Methodological bases for studying the biological diversity of forest-forming species using dendrochronological methods
The biological diversity of European spruce ( Picea abies (L.) Karst.) and poplar tremor ( Populus tremula L.) natural populations using dendrochronology methods in the State Nature Regional Reserve «Molokchinsky botanico-entomological reserve (Moscow region)» was studied. The series of radial growth of aspen and spruce were analyzed. The investigated stand age is 70-80 years. The conjugated chronologies analysis of the growth index reactions made it possible to identify 4 groups of years in which this reactions qualitatively differed. Group 1. Aspen reduces growth, and spruce increases growth. Group 2. Aspen increases growth, and spruce reduces growth. Group 3. Aspen increases growth and spruce increases growth. Group 4. Aspen reduces growth and spruce reduces growth. For each group of years climograms were constructed. Qualitative differences in the two wood species growth reaction in different years are recorded. Different drought resistance and resistance to excessive moisture were revealed. Dendrochronological analysis made it possible to reveal differences in the stability of spruce and aspen to the extreme unfavorable abiotic factors impact. Populations polymorphism was studied, and groups of its existence were identified.