Changes in the composition of the plankton of the rivers Rhine and Meuse in the Netherlands during the last fifty-five years
Peelen, R. (1975). Changes in the composition of the plankton of the rivers Rhine and Meuse in the Netherlands during the last fifty-five years. Verh. - Int. Ver. Theor. Angew. Limnol. 19: 1997-2009
In: Verhandlungen. Internationale Vereinigung für theoretische und angewandte Limnologie. E. Schweizerbartsche Verlagsbuchhandlung/Schweizerbart/Schweizerbart'sche Verlagsbuchhandlung: Stuttgart. ISSN 0368-0770, more
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| Keywords |
Aquatic communities > Plankton
Classification systems
Composition > Community composition
Environmental effects
Eutrophication
Pollution > Water pollution
Population dynamics
Temporal variations > Long-term changes
Water bodies > Inland waters > Rivers
Algae; Aphanizomenon flos-aquae Ralfs ex Bornet & Flahault, 1886 [WoRMS]; Ciliata Couch, 1832 [WoRMS]; Crustacea [WoRMS]; Microcystis aeruginosa (Kützing) Kützing, 1846 [WoRMS]; Oscillatoria agardhii Gomont, 1892 [WoRMS]; Rotifera [WoRMS]
Fresh water |
| Abstract |
Substantial changes have taken place in the physicochemical environment of the rivers Rhine and Meuse in the past 55 yrs. increased eutriphication of the backwaters of the Rhine, such as the Bodensee and the Zurich-See, brought {beta}-mesosaprobic organisms such as Microcystis aeruginosa and Aphanizomenon flos-aquae as far down stream as the part beyond the Dutch frontier. in the Meuse Oscillatoria agardhii is occasionally present. No statistically significant change in the saprobic grade of the plankton of the Dutch parts of both rivers have taken place in the past 55 yrs. The new invading spp belong to the same saprobic category-{beta}- mesosaprobic-as the community as a whole. Compared with 1916 an increase in total numbers has taken place. The closure of the Haringvliet-the estuarine end of both rivers-caused another increase in numbers, as the residence time of the plankters within this area was increased. The fact that the closure took place in a year of rather small river discharge enhanced this rise. |
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