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Cenozoic evolution of the steppe-desert biome in Central Asia

N. Barbolini 1, * A. Woutersen 1, * Guillaume Dupont-Nivet 2, 3, 4 D. Silvestro D. Tardif 5 P. Coster N. Meijer C. Chang H.-X. Zhang A. Licht C. Rydin A. Koutsodendris F. Han A. Rohrmann X.-J. Liu Y. Zhang Y. Donnadieu 6, 7, 8 F. Fluteau 5 J.-B. Ladant G. Le Hir 5 C. Hoorn *
* Corresponding author
1 UvA - University of Amsterdam [Amsterdam]
2 Universität Potsdam
3 GR - Géosciences Rennes
4 Key Laboratory of Orogenic Belts and Crustal Evolution
5 IPGP - Institut de Physique du Globe de Paris
6 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
7 CLIM - Modélisation du climat
LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] : DRF/LSCE
8 CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement
Abstract : The origins and development of the arid and highly seasonal steppe-desert biome in Central Asia, the largest of its kind in the world, remain largely unconstrained by existing records. It is unclear how Cenozoic climatic, geological, and biological forces, acting at diverse spatial and temporal scales, shaped Central Asian ecosystems through time. Our synthesis shows that the Central Asian steppe-desert has existed since at least Eocene times but experienced no less than two regime shifts, one at the Eocene–Oligocene Transition and one in the mid-Miocene. These shifts separated three successive “stable states,” each characterized by unique floral and faunal structures. Past responses to disturbance in the Asian steppe-desert imply that modern ecosystems are unlikely to recover their present structures and diversity if forced into a new regime. This is of concern for Asian steppes today, which are being modified for human use and lost to desertification at unprecedented rates.
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N. Barbolini, A. Woutersen, Guillaume Dupont-Nivet, D. Silvestro, D. Tardif, et al.. Cenozoic evolution of the steppe-desert biome in Central Asia. Science Advances , American Association for the Advancement of Science (AAAS), 2020, 6 (41), pp.eabb8227. ⟨10.1126/sciadv.abb8227⟩. ⟨insu-02965777⟩

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