Erhebung der Fischbiodiversität in Schweizer Fliessgewässern. Progetto Fiumi Schlussbericht

Brodersen, Jakob; Hellmann, Johannes; Seehausen, Ole

doi:10.55408/eawag:30020

Cited by 2 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Importantly, for fish, most expected species belong to different genera within a given biogeographical region (as documented for Swiss fresh waters in ref. 70 ), thus genus-level identification often also allows species-level interpretation, while for invertebrates the database coverage was best for genus level. Note that, in principle, the same analyses could have been operated on taxonomically unspecified clusters such as molecular OTUs (MOTUs), but this would have hindered interpretation of the results from a conservation perspective, where the relevant units are described taxa (species or genera).…”

Section: Methodsmentioning

confidence: 99%

Modelling environmental DNA transport in rivers reveals highly resolved spatio-temporal biodiversity patterns

Carraro

Blackman

Altermatt

2023

Sci Rep

View full text Add to dashboard Cite

The ever-increasing threats to riverine ecosystems call for novel approaches for highly resolved biodiversity assessments across taxonomic groups and spatio-temporal scales. Recent advances in the joint use of environmental DNA (eDNA) data and eDNA transport models in rivers (e.g., eDITH) allow uncovering the full structure of riverine biodiversity, hence elucidating ecosystem processes and supporting conservation measures. We applied eDITH to a metabarcoding dataset covering three taxonomic groups (fish, invertebrates, bacteria) and three seasons for a catchment sampled for eDNA at 73 sites. We upscaled eDNA-based biodiversity predictions to approximately 1900 reaches, and assessed α- and β-diversity patterns across seasons and taxonomic groups over the whole network. Genus richness predicted by eDITH was generally higher than values from direct eDNA analysis. Both predicted α- and β-diversity varied depending on season and taxonomic group. Predicted fish α-diversity increased downstream in all seasons, while invertebrate and bacteria α-diversity either decreased downstream or were unrelated to network position. Spatial β-diversity mostly decreased downstream, especially for bacteria. The eDITH model yielded a more refined assessment of freshwater biodiversity as compared to raw eDNA data, both in terms of spatial coverage, diversity patterns and effect of covariates, thus providing a more complete picture of freshwater biodiversity.

show abstract

Section: Methodsmentioning

confidence: 99%

Modelling environmental DNA transport in rivers reveals highly resolved spatio-temporal biodiversity patterns

Carraro

Blackman

Altermatt

2023

Sci Rep

View full text Add to dashboard Cite

show abstract

Differential biotransformation ability may alter fish biodiversity in polluted waters

Franco,

Hollender,

Schirmer

2024

Preprint

View full text Add to dashboard Cite

Divergence in the activity of biotransformation pathways could lead to species sensitivity differences to chemical stress. To explore this hypothesis, we evaluated the biotransformation capacity of five fish species that are representatives of Swiss biodiversity assemblages and that inhabit watercourses surrounded by different land use. We report important interspecific differences regarding the presence and activity of major biotransformation pathways, such as the invasive pumpinkseed (Lepomis gibbosus) displaying micropollutant clearance between 3- and 7-fold higher than native species (e.g. Salmo trutta, Squalius cephalus) collected in the same areas. These differences were exacerbated by urban and agricultural influence, which increased biotransformation potential at the enzyme level by as much as 11-fold and micropollutant clearance by approximately 2-fold compared to biotransformation levels in areas with minimal human influence. In the context of the chemical defensome, we argue that fish with low biotransformation activity carry a greater burden on chemical stress, making them less likely to cope with additional stressors and sustain their population in competition with species with a higher biotransformation capacity.

show abstract

Erhebung der Fischbiodiversität in Schweizer Fliessgewässern. Progetto Fiumi Schlussbericht

Cited by 2 publications

References 3 publications

Modelling environmental DNA transport in rivers reveals highly resolved spatio-temporal biodiversity patterns

Modelling environmental DNA transport in rivers reveals highly resolved spatio-temporal biodiversity patterns

Differential biotransformation ability may alter fish biodiversity in polluted waters

Contact Info

Product

Resources

About