RT Journal Article
SR Electronic
T1 Differential biotransformation ability may alter fish biodiversity in polluted waters
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2024.07.26.605280
DO 10.1101/2024.07.26.605280
A1 Franco, Marco E.
A1 Hollender, Juliane
A1 Schirmer, Kristin
YR 2024
UL http://biorxiv.org/content/early/2024/07/26/2024.07.26.605280.abstract
AB Divergence in the activity of biotransformation pathways could lead to species sensitivity differences to chemical stress. To explore this hypothesis, we evaluated the biotransformation capacity of five fish species that are representatives of Swiss biodiversity assemblages and that inhabit watercourses surrounded by different land use. We report important interspecific differences regarding the presence and activity of major biotransformation pathways, such as the invasive pumpinkseed (Lepomis gibbosus) displaying micropollutant clearance between 3- and 7–fold higher than native species (e.g. Salmo trutta, Squalius cephalus) collected in the same areas. These differences were exacerbated by urban and agricultural influence, which increased biotransformation potential at the enzyme level by as much as 11-fold and micropollutant clearance by approximately 2-fold compared to biotransformation levels in areas with minimal human influence. In the context of the chemical defensome, we argue that fish with low biotransformation activity carry a greater burden on chemical stress, making them less likely to cope with additional stressors and sustain their population in competition with species with a higher biotransformation capacity.Competing Interest StatementThe authors have declared no competing interest.