Monthly Archives: March 2016

New article in the Barcode Bulletin

We just published a short article in the Barcode Bulletin.

In the march issue (pages 10-12), Florian and Jan write about how different cryptic Deleatidium mayfly species from New Zealand show strongly different responses to anthropogenic stressors in the stream and the cosequences this has for ecosystem assessments.

New project: eDNA of the “Emscher sculpin”

We are starting a new project:

Gunnar Jacobs (who is also working for Emschergenossenschaft, the local water board) starts his PhD thesis.  He will investigate the occurrence, distribution and dispersal ability of the “Emscher sculpin” (Cottus cf. rhenanus) in the river Emscher and its tributaries.

The Emscher sculpin is a fish which survived the major industrial pollution of rivers in the Emscher catchment during the last 100 years in the upper reaches of a few streams. Specimens from these relic populations are now used to repopulate ecologically restored streams and rivers in the region.

Gunnar will use eDNA (environmental DNA) to study the occurrence and distribution of the Emscher sculpin and how fast it can disperse and repopulate streams after the reintroduction. Using eDNA means that that Gunnar will filter water from the stream and analyze the sculpin DNA in it, which also means that he does not need to catch the fishes. Gunnar’s work will greatly help to understand the Emscher sculpin and the Emscher ecosystem and to subsequently make protection of the ecosystem easier.

Welcome, Gunnar! We are looking forward to the exciting project!


Cottus IMG_3417

New PrePrint: Testing the potential of 16S for DNA metabarcoding

Together with our colleges from France we just have published our first PrePrint, where we test the potential of the 16S marker for DNA metabarcoding. We were able to show that freshwater insects are more consistently amplified with the developed 16S primer than with standard Folmer COI barcoding primer. While the taxonomic resolution of the 16S marker remains unknown for insects, the ribosomal marker might be a viable alternative metabarcoding marker when local reference databases can be easily established. For now we will however continue using the COI marker, due to availability of good reference databases and optimised freshwater COI markers which show similar performance.



New paper: Drastic underestimation of amphipod biodiversity in the endangered Irano-Anatolian and Caucasus biodiversity hotspots

Together with colleagues from the University of Tehran, we just published a paper on the diversity of amphipods in the highly endangered Irano-Anatolian and Caucasus biodiversity hotspots. So far, only five morphospecies had been known from the streams and rivers of these regions. By using molecular techniques, we could identify 42 mostly unknown species, showing that also the scarcely studied freshwater ecosystems of the region harbour a great biodiversity and deserve protection.

Scientific Reports: Drastic underestimation of amphipod biodiversity in the endangered Irano-Anatolian and Caucasus biodiversity hotspots

Florian on the radio

Florian was recently interviewed by Radio Leonardo. He talked about how new molecular tools can help to revolutionize and improve ecological water quality assessment of streams and rivers.

Link to the interview (podcast 25.02.2015, Florian’s part starts at minute 25):