Ecology

Characteristics of Plants Communities with the Participation of HalocnemumStrobilaceum (Pall.) Bieb. in Saratov Region

In this article the characteristic of plant communities with the participation of Halocnemum strobilaceum in Saratov region is considered. The information about vegetation composition, structure and rare plants species is provided. The environmental significance of the territory is evaluated and the recommendations for inclusion it’s in the new integrated natural monuments of the region are given.

To the Question of Conservation of the Unique Halophytic Vegetation of the Saratov Region

In this article the halophytic vegetation characteristic of three unique for the Saratov region territories is considered. The information about vegetation composition, structure and rare plants species is provided. The environmental significance of each territory is evaluated and the recommendations for inclusion it’s in the new integrated natural monuments of the region are given.

Trophobiotic Associations between Ants (Hymenoptera, Formicidae) and Aphids (Hemiptera, Aphidomorpha) in South Zauralye

Trophobiosis with aphids producing honeydew, which is one of the main energetic resources for ants, plays an important role in their life. These are the first data on the trophobiotic as- sociations between ants and aphids in South Zauralye. Investigations were carried out in the most typical biotopes for the region (forest, meadow, steppe and antropogenic biotopes) in 2006–2013. Trophobiotic interactions with aphids are revealed for 17 ant species from two subfamilies: Formicinae (Formica – 7 species, Lasius – 3, Camponotus – 3) and Myrmicinae (Myrmica – 4).

Seasonal dynamics Individual Plot Sizes of Males and Females of the American Mink (Neovison vison Schreber, 1777) in the Saratov Region

The estimation size of individual plots the American mink on the res- ervoirs in Saratov region in the period from 2000 to 2014. The average plot size of males – 30.6 hectares, females – 27.8 hectares. During the cold period on most waters plot sizes are increased almost two- fold. Found that females go farther from the center of the rivers and streams than males (females – 203.8 m; males – 166.7 m). American mink is more inclined to the rivers with wide floodplain (χ2 = 26.2; p = 0.01). River with a narrow floodplain populated predator with lower density (χ2 = 15.3; p = 0.04).

Assessment of Self-purification of the Volga River Near the City of Saratov

Assess the degree of pollution and natural purification of the water environment of the Volga river near the city of Saratov. Defined indexes pollution and natural purification of the water and set classes quality of the aquatic environment.

Location Features and Abundance of Waterfowl in the Pond Cooler of the Balakovo Nuclear Power Plant in the Winter

On the basis of our 2003–2014 field surveys of the pond cooler of BNPP (Saratov region), peculiarities of the spatial distribution and abundance of waterfowl in the winter were revealed. The stay of 6 waterfowl species was noted during this period in different parts of the pond cooler, namely, Podiceps cristatus, Anas platyrhynchos, Aythya ferina, Aythya fuligula, Bucephala clangula, and Mergus mer- ganser. Interannual variations in the population dynamics of some birds (A. platyrhynchos, B. clangula) were significant and caused by the pre-winter weather.

The Adaptations of Woody Plants after a Thermal Stress in the Khopyor River Region

The living state of woody plants having different levels of thermal damages in the summer of 2010 was studied. It is shown that a number of species had partial drying out and the death of trees unevenly in plantations of different age and localities. In a favourable ecological environment they remained healthy. They are mesophytes and mesohygrophytes which are on the southern border of the areas, mostly explerents. The trees and shrubs of floodplain forests and certain introducents are tolerant of a thermal stress.

Current State of «Elizavetinskie Mountan Steppes»: Results of 45-years Investigation (Sverdlovsk Oblast)

Current state of the relict fragment of steppe vegetation in boreal zone was studied. At the same time the changes that have been happening during the last 45 years were revealed. Species composition stability and area reduction of the studied fragment as a consequence of Pinus sylvestris expansion were shown.

New Data on the Halophytic Vegetation of the Saratov Region

This article is devote to new halophytic vegetation associations of the Saratov region. The diagnostic species, full species composition, proportion of species are defined for each community. Processing and interpretation of obtained materials held in terms of ecological-floristic approach.

ЭКОЛОГИЧЕСКОЕ СОСТОЯНИЕ БИОЦЕНОЗОВ МОДЕЛЬНОГО УЧАСТКА ПЕРИФЕРИЙНОЙ ЧАСТИ ПРИРОДНОГО ПАРКА «КУМЫСНАЯ ПОЛЯНА» ПО РЕЗУЛЬТАТАМ ИССЛЕДОВАНИЙ 2013 ГОДА

Представлена экологическая характеристика модельного
участка природного парка «Кумысная поляна», тесно приле-
гающего к жилым массивам города. Использовались марш-
рутные, флористические, гидробиологические, сравнитель-
но-морфологические популяционные методы исследования.
Проведённое исследование выявило основные формы воз-
действия рекреации на состояние фито- и гидроценозов при-
родного парка: вытаптывание территории, замусоривание,
загрязнение и зарастание водоёмов, повреждения древес-

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