographical history and intrageneric phylogenetic relationships, 282 individuals of all five currently recognized Capsella species were genotyped using a restriction digest‐based next‐generation sequencing method. Our analysis retrieved two main lineages within Capsella that split c. one million years ago, with western C. grandiflora and C. rubella forming a sister lineage to the eastern lineage consisting of C. orientalis. The split was attributed to continuous latitudinal displacements of the Eurasian steppe belt to the south during Early Pleistocene glacial cycles. During the interglacial cycles of the Late Pleistocene, hybridization of the two lineages took place in the southwestern East European Plain, leading to the allotetraploid C. bursa‐pastoris. Extant genetic variation within C. orientalis postdated any extensive glacial events. Ecological niche modeling showed that suitable habitat for C. orientalis existed during the Last Glacial Maximum around the north coast of the Black Sea and in southern Kazakhstan. Such a scenario is also supported by population genomic data that uncovered the highest genetic diversity in the south Kazakhstan cluster, suggesting that C. orientalis originated in continental Asia and migrated north‐ and possibly eastwards after the last ice age. Post‐glacial hybridization events between C. bursa‐pastoris and C. grandiflora/rubella in the southwestern East European Plain and the Mediterranean gave rise to C. thracica. Introgression of C. grandiflora/rubella into C. bursa‐pastoris resulted in a new Mediterranean cluster within the already existing Eurasian C. bursa‐pastoris cluster. This study shows that the continuous displacement and disruption of the Eurasian steppe belt during the Pleistocene was the driving force in the evolution of Capsella.

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Chapter 4: <italic>West Siberia</italic>

Cited by 22 publications

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New Fagaceous pollen taxa from the Miocene Søby flora of Denmark and their biogeographic implications

Pleistocene dynamics of the Eurasian steppe as a driving force of evolution: Phylogenetic history of the genus Capsella (Brassicaceae)

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