Vertical distribution of hydrolysis rates of EEA in Lake Sevan in 2010 March/June. A = α-glucosidase; B = ß-glucosidase; C= phosphatase; D = leucin aminepeptidase; E = ß-galactosidase; F = N-acet; EEA <0.2 = external enzymes; EEA-Ecto = ectoenzymes; M = March; J = June  

Contexts in source publication

Context 1

... medium-size bacterial cells were observed in June (cell mean volume 0.20 µm 3 ) with biomass values accounted for 68.4 -108.54 µg C L -1 (Figure 2). The EEA, except for leucine-aminopeptidase, ranged from 0.11 to 10.41 μg C/P L -1 h -1 , with the lowest values for β-D-galactosidase of the maximal up to 2 % share (Figure 3). Activity of leucine-aminopeptidase was one magnitude higher (from 5.93 up to 30.39 μg C L -1 h -1 ), with up to 74 % proportional share in the total EEA. ...

Context 2

... in Lake Sevan waters reduced EEA with increased temperatures was quite contrary with no similar records in the existing literature. In June water higher temperature and higher bacterial density were coupled with the mean values of activities of total enzymes being lower, than those in March (an exceptions of N-acetylglucosaminidase) (Figure 3). Reduced activities of 6 studied enzymes in both fractions (ecto- and exoenzymes) was quantified especially right at the thermocline level (20-25 m) -"above" -"at" -"below", differing approximately three times. ...