1067-4136/01/3201- $25.00 © 2001
Russian Journal of Ecology, Vol. 32, No. 1, 2001, pp. 17–21. Translated from Ekologiya, No. 1, 2001, pp. 20–24.
Original Russian Text Copyright © 2001 by Boikov, Kharitonov, Buinova, Badmaeva.
The speciﬁc environmental conditions of Trans-
baikalia provided for the unique species diversity of
plants in this region. This mountain area, which
includes Lake Baikal, is characterized by original veg-
etation with a relatively high level of endemism. The
ﬂora of Transbaikalia requires comprehensive analysis
and conservation as it has great economic signiﬁcance
and is of great scientiﬁc importance for understanding
the genesis of plant cover.
The development of measures to protect rare plant
species is based on the detailed study of their speciﬁc
ecological and biological features and of the processes
and phenomena associated with their life and growth.
This paper deals with the results of such a study on
, an endangered species included in the
Red Data Book of the Buryat Republic (
MATERIALS AND METHODS
The endangered species
, its cenopo-
pulations, and the plant communities containing it were
studied. Geobotanical analysis (Mirkin
was carried out in order to assess the conditions in
ecotopes, the structure and species composition of phy-
tocenoses in which
and the positions of the corresponding communities in
the successional and ecological series. Parameters of
cenopopulations (size, density, ways of
reproduction, etc.) were studied in detail by conven-
tional methods (
Programma i metodika…
, 1986); bio-
logical productivity per unit area and seed productivity
were determined according to Rabotnov (1960) and
Vainagii (1973), respectively.
Speciﬁc structural and functional features of leaves
were studied at the ﬂowering phase. Leaf samples were
ﬁxed in Hammalund’s solution and stored in 70% ethyl
alcohol. To study the leaf structure, the central part of
the leaf plate was cut off. Attention was focused on the
most labile characters, such as the structure of the mes-
ophyll and epidermis.
The anatomy of leaf plates was studied by the con-
ventional method in ﬁxed samples. Sections were
stained with acid fuchsin. The cell number and size
were determined under a light microscope as described
by Godnev and Lipskaya (1965). Drawings of the leaf
structure were made using an RA-4 drawing device.
Statistical analysis was performed according to Zaitsev
(1984).The transpiration rate was determined according
(1950), and the water content in the
plants was measured gravimetrically. The works of Sere-
bryakov (1952, 1962) and Serebryakova (1962, 1971)
were used as a methodological basis for biomorphologi-
RESULTS AND DISCUSSION
grows only in Transbaikalia,
near the village of Ust’-Ilya (Chita oblast) and in sev-
eral areas of the Buryat Republic (Fig. 1): on the slopes
of the Borgoiskii Ridge descending to the Dzhida River
near the village of Dyrestyi and near the villages of
Armak, Naryn, Mikhailovka (Mount Mansun), Kharat-
sai (Lavrenko, 1934;
Flora Tsentral’noi Sibiri
and Gachit (Peshkova, 1972,
In addition, this species occurs in Mongolia and China.
The described type specimens are from Transbaikalia.
is a representative of the steppe ﬂora.
It grows mainly in dry habitats on stony slopes of cone-
shaped hills and on poor sandy loams, where competi-
tion is absent and the plant cover is being formed.
is a perennial herbaceous loose-bunch grass
Ecological and Biological Features of Melic
Turch. ex Trin.) in Transbaikalia
T. G. Boikov, Yu. D. Kharitonov, M. G. Buinova, and N. K. Badmaeva
Institute of General and Experimental Biology, Siberian Division, Russian Academy of Sciences, ul Sakh’yanovoi 6,
Ulan-Ude, 670047 Russia
Received October 26, 1999
—The endangered species
was studied with respect to geographic distribution, the
recent state of cenopopulations, the characteristics of habitats, phytocenotic relationships, morphology, and
speciﬁc ecological and physiological features. The data on the introduction, biochemical composition, and eco-
nomic signiﬁcance of
are presented, and measures aimed at species conservation are proposed.
: ecology, biology, morphology, cenopopulations, speciﬁc features, abundance, conservation.