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Evaluating Insects as Bioindicators of Heavy Metal Contamination and Accumulation near Industrial Area of Gujrat, Pakistan.

Azam I, Afsheen S, Zia A, Javed M, Saeed R, Sarwar MK, Munir B - Biomed Res Int (2015)

Bottom Line: To study the accumulation and contamination of heavy metals (i.e., Cd, Cr, Cu, Ni, and Zn) in soil, air, and water, few insect species were assayed as ecological indicators.Hierarchical cluster analysis (HACA) was carried out to study metal accumulation level in all insects.Metal concentrations in insects were significantly higher near industries and nallahs in Gujrat and relatively higher concentrations of metals were found in Orthoptera than Odonata and Lepidoptera.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, Institute of Life Sciences, University of Gujrat, Punjab 50700, Pakistan.

ABSTRACT
To study the accumulation and contamination of heavy metals (i.e., Cd, Cr, Cu, Ni, and Zn) in soil, air, and water, few insect species were assayed as ecological indicators. Study area comes under industrial zone of district Gujrat of Punjab, Pakistan. Insects used as bioindicators included a libellulid dragonfly (Crocothemis servilia), an acridid grasshopper (Oxya hyla hyla), and a nymphalid butterfly (Danaus chrysippus) near industrial zone of Gujrat. Accumulation of Cd was highest in insect species followed by Cu, Cr, Zn, and Ni at p < 0.05. Hierarchical cluster analysis (HACA) was carried out to study metal accumulation level in all insects. Correlation and regression analysis confirmed HACA observations and declared concentration of heavy metals above permissible limits. Metal concentrations in insects were significantly higher near industries and nallahs in Gujrat and relatively higher concentrations of metals were found in Orthoptera than Odonata and Lepidoptera. The total metal concentrations in insects were pointed significantly higher at sites S3 (Mid of HalsiNala), S9 (End of HalsiNala), and S1 (Start of HalsiNala), whereas lowest value was detected at site S6 (Kalra Khasa) located far from industrial area. HACA indicates that these insect groups are potential indicators of metal contamination and can be used in biomonitoring.

No MeSH data available.


Related in: MedlinePlus

Map showing sampling sites (Arc GIS 9.3).
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fig1: Map showing sampling sites (Arc GIS 9.3).

Mentions: Survey to study heavy metal contamination was carried out during September 2013 to August 2014 in nine localities (Start of HalsiNala (S1), Kalra Punwan (S2), Mid of HalsiNala (S3), Small Industrial Area (S4), Kalra Kalan (S5), Kalra Khasa (S6), Kathala Chenab (S7), Near Chenab River (S8), and End of Nala (S9)) of Tehsil Gujrat (Figure 1). Details regarding coordinates and vegetation cover at each sampling site are shown in Table 1. Sites were selected at nearest possible distance to the functioning industrial units. Three insects groups were chosen to be used as bioindicators. It included a libellulid dragonfly (Crocothemis servilia), a nymphalid butterfly (Danaus chrysippus), and an acridid grasshopper (Oxya hyla hyla). These were collected from rice and wheat crops on quarterly basis for a period of one year. Three specimens of each group were recorded from each site so the total number of specimens (sample size) becomes twenty-seven for each species (Table 2). Soil and plant samples were also collected from same sites and stored in sterilized polythene bags until reaching laboratory. Represented specimens of each group were sent to National Insect Museum, NARC, Islamabad for taxonomic confirmation.


Evaluating Insects as Bioindicators of Heavy Metal Contamination and Accumulation near Industrial Area of Gujrat, Pakistan.

Azam I, Afsheen S, Zia A, Javed M, Saeed R, Sarwar MK, Munir B - Biomed Res Int (2015)

Map showing sampling sites (Arc GIS 9.3).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4488521&req=5

fig1: Map showing sampling sites (Arc GIS 9.3).
Mentions: Survey to study heavy metal contamination was carried out during September 2013 to August 2014 in nine localities (Start of HalsiNala (S1), Kalra Punwan (S2), Mid of HalsiNala (S3), Small Industrial Area (S4), Kalra Kalan (S5), Kalra Khasa (S6), Kathala Chenab (S7), Near Chenab River (S8), and End of Nala (S9)) of Tehsil Gujrat (Figure 1). Details regarding coordinates and vegetation cover at each sampling site are shown in Table 1. Sites were selected at nearest possible distance to the functioning industrial units. Three insects groups were chosen to be used as bioindicators. It included a libellulid dragonfly (Crocothemis servilia), a nymphalid butterfly (Danaus chrysippus), and an acridid grasshopper (Oxya hyla hyla). These were collected from rice and wheat crops on quarterly basis for a period of one year. Three specimens of each group were recorded from each site so the total number of specimens (sample size) becomes twenty-seven for each species (Table 2). Soil and plant samples were also collected from same sites and stored in sterilized polythene bags until reaching laboratory. Represented specimens of each group were sent to National Insect Museum, NARC, Islamabad for taxonomic confirmation.

Bottom Line: To study the accumulation and contamination of heavy metals (i.e., Cd, Cr, Cu, Ni, and Zn) in soil, air, and water, few insect species were assayed as ecological indicators.Hierarchical cluster analysis (HACA) was carried out to study metal accumulation level in all insects.Metal concentrations in insects were significantly higher near industries and nallahs in Gujrat and relatively higher concentrations of metals were found in Orthoptera than Odonata and Lepidoptera.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, Institute of Life Sciences, University of Gujrat, Punjab 50700, Pakistan.

ABSTRACT
To study the accumulation and contamination of heavy metals (i.e., Cd, Cr, Cu, Ni, and Zn) in soil, air, and water, few insect species were assayed as ecological indicators. Study area comes under industrial zone of district Gujrat of Punjab, Pakistan. Insects used as bioindicators included a libellulid dragonfly (Crocothemis servilia), an acridid grasshopper (Oxya hyla hyla), and a nymphalid butterfly (Danaus chrysippus) near industrial zone of Gujrat. Accumulation of Cd was highest in insect species followed by Cu, Cr, Zn, and Ni at p < 0.05. Hierarchical cluster analysis (HACA) was carried out to study metal accumulation level in all insects. Correlation and regression analysis confirmed HACA observations and declared concentration of heavy metals above permissible limits. Metal concentrations in insects were significantly higher near industries and nallahs in Gujrat and relatively higher concentrations of metals were found in Orthoptera than Odonata and Lepidoptera. The total metal concentrations in insects were pointed significantly higher at sites S3 (Mid of HalsiNala), S9 (End of HalsiNala), and S1 (Start of HalsiNala), whereas lowest value was detected at site S6 (Kalra Khasa) located far from industrial area. HACA indicates that these insect groups are potential indicators of metal contamination and can be used in biomonitoring.

No MeSH data available.


Related in: MedlinePlus