The influence of hydrothermal fluctuations on the stability of the phytoproduction process of forest landscapes of the Tukuringra Ridge
F.K. KIRYANOV-GREF, A.V. KHOROSHEV, S.V. DUDOV
Lomonosov Moscow State University, Moscow, Russia
Keywords: variability, dendrochronology, influence, productivity, hydrothermal parameters
Abstract
The resilience of forest ecosystems to natural and anthropogenic impacts was studied. The influence of climatic, biological, landscape, and anthropogenic factors on the productivity of forests in the Zeysky Nature Reserve was assessed. Climate trends and the sensitivity of the phytoproduction process to changes were analyzed, and a periodization of hydrothermal parameters was provided. The research methods included collecting tree cores to estimate annual increments and analyzing climate data using statistical methods. Based on the analysis of tree-ring chronologies, the relationship between climatic fluctuations and radial tree increment was retrospectively assessed. To improve the accuracy of the analysis, methods of cross-dating and standardization of tree-ring series were used. The resulting time series of tree increment were compared with the data on air temperature and precipitation provided by the nearest weather station. Correlation and regression analyses were used to assess the statistical significance of the identified relationships between climatic factors and tree increment. Specifically, the Pearson correlation coefficients were calculated between tree increment and average monthly temperature and precipitation values for different periods of the growing season. The results of the regression analysis made it possible to assess the contribution of each climatic factor to the overall variability of tree increment. It has been established that temperature conditions, especially in spring and summer, significantly affect tree increment, while precipitation plays a secondary role. At this stage of research, it was not possible to identify a clear influence of climatic factors on forest productivity in the long or short term. Despite the correlations identified, it is necessary to consider the influence of other factors, such as competition between trees, stand age, soil conditions, and the impact of pests and diseases, which may mask or enhance the influence of climatic factors.
|
