ANALISIS OF PHITODIVERSITY ACCORDING TO THE STATE OF VEGETATION PF THE PETROPAVLOVSK ESTUARY LANSCAPE RESERVE AND ITS SURROUNDINGS

Abstract

The Petropavlovsk estuary landscape reserve and its surroundings are subject to significant anthropogenic influence as a result of human activity. That is why the analysis of phytodiversity is important in order to get an idea of the level of transformation of the territory of the reserve. In the course of the work, an ecomorphological analysis of flora was carried out and anthropogenic influence on phytocenoses was revealed. A list of plants with bio-ecological certification, which were discovered during research, was compiled. Three points were chosen for research. During the work, 16 descriptions were made at these points, with different projective cover by vegetation twice during the growing season. The flora is characterized by a small variety of species – 94 higher vascular plants belonging to 33 families. Astracaea, Poacaea, and Rosacaea are among the main families with the greatest abundance of species. Hemicryptophytes predominate among climate morphs, and species that are partially light-demanding among ecomorphs. Biomorphs are characterized by the dominance of polycarps (perennial plants). Hygromesophyte and xerophyte species predominate in the hygrospectrum of the flora. . Species with medium moisture conditions make up 16%. The share of xerophytes in conditions of moderate moisture is 7%. Species that show wide tolerance to moisture conditions make up 2%. Among trophomorphs, mesotrophic species completely dominate. The coenomorphic structure is mainly represented by typical types of bows. In all descriptions there is a ruderal fraction, as well as species that partially or facultatively belong to this group. Due to the obvious anthropogenic influence (fouling which is a consequence of recreational and economic activities plowing, livestock grazing, there are signs of technogenic load), plant associations are poorly developed. The total fraction of adventitious species is 29%, of which 14% of species form a stable fraction in the investigated phytocenoses. There are two species, that are considered to be quarantined. Tree and shrub vegetation is very poorly developed and makes up less than 5% of the entire flora and is in a state of degression. The research area needs further observations of the state of transformational changes in vegetation that are occurring at this stage.