Are cockroaches reliable bioindicators of persistent organic pollutant contamination of indoor environments?. (March 2015)

• Record Type: Journal Article
• Authors: Wang, Yan-Bing; Sojinu, Samuel O.; Sun, Jian-Lin; Ni, Hong-Gang; Zeng, Hui; Zou, Mengyao
• Is Part Of: Ecological indicators. Volume 50(2015)
• Page Start: 44
• Page End: 49
• Publication Date: 2015-03
• Subjects: Cockroaches -- Bioindicator -- Indoor pollution -- Polybrominated diphenyl ethers -- Polycyclic aromatic hydrocarbons; Environmental monitoring -- Periodicals; Environmental management -- Periodicals; Environmental impact analysis -- Periodicals; Environmental risk assessment -- Periodicals; Sustainable development -- Periodicals; 333.71405
• DOI: 10.1016/j.ecolind.2014.10.022
• Languages: English
• ISSNs: 1470-160X

Abstract

Highlights: K ow values are crucial to biota-dust accumulation factors of POPs in cockroaches. Halogenated POPs have higher biota-dust accumulation factors in cockroaches. Molecular size is one of important factors affecting the bioaccumulation of POPs. Cockroaches are reliable bioindicators of POPs pollution of indoor environments. Abstract: We measured the concentrations of selected persistent organic pollutants (POPs) such as parent and halogenated polycyclic aromatic hydrocarbons (PAHs and HPAHs) and polybrominated diphenyl ethers (PBDEs) in indoor dust (ID) and indoor cockroach samples collected from Shenzhen, South China. Biota-dust accumulation factors (BDAFs) were computed and utilized to quantify targeted pollutant bioaccumulation in ID and cockroaches. Generally, halogenated compounds have higher BDAFs when compared to non-halogenated compounds. There are significant differences ( p < 0.05) between the BDAFs of non-halogenated POPs (PAHs) and halogenated POPs (HPAHs and PBDEs). Correlation analysis of target pollutants' levels in ID and cockroaches were also conducted. The correlation coefficients for PAHs are less than 0.2 ( p > 0.5) suggesting no significant relationship exists for PAHs between ID and cockroaches. In contrast, significant correlations exist for halogenated POPs (HPAH and PBDE) between ID and cockroaches (correlation coefficients >0.94, p < 0.0001). Based on this, the potential of cockroaches to be used as reliable bioindicators of POPs contamination of indoor environments was preliminarily evaluated. Our results indicate that indoor cockroaches may be useful bioindicator of indoor pollution for HPAHs and PBDEs contaminations.