Naslov
A method for determining the P/R ratio in running waters
(Method for determining the P/R ratio in running waters)

Autori
Pavletić, Zlatko ; Matoničkin, Ivo ; Stilinović, Božidar ; Habdija, Ivan

Izvornik
Hydrobiologia (0018-8158) 48 (1976), 1; 51-57

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
P/R ratio ; flowing waters

Sažetak
A method is described for determining the relationship between primary production and respiration (P/R) in rapidly flowing waters. The Bliznec, Medveščak and Černomerec Brooks near Zagreb-Jugoslavia, were taken as examples. The method evolved is based on the determination of oxygen at equally spaced time intervals during day and night. Finally the formula: P/R = (D2-D1) + (N1-N2) + (Δd-Δn) + (N1-N2) - Δn is mentioned, where D, denotes the average oxygen amount measured in the morning at the onset of the photosynthetic activity, D2 the average oxygen amount at the end of the photosynthetic activity, N1 the average oxygen deficiency at the beginning and at the end of dark period. For the purpose of checking, the values of saprobity determined after Zelinka & Marvan's method in a direct ecological way, in the same brook sections, are compared with the P/R values obtained.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA