Open AccessState of Cenopopulations of Trommsdorffia ciliata (Thunb.) H.S. Pak (Asteraceae) in the Plant Communities of the Lower Reaches of the Ussuri River
Author(s) -
Т.Н. Моторыкина
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/895/1/012031
Subject(s) - ciliata , biology , herbaceous plant , botany , population , horticulture , ecology , protozoa , demography , sociology
The paper presents the results of studying the structure and state of four cenopopulations of the rare species Trommsdorffia ciliata (Thunb.) H.S. Pak in the valley of the lower reaches of the Ussuri River. The density of the studied cenopopulations is from 8 to 27 ind./m 2 . All studied cenopopulations are normal and incomplete. The absence or small number of juveniles in the ontogenetic spectrum of the studied cenopopulations is associated with a high projective cover of the herbaceous layer, which prevents the survival of this age group. According to the absolute maximum of ontogenetic groups of adult plants of all cenopopulations, Trommsdorffia ciliata are classified as young normal ones, where the maximum falls on individuals of the virginal state. An evaluation of population and organismic signs of the state of the studied cenopopulations showed that the most favorable conditions for the growth of Trommsdorffia ciliata are formed in a moist sedge-grass-herb meadow in the vicinity of Lonchakovo village. The measures for the protection of Trommsdorffia ciliata that are to include in the Red Book of the Khabarovsk krai (2019), to inhabit in a protected area and are to control the state of the known population of this species have been cited.