Heavy metal resistance of marine bacteria on the sediments of the Black Sea

Kalkan S.

MARINE POLLUTION BULLETIN, vol.179, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 179
  • Publication Date: 2022
  • Doi Number: 10.1016/j.marpolbul.2022.113652
  • Journal Name: MARINE POLLUTION BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, BIOSIS, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, EMBASE, Environment Index, Geobase, MEDLINE, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Heterotrophic bacteria, Marine sediment, Minimum inhibitory concentration (MIC), Heavy metal contamination, Heavy metal resistance, Black Sea, ANTIBIOTIC-RESISTANCE, PARTICULATE MATTER, SURFACE SEDIMENTS, ESCHERICHIA-COLI, ECOLOGICAL RISK, SINOP COASTS, POLLUTION, WATER, ACCUMULATION, GIRESUN
  • Recep Tayyip Erdoğan University Affiliated: Yes

Abstract

The Black Sea is unfortunately globally established as a highly polluted sea, with contaminants from various sources polluting its marine sediments. This study aimed at analyzing heavy metal resistance levels by heterotrophic bacteria colonizing marine sediments across Black Sea shores within Turkey. Twenty-nine bacterial samples from marine sediments were investigated through exposure to sixteen heavy metal salts using the microdilution method. The minimum inhibitory concentration values for bacterial colonies within such marine sediment samples ranged from <0.97 mM/L to >1000 mM/L. Trough and peak minimum inhibitory concentration values were determined at <0.17 mg/mL and > 331 mg/mL. Peak tolerated and peak toxic heavy metals were identified as iron and cadmium, respectively. Resistance ratios were also obtained in this study. Bacillus wiedmannii was identified as the most resistant bacterial population when exposed to heavy metal salts. This study shows occurrence of heavy metal resistant bacteria within Black Sea sediments.