Home – Home – Jornals – Contemporary Problems of Ecology 2008 number 1

Patterns of distribution and community structure of heterotrophic flagellates and bacterioplankton were investigated in the Vatinsky Yogan river (the Tyumen region). Low microbial abundance was recorded in the river. 38 species of heterotrophic flagellates from nine taxons and a group of uncertain taxonomic position were found in the river. The majority of them belonged to the consumers of bacteria and detritus. A positive correlation between the oil concentrations in water and in bottom sediments, on the one hand, and the abundance and biodiversity of heterotrophic flagellates, on the other hand, was established.

The comparative an

The goal of the experimental investigation is to compare the activities of the cellular elements of thermoresistivity in the eurybiont amphipoda species belonging to different faunal groups. Amphi

The species composition of tugai and desert communities of orthopterous insects in the lowlands of South-Western Tajikistan is described, the features of their formation at the height of 300 to 800 m above sea level are demonstrated. The diversity of communities is observed to decrease with an increase in absolute height. The season

Development of irrigation in the plains around the Pamiro-Alay caused the formation of new habitats for dragonflies (Insecta, Odon

Six natural-zonal and altitudinal-zonal ant complexes and five areal groups were discovered in the ant faun

Green leaves of immature plants of Serratula coron

Monoaminoxidase that deaminizes serotonin, tryptamine, benzylamine was revealed in the mitochondrial fraction and homogenates of liver tissues of fish species Cyprinidae (Carassius carassius, Carpinus carpio), Coregonidae (Coregonus peled), Carangidae (Trachrus picturatus picturatus). Deamin

Changes in the phenetic diversity of the population of East-Siberian grayling Thymallus arcticus pallasii Valenciennes, 1848 from the Buyunda river (the upper Kolyma) depending on the sex and age of individuals are analyzed. Among 16 phenes of the coloring of grayling dorsal fin in Eurasia four ones were detected on the dorsal fin of the East-Siberian subspecies. Fish of advanced age have a larger number of webs with the long-strip phene in comparison with younger fish, mainly webs without patterns or with patterns in the form of spots and short strips are present. Statistically significant differences between female and male individuals in the frequencies of the two phenes of four were detected. Variability of patterns in connection with fish growth should be taken into account when describing the habitus of grayling.

The data on the interpopulation changeability and differentiation of pike populations in different types of water bodies on Middle and South Ural are presented. The investigated pike populations are significantly different from each other both in the entire complex of morphological traits, and separately in the complexes of plastic and account traits. The main component of distinctions between populations is a complex of plastic traits. In the population distinction over the entire set of features, the biotope conditions had a larger weight than the affiliation of a water body to a definite basin or its geographic position.

The presented data show that under conditions of a city forest park the total abundance and species alpha-diversity of small-sized ground vertebrate animals (amphibian and small mammals) can be conserved close to the n

For the purpose of ornithofaunistic zoning, Northern Eurasia within the boundaries of the USSR of 1990 was zoned into 250 regions over the vegetation map of 1 : 20 000 000 scale so that each region occupied a territory of n

A city is like an island among the natural landscape. Therefore the principles of island ecology are suitable for a city. This approach may be used also to consider a city within its boundaries: the number of green open spaces, aquatories, their area, degree of fragmentation and distance from the perimeter of the urban zone. Natural analogues of urban bird communities in relation to diversity and domination may be the communities at an early stage of succession, under extremal conditions or often exposed to disturbances. Obviously adaptation of birds to urban habitats occurs as a result of pre-adaptation and various modifications. In some cases urban bird populations survive changes of reproductive biology and behavior. However, the observed changes are not universal for different species.

The data on the distribution of 26 species of birds (Passeriformes and Piciformes) were collected on the permanent test area in Moscow region by the method of repeated mapping of nest territories. The distribution of species according to environmental conditions was an

The effect of photoperiodic conditions of the Subarctic region on the feed and sexual activities of bird species wintering at the latitude of the Arctic circle, on time constraints, duration and completeness of post-juven

The bird communities of one of the least investigated regions of Russia is characterized. The main trends of territorial changes of the dominant and faun

Results of sensurihg of migratory birds during the years 1995

Reasons of variation in the number of eggs in duck clutch are considered for three duck species. The data on 1676 nests of mallard (An

The problem of perennial dynamics of the number of rodents is under investigation for more than a century. Its stalemate state is proposed to be accepted. In our opinion, the crisis originates from the attempts of the majority of researchers to reveal the facts of mortality leading to the failure of a population instead of revealing augmentation of population as a result of reproduction. The phenomenology of the dependence of the cyclic phase on the intensity of population reproduction is concealed. It is proposed to consider the problem of the population dynamics as two separate problems: the dynamics of

Siberian roe inhabits various forest formations growing in the subzones of middle and northern taiga of the middle part of East Siberia. However, the ecological connection of this species with the tracts of