Authors’ contributions
W.K., N.B. and A. Schwarz performed sampling. R.S. and S.A. performed
molecular analyses, S.K. ran high-throughput sequencing, S.A. processed
the sequence data. W.K. and P.R. worked on morphological analyses of the
diatoms. S.A. and W.K. analyzed the data and performed statistical
analyzes. A. Schwalb developed the program (DFG-GRK 2309) that funded
this research. S.A. prepared the manuscript with the contributions from
all authors. All authors approved the final version.