soil - Lublin

zone, while in Nadrybie lake the level of methane emission was four time higher
than in the pelagial of Szczecin lake.
Table 2.
Seasonal methane emission [t/ha/day] from the anthropogenic
lakes under study.
Spring Summer Autumn
Nadrybie lithoral 0,012 0,252 0,002
Nadrybie sublithoral 0,043 0,002 0,001
Nadrybie pelagial - 0,012 -
Szczecin lithoral 0,086 0,008 -
Szczecin sublhitoral 0.178 0,028 0,0002
Szczecin pelagial 0,007 0,002 0,0002
The collected results of emitted gases from natural and anthropogenic lakes are
presented in Fig.5.
30
O 2
60
CH 4
25
50
20
40
%
15
10
5
%
30
20
10
0
Szczecin N adrybie Piaseczno U ściwierz R otcze M oszne
L S P
0
Szczecin N adrybie Piaseczno U ściwierz R otcze M oszne
L S P
90
N 2
5
CO 2
80
70
4
60
50
3
%
40
30
%
2
20
10
1
0
Szczecin N adrybie Piaseczno U ściwierz R otcze M oszne
0
Szczecin N adrybie Piaseczno U ściwierz R otcze M oszne
L S P
L S P
Fig.5. Gas composition from Szczecin and Nadrybie anthropogenic lakes as well as
from Piaseczno, Uściwierz, Rotcze and Moszne natural lakes at transect :L-lithoral, S-
sublithoral, P-pelagial .
34