T.E. Oroian


THE MONITORING OF PHYTOPLANKTON EVOLUTION BY BIOLOGICAL YEAR WITHIN ARINIS-MARAMURES FISHERY COMPLEX

T.E. Oroian, R.G. Oroian, Cristina Hegedus, V. Cighi, D. Dronca

Abstract
The research took place on the period 2005-2008, being a part of CEEX project, number 45/2005, module I Biotech. The purpose of the study was the monitoring of phytoplankton evolution in the nine fish ponds, having in total a surface of 90 hectares, being an indicator of the water biologic qualitative level. The phytoplankton having algae in its composition, a base for the consumers development, we observed the composition of Chlorophyceae, Cyanophyceae and Diatoms species. We established the taxonomic composition for each month of the study, evaluating the species number, as well as the percent from total value. Specially, we examined Cyanophyceae, Crysophyceae, Bacillariophyceae, Chlorophyceae, Conjugatophyceae, Euglenophyceae, Cryptophyceae species. Within the Chlorophyceae we identified: volvocals, protococaceae, Desmids; within the Cyanophyceae, the genera: Spirulina, Coelosphaerium, Oscillatoria sp., Dactylococcopsis, Merismopedia, Microcystis. The identified Diatoms, especially in springtime, are included in the genera: Melosira, Cyclotella, Amphora, Navicula sp., Achnanthes, Asterionella, Cymbella, Cocconeis, Fragillaria, Synedra. The phytoplankton taxonomic composition shows a good qualitative water, proper for carp culture.

Key words: phytoplankton, taxonomic composition, Chlorophyceae, Cyanophyceae, Diatoms

MONITORIZAREA EVOLUTIEI FITOPLANCTONULUI PE AN BIOLOGIC ĪN COMPLEXUL PISCICOL ARINIS- MARAMURES

T.E. Oroian, R.G. Oroian, Cristina Hegedus, V. Cighi, D. Dronca

Rezumat
Cercetarea s-a derulat pe perioada 2005-2008, fiind o componenta a proiectului CEEX nr. 45/2005, modul I Biotech. Scopul cercetarii a fost de monitorizare pe an biologic a evolutiei fitoplanctonului īn cele 9 bazine, īn suprafata totala de 90 Ha, care este un indicator al nivelului biologic calitativ al apei. Fitoplanctonul fiind alcatuit exclusive din alge, pe baza carora se dezvolta consumatorii, s-a urmarit compozitia īn specii de cloroficee, cianoficee si diatomee. S-a stabilit īn fiecare din lunile analizate compozitia taxonomica, prin evaluarea numarului de specii, ca si a procentului pe care el īl reprezinta din total. In mod special au fost urmarite speciile de Cyanophyceae, Crysophyceae, Bacillariophyceae, Chlorophyceae, Conjugatophyceae, Euglenophyceae, Cryptophyceae. Au fost identificate dintre cloroficee: volvocalele, protococacele, desmidiaceele; dintre cianoficee genurile: Spirulina, Coelosphaerium, Oscillatoria sp., Dactylococcopsis, Merismopedia, Microcystis. Diatomeele identificate cu preponderenta primavara, fac parte din genurile: Melosira, Cyclotella, Amphora, Navicula sp., Achnanthes, Asterionella, Cymbella, Cocconeis, Fragillaria, Synedra. Componenta taxonomica a fitoplantonului evidentiaza o apa de buna calitate, propice pentru ciprinicultura.

Cuvinte cheie: fitoplancton, componenta taxonomica, cloroficee, cianoficee, diatomee