Vliv hydrologických podmínek toku na biotu dna a hyporhealu (Úvod do problematiky)
| Title in English | The impact of hydrological conditions in stream on the top bottom and hyporheic biota (Project introduction) |
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| Authors | |
| Year of publication | 2000 |
| Type | Article in Proceedings |
| Conference | XII. Limnologická konference "Limnologie na přelomu tisiciletí", Kouty nad Desnou. Sborník referátů |
| MU Faculty or unit | |
| Citation | |
| Field | Ecology |
| Keywords | Running waters; streams; rivers; ecology; hyporheal; makrozoobentos; algae; hydraulic canditions |
| Description | Extreme flows can be considered classic example of ecological disturbances within the ecosystem of running waters. This flows in natural conditions as well as the behaviour of living systems during these situations are quite normal phenomena. Deforestation, landscape changes and its intensive usage leads to increased water flows and extremely high discharges. Currently, extreme flows appear quicker than in the past, their intensity and period of lasting are often very different. The influence on the biota of streams is high, and in our conditions it has not been evaluated and quantified. The research aims are: To verify the validity of basic hypothesis of the general description running waters ecosystems during extreme discharges (patch dynamic concept, flow refugia concept, hypoereic refugia concept), e.g. to knowledge structure and dynamics of communities, trofic guilds structure and life strategies of benthic taxons. To determine criteria of resistance and resilience of communities and the whole ecosystems of running waters influenced by changed discharge regime. To determine critical time limits of duration of unfavourable conditions, that can be measurably shown on the biocenoses of the bottom and to assess rate of rehabilitation of the system after their disappearance. |
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