Structural and functional characteristics of phytoplankton, algal mats, detritus and water quality under main abiotic factors in urban ponds (case study of urban settlement Hostomel, Bucha District, Kyiv Region, Ukraine). Report ІI. Quantitative indicators, dominant complexes of phytoplankton, detritus and water quality of urban ponds

The paper deals with phytoplankton quantitative indicators and dominant complex structure, dimensional morphological characteristics of detritus particles in the ponds Hostomel urban settlement. Water quality has been assessed according to characteristics. abundance made up 2648.0–113675.0 thousand cells  dm–3, it was mainly formed by Cyanobacteria. biomass varied within 3.72–16.53 g m–3, which is indicative eutrophic waters. dominated Euglenozoa, Miozoa Bacillariophyta. included small-celled Cyanobacteria, – large-celled Bacillariophyta a certain share Different structures complexes an important adaptation mechanism phytoplankton. Phytoplankton’s high primary productivity completely fulfils energetic trophic demands aquatic organisms at higher levels, unconsumed algal decomposed transferred water column form organic detritus. can be ranged into four classes from minimal < 30 mcm maximal > 101 mcm, whose reach 57.60–62.80 mg dm–3. It indicates that this biological component very forming energy flow, matter circulation relations. assessment saprobiological shown χ–ο-saprobic β-mesosaprobic prevailed under study. So, bodies classified range “very clean”–“clean” “moderately polluted” Unlike most ponds, pond network considered quite safe recreation zone ecological point view attractive green space landscape.