Cyclic and linear trajectories of ecosystem evolution on sand dunes in Siberian taiga: A comprehensive analysis.

Autor: Soromotin AV; Tyumen State University, Tyumen, Russia. Electronic address: asoromotin@mail.ru., Lanza GR; Division of Environmental Sciences, State University of New York (SUNY) Syracuse, NY, USA., Sizov OS; Oil and Gas Research Institute, Russian Academy of Sciences, Moscow, Russia., Lobotrosova SA; Purgeokom LLC, Tyumen, Russia., Abakumov EV; St. Petersburg State University, Saint-Petersburg, Russia., Zverev AO; St. Petersburg State University, Saint-Petersburg, Russia., Yakimov AS; Earth Cryosphere Institute, Tyumen Scientific Centre, Russia., Konstantinov AO; Tyumen State University, Tyumen, Russia., Kurasova AO; Tyumen State University, Tyumen, Russia; Tomsk State University, Russia., Prihod'ko NV; Tyumen State University, Tyumen, Russia., Salavatulin VM; Tyumen State University, Tyumen, Russia., Varentsov MI; Lomonosov Moscow State University, Research Computing Center, Moscow, Russia., Alharbi SA; Dept. of Botany & Microbiology College of Science King Saud University, Riyadh, Saudi Arabia., Alotaibi KD; Department of Soil Science, College of Food and Agricultural Science, King Saud University, Riyadh, Saudi Arabia., Kuzyakov Y; Peoples Friendship University of Russia (RUDN University), 117198 Moscow, Russia; Department of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Göttingen, Göttingen, Germany.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Jun 10; Vol. 928, pp. 172265. Date of Electronic Publication: 2024 Apr 16.
DOI: 10.1016/j.scitotenv.2024.172265
Abstrakt: Extensive unforested sandy areas on the margins of floodplains and riverbeds, formed by dunes, barchans, and accumulation berms, are a ubiquitous feature across northern Eurasia and Alaska. These dynamic landscapes, which bear witness to the complex Holocene and modern climatic fluctuations, provide a unique opportunity to study ecosystem evolution. Within this heterogeneous assemblage, active dunes, characterized by their very sparse plant communities, contrast sharply with the surrounding taiga (boreal) forests common for the stabilized dunes. This juxtaposition makes these regions to natural laboratories to study vegetation succession and soil development. Through a comprehensive analysis of climate, geomorphology, vegetation, soil properties, and microbiome composition, we elucidate the intricacies of cyclic and linear ecosystem evolution within a representative sandy area located along the lower Nadym River in Siberia, approximately 100 km south of the Arctic Circle. The shift in the Holocene wind regime and the slow development of vegetation under harsh climatic conditions promoted cyclical ecosystem dynamics that precluded the attainment of a steady state. This cyclical trajectory is exemplified by Arenosols, characterized by extremely sparse vegetation and undifferentiated horizons. Conversely, accelerated vegetation growth within wind-protected enclaves on marginally stabilized soils facilitated sand stabilization and subsequent pedogenesis towards Podzols. Based on soil acidification due to litter input (mainly needles, lichens, and mosses) and the succession of microbial communities, we investigated constraints on carbon and nutrient availability during the initial stages of pedogenesis. In summary, the comprehensive study of initial ecosystem development on sand dunes within taiga forests has facilitated the elucidation of both common phases and spatiotemporal dynamics of vegetation and soil succession. This analysis has further clarified the existence of both cyclic and linear trajectories within the successional processes of ecosystem evolution.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Andrei V. Soromotin reports financial support was provided by the Tyumen Oblast Government project (89-DON1), Project CarboRus (075-15-2021-610).
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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