Habitatové preference larev pošvatek čeledi Perlidae a Perlodidae - studie druhu Perla burmeisteriana
| Title in English | HABITAT PREFERENCES OF STONEFLY LARVAE OF FAMILY PERLIDAE AND PERLODIAE. CASE SUTY OF PERLA BURMEISTERIANA |
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| Authors | |
| Year of publication | 2003 |
| Type | Article in Periodical |
| Magazine / Source | Acta Facultatis Ecologie |
| MU Faculty or unit | |
| Citation | |
| Field | Ecology |
| Keywords | stonefly; running waters; Perlidae; Perlodiade |
| Description | Stonefly larvae of Perlidae and Perlodidae are traditionally classified as epipotamal (Perla burmeisteriana, Perlodes microcephalus, P. dispar, Isoperla grammatica) and rhithral (Perla marginata, Isoperla oxylepis etc.) indicators. But occurrences of these species were documented in all part of streams. The main factor influenced occurrence are structure of bottom (roughness), type of current, oxygen saturation. Water temperature is important but no more limiting. There is only limit of highest temperature about 25C during several days. It seems that rhithal zone, esp. upper part (epirhithral), are for former epipotamal species (e.g. Perla burmeisteriana) refugium. Current adaptation of local populations is very constant and on the other hand the specimens could spread on surrounding habitats that means mainly downstream and occupied step by step original patch. This life strategy corresponds very well to metapopulation theory (HANSKI 1999) and patch dynamic concept (TOWNSEND 1989). |
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