Journal of Siberian Federal University. Biology / Aboveground and Belowground Phytomass of Meadow Communities of the Middle Ob Floodplain (the Krivosheinsky District of the Tomsk Region)

Full text (.pdf)
Issue
Journal of Siberian Federal University. Biology. 2023 16 (4)
Authors
Shepeleva, Ludmila F.; Pudova, Marina S.; Ledeneva, Essenia A.; Kolesnichenko, Larisa G.
Contact information
Shepeleva, Ludmila F. : National Research Tomsk State University Tomsk, Russian Federation; ; ORCID: 0000-0002-8805-469X; Pudova, Marina S.: National Research Tomsk State University Tomsk, Russian Federation; Ledeneva, Essenia A.: National Research Tomsk State University Tomsk, Russian Federation; Kolesnichenko, Larisa G. : National Research Tomsk State University Tomsk, Russian Federation; ORCID: 0000-0001-9797-8985
Keywords
meadow plant communities; floodplain of the Ob River; Western Siberia; aboveground biomass; belowground biomass
Abstract

Grassland communities make an important contribution to the carbon cycle. Although much research effort has been recently devoted to carbon emission by vegetation, works studying floodplain territories are rare. The purpose of this work was to study the structure of plant matter and the production of root systems in order to assess the biological cycle of meadow ecosystems in the floodplain of the middle Ob River. The production of aboveground and belowground living phytomass and mortmass was determined on permanent study sites in three meadow plant communities in the floodplain of the Ob River (Kaibasovo section of the Tomsk Carbon Test Site) in 2019 and 2021. Grass, forb, and sedge communities growing under different flooding conditions were studied. In the phase of the maximum development of the grass stand (July), geobotanical description and sampling of the herbage, litter, and dead grass from areas of 0.25 m2 were carried out in four replicates. Soil monoliths, 10 cm3 each, were sampled in the center of the study plots in layers to a depth of 20 cm. The second belowground phytomass sampling period was in mid-August. The monoliths were processed using A. A. Titlyanova’s method. Data analysis was performed by methods of nonparametric statistics. The study showed that in the phase of maximum development of the grass stand, the reserves of living phytomass in the aboveground part ranged from 223 to 593 g/m2, and in the belowground part in the soil layer of 0–20 cm, the total reserves of root material varied from plot to plot within 843–4048 g/m2. In all communities, the amount of the belowground phytomass was higher in July than in August, but the extent to which the root phytomass decreased differed across the communities because of the different rates of death and mineralization of roots at high and low locations. The year-to-year variation in the productivity and parameters of the plant matter of the meadows was caused by differences in weather conditions, flooding levels, and the composition of meadow communities

Pages
454–470
EDN
QIXPYE
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/152404

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