Zusammenfassungen der Arbeitskreisbeiträge - Die DPG

The nematode fauna of mofette fields (natural
carbon-dioxide springs)
Karin Hohberg 1 , Hans-Jürgen Schulz 1 & Hardy Pfanz 2
1 Senckenberg Museum für Naturkunde Görlitz,
Am Museum 1, 02826 Görlitz, Germany;
2 Universität Duisburg-Essen, Campus Essen,
Abteilung Angewandte Botanik, 45141 Essen
karin.hohberg@senckenberg.de
We are investigating soil nematode communities in mofette
fields where geogenic CO2 rises from magma chambers
through clefts and cracks in the crust upwards to the soil
surface. The uppermost soil layers around these gas escapes
show small-scale patches where CO2 concentrations are up
to 100% and O2 concentrations are accordingly low or even
zero. Our first, preliminary results show that nematodes
occur in high densities even in 100% CO2 spots, with 1.5 to
9.3 10 6 nematodes m –2 independent of CO2 concentration.
Nematode species numbers, on the other hand, were clearly
reduced compared to 0.1% CO2-spots: We determined a
mean number of 4.3 (100% CO2) vs. 19.9 (