Author:
Abakumov Evgeny,Lupachev Alexey,Yaneva Rositsa,Zhiyanski Miglena
Abstract
Cryosols of the Antarctic maritime area are much different from the continental ones. The relatively moderate climate conditions in Maritime Antarctica and a strong interaction between the biotic and abiotic environment are drivers for more intensive soil formation processes than in the continental regions. Soil formation studies from the Maritime Antarctica are, however, rather rare. Therefore, micromorphological investigations on polar soils can contribute to more comprehensive information on soil genesis in Antarctica. In this study, we applied the micromorphological study of thin sections from soil micromonoliths to assess the intensity and trends of the pedogenic processes in selected soils from two adjacent islands of the South-Shetland archipelago: King George Island and Livingston Island. The results obtained show that regional lithology and the origin of the incoming organic matter mainly determine the micromorphological structure of the local soils. Soil matrix micromorphological properties and features (mineralogical content, weathering stage and even partly grain-size distribution) are mainly defined by pyroclastic particles due to recent and ancient volcanic eruptions. The presence of rounded grains and aggregated mineral particles is the evidence of marine origin of the sediments. Ornithogenic soils show the clear evidence of the organic plasma formation and mineral particles aggregation via the zoogenic organic substances provided by penguins which is a unique specifics of the maritime Antarctic soils.
Subject
General Earth and Planetary Sciences,General Agricultural and Biological Sciences,General Environmental Science
Reference38 articles.
1. Abakumov, E. V. (2010): Particle-size distribution in soils of West Antarctica. Eurasian Soil Science, 43(3): 297-304. https://doi.org/10.1134/S1064229310030075
2. Abakumov, E. V. (2011): Soils of Western Antarctic. St. Petersburg, Russia. 112 p.
3. Abakumov, E. V. (2014): Micromorphological features of ornitogenic soil formation in Antarctica. Russian Ornithological Journal, 23(1030): 2353-2357.
4. Abakumov, E. V., Gagarina, E. I., Sapega, V. F. and Vlasov, D.Y. (2013): Micromorphological features of the fine earth and skeletal fractions of soils of West Antarctica in the areas of Russian Antarctic stations. Eurasian Soil Science, 46(12): 1219-1229. https://doi.org/10.1134/S1064229313120028
5. Beyer, L., Pingpank, K., Wriedt, G. and Bölter, M. (2000): Soil formation in coastal continental Antarctica (Wilkes Land). Geoderma, 95(3-4): 283-304. https://doi.org/10.1016/S0016-7061(99)00095-6