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Multiple biomarker responses in caged benthic gastropods

Qian Li1, Meng Wang1, Lei Duan1

  • 11State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China.

Environmental Sciences Europe
|September 18, 2018
PubMed
Summary

Freshwater sediments in Taihu Lake are contaminated with pollutants. Snails exposed to these sediments showed significant stress, indicating a potential biomonitoring tool for environmental contaminants.

Keywords:
Bellamya aeruginosaBiomonitoringCaged organismsFreshwater sediment

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Area of Science:

  • Environmental Science
  • Ecotoxicology
  • Biomonitoring

Background:

  • Freshwater sediments act as sinks and sources for aquatic pollutants.
  • Taihu Lake sediments are susceptible to anthropogenic contamination.
  • Assessing sediment quality is crucial for aquatic ecosystem health.

Purpose of the Study:

  • To evaluate the sediment quality of Taihu Lake using chemical and biological endpoints.
  • To assess the impact of sediment contamination on the snail Bellamya aeruginosa.
  • To determine the applicability of biomonitoring for complex environmental exposure.

Main Methods:

  • Caging the snail Bellamya aeruginosa in situ at two pollution levels for 7, 14, and 21 days.
  • Analyzing biochemical parameters in snail hepatopancreas: EROD, antioxidant enzymes, ROS, protein carbonyl, and lipid peroxidation.
  • Collecting surface sediments for analysis of trace elements, organochlorine pesticides, PCBs, and PBDEs.

Main Results:

  • Taihu Lake sediments contained elevated levels of trace elements (Cu, Ni, As) and 4,4'-DDE, exceeding threshold effect levels.
  • Most biomarkers were induced in snails, with significant environmental stress observed at 7 days, diminishing over time.
  • The integrated biomarker response index (IBR) correlated with contaminant levels.

Conclusions:

  • The integrated biomarker response index (IBR) effectively reflects environmental contaminant levels.
  • Biomonitoring using Bellamya aeruginosa is applicable for assessing complex environmental exposure scenarios in aquatic ecosystems.
  • Sediment contamination in Taihu Lake poses a risk to aquatic life, necessitating further management strategies.