Lotic communities of two small temporary karstic stream systems (East Westphalia, Germany) along a longitudinal gradient of hydrological intermittency |
| |
| Authors: | Alexander Meyer Elisabeth I Meyer Christina Meyer |
| |
| Institution: | Institute for Animal Evolution and Ecology, Department of Limnology, University of Muenster, Germany |
| |
| Abstract: | The spatial and temporal discharge regime and its effects on benthic communities were studied in two small temporary karstic stream systems of the Paderborner Hochfläche (East Westphalia, Germany). Both streams are characterized by very small perennial springbrook sections. Benthic invertebrates were sampled three times at 12 sites and discharge was measured monthly from March to September 2000. The spatial extension of streamflow was observed regularly to evaluate the duration of drought. Both streams showed a longitudinal gradient of hydrological intermittency from very small perennial reaches with low intermittency to an extremely harsh hydrological situation. The benthic communities displayed a decreasing species richness at increasing intermittency. The different hydrological stream sections were colonized by different lotic communities, characterized by typical species of temporary streams and by several typical species of springs. Particularly the perennial springs and springbrooks are very important for the species richness in these karstic stream systems. |
| |
| Keywords: | Hydrology karstic streams karst springs karst intermittency temporary waters stream classification lotic communities macroinvertebrates |
| 本文献已被 ScienceDirect 等数据库收录！ |
