TY - JOUR
T1 - Bacterial community composition of sediments from Artificial Lake Maslak, Istanbul, Turkey
AU - Balcı, Nurgul
AU - Vardar, Nurcan
AU - Yelboga, Emrah
AU - Karaguler, Nevin Gul
PY - 2012/9
Y1 - 2012/9
N2 - Small artificial lakes are ubiquitous in various natural environments. Small impoundments increase the residence time of water, thereby increasing the potential for retention of nutrients through biological and physical processes.We examined bacterial community structure of Lake Maslak, a small freshwater impoundment located in a densely populated region. The objective of our study was to investigate bacterial communities of the lake sediment which has not been determined and to elucidate the factors controlling bacterial diversity and the biogeochemical processes within the lake. For these purposes, surface water, lake bed sediments, and one core sample were collected. Microbiological characteristic of the lake bed and core sediments was determined by denaturing gradient gel electrophoresis targeting the 16S rRNA gene. Along with the microbiological studies, physicochemical (O 2 , pH, temperature) and geochemical properties of the surface (NO 3 - , NO 2 - , NH 4+ , PO 4 - , SO 2 - , K + , Mg 2+ , Ca 2+ ) and pore water (K + , Mg 2+ , Ca 2+ ) were determined in addition to heavy metals contents (Co Cu, Fe, Zn, Pb, Cd). Eight lake bed and one core sediments were also collected and analyzed for heavy metals and elemental compositions. Nitrate concentration in the surface water ranges from 0.27-1.8 mg/L, and ammonium (0.0-0.83 mg/L) appears to follow nitrate concentration. Sulfate concentration in the surface water (mean 60 mg/L) is greater than those measured in the pore water (mean, 37.5 mg/L). Fe, Zn, Pb, and Cd were not determined in the surface water, whereas Co was significantly higher both in the surface and pore water. Unlike Co, Pb, Zn, and Cd were not measured in the pore water. Lakebed and core sediments show significant enrichment in Pb, Zn, and Cu, indicating anthropogenic pollution. Consistent with geochemical parameters, microbiological analysis suggests a diverse bacterial community in the lake sediments and influence of anthropogenic pollution (e.g., atmospheric emission) on bacterial community.
AB - Small artificial lakes are ubiquitous in various natural environments. Small impoundments increase the residence time of water, thereby increasing the potential for retention of nutrients through biological and physical processes.We examined bacterial community structure of Lake Maslak, a small freshwater impoundment located in a densely populated region. The objective of our study was to investigate bacterial communities of the lake sediment which has not been determined and to elucidate the factors controlling bacterial diversity and the biogeochemical processes within the lake. For these purposes, surface water, lake bed sediments, and one core sample were collected. Microbiological characteristic of the lake bed and core sediments was determined by denaturing gradient gel electrophoresis targeting the 16S rRNA gene. Along with the microbiological studies, physicochemical (O 2 , pH, temperature) and geochemical properties of the surface (NO 3 - , NO 2 - , NH 4+ , PO 4 - , SO 2 - , K + , Mg 2+ , Ca 2+ ) and pore water (K + , Mg 2+ , Ca 2+ ) were determined in addition to heavy metals contents (Co Cu, Fe, Zn, Pb, Cd). Eight lake bed and one core sediments were also collected and analyzed for heavy metals and elemental compositions. Nitrate concentration in the surface water ranges from 0.27-1.8 mg/L, and ammonium (0.0-0.83 mg/L) appears to follow nitrate concentration. Sulfate concentration in the surface water (mean 60 mg/L) is greater than those measured in the pore water (mean, 37.5 mg/L). Fe, Zn, Pb, and Cd were not determined in the surface water, whereas Co was significantly higher both in the surface and pore water. Unlike Co, Pb, Zn, and Cd were not measured in the pore water. Lakebed and core sediments show significant enrichment in Pb, Zn, and Cu, indicating anthropogenic pollution. Consistent with geochemical parameters, microbiological analysis suggests a diverse bacterial community in the lake sediments and influence of anthropogenic pollution (e.g., atmospheric emission) on bacterial community.
KW - 16SrRNA
KW - Bacterial community
KW - DGGE
KW - Sediments
UR - http://www.scopus.com/inward/record.url?scp=84865344162&partnerID=8YFLogxK
U2 - 10.1007/s10661-011-2368-0
DO - 10.1007/s10661-011-2368-0
M3 - Article
C2 - 21947879
AN - SCOPUS:84865344162
SN - 0167-6369
VL - 184
SP - 5641
EP - 5650
JO - Environmental Monitoring and Assessment
JF - Environmental Monitoring and Assessment
IS - 9
ER -