Differentiated cognition of the effects of human activities on typical persistent organic pollutants and bacterioplankton community in drinking water source

Environ Res. 2024 Mar 28:118815. doi: 10.1016/j.envres.2024.118815. Online ahead of print.ABSTRACTAccelerated urbanization in developing countries led to a typical gradient of human activities (low, moderate and high human activities), which affected the pollution characteristics and ecological functions of water to varying degrees. However, the characteristics of the occurrence of typical persistent organic pollutants, including organochlorine pesticides (OCPs) and polycyclic aromatic hydrocarbons (PAHs), and bacterioplankton associated with the gradient of human activities in drinking water sources have been lacking. Our study focused on a representative case - the upper reaches of the Dongjiang River (Pearl River Basin, China), a drinking water source characterized by a gradient of human activities. A comprehensive analysis of PAHs, OCPs and bacterioplankton was performed using gas chromatography-mass spectrometry (GC-MS) and the Illumina platform. Moderate human activity could increase pollution from OCPs and PAHs due to local agricultural activities. The gradient of human activities obviously influenced the bacterioplankton community composition and interaction dynamics. Low human activity resulted in low bacterioplankton diversity. Co-occurrence network analysis indicated thunder moderate human activity could promote a more modular organization of the bacterioplankton community. The structural equation model showed that nutrients can exert a negative influence on the co...
Source: Environmental Research - Category: Environmental Health Authors: Source Type: research