80 years later: Marine sediments still influenced by an old war ship

Abstract

Historic shipwrecks form an anthropogenic landmark in marine environment, yet their influence on the local geochemistry and microbiology remains largely unexplored. In this study, sediment and steel hull samples were taken around the V-1302 John Mahn, a World War II shipwreck, at increasing distance from the wreck, in different directions. Polycyclic aromatic hydrocarbons (PAH’s), explosives, and heavy metal levels were determined and related to the microbial composition. Benz(a)anthracene and fluoranthene remain present at the mg kg-1 level, probably originating from the coal bunker. These PAH’s indicate that the wreck is still influencing the surrounding sediments however the effects are very dependent on which side of the wreck is being studied. Known PAH degrading taxa like Rhodobacteraceae and Chromatiaceae were more abundant in samples with high aromatic pollutant content. Moreover, sulphate reducing bacteria (such as Desulfobulbia), proven to be involved in steel corrosion, were found present in the biofilm. This study shows that even after 80 years, a historic shipwreck can still significantly steer the surrounding sediment chemistry and microbial ecology.

Impact of operational conditions on drinking water biofilm dynamics and coliform invasion potential

“…DNA extraction was performed using the DNeasy PowerSoilPro kit (Qiagen, Germany), following the manufacturer’s protocol. PCR amplification was performed according to Van Landuyt et al ( 65 ) (see supplementary methods for details). About 10 µL genomic DNA extract was sent out to LGC Genomics GmbH (Berlin, Germany) for library preparation and sequencing on an Illumina Miseq platform with v3 chemistry (Illumina, USA).…”

Impact of operational conditions on drinking water biofilm dynamics and coliform invasion potential

“…DNA extraction was performed using the DNeasy PowerSoilPro kit (Qiagen, Germany), following the manufacturer’s protocol. PCR amplification was performed according to Van Landuyt et al (65) (see supplementary methods for details). 10 µL genomic DNA extract was send out to LGC genomics GmbH (Berlin, Germany) for library preparation and sequencing on an Illumina Miseq platform with v3 chemistry (Illumina, USA).…”

Granular activated carbon stimulates biogas production in pilot-scale anaerobic digester treating agro-industrial wastewater

“…The amplicon sequence data were processed using the DADA2 R package according to the pipeline tutorial (Callahan et al, 2016). The detailed description of amplicon sequencing as well as amplicon sequencing data processing are described in a previous work (Van Landuyt et al, 2022). The fastq files obtained from this study were submitted to the National Center for Biotechnology Information (NCBI) under the Accession number SRP414262.…”