UDC 630*561.24;528.854

Rygalova N.V., Plutalova T.G., Martynova Y.V. ASSESSMENT OF PRODUCTIVITY INDICATORS OF PLANT COMMUNITIES OF THE STEPPE ZONE IN WESTERN SIBERIA OBTAINED BY REMOTE SENSING AND DENDROCHRONOLOGY // Arid Ecosystems. 2024. Vol. 30. № 2 (99). P. 36-44. | PDF

The study explores different methods of combined analysis of the productivity of herbaceous and woody plants from various landscape communities, such as typical steppe, saline, woody and agricultural ones, in the arid conditions in the south of Western Siberia. The analysis was carried out remotely (by analyzing NDVI) and dendrochronologically (by analyzing width growth of the Scots pine (Punus sylvestris L.) trunks in the extrazonal ribbon forests). We discovered that climatic factors that determine the dynamics of NDVI and radial growth of trees in the steppe zone are the limiting influence of summer air temperatures and the positive influence of precipitation during the previous winter and current summer seasons. Analysis of vegetation indices and radial growth showed the presence of a moderate relationship between them: NDVI of herbaceous communities (feather grass-fescue, arable lands) in May and July correlated with the width of growth rings. It was revealed that in the arid steppe the trunk width of pines’ radial growth depends on the NDVI value of their crowns in May two years earlier.

Keywords: NDVI, productivity, radial growth of trees, ribbon pine forest, steppe zone, south of
Western Siberia.

Funding. The research was carried out with the support of the Ministry of Science and Higher
Education of the Russian Federation, the state assignment for scientific research carried out at
Altai State University, project no. FZMW-2023-0007.

DOI: 10.24412/1993-3916-2024-2-36-44
EDN: PGYINH