TY - JOUR
T1 - The influence of soil pollution on soil microbial biomass and nematode community structure in Navoiy Industrial Park, Uzbekistan
AU - Shukurov, Nosir
AU - Pen-Mouratov, Stanislav
AU - Steinberger, Yosef
N1 - Funding Information:
This project was supported by a UNESCO/ISRAEL co-sponsored fellowship program. The authors express their appreciation to Ms. Ginetta Barness, Ms. Einav Mayzlish and Mr. Evgeny Klimanov for useful comments during the study and for technical assistance. We also appreciate the helpful comments of an anonymous reviewer.
PY - 2006/1
Y1 - 2006/1
N2 - The effects of ammonium-rich and heavy-metal air pollution produced by the industrial enterprises at Navoiy (Uzbekistan) on soil free-living nematodes and microbial population activities was investigated in soil samples collected in a 5-km radius surrounding the industrial enterprises. At each location (n=4), soil samples were collected from the upper layer (0-10 cm) for determination of soil moisture (SM), total organic carbon (Corg), total soluble nitrogen (TSN), soil electrical conductivity (EC) and cations (Ca2+, K +, Na+). Heavy metals (As, Cu, Pb, Zn), soil basal respiration (BR), microbial biomass (Cmic) and nematode populations were determined. The highest level of TSN was found near the industrial enterprises, with 23.8 and 24.0 mg/kg at NavoiAzot and NavoiGRES, respectively. Soil sample pH was found to be weakly alkaline, with levels ranging between 7.9 and 8.1. Mean soil moisture content varied from 0.75% to 0.93% of the wet weight, without any significant differences between the sampling stations. The heavy metals As, Cu, Pb and Zn were accumulated in the upper soil layer. A significant difference was found between soil heavy-metal content for Cu (p<0.0005) and As (p<0.02). Basal respiration and microbial coefficient (Cmic/Corg) were found to be significantly negatively correlated with Cu and As soil content. A significantly positive correlation was found between the Cd concentration and the metabolic quotient (qCO2) (p<0.003). No significant correlation was observed between the soil microbial population and total soluble nitrogen. Furthermore, the qCO 2, which is a known ecophysiological index for the soil microbial population, was found to be correlated with the total number of nematodes in general and with the bacteriovore-feeding group in particular. No significant correlation was observed between the soil microbial population and total soluble nitrogen.
AB - The effects of ammonium-rich and heavy-metal air pollution produced by the industrial enterprises at Navoiy (Uzbekistan) on soil free-living nematodes and microbial population activities was investigated in soil samples collected in a 5-km radius surrounding the industrial enterprises. At each location (n=4), soil samples were collected from the upper layer (0-10 cm) for determination of soil moisture (SM), total organic carbon (Corg), total soluble nitrogen (TSN), soil electrical conductivity (EC) and cations (Ca2+, K +, Na+). Heavy metals (As, Cu, Pb, Zn), soil basal respiration (BR), microbial biomass (Cmic) and nematode populations were determined. The highest level of TSN was found near the industrial enterprises, with 23.8 and 24.0 mg/kg at NavoiAzot and NavoiGRES, respectively. Soil sample pH was found to be weakly alkaline, with levels ranging between 7.9 and 8.1. Mean soil moisture content varied from 0.75% to 0.93% of the wet weight, without any significant differences between the sampling stations. The heavy metals As, Cu, Pb and Zn were accumulated in the upper soil layer. A significant difference was found between soil heavy-metal content for Cu (p<0.0005) and As (p<0.02). Basal respiration and microbial coefficient (Cmic/Corg) were found to be significantly negatively correlated with Cu and As soil content. A significantly positive correlation was found between the Cd concentration and the metabolic quotient (qCO2) (p<0.003). No significant correlation was observed between the soil microbial population and total soluble nitrogen. Furthermore, the qCO 2, which is a known ecophysiological index for the soil microbial population, was found to be correlated with the total number of nematodes in general and with the bacteriovore-feeding group in particular. No significant correlation was observed between the soil microbial population and total soluble nitrogen.
KW - Ecological indices
KW - Heavy metals
KW - Microbial biomass
KW - Nitrogen pollution
KW - Soil nematode community structure
KW - Soil pollution
UR - http://www.scopus.com/inward/record.url?scp=29044449101&partnerID=8YFLogxK
U2 - 10.1016/j.envint.2004.12.003
DO - 10.1016/j.envint.2004.12.003
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C2 - 16143397
AN - SCOPUS:29044449101
VL - 32
SP - 1
EP - 11
JO - Environment international
JF - Environment international
SN - 0160-4120
IS - 1
ER -