IBF Eco
The temporal and spatial distribution of gall inducing sawflies on their host plant species (Salix fragilis) are recorded during two vegetation periods (2009, 2010) on an experimental plot at the Ecological-Botanical Garden of the University of Bayreuth. 40 plants belonging to four previously investigated and described clones are controlled in two week intervals. We record the occurrence of galls induced by Euura testaceipes, Phyllocolpa oblita und Pontania proxima as well as their location on the plant. Allocated shoots and leaves are marked and their growth is estimated by regular measurements. On each plant control shoots, exhibiting no galls are recorded as well. The relevance of shoot length will be investigated in the second year in a manipulation experiment, by pruning back half of the plants from each clone to induce long shoots.
Our scientific goal is to document the spatial distribution and temporal occurrence of the gall inducing species sharing the same host plants and to correlate gall occurrence and densities with factors like shoot length and shoot growth.
The technical goal is to test and improve the dataflow, especially to test export interfaces of the Diversity Workbench components to establish multiple possibilities to edit and analyse the previously stored data. Digital data gathering using a smart phone with DiversityMobile as well as the data synchronisation and data transfer to the repository database will be tested and optimized during the first year. In the second year of investigation all field data will be gained by using DiversityMobile and transferred to the repository database. Furthermore, new possibilities of data transfer back to the scientist, user-friendly data editing and automated data analysis will be developed and tested.
Scientists in this workpackage: A. Guhr, Prof. Dr. G. Rambold, Dr. A. Kehl (bis 2011)
Central Laboratory for DNA-Analytics and Ecoinformatics, University of Bayreuth
http://www.diversitymobile.net/wiki/images/d/d5/SalixFlaeche.jpg
http://www.diversitymobile.net/wiki/images/d/d8/Phyllocolpa.jpg
http://www.diversitymobile.net/wiki/images/1/1d/Pontania.jpg
Experimental Plot . . . . . . . . . . . . Phyllocolpa oblita . . . . . . . . . . . . Pontania proxima . . . . . . . . . . . .
Kehl, A. 2006. Wirtsselektivität gallinduzierender Pflanzenwespen (Hymenoptera, Tenthredinidae) an Weiden (Salix spp.): die Bedeutung von Phänotyp und Genotyp im Salix alba/S. fragilis-Komplex für die Belegung mit Gallen, Dissertation, Universität Bayreuth.
Kehl, A. & Rambold, G. 2008. Genotypical and multiple phenotypical traits discriminate Salix × rubens clearly from its parent species. Plant Systematics and Evolution, 275 (3–4): 169–179.
Kehl, A. & Rambold, G. 2010. Interference of host plant morphology and phenology and their correlation with abundance patterns of the leaf galling sawfly Pontania proxima. Population Ecology (Online First: DOI: 10.1007/s10144-010-0215-8).
Kehl, A., Dötterl, S., Aas, G. & Rambold, G. 2010. Is flower scent influencing host selection in leaf galling sawflies (Hymenoptera, Tenthredinidae) on willows? Chemoecology (Online First: DOI: 10.1007/s00049-010-0050-6).