Abstract
Regulation of river courses may have several environmental effects. This report describes investigations in NIVA`s experimental troughs near Oset, Maridalsvannet, Oslo, Norway. The main topic is algae periphyton and benthic invertebrates, with different emphasis on the different components. In 1989 the problem of ``the impact of benthic invertebrates on algae periphyton`` was illuminated, and In 1990 the converse, ``the impact of algae periphyton on benthic invertebrates`` as well as the effects of various additives of readily available phosphorus on algae periphyton. It is found that small additions of phosphorus (0.5 {mu}g P/l) may lay the foundation for a dramatic increase in growth rate and biomass. Some groups of benthic invertebrates responded quickly to the increased mass of algae. In 1991 the research was concentrated on establishing algae periphyton over a long time, at various temperatures, with and without the addition of phosphorus. The results of three years of research form, with similar results from the literature, the foundation of certain conclusions about the conditions for the establishment of algae mass in running water. The report states five levels of phosphorus concentration which may develop different levels of biomass. At the highest levels the size of the biomass is described as
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Citation Formats
Lindstroem, E A, Bremnes, T, and Johansen, S W.
Experimental investigations for controlling periphyton in regulated rivers; Eksperimentelle undersoekelser for kontroll av begroing i regulerte vassdrag.
Norway: N. p.,
1994.
Web.
Lindstroem, E A, Bremnes, T, & Johansen, S W.
Experimental investigations for controlling periphyton in regulated rivers; Eksperimentelle undersoekelser for kontroll av begroing i regulerte vassdrag.
Norway.
Lindstroem, E A, Bremnes, T, and Johansen, S W.
1994.
"Experimental investigations for controlling periphyton in regulated rivers; Eksperimentelle undersoekelser for kontroll av begroing i regulerte vassdrag."
Norway.
@misc{etde_397108,
title = {Experimental investigations for controlling periphyton in regulated rivers; Eksperimentelle undersoekelser for kontroll av begroing i regulerte vassdrag}
author = {Lindstroem, E A, Bremnes, T, and Johansen, S W}
abstractNote = {Regulation of river courses may have several environmental effects. This report describes investigations in NIVA`s experimental troughs near Oset, Maridalsvannet, Oslo, Norway. The main topic is algae periphyton and benthic invertebrates, with different emphasis on the different components. In 1989 the problem of ``the impact of benthic invertebrates on algae periphyton`` was illuminated, and In 1990 the converse, ``the impact of algae periphyton on benthic invertebrates`` as well as the effects of various additives of readily available phosphorus on algae periphyton. It is found that small additions of phosphorus (0.5 {mu}g P/l) may lay the foundation for a dramatic increase in growth rate and biomass. Some groups of benthic invertebrates responded quickly to the increased mass of algae. In 1991 the research was concentrated on establishing algae periphyton over a long time, at various temperatures, with and without the addition of phosphorus. The results of three years of research form, with similar results from the literature, the foundation of certain conclusions about the conditions for the establishment of algae mass in running water. The report states five levels of phosphorus concentration which may develop different levels of biomass. At the highest levels the size of the biomass is described as ``problematic``. 100 refs., 55 figs., 97 tabs.}
place = {Norway}
year = {1994}
month = {Dec}
}
title = {Experimental investigations for controlling periphyton in regulated rivers; Eksperimentelle undersoekelser for kontroll av begroing i regulerte vassdrag}
author = {Lindstroem, E A, Bremnes, T, and Johansen, S W}
abstractNote = {Regulation of river courses may have several environmental effects. This report describes investigations in NIVA`s experimental troughs near Oset, Maridalsvannet, Oslo, Norway. The main topic is algae periphyton and benthic invertebrates, with different emphasis on the different components. In 1989 the problem of ``the impact of benthic invertebrates on algae periphyton`` was illuminated, and In 1990 the converse, ``the impact of algae periphyton on benthic invertebrates`` as well as the effects of various additives of readily available phosphorus on algae periphyton. It is found that small additions of phosphorus (0.5 {mu}g P/l) may lay the foundation for a dramatic increase in growth rate and biomass. Some groups of benthic invertebrates responded quickly to the increased mass of algae. In 1991 the research was concentrated on establishing algae periphyton over a long time, at various temperatures, with and without the addition of phosphorus. The results of three years of research form, with similar results from the literature, the foundation of certain conclusions about the conditions for the establishment of algae mass in running water. The report states five levels of phosphorus concentration which may develop different levels of biomass. At the highest levels the size of the biomass is described as ``problematic``. 100 refs., 55 figs., 97 tabs.}
place = {Norway}
year = {1994}
month = {Dec}
}