Overview
Research conducted by Kyushu University has investigated the biological effects of expanded polystyrene (EPS) consumption on wharf roaches, a common shoreline scavenger. The study, published in the journal Marine Pollution Bulletin, focused on physiological and genetic responses within the organisms after dietary exposure to plastic foam.
Approach
The research involved feeding wharf roaches, identified as common shoreline scavengers, with expanded polystyrene (EPS). Subsequent analysis focused on assessing the organisms' lifespan, examining gene expression within their guts, and characterizing changes in their gut microbiome. This methodology aimed to identify specific biological consequences of ingesting the plastic material.
Findings
- Wharf roaches that consumed expanded polystyrene (EPS) did not exhibit a significant reduction in their lifespan.
- Analysis of the gut tissue in EPS-fed roaches revealed altered expression of genes. These genes are implicated in several biological processes, including chemical defense mechanisms, DNA repair pathways, and digestive functions.
- Examination of the wharf roach gut microbiome indicated minimal overall change in its composition.
- However, the study identified the presence of several rare microbial species exclusively within the gut microbiome of specimens that had been fed EPS.
Why This Matters
The observation of altered gene expression in chemical defense, DNA repair, and digestion pathways, alongside the presence of unique rare microbes in the gut microbiome of wharf roaches after consuming EPS, provides specific insights into the biological interactions between a common shoreline scavenger and plastic pollutants. This study contributes to understanding organismal responses to plastic ingestion at genetic and microbial levels.
Research Source
Kyushu University