Living in a post‐industrial landscape: repeated patterns of genetic divergence in brown trout (Salmo trutta L.) across the British Isles

Diversity and Distributions, Journal Year: 2024, Volume and Issue: 30(7)

Published: May 31, 2024

Abstract Aim The British Isles have been worked for millennia to extract metal ores feed industrial development, leaving a legacy of mine water pollution that continues impact freshwater communities in many regions. Brown trout ( Salmo trutta L.) long observed persist these metal‐impacted systems as apex predators, with previous studies showing small number impacted populations be highly genetically divergent. We sought understand the scale genetic diversity across regions and repeatability divergence affected by pollution. Location examined four water‐impacted Isles: west Wales, northeast England, southwest England southeast Ireland. Methods employed panel 95 SNP loci screen 1236 individuals from 71 sites representing paired clean From these, we obtained statistics, assessed structuring modelled historical demographic scenarios which factors most credibly explain variation divergent populations. Results evidenced hierarchical population structure studied, line expectations phylogeographic history. However, analysis first level differentiation was driven Cornwall England. Within reduced repeated patterns local sub‐structuring between samples relatively sites. Demographic history analyses suggested timing splits recent associated periods peak mining activity. Main conclusions Our findings demonstrate distinct isolation arising ecosystems, impacts being apparent where both chemical physical barriers are present. Management should focus on amelioration wash‐out removal fish movement safeguard

Language: Английский

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The ‘other rainforest’: restoring Britain’s green gem

Geography, Journal Year: 2025, Volume and Issue: 110(1), P. 34 - 38

Published: Jan. 2, 2025

Language: Английский

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A New Hotspot of Salmonid Adaptive Radiation Revealed: Multiple Diversifications of Salvelinus malma (Salmonidae) Sharing Freshwater Habitats in Kamchatka

Journal of Ichthyology, Journal Year: 2025, Volume and Issue: unknown

Published: March 31, 2025

Language: Английский

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Genomic underpinnings of head and body shape in Arctic charr ecomorph pairs

Molecular Ecology, Journal Year: 2024, Volume and Issue: 33(7)

Published: Feb. 29, 2024

Abstract Across its Holarctic range, Arctic charr ( Salvelinus alpinus ) populations have diverged into distinct trophic specialists across independent replicate lakes. The major aspect of divergence between ecomorphs is in head shape and body shape, which are ecomorphological traits reflecting niche use. However, whether the genomic underpinnings these parallel divergences consistent replicates was unknown but key for resolving substrate evolution. We investigated basis morphology four benthivore–planktivore ecomorph pairs Scotland. Through genome‐wide association analyses, we found regions associated with (89 SNPs) or (180 separately 50 SNPs were strongly both morphology. For each trait separately, only a small number shared all (3 10 shape). Signs selection on varied pairs, evolutionary demography differing considerably Using comprehensive database salmonid QTLs newly augmented mapped to genome, several head‐ body‐shape‐associated within near from other species, genetic phenotypes species. Overall, our results demonstrate how ecotype can population‐specific deeply replicates, influenced by differences their environments demographic histories.

Language: Английский

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Environmental correlates of adaptive diversification in postglacial freshwater fishes

Journal of Fish Biology, Journal Year: 2023, Volume and Issue: 104(3), P. 517 - 535

Published: Nov. 21, 2023

Determining how environmental conditions contribute to divergence among populations and drive speciation is fundamental resolving mechanisms understanding outcomes in evolutionary biology. Postglacial freshwater fish species the Northern Hemisphere are ideal biological systems explore effects of environment on diversification morphology, ecology, genetics (ecomorph divergences) within lakes. To date, various factors have been implicated presence multiple ecomorphs particular lakes or regions. However, concerted evidence for generalizable patterns variables associated with across geographical regions genera has lacking. Here, we aimed identify key biotic abiotic ecological postglacial into sympatric ecomorphs, focusing well-studied, widespread, co-distributed Gasterosteus, Salvelinus, Coregonus (stickleback, charr, whitefish, respectively). We found that tended be increasing lake surface area, maximum depth, nutrient availability. In addition, predation, competition, prey availability were suggested play a role but require further study. Although identified several correlated there substantial data gaps An improved these may provide insight both involved other systems, potential responses complexes when altered by change.

Language: Английский

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Ecological opportunity leads to higher diversity and probability of trophic specialisation in Arctic charr

Evolutionary Journal of the Linnean Society, Journal Year: 2024, Volume and Issue: 3(1)

Published: Jan. 1, 2024

Abstract Understanding the extrinsic factors that drive emergence of biological diversity is critical to its protection and management. However, even superficially similar local environments can vary considerably, so large-scale datasets are needed understand key drivers across a representative portion species distribution. Arctic charr (Salvelinus alpinus) widespread salmonid fish represents an excellent study system for these processes because shows substantial diversification range freshwater multiple instances trophic specialization in form sympatric ecotype populations. behind this variation remain largely unknown due lack broad-scale studies. To address this, we investigated via national-scale 64 populations lakes Scotland using genome-wide dataset single nucleotide polymorphisms (N = 24 878) phenotypic data head depth relative body size. We found extent genetic was predicted by ecosystem size (a proxy lake size, depth, complexity). suggest larger, deeper generally provided more ecological opportunity potential. Additionally, environmental from all 187 containing Scotland, strongly potential presence divergent ecotypes. Our results show importance underlying adaptive radiations.

Language: Английский

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The Marion Newbigin Prize 2024 for contributions to the Scottish Geographical Journal in 2023

Scottish Geographical Journal, Journal Year: 2024, Volume and Issue: 140(3-4), P. 329 - 332

Published: Oct. 1, 2024

Language: Английский

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