Background: Chemical dissipation and organism immigration are considered important factors that influence recovery potential from perturbation of aquatic macroinvertebrates. Experiments were conducted to investigate the effect of simulated immigration on recovery of aquatic macroinvertebrates exposed in outdoor microcosms to ecotoxicologically similar concentrations of the rapidly dissipating pyrethroid insecticide cypermethrin (70 ng L(-1)) or the more persistent herbicide intermediate and degradate 3,4-dichloroaniline (10 mg L(-1)). Microcosms were covered with light-permeable mesh to prevent recolonisation. Immigration was simulated by the regular addition of organisms after treatment.
Results: Microcosms exposed to 3,4-dichloroaniline treatment suffered substantial loss of taxon richness and by 10 months after treatment had only recovered where invertebrates had been added. Those treated with cypermethrin underwent an initial decline in certain crustacean and insect populations. These populations showed some signs of recovery over a period of 5 months through internal processes alone. However, rate of recovery was further enhanced where immigration was simulated, and in this case recovery had occurred around 100 days after treatment.
Conclusion: Although not the only factors involved, simulated immigration and chemical fate clearly influence the ability of communities to recover from chemical exposure. Consideration of immigration processes and development of models will help to increase the realism of risk assessments.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/ps.1745 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
East London Project: a participatory mixed-method evaluation on how removing enforcement could affect sex workers' safety, health and access to services in East London.
Public Health Res (Southampt)
September 2024
Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK.
Background: Sex workers' risk of violence and ill-health is shaped by their work environments, community and structural factors, including criminalisation.
Aim: We evaluated the impact of removing police enforcement on sex workers' safety, health and access to services.
Design: Mixed-methods participatory study comprising qualitative research, a prospective cohort study, mathematical modelling and routine data collation.
A stage structured model for mosquito suppression with immigration.
Math Biosci Eng
November 2024
School of Statistics and Mathematics, Guangdong University of Finance and Economics, Guangzhou 510320, China.
The incompatible insect technique based on is a promising alternative to control mosquito-borne diseases, such as dengue fever, malaria, and Zika, which drives wild female mosquitoes sterility through a mechanism cytoplasmic incompatibility. A successful control program should be able to withstand the perturbation induced by the immigration of fertilized females from surrounding uncontrolled areas. In this paper, we formulated a system of delay differential equations, including larval and adult stages, interfered by -infected males.
View Article and Find Full Text PDFGenetic Monitoring of a Lethal Control Programme for Wild Canids With Complex Mating Strategies.
Mol Ecol
January 2025
Research, Innovation and Commercialisation, The University of Melbourne, Melbourne, Victoria, Australia.
Although mammalian carnivores are ecologically important, they also drive human-wildlife conflicts. Managing carnivores using lethal control is controversial, in part because the impact of control effort is often uncertain due to limited abundance monitoring. We used an Australian metapopulation of wild dogs as a model system to investigate the feasibility of monitoring effective population size ( ) to detect reductions in census population size ( ) following control.
View Article and Find Full Text PDFEstablishment of a locally adaptive allele in multidimensional continuous space.
G3 (Bethesda)
January 2025
Department of Genomics and Evolutionary Biology, National Institute of Genetics, Mishima, Shizuoka, 411-8540, Japan.
Local adaptation is widely seen when species adapt to spatially heterogeneous environments. Although many theoretical studies have investigated the dynamics of local adaptation using 2-population models, there remains a need to extend the theoretical framework to continuous space settings, reflecting the real habitats of species. In this study, we use a multidimensional continuous space model and mathematically analyze the establishment process of local adaptation, with a specific emphasis on the relative roles of mutation and migration.
View Article and Find Full Text PDFImmigrant birds learn from socially observed differences in payoffs when their environment changes.
PLoS Biol
November 2024
Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland.
Longstanding theory predicts that strategic flexibility in when and how to use social information can help individuals make adaptive decisions, especially when environments are temporally or spatially variable. A short-term increase in reliance on social information under these conditions has been experimentally shown in primates, including humans, but whether this occurs in other taxa is unknown. We asked whether migration between spatially variable environments affected social information use with a large-scale cultural diffusion experiment with wild great tits (Parus major) in captivity, a small passerine bird that can socially learn novel behaviors.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!