Ökotechnologischer Einsatz von höheren Wasserpflanzen in stehenden und gestauten Gewässern — Möglichkeiten, Grenzen
✍ Scribed by Kummer, M. ;Weise, G.
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 740 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0323-4320
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✦ Synopsis
Species of macrophytes which are suitable for the biogenic aeration of the hypolininion by macrophytes must reach positive balances of the net primary production a t a high development of populations also a t low light intensities and temperatures (winter). Elodea canedensis, Juncus bulbosus and Littorella uniflora from suitable sites were exposed after holding a t different water depths, and the biomass development was investigated in relation to the radiation intensity. Parallel t o tha.t, the net primary production was determined in dependence on the light intensity in the bottle experiment' by air-conditioned laboratory experiments (oxygen met,hod). Elodea canadensis has been found to be suitable for the ecotechnological application t'o more eutrophic waters with neutral pH, especially because of the low light compcnsation point of t,he net primary production. Colonization with Juncus bulbosus, however, seems to be possible only in t.he acidophilic rmge ( p H c 7 ) , whereas Littorella. uniflora is not suitable for floating vegetation covers because of the higher light compensation point for a hypolimiietic colonization and the linkagt: t o the substrate.