- Department:(Dept. 4) Fish Biology, Fisheries and Aquaculture
Biological invasions reveal how niche change affects the transferability of species distribution models
It is widely debated if species distribution models are transferable across space and time. The authors synthesized results on 217 species from 50 studies to elucidate effects of niche change on model transferability. They found that niche change reduced model transferability; however, a lack of presence points for developing models led to an even stronger reduction in transferability.
Equilibrated evolution of the mixed auto-/allopolyploid haplotype-resolved genome of the invasive hexaploid Prussian carp
The Prussian carp or Gibel carp is considered one of the most successful invasive fish species in Europe. Its ability to reproduce asexually gives it a major advantage over competing fish. The authors have for the first time described the complete genome of the Prussian carp.This also provides a much better understanding of its unusual reproductive method and to improve its management.
Evolution of toxins as a public good in phytoplankton
The authors studied, with an individual-based phytoplankton model, how toxins can evolve and how intraspecific variation of toxicity can be maintained in toxic phytoplankton blooms. They found that small-scale spatial heterogeneity generated by binary division of phytoplankton cells can explain the evolution of toxins as a public good and the coexistence of toxic and non-toxic genotypes.
Recreational angling and spearfishing on social media: insights on harvesting patterns, social engagement and sentiments related to the distributional range shift of a marine invasive species
The authors compared ecological and social dimensions of recreational angling and spearfishing targeting the invasive bluefish (Pomatomus saltatrix) in Italy using digital videos and their associated data. The study showcases the value of exploring social media to understand the ecological and human dimensions of marine recreational fisheries in relation to distributional range shifts of species.
Spatial and seasonal patterns of water isotopes in northeastern German lakes
In course of measuring campaigns, the spatial and temporal dynamics of water isotopes in northeastern German lakes were evaluated. The data will serve as basis for further studies, for example with respect to connectivity of lakes and biochemical processes in macrophytes.
Evolutionary impact of size-selective harvesting on shoaling behavior: individual-level mechanisms and possible consequences for natural and fishing mortality
The authors present a multigeneration harvest selection experiment with zebrafish as a model to understand the effects of size-selective harvesting on shoaling behavior. Using high-resolution tracking of fish behavior with computational agent-based modeling, they show that shoal cohesion changed in the direction expected by a trade-off between individual vigilance and the use of social cues.
Predator group composition indirectly influences food web dynamics through predator growth rates
The authors aimed to find empirical support for the theoretically predicted effect of intraspecific behavioral variation on food web dynamics and ecosystem function. In pond experiments, there was no effect of behavioral variation of predators on dynamics of lower trophic levels, but predator mass varied according to group composition, and hence was a strong predictor of food web effects.
Big-data approaches lead to an increasedunderstanding of the ecology of animal movement
The authors present methods that combine high-resolution tracking technologies with Big Data analyses to investigate the movements of fish and other animals. Through high resolution tracking the effects of environmental and climate changes on wildlife can be better understood, and nature and wildlife conservation be advanced on this basis.
A global agenda for advancing freshwater biodiversity research
Researchers from 90 scientific institutions worldwide have stated that freshwater biodiversity research and conservation lag far behind the efforts in terrestrial and marine environments. They propose a research agenda with 15 priorities aimed at improving research on biodiversity in lakes, rivers, ponds and wetlands. This is urgently needed as the loss of biodiversity there is dramatic.
Setting robust biodiversity goals
The new global biodiversity framework (GBF) must drive action to reverse the decline of biodiversity. However, the draft goals and targets fail to set out these clear outcomes. The authors propose modifications that would help to reveal the specific contribution of each action and provide clarity on whether the achievement of action targets would be adequate to achieve the outcome goals.