G. Andreev

Chemometrical interpretation of analytical data for vertical distribution of some chemical components in sea water

SummaryAnalytical data for vertical distribution (depth profile) of components in sea water are interpreted by the use of multivariate statistical methods (principal components analysis, correspondence factor analysis and cluster analysis). The various chemical components (NH3, P, Zn, Mn, Cu, Fe, O2, pH, salinity and alkalinity) and some physical characteristics (Eh, T, suspended matter) or the depths of sampling (from 0 to 200 m) are classified as objects of similarity. Two principal components are identified as possible really existing natural factors determining the vertical distribution of the components in the sea water phase.

Interpretation of black sea sediments analytical data by the clustering approach

Analytical data consisting of chemical concentration of 11 inorganic components in 20 sampling stations from sediments collected from south‐western part of the Black Sea are treated by cluster analysis. The clustering reflects quite satisfactorily the relations between sampling zones and between chemical elements revealing new chemical and geochemical information.

Occurrence and distribution of some elements in sediments from the black sea

The occurrence and distribution of 11 elements in sediments from the south‐western part of the Black Sea was studied. The samples are analysed by advanced analytical methods which allows a precise differentiation of the concentrations. The distribution is discussed in relation to the distance from the coast.

Distribution and correlation of elements in waters, suspensions, sediments and marine organisms from the black sea

The distribution of several ecologically important elements in Black Sea waters, suspensions, sediments and organisms was studied. The correlation analysis of the data carried out reveals a higher level of correlation along the natural process of elemental accumulation: from waters and suspended matter to the thin surface layer and, then, to sediments and living organisms. According to this conclusion a suggestion is made to perform anthropogenic studies in the marine environment mainly on sediment or biological samples where pollutants distribution can be effectively proven.

Occurrence and distribution of heavy metals in benthic organisms from the black sea

The occurrence and distribution of 10 metals in Black sea marine organisms was studied. The study provides useful initial information on the heavy metal content in and between different groups of benthic organisms and, thus, describes the trends of the ecological situation in the Black Sea.

A rapid statistical correlation between pollution sources and marine concentrations

An attempt is made to find an easy approach for rapid estimation of the connection between concentration of inorganic pollutants in marine environment and the distance from potential polluting source. The approach is based on correlation analysis of a substantial data set for a variety of pollutants and for a long period of time.

Multivariate statistical analysis of heavy metals distribution in benthic organisms

Abstract Data from chemical analysis of different groups of benthic organisms from the Black Sea are treated by the use of multivariate statistical approaches like cluster, factor and principle components analysis. The results obtained deliver new and complete information on the reaction of the organisms of the zoobenthos to heavy metal pollution and on their applicability as possible bioindicators and food chain participants.

Anthropogenic influence on the interelemental correlation in different phases of the marine environment

A simple correlation strategy is applied to obtain information on the anthropogenic influence in different compartments (e.g. water, sediment, suspension, thin boundary surface layer) of the marine environment. Seven chemical components (As, Se, Li, Rb, Fe, Cu, Zn) are analysed for various depths, distances from coast and marine phases. Salinity is also included as chemical parameter.

Vertical distribution of several chemical components in the South‐Western region of the Black Sea

The vertical distribution of several chemical components (NH3, As, P, Zn, Mn, Cu, Fe, O2, alkalinity, salinity and pH) and physical characteristics (suspended matter, T and redox potential Eh of the water phase) has been studied in the marine environment of the south‐western part of the Black Sea. Possible relationships and similarities of different components are checked by the use of cluster analysis. Some explanations of the structure of the clusters formed are suggested taking various aspects of the marine chemistry into account.

Interphase distribution and accumulation of elements in the marine environment of the black sea

The present study deals with some correlational interpretations of a large data set collected from different marine phases. Eight metals (As, Fe, Mn, Cu, Zn, Cr, Co and Se) in ten marine phases (sediment, benthos, algae, phytoplankton, zooplankton, water, suspension and tissues of three marine organisms—liver and fillet from Gobius Niger and tissue from Mytilus Galloprovincialis) are considered as factors determining relations and interactions in a complex marine environment.