scholarly journals Rare Macroscopic Algae Species In The Pechora And Vychegda River Basins (North-Eastern Part Of European Russia)

2015 ◽  
Vol 20 (2) ◽  
pp. 77-86 ◽  
Author(s):  
Elena Patova ◽  
Irina Sterlyagova ◽  
Yuliya Shabalina

AbstractTen rare species of macroscopic algae were found in freshwater ecosystems of the Pechora and Vychegda River basins, belonging to four divisions: Cyanoprokaryota - 1 species, Rhodophyta - 3, Chrysophyta - 1, Charophy-ta - 5. Some of these were included in the regional Red Data Books of Nenets Autonomous District and Komi Republic, others were recommended to be included. Areas of distribution were marked; algae development conditions and limiting factors were described.

2018 ◽  
Vol 65 (4) ◽  
pp. 59-63
Author(s):  
S.V. Firsova ◽  
◽  
A.P. Sofronov ◽  
A.A. Rusinov ◽  
◽  
...  

2020 ◽  
Vol 27 ◽  
pp. 00004
Author(s):  
Alexander Yuzhakov ◽  
Veronika Kharzinova ◽  
Kasim Laishev

For the first time, comprehensive studies of the phenogenetic features of the Ural ecotype of domestic reindeer of the Nenets breed were performed. It was found out that the Ural reindeer relative to other ecotypes of the Nenets breed have smaller linear dimensions and live body weight. The studied group of reindeer was characterized by the minimum values of the majority of population genetic indicators, including the effective number of alleles (Ne = 4.422 ± 0.614), the Shannon information index (I = 1.663 ± 0.102), and the level of both the observed and expected heterozygosity (Ho = 0.561 ± 0.064 and He = 0.740 ± 0.035, respectively). It exceeded two other samples from neighboring breeding regions (Nenets Autonomous district and the Komi Republic) in the average number of alleles per locus: (Na = 9.667 ± 0.577 versus Na = 9.555 ± 0.669 and Na = 9.557 ± 0.709, respectively). Animals of the Ural population (YAM) have a closer genetic structure with reindeer individuals of the neighboring Nenets Autonomous district (NAO). The studied sample of the Nenets breed was characterized by a shift in genetic diversity towards a lack of heterozygotes, as evidenced by the positive Fis values. The introduction of genetic methods in the reindeer herding will allow improving the breeding work in the industry, revealing intraspecific genetic variation in inbreeding herds and identifying intrabreed groups of animals.


2020 ◽  
Vol 6 (1) ◽  
pp. 46-58
Author(s):  
N. Mursal ◽  

7 cenopopulations (CP) of a rare species of Crocus speciosus M.Bieb. in Khizi, Guba, Khachmaz regions of Azerbaijan are described, ontogenetic, demographic structure is investigated, the influence of climatic factors on morphometric variability is studied. In the ontogenesis of the studied species, 4 periods and 8 ontogenetic states were distinguished. It was revealed that except CP 1, all cenopopulations are completely, CP 3, CP 6 and CP 7 are transitional, and the others are young type. As a result of the analysis of the spatial and demographic structure of cenopopulations, it was found that the state of the studied cenopopulations is ambiguous. Individuals with the highest height were observed in CP 3 and lower in CP 1. The highest morphometric parameters of the gen-erative organs were observed in CP 5–6. It was found that the most favorable conditions for C. speciosus are the subtropical climate, as well as alluvial-meadow-forest and mountain-gray-brown rich soils. The obtained results allow us to conclude that the altitude and soilclimatic conditions of the areas have a significant effect on the individuals morphometric characteristics of C. speciosus. The smallest anthropogenic impact was noted in CP 1–3, while CP 4–7 are under high anthropogenic pressure due to the expansion of infrastructure in the Caspian coastal zone.


Author(s):  
Sergey B. Kuklev ◽  
Vladimir A. Silkin ◽  
Valeriy K. Chasovnikov ◽  
Andrey G. Zatsepin ◽  
Larisa A. Pautova ◽  
...  

On June 7, 2018, a sub-mesoscale anticyclonic eddy induced by the wind (north-east) was registered on the shelf in the area of the city of Gelendzhik. With the help of field multidisciplinary expedition ship surveys, it was shown that this eddy exists in the layer above the seasonal thermocline. At the periphery of the eddy weak variability of hydrochemical parameters and quantitative indicators of phytoplankton were recorded. The result of the formation of such eddy structure was a shift in the structure of phytoplankton – the annual observed coccolithophores bloom was not registered.


2013 ◽  
Vol 25 (1-2) ◽  
pp. 136-148
Author(s):  
I. V. Gryb

The concept of an explosion in freshwater ecosystems as a result of the release of accumulated energy, accompanied by the destruction of the steady climax successions of hydrocenoses is presented. The typification of local explosions as well as methods for assessing their risk during the development of river basins are shown. The change in atmospheric circulation, impaired phases of the hydrological regime of rivers, increasing the average temperature of the planet, including in Polesie to 0,6 ºC, deforestation leads to concentration and release of huge amounts of unmanaged terrestrial energy, which manifests itself in the form of disasters and emergencies. Hydroecological explosion is formed as a result of multifactorial external influence (natural and anthropogenic) on the water body in a certain period of time. Moreover, its level at wastewater discharge depends on the mass of recycled impurities and behaved processing capacity of the reservoir, and the mass of dumped on biocides and the possibility of the water flow to their dilution and to the utilization of non-toxic concentrations. In all these cases the preservation of "centers of life" in the tributaries of the first order – local fish reproduction areas contributed to ecosystem recovery, and the entire ecosystem has evolved from equilibrium to non-equilibrium with further restructuring after the explosion and environmental transition to a new trophic level. It means that hydroecological explosion can be researched as the logical course of development of living matter in abiotic environmental conditions, ending abruptly with the formation of new species composition cenoses and new bio-productivity. The buffer capacity of the water environment is reduced due to re-development and anthropic transformation of geobiocenoses of river basins, which leads to a weakening of life resistance. This applies particularly to the southern industrial regions of Ukraine, located in the arid zone that is even more relevant in the context of increased average temperature due to the greenhouse effect, as well as to Polesie (Western, Central and Chernihiv), had been exposed to large-scale drainage of 60-80th years, which contributed to the degradation of peatlands and fitostroma. Imposing the western trace of emissions from the Chernobyl accident to these areas had created the conditions of prolonged hydroecological explosion in an intense process of aging water bodies, especially lakes, change in species composition of fish fauna and the occurrence of neoplasms at the organismal level. Under these conditions, for the existence of man and the environment the vitaukta should be strengthened, i.e. buffer resistance and capacitance the aquatic environment, bioefficiency on the one hand and balanced using the energy deposited - on the other. This will restore the functioning of ecosystems "channel-floodplain", "riverbed-lake", reducing the energy load on the aquatic environment. Hydroecological explosions of natural origin can not be considered a pathology – it is a jump process of natural selection of species of biota. Another thing, if they are of anthropogenic origin and if the magnitude of such an impact is on the power of geological factors. Hydroecological explosions can be regarded as a manifestation of environmental wars that consciously or unconsciously, human society is waging against themselves and their kind in the river basins, so prevention of entropy increase in the aquatic environment and the prevention of hydroecological explosions is a matter of human survival. While the man - is not the final link in the development of living matter, it can develop without him, as matter is eternal, and the forms of its existence are different.


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