Výskyt vodních bezobratlých ve svrchních vrstvách substrátu vyschlého toku
| Title in English | Occurrence of water macroinvertebrates in upper bottom layers of a dried stream |
|---|---|
| Authors | |
| Year of publication | 2006 |
| Type | Article in Proceedings |
| Conference | Sborník příspěvků 14. konference České limnologické společnosti a SLS |
| MU Faculty or unit | |
| Citation | |
| Field | Ecology |
| Keywords | drought; macroinvertebrates; stream; Czech Republic; draied bottom; |
| Description | The dying-up is the disturbance, affecting biotic and abiotic conditions in streams. This study was focused on water macroinvertebrates, which are able to survive in wet upper layers of stream bottom substrate (Gránický brook, Czech Republic). Two series of samples in 2 different data was taken from dried brook bottom (area 0,1 m2, into depth 10 cm) in 3 types of consecutive drying-up habitats (pool, riffle, bankzone). In the second sampling date was also taken samples from watered residual pools. The highest densities were found in both series of dried bottom samples in pool habitat, contrary to the lowest densities in riffle habitats. Number of taxa in different habitats did not differ markedly amongst habitats. The most abundant higher taxa groups were Chironomidae (pools), aquatic Clittelata (Eiseniella tetraedra and Enchytraeidae dominated). On the other hand in riffles were very abundant early instars of Plecoptera (Nemoura sp.). Many terrestrial predators were found in the dry bottom samples (e.g. Staphylinidae). |
| Related projects: |