Changes in Phytoplankton and Water Quality during Sustainable Restoration of an Urban Lake Used for Recreation and Water Supply
Groundwater intake near Lake Głębokie, situated in the city of Szczecin in Northwestern Poland, resulted in a distinct decrease in the lake water level. Water intake from a river and a neighboring urban area led to eutrophication and a strong cyanobacterial water bloom. Both the water intake and rec...
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doaj-72944504ac2a45f381eea15b2e16b7a92020-11-24T21:44:57ZengMDPI AGWater2073-44412017-09-019971310.3390/w9090713w9090713Changes in Phytoplankton and Water Quality during Sustainable Restoration of an Urban Lake Used for Recreation and Water SupplyAnna Kozak0Ryszard Gołdyn1Renata Dondajewska2Katarzyna Kowalczewska-Madura3Tomasz Holona4Department of Water Protection, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, Poznań 61-614, PolandDepartment of Water Protection, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, Poznań 61-614, PolandDepartment of Water Protection, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, Poznań 61-614, PolandDepartment of Water Protection, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, Poznań 61-614, PolandSzczecin City Office, ZDiTM, Armii Krajowej 1, Szczecin 70-456, PolandGroundwater intake near Lake Głębokie, situated in the city of Szczecin in Northwestern Poland, resulted in a distinct decrease in the lake water level. Water intake from a river and a neighboring urban area led to eutrophication and a strong cyanobacterial water bloom. Both the water intake and recreation were threatened due to the possible influence of cyanobacterial toxins. The lake was subjected to three sustainable restoration methods: aeration of sediment-water; iron addition to precipitate P, and; biomanipulation. The goal of our study was to determine the changes in the taxonomic composition of phytoplankton and chemical water variables during restoration measures. A comparison of the data obtained during this research with the pre-restoration data showed that, as a result of the treatments orthophosphates decreased, rarely exceeding 0.06 mg P·L−1, and cyanobacterial water blooms disappeared. Cyanobacteria were found in the lake but they were not abundant. Chrysophytes and diatoms were the most abundant in springtime of each year. Green algae, desmids and chrysophytes were particularly abundant in summer, while cryptophytes predominated in autumn. Algae from all these groups do not pose a threat to either recreation or water intake. The deep chlorophyll maximum occurring in summer at a depth of 5 m as a result of restoration confirms the lower trophic status of the lake, alluding to mesotrophic conditions.https://www.mdpi.com/2073-4441/9/9/713biomanipulationdeep water aerationiron additionphytoplankton compositionwater supply |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Anna Kozak Ryszard Gołdyn Renata Dondajewska Katarzyna Kowalczewska-Madura Tomasz Holona |
spellingShingle |
Anna Kozak Ryszard Gołdyn Renata Dondajewska Katarzyna Kowalczewska-Madura Tomasz Holona Changes in Phytoplankton and Water Quality during Sustainable Restoration of an Urban Lake Used for Recreation and Water Supply Water biomanipulation deep water aeration iron addition phytoplankton composition water supply |
author_facet |
Anna Kozak Ryszard Gołdyn Renata Dondajewska Katarzyna Kowalczewska-Madura Tomasz Holona |
author_sort |
Anna Kozak |
title |
Changes in Phytoplankton and Water Quality during Sustainable Restoration of an Urban Lake Used for Recreation and Water Supply |
title_short |
Changes in Phytoplankton and Water Quality during Sustainable Restoration of an Urban Lake Used for Recreation and Water Supply |
title_full |
Changes in Phytoplankton and Water Quality during Sustainable Restoration of an Urban Lake Used for Recreation and Water Supply |
title_fullStr |
Changes in Phytoplankton and Water Quality during Sustainable Restoration of an Urban Lake Used for Recreation and Water Supply |
title_full_unstemmed |
Changes in Phytoplankton and Water Quality during Sustainable Restoration of an Urban Lake Used for Recreation and Water Supply |
title_sort |
changes in phytoplankton and water quality during sustainable restoration of an urban lake used for recreation and water supply |
publisher |
MDPI AG |
series |
Water |
issn |
2073-4441 |
publishDate |
2017-09-01 |
description |
Groundwater intake near Lake Głębokie, situated in the city of Szczecin in Northwestern Poland, resulted in a distinct decrease in the lake water level. Water intake from a river and a neighboring urban area led to eutrophication and a strong cyanobacterial water bloom. Both the water intake and recreation were threatened due to the possible influence of cyanobacterial toxins. The lake was subjected to three sustainable restoration methods: aeration of sediment-water; iron addition to precipitate P, and; biomanipulation. The goal of our study was to determine the changes in the taxonomic composition of phytoplankton and chemical water variables during restoration measures. A comparison of the data obtained during this research with the pre-restoration data showed that, as a result of the treatments orthophosphates decreased, rarely exceeding 0.06 mg P·L−1, and cyanobacterial water blooms disappeared. Cyanobacteria were found in the lake but they were not abundant. Chrysophytes and diatoms were the most abundant in springtime of each year. Green algae, desmids and chrysophytes were particularly abundant in summer, while cryptophytes predominated in autumn. Algae from all these groups do not pose a threat to either recreation or water intake. The deep chlorophyll maximum occurring in summer at a depth of 5 m as a result of restoration confirms the lower trophic status of the lake, alluding to mesotrophic conditions. |
topic |
biomanipulation deep water aeration iron addition phytoplankton composition water supply |
url |
https://www.mdpi.com/2073-4441/9/9/713 |
work_keys_str_mv |
AT annakozak changesinphytoplanktonandwaterqualityduringsustainablerestorationofanurbanlakeusedforrecreationandwatersupply AT ryszardgołdyn changesinphytoplanktonandwaterqualityduringsustainablerestorationofanurbanlakeusedforrecreationandwatersupply AT renatadondajewska changesinphytoplanktonandwaterqualityduringsustainablerestorationofanurbanlakeusedforrecreationandwatersupply AT katarzynakowalczewskamadura changesinphytoplanktonandwaterqualityduringsustainablerestorationofanurbanlakeusedforrecreationandwatersupply AT tomaszholona changesinphytoplanktonandwaterqualityduringsustainablerestorationofanurbanlakeusedforrecreationandwatersupply |
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