DIVERSITY AND PHYTOPLANKTON FUNCTIONING IN THE PRUT RIVER.

Autor: Ungureanu, Laurenţia, Toderas, Ion, Tumanova, Daria, Ungureanu, Grigore, Melniciuc, Cristina
Předmět:
Zdroj: Annals of the University Dunarea de Jos of Galati: Fascicle II, Mathematics, Physics, Theoretical Mechanics; 2013, Vol. 36 Issue 2, p228-231, 4p
Abstrakt: capacity in the Prut river were evaluated. Phytoplankton is characterized by large amplitude of space-time oscillations of number and biomass values, that stands out when comparing their values over time (seasonal and multiannual dynamics) and space (distribution of algal communities in different sectors of the Prut river). The seasonal and spatial fluctuations of phytoplankton biomass values and primary production values in the Prut river are followed by successions of phytoplankton structure, changes in nutrient concentrations and oscillations of water transparency values. It was reported the reduction of phytoplankton diversity in the last years, influenced by changes in hydrological and hydrochemical regimes because of wastewater discharges and intake of nutrients and chemical substances from water basins situated in adjacent territories. The values of destruction of organic substances were higher than primary production values. The A/R ratio reflects the negative balance of formation of organic substances in the Prut river. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index