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Über 300 Gaststudierende bestreiten diesen Sommer an der Goethe-Universität in Frankfurt ein Auslandssemester. Um den Neuankömmlingen das Leben in der Main-Metropole näherzubringen, richtete die lokale Sektion des International Exchange Erasmus Student Networks (kurz ESN) zwei Welcome-Weeks aus, bei der sich die »Internationals« auf ihren bevorstehenden Auslandsaufenthalt schon mal gut einstimmen konnten. Auf dem Programm standen unter anderem eine historische Stadtführung durch die Frankfurter City, ein Besuch des Senckenberg-Museums und ein Kennenlern-Abend in Altsachsenhausen.
Warum haben sich die jungen Studenten gerade für Frankfurt entschieden?
Wo gibt es Probleme und Hürden?
Was war ihr erster Eindruck der Universität?
Der UniReport hat sechs von ihnen getroffen und nachgefragt.
Primary determinants of communities in deadwood vary among taxa but are regionally consistent
(2020)
The evolutionary split between gymnosperms and angiosperms has far‐reaching implications for the current communities colonizing trees. The inherent characteristics of dead wood include its role as a spatially scattered habitat of plant tissue, transient in time. Thus, local assemblages in deadwood forming a food web in a necrobiome should be affected not only by dispersal ability but also by host tree identity, the decay stage and local abiotic conditions. However, experiments simultaneously manipulating these potential community drivers in deadwood are lacking. To disentangle the importance of spatial distance and microclimate, as well as host identity and decay stage as drivers of local assemblages, we conducted two consecutive experiments, a 2‐tree species and 6‐tree species experiment with 80 and 72 tree logs, respectively, located in canopy openings and under closed canopies of a montane and a lowland forest. We sampled saproxylic beetles, spiders, fungi and bacterial assemblages from logs. Variation partitioning for community metrics based on a unified framework of Hill numbers showed consistent results for both studies: host identity was most important for sporocarp‐detected fungal assemblages, decay stage and host tree for DNA‐detected fungal assemblages, microclimate and decay stage for beetles and spiders and decay stage for bacteria. Spatial distance was of minor importance for most taxa but showed the strongest effects for arthropods. The contrasting patterns among the taxa highlight the need for multi‐taxon analyses in identifying the importance of abiotic and biotic drivers of community composition. Moreover, the consistent finding of microclimate as the primary driver for saproxylic beetles compared to host identity shows, for the first time that existing evolutionary host adaptions can be outcompeted by local climate conditions in deadwood.