High Plant Species Distributed in and around Dengizkul, Bukhara Region

The article presents the results of research conducted 
in Dengizkul and around this area. It identifies plant species in and around 
the lake and analyzes species composition. As a result of the analysis, 70 
species of tall plants belonging to 24 families were identified in the lake. 
The identified species are divided into aquatic and riparian plants. Of these, 
18 species are found in lake water and 52 species in its vicinity. The low 
number of high plant species in the lake water is due to the salinity of the 
water. The protection of this area is based on the natural conservation of the 
surrounding plant population.


Introduction
There are more than 500 lakes in Uzbekistan and they are used wisely for various purposes [1]. A number of studies have been conducted on the hydrobiology of these lakes. However, not all lakes have been fully studied along the waterfront and aquatic plants. One such lake is Dengizkul Lake. Dengizkul is located in the south-west of the Republic of Uzbekistan, in the Alat district of Bukhara region, 75 km from the city of Bukhara, on the border with Turkmenistan, 40 km northwest of the center of Alat district ( Figure 1). Dengizkul physically and geographically occupies the depth part of the plains of Bukhara region. In the twentieth century, the Zarafshan River played an important role in the formation of the Dengizkul River. The lower tributary of the Zarafshan River, Tayqir, flows into the lake [2]. Currently, the main water source of the lake is the southern Alat collector. In recent years, the salinity of the water has increased significantly as a result of the decrease in the amount of water discharged into the lake. Lake Den American Journal of Plant Sciences and Karakul oases through the Khamza collector in the 1960s-1970s on the site of a natural depression [3].
Currently, Dengizkul receives sewage and collector water from Bukhara region. But these waters cannot maintain the water level of the lake permanently.
In summer, very hot days cause the lake water to evaporate, and as a result of the decrease in the amount of water, the amount of salt in it increases, leading to the accumulation of salt at the bottom of the lake up to half a meter. The results of such studies serve as a scientific basis for improving the economic development and epidemiological sanitation of these areas. A.E. Ergashev [13], T. Taubaev [14], S. Keldibekov [15], N.E. Rashidov [16] and other scientists. High plants have been studied by Esanov [17] and lists 11 species of water and coastal plant species. Also, the plants of Karakir Lake are studies by A.M. Kobilov and others. [18], Devkhona Lake Plants are studied by A.R.

Research Methodology
The object of study is the tall plants distributed in and around Lake Dengizkul, Bukhara region. Data from Flora of Uzbekistan [20], Opredelitel rasteniy Sredney Azii [21] and Analysis of Flora of Bukhara Oasis [22] were used to determine the composition of plant species. Herbarium specimens were collected by the route [23] method. The scientific names of the categories and species are "Opredelitel rasteniy Sredney Azii" [21], according to international indexes-International Plants Names Index [24], The Plant List [25] and the authors of the species Brummit, R.K., Powell, C.E. [26]. The map of Bukhara region was created on the basis of ArcGIS 10 program.

Research Results
In  (Table 1).

Conclusion
Lake Dengizkul was rich in flora and fauna in the early days of its emergence.
However, in recent years, the decrease in the amount of water discharged into the lake and the strong transpiration process have increased the salinity of the water, leading to a decrease in the number of higher aquatic plants. The number of species in this lake was lower than in other lakes of Bukhara region. Even Phragmites australis and Typha angustifolia, which are recorded as the main plant of all lakes, can be found only in some parts of the lake shores. The population of terrestrial plants around the sea is naturally preserved and rich in species.