Relationships between Bacterial Tolerance Levels and Forms of Copper and Zinc in Soils

The effects of various fractions of copper (Cu) and zinc (Zn) on soil bacteria were evaluated by the heavy metal tolerance level of the bacterial community (IC50) in soil samples collected near a mine. The IC50 values had no relationship with the total concentrations of Zn and Cu in the soils, but w...

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Published in:Journal of environmental quality 2002-09, Vol.31 (5), p.1570-1575
Main Authors: Saeki, K, Kunito, T, Oyaizu, H, Matsumoto, S
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Animal, plant and microbial ecology
Applied ecology
Bacteria
Biological and medical sciences
Calcium chloride
Copper
Copper - adverse effects
Copper - pharmacology
Correlation coefficient
Ecotoxicology, biological effects of pollution
Fundamental and applied biological sciences. Psychology
Heavy metals
Metal concentrations
Metal ions
Microbial ecology
Saturated soils
Soil
Soil Microbiology
Soil Pollutants - adverse effects
Soil Pollutants - pharmacology
Soil solution
Solubility
Speciation
Terrestrial environment, soil, air
Zinc
Zinc - adverse effects
Zinc - pharmacology
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cited_by cdi_FETCH-LOGICAL-a6020-93fb07cb0eb39a8dc7be9edbac335d08b6af6debef9e472f2f9d7af86bfa68593
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container_issue 5
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creator Saeki, K
Kunito, T
Oyaizu, H
Matsumoto, S
description The effects of various fractions of copper (Cu) and zinc (Zn) on soil bacteria were evaluated by the heavy metal tolerance level of the bacterial community (IC50) in soil samples collected near a mine. The IC50 values had no relationship with the total concentrations of Zn and Cu in the soils, but were weakly correlated with the 0.05 M CaCl2–extractable form of each metal in the soils (Cu: R 2 = 0.670, p < 0.01; Zn: R 2 = 0.453, p < 0.05). It was found that the IC50 correlated strongly with the total concentration of each metal in the extracts from water-saturated soil samples, described below as “soil solution” (Cu: R 2 = 0.789, p < 0.01; Zn: R 2 = 0.617, p < 0.01). The speciation of these metals in the soil solutions was estimated using an equilibrium thermodynamic computer model, SOILCHEM. Simulated free Cu ion ranged from 18 to 98% of total Cu, and organic complexes of Cu ranged from
doi_str_mv 10.2134/jeq2002.1570
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The IC50 values had no relationship with the total concentrations of Zn and Cu in the soils, but were weakly correlated with the 0.05 M CaCl2–extractable form of each metal in the soils (Cu: R 2 = 0.670, p < 0.01; Zn: R 2 = 0.453, p < 0.05). It was found that the IC50 correlated strongly with the total concentration of each metal in the extracts from water-saturated soil samples, described below as “soil solution” (Cu: R 2 = 0.789, p < 0.01; Zn: R 2 = 0.617, p < 0.01). The speciation of these metals in the soil solutions was estimated using an equilibrium thermodynamic computer model, SOILCHEM. Simulated free Cu ion ranged from 18 to 98% of total Cu, and organic complexes of Cu ranged from <1 to 56%. In all samples, Zn existing as the free ion was estimated to be more than 80% of total Zn in the soil solutions. The IC50 values were also correlated with the estimated free metal ion activities, but with slightly lower correlation coefficients than found for total concentration in the soil solutions (Cu: R 2 = 0.735, p < 0.01; Zn: R 2 = 0.610, p < 0.01). The results suggest that not only high metal ion activities, but also total dissolved metal concentrations in soil solutions may affect the bacterial community.]]></description><identifier>ISSN: 0047-2425</identifier><identifier>EISSN: 1537-2537</identifier><identifier>DOI: 10.2134/jeq2002.1570</identifier><identifier>PMID: 12371174</identifier><identifier>CODEN: JEVQAA</identifier><language>eng</language><publisher>Madison: American Society of Agronomy, Crop Science Society of America, Soil Science Society</publisher><subject>Adaptation, Physiological ; Animal, plant and microbial ecology ; Applied ecology ; Bacteria ; Biological and medical sciences ; Calcium chloride ; Copper ; Copper - adverse effects ; Copper - pharmacology ; Correlation coefficient ; Ecotoxicology, biological effects of pollution ; Fundamental and applied biological sciences. Psychology ; Heavy metals ; Metal concentrations ; Metal ions ; Microbial ecology ; Saturated soils ; Soil ; Soil Microbiology ; Soil Pollutants - adverse effects ; Soil Pollutants - pharmacology ; Soil solution ; Solubility ; Speciation ; Terrestrial environment, soil, air ; Zinc ; Zinc - adverse effects ; Zinc - pharmacology</subject><ispartof>Journal of environmental quality, 2002-09, Vol.31 (5), p.1570-1575</ispartof><rights>Published in J. Environ. 