Population genetics of the indicator amphipod species Gammarus pulex (Linnaeus, 1758) in relation to anthropogenic organic micropollutants in rivers DOI Open Access
Vid Švara

Published: Jan. 1, 2022

Chemical pollution is one of the main contributors to degradation lotic ecosystems and their biodiversity. Among chemicals driving biodiversity decline are anthropogenic organic micropollutants (AOM), which affect survival functioning freshwater organisms. Continuous exposure organisms AOM leads adverse effects that sometimes cannot be traced with standard toxicity methods such as testing or indices. these selective mutagenic cause impaired species genetic diversity. Thus, correlation between different levels diversity still poorly understood. However, it can explored by applying population genetics screening. In Chapter 1 this thesis, background information on environmental pollution, screening, detection evolutionary-relevant in described thesis goals identified. The goal study whether occurring European rivers causes a significant evolutionary footprint selection more tolerant geno-and phenotypes. Therefore, indices together high-resolution chemical screening widespread indicator invertebrate species, Gammarus pulex (Linnaeus, 1758), living polluted pristine were investigated. 2, development method for G. (microsatellites) described. Due differentiation presence morphologically cryptic lineages, available sets target loci do not enable reliable characterization from central Germany. novel set microsatellite high-precision assessment was here applied. Eleven first identified thereafter amplified three rivers. new reliably indicated polymorphisms studied amphipods. amplification resulted successful identification genetically distinct populations analyzed Moreover, other lineages another fossarum, promising broader applicability related amphipod species. 3, sensitivity toxic typical river AOM-polluted sections river’s site-specific concentrations assessed analysis tissue water samples. To test, select pollution-dependent genotypes, structure analyzed. Finally, toxicokinetics commonly used insecticide imidacloprid determined amphipods sampled at assess various influence imidacloprid. results did drive divergence within but led an increased exposed sensitive due chronic AOM. 4, relationship parameters regional scale six area tested relatedness waterway distance sites. parameters, including allelic richness inbreeding rate, against using linear mixed-effect- structural-equation models. According results, significantly associated detected levels. At sites high potential showed reduced rates inbreeding. These suggest play major role shaping findings presented here, applied microsatellites successfully detect changes patterns facing indicate representative lead separation genotypes among connectivity majorly contributes species’ structure. reduction increases effects.

Language: Английский

What are a source and a sink under ecological and evolutionary perspectives? DOI
Marisa Novaes, Alessandra Bertassoni, Paulo de Marco Júnior

et al.

Biological Journal of the Linnean Society, Journal Year: 2023, Volume and Issue: 142(2), P. 233 - 245

Published: Oct. 6, 2023

Abstract Source–sink dynamics investigates species dispersal, mainly at the landscape scale, providing outcomes for conservation problem-solving. Designing plans requires accurately identifying a source or sink habitat within landscape. However, this practical use demands theoretical background and clear definition of its successful implementation. This study application terms sink, examining how biological features affect their use, if they have been consistently applied in published studies. We conducted systematic review focused on source–sink performed descriptive textual analysis to understand application. Most research did not expressly state what was, leaving knowledge gap that prevents complete understanding The concept has different uses is better detailed than term sink. concepts was taxon-dependent; animal requirements are needed indicate population/habitat can play role as Because these were being used differently, terminology hinders fundamental theory, evolutionary perspectives, applicability conservation, especially tropics, where significant information found.

Language: Английский

Citations

1
Population genetics of the indicator amphipod species Gammarus pulex (Linnaeus, 1758) in relation to anthropogenic organic micropollutants in rivers DOI Open Access
Vid Švara

Published: Jan. 1, 2022

Chemical pollution is one of the main contributors to degradation lotic ecosystems and their biodiversity. Among chemicals driving biodiversity decline are anthropogenic organic micropollutants (AOM), which affect survival functioning freshwater organisms. Continuous exposure organisms AOM leads adverse effects that sometimes cannot be traced with standard toxicity methods such as testing or indices. these selective mutagenic cause impaired species genetic diversity. Thus, correlation between different levels diversity still poorly understood. However, it can explored by applying population genetics screening. In Chapter 1 this thesis, background information on environmental pollution, screening, detection evolutionary-relevant in described thesis goals identified. The goal study whether occurring European rivers causes a significant evolutionary footprint selection more tolerant geno-and phenotypes. Therefore, indices together high-resolution chemical screening widespread indicator invertebrate species, Gammarus pulex (Linnaeus, 1758), living polluted pristine were investigated. 2, development method for G. (microsatellites) described. Due differentiation presence morphologically cryptic lineages, available sets target loci do not enable reliable characterization from central Germany. novel set microsatellite high-precision assessment was here applied. Eleven first identified thereafter amplified three rivers. new reliably indicated polymorphisms studied amphipods. amplification resulted successful identification genetically distinct populations analyzed Moreover, other lineages another fossarum, promising broader applicability related amphipod species. 3, sensitivity toxic typical river AOM-polluted sections river’s site-specific concentrations assessed analysis tissue water samples. To test, select pollution-dependent genotypes, structure analyzed. Finally, toxicokinetics commonly used insecticide imidacloprid determined amphipods sampled at assess various influence imidacloprid. results did drive divergence within but led an increased exposed sensitive due chronic AOM. 4, relationship parameters regional scale six area tested relatedness waterway distance sites. parameters, including allelic richness inbreeding rate, against using linear mixed-effect- structural-equation models. According results, significantly associated detected levels. At sites high potential showed reduced rates inbreeding. These suggest play major role shaping findings presented here, applied microsatellites successfully detect changes patterns facing indicate representative lead separation genotypes among connectivity majorly contributes species’ structure. reduction increases effects.

Language: Английский

Citations

0