Funding
This study was funded by the German Research Foundation (DFG) grants awarded to
FW (WE2700/5-1) and TB (BA5508/2-1) and start-up funds from the College of Arts and Sciences at the University of Alabama at Birmingham to SAKH.Authors’ contributions AKN, FW and TB conducted the fieldwork and experiment and contributed to the writing of the manuscript. SAKH and SK carried out part of the lab-work and contributed to the writing of the manuscript. GB conducted the lab-work, processed the sequencing data, carried out the analysis and drafted the manuscript.