We are dedicating our project to the study of the Durmersheim gravel pit, as it is a major biological feature due to the lack of fish population.

In our study, we will look at the aquatic fauna and thereby investigate the effects of missing fish populations. We will use the nearby Epplesee, which has a fish population, as a comparator. This makes it a suitable object of comparison to determine how coexistence with fish affects the amphibians and the macrozoobenthos of a water body. The latter is defined as the bottom-bound invertebrate fauna, including for example snails, mussels, crustaceans and insects. This is an important bioindicator as well as a basis for the occurrence of birds and other higher vertebrates. Exploratory surveys showed evidence of the presence of unusual animals, such as paedomorphic pond newts and the rare mud swimmer beetle Hygrobia hermanni


In the last month before the end of the competition, we were busy evaluating the samples and drawing conclusions about the biodiversity.

Lesen Sie mehr

Newts and insects in June and July

The installed eclectors, which were emptied after 1 or 2 weeks, confirm our assumptions that the lack of fish gives the macrozoobenthos and thus also the insects the possibility of unlimited dispersal. The newt population was surveyed in the evening and sighted every other week during the day. The hot weather has had an impact on the newts.

Lesen Sie mehr

Macrozoobenthos, newts and insects

In several inspections we have dedicated ourselves to the macrozoobenthos, which lives on the bottom of the gravel pit. In addition, we have actively engaged in the identification and counting of the little animals, as well as placed traps for hatching insect larvae. The first newts were also discovered and captured with photographs.

Lesen Sie mehr