Abstract. The use of modern eco-oriented approaches in agriculture ensures not only the conservation of natural resources and the restoration of damaged ecosystems, but also the growth of agrocenoses productivity, increasing the tolerance of artificial ecosystems to unfavorable factors of natural and anthropic origin. The identification of consortia relations, carried out in the present article, allows to create the information database for accumulating and processing information on the patterns of ecosystem functioning in arid conditions. This provides researchers and farmers with a set of unified ecosystem tools to ensure sustainability and productivity of agrocenosis that increases the economic efficiency of management system and ensures the success of environmental management.The research carried out in three typical landscape localizations are intended to assess the state of agrocenoses, the nearby low-changed steppe sites and man-made intrusions, characterized by a high degree of anthropogenic load. The patterns of species distribution in the studied communities, the features of material and energy exchange will allow creating a database for describing the typical consortia, forecasting processes in agrocenoses and natural communities, controling the metabolism of the communities using metered-dose unidirectional biotic and abiotic agents. The distinctive natural and artificially modified communities are described. Soil and climate, phytocenological, zoological and microbiological characteristics of the studied objects are given. The peculiar forms of intrusions, the features of spatial distribution and quantitative dynamics of the species composing the communities are revealed and described; the typical species-edificators are pre-determined.The authors also determine the choice of consortium relations that are significant for the implementation of targeted high-precision management of biocenoses with the aim of increasing the stability of natural communities and the economic efficiency of agrocenoses.

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The subpolar North Atlantic (SPNA) Ocean has complex hydrography, and moderates the global climate through the Atlantic Meridional Overturning Circulation (AMOC). The surface water mass dynamics in SPNA and the upper limb of AMOC, govern the plankton distribution. Specifically, the habitat of modern planktic foraminifera is strongly affected by the SPNA hydrography. In the present study, 25 surface sediment samples from the Labrador Sea to the Iceland-Faroe-Shetland Channel (IFSC) were examined for planktic foraminifera distribution along a latitudinal transect at 59.50°N. The planktic foraminifera distribution followed the transition in water mass structure in the study area from the Sub-Arctic water in the west to the warm North Atlantic water in the east. Temperature and salinity are two dominant ecological factors controlling planktic foraminifera assemblages in the region. This hydrographic contrast was also reflected in the ratio of Neogloboquadrina pachyderma/Neogloboquadrina incompta along the transect. Based on the cluster analysis, the planktic foraminifera assemblages could be assigned to three groups. A cold/polar group in the Labrador Sea, a mixed (both cold and warm) group in the Irminger Sea and IFSC, and a warmer temperate group in the eastern part of the transect were represented by different planktic foraminifera assemblages. Additionally, a decrease in Globorotalia inflata in the eastern transect and an increase in Turborotalita quinqueloba in the Iceland basin and Irminger Sea was observed in our study when compared with the published dataset. From this, we suggest a shift in planktic assemblages in the SPNA. The present study on the distribution of modern planktic foraminifera can help paleoceanographic reconstructions in the SPNA ocean.

The article presents a microphotograph dataset of 106 taxa of benthic foraminifera (BF) from surface sediments collected at 26 grab station during RV Akademik Ioffe 51st cruise (summer 2016). The selected stations are located along a 59.5°N transect in the North Atlantic. This is the key area of climate control, where the interaction of warm surface and cold deep water masses takes place, which affects the operation of the global oceanic thermohaline circulation. The analysis of the benthic foraminiferal assemblages allows us to describe the properties of bottom water mass, to draw conclusions about the environmental parameters at the bottom. This photo dataset will facilitate the identification of species of BF, and thus will accelerate the routine process of micropaleontological analysis and the subsequent reconstruction of environmental conditions.