К реконструкции палеоклимата по групповым палиноспектрам

Abstract

The method of determination of the main climatic and biotic indicators (species abundance, diversity and productivity of the vegetation) for the group of the spore – pollen spectra was developed for the Western Siberia conditions (mainly for the Tyumen and neighboring areas) Conventionally, the spore – pollen spectra are divided into three groups. The first group: the pollen of trees and shrubs, the second group: the shrubs and grass pollen, a third group: the spore. The groups reflect the equity participation in floristic complex of the upper, middle and lower tiers. It depends on the climate. From climate depends largely dominant D – a group with the highest weight. The impact of the other two groups is shown in total. The influence of each of the smaller groups in separate can be neglected. The theoretical basis of the method is the principle actualism. This principle implies an analogy form links between the vegetation composition and climate in the past and present. It allows to reduce the paleoclimatic reconstructions to establish links between the modern climate and surface palynological spectra.Elements of the climate and General vegetation composition of the spore – pollen spectra are presented equally, as a dimensionless dichotomy of the dominant and subdominant. The formula of communication of the majority dimensionless and dimensional climate characteristics are obtained. Established climatic and biotic depending retsentnyhh dominant pollen-spore spectra. Examples of changes dominant in depth and in time in the Holocene are. Calculated basic indicators of climate and biota for all natural zones of the Western Siberia.

Представлены результаты изучения связей между состав растительности и климатом в прошлом и в настоящее время.