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Mihai Costică, Naela Costică and Anişoara Stratu

Abstract

This paper brings a contribution to the knowledge of vegetal organisms that participate in the processes of self-cleaning in the urban sector of Nicolina river. By periodical outings on the field, observations on the field and in laboratory, we have identified species of aquatic and paludous macrophytes in the composition of water biocenosis of Nicolina river and algae taxons in the periphyton of some dominant or frequent aquatic and paludous macrophytes. We identified 28 species of superior macrophytes (paludous, aquatic); most of them are perennial species and prefer a sub-layer rich or excessively rich in mineral nitrogen. In the periphyton, the species of Phylum Bacillariophyta are predominant. The species taken into account fulfil numerous ecological services and are essential to assure the dynamic balance of the aquatic ecosystem.

Open access

Anişoara Stratu, Naela Costică and Mihai Costică

Abstract

The purpose of this paper is to underline the role of some wooden species in different units of green areas in Iasi municipality in improving the quality of the environment. By regular visits in the field, we have identified the wooden species frequent in different areas; based on the bibliography in the field, we underlined the ecological characteristics, the resistance to unfavourable climate factors, and the role of these species in improving the quality of the environment. Most species taken into account are resistant to extremely cold weather and to drought; are considered resistant (Acer negundo, Acer pseudoplatanus, Hibiscus syriacus, Ligustrum vulgare) or present moderate resistance (Aesculus hippocastanum, Acer platanoides, Philadelphus coronarius) to polluting elements in the atmosphere. The wooden species considered in this study have profound influence on the environment: they regulate the urban microclimate; they contribute to the concentration reduction of some atmospheric pollutants, the noise level; they improve the edaphical conditions and contribute to the soil consolidation. Some species can be used as bio-monitors of the pollution in urban areas.