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The influence of increasing uncontrolled recreation on the structure of plankton and macrophyte communities in the tunnel-valley lakes located in agricultural catchment area

100%

Kuczynska-Kippen N., Messyasz B., Nagengast B.

Roczniki Akademii Rolniczej w Poznaniu. Botanika

2003

tom 06

In the years 1993-1995 biological research was carried out on three lakes, which are situated in a typical agricultural catchment area, along the Gołaniecka River. The hydrobiological examination carried out in 1993 revealed a stable state of eutrophy on these lakes. At that time neither of the Bukowieckie lakes was used for recreation, while at the Kobyleckie lake there were a number of buildings, including private holiday homes and holiday camps. In 1995, the year finishing the examination, recreation housing began to develop at the Bukowieckie Du?e lake and also an acceleration of tourism was observed on the Kobyleckie lake. In the spring and summer of 2000 hydrobiological research was repeated in order to find out whether the changes in the neighbourhood of the lakes had affected the chemical condition of lake waters. Although the building area by the lakes was still unfinished, particular changes of many parameters of water were already observed. Negative effects of trophic status were noted in the decrease of the visibility of water, increase of the nutrients concentration, in the outstanding blue-green algae character of the spring phytoplankton (Aphanizomenon issatschenkoi (Ussac.) Proschkina-Lavrenko; Planktothrix agardhii (Gom.) Anagn. et Kom.; Limnothrix redekei (Van Goor) Meffert) and zooplankton (Keratella cochlearis f. tecta (Lauterborn), K. quadrata (O.F. Müller), Anuraeopsis fissa (Gosse), Bosmina longirostris (O.F. Müller) and Chydorus sphaericus (O.F. Müller)), the increase of the total densities of zooplankton with the dominance of rotifers, the impoverishment of the phytolittoral, as well as quality and quantity changes in the structure of macrophytes.

Phytoplankton of the Gulf of Gdansk in 1992 and 1993

63%

Plinski M.

Oceanologia

1995

tom 37

nr 1

Ograniczanie wyników

1 Oceanologia

1 Roczniki Akademii Rolniczej w Poznaniu. Botanika

1 Kuczynska-Kippen N.

1 Messyasz B.

1 Nagengast B.

1 Plinski M.

1 2003

1 1995

Wyniki wyszukiwania

The influence of increasing uncontrolled recreation on the structure of plankton and macrophyte communities in the tunnel-valley lakes located in agricultural catchment area

Phytoplankton of the Gulf of Gdansk in 1992 and 1993