Global climate change is known to affect physiological processes in charge of cellular stress response. That often results in forcing many organisms to shift their biogeographic distribution ranges. It also holds true for euryoecious and highly invasive species like the killer shrimp, Dikerogammarus villosus. In this study we compare the level of response to thermal stress in two genetically diversified populations of the amphipod D. villosus on the cellular level, namely HSP70 expression. The results show clear difference in HSP70 expression, that can be a direct consequence of the different climatic conditions both populations faced along their invasion routes. We conclude that the eastern population of D. villosus is more sensitive to thermal stress than the western population, hence its invasion potential may be lower than that of the latter. Considering the thermal tolerance of both populations and global warming, we can make some predictions about further spread of D. villosus, including the possibility of an emergence of the super-invader that may arise after cross-breeding of both populations, imposing even larger threat to the freshwater ecosystems.
Hupało, K., Riss, H.W., Grabowsk,i M., Thiel, J., Bącela-Spychalska, K., Meyer, E.I. (2018): Climate change as a possible driver of invasion and differential in HSP70 expression in two genetically distinct populations of the invasive killer shrimp, Dikerogammarus villosus. Biological Invasions, https://doi.org/10.1007/s10530-018-1679-2
"Variation in behaviour among group members often impacts collective outcomes. Individuals may vary both in the task that they perform and in the persistence with which they perform each task. Although both the distribution of individuals among tasks and differences among individuals in behavioural persistence can each impact collective behaviour, we do not know if and how they jointly affect collective outcomes…..Our work provides new insights and generates new hypotheses into how variations in behaviour at both the individual and colony levels jointly impact the trade-off between exploring for new resources and exploiting familiar ones."
Mosqueiro, T., Cook, C., Huerta, R., Gadau, J., Smith, B., & Pinter-Wollman, N. (2017). Task allocation and site fidelity jointly influence foraging regulation in honeybee colonies. Royal Society Open Science, 4(8). DOI: 10.1098/rsos.170344
Am 23.06.2017 fand zum zweiten Mal die Veranstaltung "Biodiversität unter Wasser“ in Kooperation mit dem Institut für Evolution und Biodiversität, Abteilung für Limnologie der Westfälischen Wilhelms- Universität Münster (WWU) und dem Landesfischereiverband Westfalen und Lippe e.V. (LFV) im Blauen Klassenzimmer in Münster statt. Prof. Dr. E. Meyer hielt im Rahmen der Veranstaltung einen Vortag mit dem Titel "Welche Tiere leben unter Wasser? Die heimische Gewässerfauna im Überblick".
Weitere Informationen finden Sie auf der Seite der Natur – und Umweltschutz-Akademie NRW.
On 23. June 2017 the second "Biodiversität unter Wasser" workshop was held an organized in cooperation with the Limnology Group of the Instutute for Evolution and Biodiversity and the Landesfischereiverband Westfalen und Lippe e.V. (LFV). Prof. Dr. E. Meyer gave a talk on the topic of biodiveryity under water titled "Welche Tiere leben unter Wasser? Die heimische Gewässerfauna im Überblick".
For more informations visit the page of the Natur – und Umweltschutz-Akademie NRW.