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The IC50 values had no relationship with the total concentrations of Zn and Cu in the soils, but were weakly correlated with the 0.05 M CaCl2–extractable form of each metal in the soils (Cu: R 2 = 0.670, p < 0.01; Zn: R 2 = 0.453, p < 0.05). It was found that the IC50 correlated strongly with the total concentration of each metal in the extracts from water-saturated soil samples, described below as “soil solution” (Cu: R 2 = 0.789, p < 0.01; Zn: R 2 = 0.617, p < 0.01). The speciation of these metals in the soil solutions was estimated using an equilibrium thermodynamic computer model, SOILCHEM. Simulated free Cu ion ranged from 18 to 98% of total Cu, and organic complexes of Cu ranged from <1 to 56%. In all samples, Zn existing as the free ion was estimated to be more than 80% of total Zn in the soil solutions. The IC50 values were also correlated with the estimated free metal ion activities, but with slightly lower correlation coefficients than found for total concentration in the soil solutions (Cu: R 2 = 0.735, p < 0.01; Zn: R 2 = 0.610, p < 0.01). The results suggest that not only high metal ion activities, but also total dissolved metal concentrations in soil solutions may affect the bacterial community.]]></description><subject>Adaptation, Physiological</subject><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Bacteria</subject><subject>Biological and medical sciences</subject><subject>Calcium chloride</subject><subject>Copper</subject><subject>Copper - adverse effects</subject><subject>Copper - pharmacology</subject><subject>Correlation coefficient</subject><subject>Ecotoxicology, biological effects of pollution</subject><subject>Fundamental and applied biological sciences. 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The IC50 values had no relationship with the total concentrations of Zn and Cu in the soils, but were weakly correlated with the 0.05 M CaCl2–extractable form of each metal in the soils (Cu: R 2 = 0.670, p < 0.01; Zn: R 2 = 0.453, p < 0.05). It was found that the IC50 correlated strongly with the total concentration of each metal in the extracts from water-saturated soil samples, described below as “soil solution” (Cu: R 2 = 0.789, p < 0.01; Zn: R 2 = 0.617, p < 0.01). The speciation of these metals in the soil solutions was estimated using an equilibrium thermodynamic computer model, SOILCHEM. Simulated free Cu ion ranged from 18 to 98% of total Cu, and organic complexes of Cu ranged from <1 to 56%. In all samples, Zn existing as the free ion was estimated to be more than 80% of total Zn in the soil solutions. The IC50 values were also correlated with the estimated free metal ion activities, but with slightly lower correlation coefficients than found for total concentration in the soil solutions (Cu: R 2 = 0.735, p < 0.01; Zn: R 2 = 0.610, p < 0.01). The results suggest that not only high metal ion activities, but also total dissolved metal concentrations in soil solutions may affect the bacterial community.]]></abstract><cop>Madison</cop><pub>American Society of Agronomy, Crop Science Society of America, Soil Science Society</pub><pmid>12371174</pmid><doi>10.2134/jeq2002.1570</doi><tpages>6</tpages></addata></record>
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subjects Adaptation, Physiological
Animal, plant and microbial ecology
Applied ecology
Bacteria
Biological and medical sciences
Calcium chloride
Copper
Copper - adverse effects
Copper - pharmacology
Correlation coefficient
Ecotoxicology, biological effects of pollution
Fundamental and applied biological sciences. Psychology
Heavy metals
Metal concentrations
Metal ions
Microbial ecology
Saturated soils
Soil
Soil Microbiology
Soil Pollutants - adverse effects
Soil Pollutants - pharmacology
Soil solution
Solubility
Speciation
Terrestrial environment, soil, air
Zinc
Zinc - adverse effects
Zinc - pharmacology
title Relationships between Bacterial Tolerance Levels and Forms of Copper and Zinc in Soils
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