Das Projekt "Species traits, funcional groups and environmental constraints - A case study on the hoverflies (Diptera, Syrphidae) in the river Elbe floodplain" wird/wurde gefördert durch: Kultusministerium des Landes Sachsen-Anhalt. Es wird/wurde ausgeführt durch: Umweltforschungszentrum Leipzig-Halle GmbH, Department Naturschutzforschung.25 years ago, Grime (1977) and Southwood (1977) published the first habitat templets to describe relationships between environmental parameters and life history strategies. This has subsequently lead to a changing worldview of ecology in forcing ecologists to study the organism-in-its-environment and not as a closed system (Korfiatis and Stamou 1999, Statzner et al. 2001). We are interested in exploring relationships between biological traits of hoverflies and the environmental constraints that have to lead their evolution and test the application of this knowledge for environmental assessment. This study aims to: 1. explore the relationships between life history traits and environmental variables in hoverflies. 2. group species of hoverflies to functional groups with similar life history traits. The aim in forming functional groups is to represent the ecological structure of a fauna, and perhaps to use that structure to make predictions at a lavel that is more practicable and more general than the level of individual species, but that enables better prediction than the level of all the species. 3. make suggestions for the use of hoverfly functional groups for environmental assessment. Investigations are carried out at a study site in the floodplain of the river Elbe in central Germany. Using Malaise trps, 35 sites were surveyed in 1998, 1999, 2002 and 2003. The environmental parameters recorded on the same sites were: height above sealevel (as an approximation of inundation frequency), macrohabitats, microhabitats (e.g. structures like dead wood or ant nests), distance from the course of the Elbe and relevant habitats and soil parameters. Life history trait information is taken from the 'Syrph the net'- Database of European Syrphidae (Speght et al. 2001). Data analysis uses explorative multivariate statistics (CA, PCA, Co-intertia) and Monte-Carlo-Procedures.
Das Projekt "Vergleichende Bewertung der oekologischen Folgen der Flaechenstillegungen gezeigt an Laufkaefern (Carabidae) und Schwebfliegen (Syrphidae)" wird/wurde gefördert durch: Hessische Minister für Landesentwicklung, Wohnen, Landwirtschaft, Forsten und Naturschutz. Es wird/wurde ausgeführt durch: Universität Gießen, Institut für Phytopathologie und Angewandte Zoologie.Die von der EU gefoerderte Stillegung von Agrarflaechen ueber 5 Jahre wurde hessenweit vergleichend untersucht, wobei Laufkaefer (Carabidae) und Schwebfliegen (Syrphidae) als Indikatoren dienten. Extensiv genutzte Ackerflaechen, insbesondere in Mittelgebirgsrandlagen, erwiesen sich ueberwiegend als guenstiger fuer die Artenvielfalt als stillgelegte Ackerflaechen.