Habitat recovery from diverted acid mine drainage pollution determined by increased biodiversity of river and estuarine benthic species

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 966, P. 178726 - 178726

Published: Feb. 1, 2025

Acid mine drainage (AMD) is a frequent cause of ecological damage to many river and estuarine habitats. Once AMD pollution halted our understanding subsequent habitat recovery requires long-term assessment. This study examines the consequences diverting away from highly contaminated estuary using water quality data pre- post-diversion sample periods. 10-12 years following diversion, benthic macroinvertebrate biodiversity significantly improved at all sites river, indicative but upstream that were closer source less improved. However, redirection into nearby stream channel caused an almost complete loss macroinvertebrates. Habitat was demonstrated by increased richness infaunal invertebrates rocky shore species, including crustaceans, barnacles mollusc species. Measurements copper bioaccumulation in barnacle Austrominius modestus showed significant reduction present day samples compared those collected before diversion. shows within decade, system can demonstrate pollution, yet this time period, did not fully match uncontaminated sites.

Language: Английский

Leveraging the genetic diversity of trout in the rivers of the British Isles and northern France to understand the movements of sea trout (Salmo trutta L.) around the English Channel

Evolutionary Applications, Journal Year: 2024, Volume and Issue: 17(7)

Published: July 1, 2024

Abstract Populations of anadromous brown trout, also known as sea have suffered recent marked declines in abundance due to multiple factors, including climate change and human activities. While much is about their freshwater phase, less the species' marine feeding migrations. This situation hindering effective management conservation trout environment. Using a panel 95 single nucleotide polymorphism markers we developed genetic baseline, which demonstrated strong regional structuring diversity populations around English Channel adjacent waters. Extensive baseline testing showed this allowed high‐confidence assignment known‐origin individuals region origin. study presents new data on movements southern North Sea. Assignment sampled from 12 estuarine localities highlighted contrasting results for these areas. The majority fisheries are composed predominately stocks local sampling location. However, there were cases long‐distance with several originating rivers northeast England being caught Sea, some more than 1000 km natal region. These implications inshore waters

Language: Английский

The Genomic Signature and Transcriptional Response of Metal Tolerance in Brown Trout Inhabiting Metal‐Polluted Rivers

Molecular Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

ABSTRACT Industrial pollution is a major driver of ecosystem degradation, but it can also act as contemporary evolution. As result intense mining activity during the Revolution, several rivers across southwest England are polluted with high concentrations metals. Despite documented negative impacts ongoing metal pollution, brown trout ( Salmo trutta L.) survive and thrive in many these metal‐impacted rivers. We used population genomics, transcriptomics, burdens to investigate genomic transcriptomic signatures potential tolerance. RADseq analysis six populations (originating from three control rivers) revealed strong genetic substructuring between impacted populations. identified selection at 122 loci, including genes related homeostasis oxidative stress. Trout sampled exhibited significantly higher tissue cadmium, copper, nickel zinc, which remained elevated after 11 days metal‐free water. After depuration, we RNAseq quantify gene expression differences trout, identifying 2042 differentially expressed (DEGs) gill, 311 DEGs liver. Transcriptomic gill were enriched for involved ion transport processes, homeostasis, stress, hypoxia, response xenobiotics. Our findings reveal shared pathways detoxification, stress responses regulation. Overall, our results demonstrate diverse effects shaping both neutral adaptive variation, whilst highlighting role constitutive promoting

Language: Английский