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Hydrobiology (Fach) / VO II (Lektion)
- Freshwater-systems -freshwater-systems comprise of 0.8% of the earths surface; its biodiversity is about 6% of all described species -freshwaters are among the most threatened systems on earth
- Emergency recovery plan for global freshwater biodiversity 1. Accelerate implementation of enviromental flows 2. Improve water quality 3. Protect and restore critical habitats 4. Manage exploitation of species and riverine aggregates 5. Prevent and control non-native species invations 6. Safeguard and restore freshwater connectivity
- Primary producers in running waters Pomatal waters: -river-/potamoplankton -limiting criteria: current / turbulance, turbidity, flow time (age of the "flowing cave") Covering algae: -Periphyton = epipelic Algae -in stone/gravel-surfaces and other substrates Mosses: spring-moss (Fontinalis antypyretica) Macrophytes -often high production-rate -utilisation in food chains dominant Fallen leaves (allochthon) -in rhithral-rivers outstanding high importance (River-Continuum-Concept)