Journal
CHEMOSPHERE
Volume 172, Issue -, Pages 201-209Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2016.12.117
Keywords
Next generation sequencing; Ecogenomics; Protozoa; Biomonitoring; Asia; Rivers
Categories
Funding
- Major Science and Technology Program for Water Pollution Control and Treatment [2012ZX07506-003, 2012ZX07101-007-01]
- Jiangsu Province Funds for Distinguished Young Scientists [BK20130015]
- Fundamental Research Funds for the Central Universities
- Collaborative Innovation Center for Regional Environmental Quality
- State Administration of Foreign Experts Affairs, the P.R. China [GDT20143200016]
- Einstein Professor Program of the Chinese Academy of Sciences
- Canada Research Chair program
- Distinguished Visiting Professorship in the School of Biological Sciences of the University of Hong Kong
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Land-use intensification threatens freshwater biodiversity. Freshwater eukaryotic communities are affected by multiple chemical contaminants with a land-use specific manner. However, biodiversities of eukaryotes and their associations with multiple chemical contaminants are largely unknown. This study characterized in situ eukaryotic communities in sediments exposed to mixtures of chemical contaminants and assessed relationships between various environmental variables and eukaryotic communities in sediments from the Nanfei River. Eukaryotic communities in the sediment samples were dominated by Annelida, Arthropoda, Rotifera, Ochrophyta, Chlorophyta and Ciliophora. Alpha-diversities (Shannon entropy) and structures of eukaryotic communities were significantly different between land-use types. According to the results of multiple statistical tests (PCoA, distLM, Mantel and network analysis), dissimilarity of eukaryotic community structures revealed the key effects of pyrethroid insecticides, manganese, zinc, lead, chromium and polycyclic aromatic hydrocarbons (PAHs) on eukaryotic communities in the sediment samples from the Nanfei River. Furthermore, taxa associated with land-use types were identified and several sensitive eukaryotic taxa to some of the primary contaminants were identified as potential indicators to monitor effects of the primary chemical contaminants. Overall, environmental DNA metabarcoding on in situ eukaryotic communities provided a powerful tool for biomonitoring and identifying primary contaminants and their complex effects on benthic eukaryotic communities in freshwater sediments. (C) 2016 Elsevier Ltd. All rights reserved.
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