Suitability of soil microbial parameters as indicators of heavy metal pollution

被引：22

作者：

Castaldi S. ^{[1
]}

Rutigliano F.A. ^{[1
]}

Virzo De Santo A. ^{[2
]}

机构：

[1] Dipartimento di Scienze Ambientali, Seconda Università di Napoli, 81100 Caserta

[2] Dipartimento di Biologia Vegetale, Univ. Studi di Napoli Federico II, Via Foria 223, 80139 Napoli, Italy

来源：

Water, Air, and Soil Pollution | 2004年 / 158卷 / 01期

关键词：

biomarkers; heavy metals; microbial activity; microbial biomass; pollution; soil;

D O I：

10.1023/B:WATE.0000044824.88079.d9

中图分类号：

学科分类号：

摘要：

Several microbial parameters (microbial biomass, respiration, dehydrogenase, phosphatase, sulphatase, glucosidase, protease and urease activities) were measured in soils from five sites located in urban green areas close to roads differing in traffic density. Our aims were to evaluate the suitability of such parameters as field biomarkers of stress induced by heavy metal pollution, and to compare results obtained by single microbial parameters with results given by an index expressing the average microbial (AME) response of the microbial community. Data showed that all parameters were significantly reduced in the sites characterized by the highest load of metals in soil. Dehydrogenase, sulphatase, glucosidase activities and respiration, declined exponentially with increasing metal concentration, whereas phosphatase activity and AME decreased following a sigmoidal type relationship. In contrast, protease, urease and microbial biomass were not significantly correlated with soil metal concentration. Microbial parameters differed both in sensitivity to critical metal concentrations and in the rate of decline at increasing metal loads in soil. Due to the complex interplay of chemical, physical and biological factors which influence microbial activities and biomass, the proposed index (AME) appeared more suitable than single microbial parameters for a biomonitoring study of this type.

引用

页码：21 / 35

页数：14

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