A shallow lake in an agricultural landscape – water quality, nutrient loads, future management
Qualitative analyses of nitrogen and phosphorus loads reaching the lake ecosystem provide a basis for pollution control, which is of paramount importance in shallow lakes due to the rapid turn-over of matter and energy. The studies of both external and internal loading were conducted in Lake Łeknens...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Limnological Review |
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| Online Access: | http://www.degruyter.com/view/j/limre.2019.19.issue-1/limre-2019-0003/limre-2019-0003.xml?format=INT |
| _version_ | 1797327117579452416 |
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| author | Dondajewska Renata Gołdyn Ryszard Messyasz Beata Kowalczewska-Madura Katarzyna Cerbin Sławek |
| author_facet | Dondajewska Renata Gołdyn Ryszard Messyasz Beata Kowalczewska-Madura Katarzyna Cerbin Sławek |
| author_sort | Dondajewska Renata |
| collection | DOAJ |
| description | Qualitative analyses of nitrogen and phosphorus loads reaching the lake ecosystem provide a basis for pollution control, which is of paramount importance in shallow lakes due to the rapid turn-over of matter and energy. The studies of both external and internal loading were conducted in Lake Łeknenskie, a very shallow, through-flow lake situated in Western Poland. Strong eutrophication is manifested in rich rush vegetation and a lack of submerged macrophytes as well as nitrogen and phosphorus concentrations (max 13.04 mg N dm−3 and 0.32 mg P dm−3, respectively). Constant domination of cyanobacteria in the phytoplankton community was noted in almost all seasons with a 98% share in summer, resulting in 20 cm water transparency and 223 μg dm−3 of chlorophyll-a. The zooplankton community was dominated by rotifers. The main source of nutrients was the River Nielba. Spatial external nutrient loading was 1.93 g P m−2 yr−1 and 77.55 g N m−2 yr−1. An even higher load of phosphorus was released from the bottom sediments, 2.18 g P m−2 yr−1. A comprehensive action plan is required, aiming at the reduction of both external and internal nutrient loading. A series of solutions regarding local environmental conditions should be applied in the lake catchment, including biogeochemical barriers, denitrification walls, artificial retention basins or wetlands, but most of all – improvement in the functioning of the wastewater treatment plant. Restoration is possible, however, protection measures reducing external loading should be undertaken prior to phosphorus inactivation in the water column and in the bottom sediments, supported by biological methods e.g. biomanipulation. |
| first_indexed | 2024-03-08T06:33:50Z |
| format | Article |
| id | doaj.art-e9896777d79d420e82dc0b39ad88a2ec |
| institution | Directory Open Access Journal |
| issn | 2300-7575 |
| language | English |
| last_indexed | 2024-03-08T06:33:50Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Limnological Review |
| spelling | doaj.art-e9896777d79d420e82dc0b39ad88a2ec2024-02-03T11:09:31ZengMDPI AGLimnological Review2300-75752019-03-01191253510.2478/limre-2019-0003limre-2019-0003A shallow lake in an agricultural landscape – water quality, nutrient loads, future managementDondajewska Renata0Gołdyn Ryszard1Messyasz Beata2Kowalczewska-Madura Katarzyna3Cerbin Sławek4Department of Water Protection, Adam Mickiewicz University, Faculty of Biology, Umultowska 89, 61-614Poznań, PolandDepartment of Water Protection, Adam Mickiewicz University, Faculty of Biology, Umultowska 89, 61-614Poznań, PolandDepartment of Hydrobiology, Adam Mickiewicz University, Faculty of Biology, Umultowska 89, 61-614Poznań, PolandDepartment of Water Protection, Adam Mickiewicz University, Faculty of Biology, Umultowska 89, 61-614Poznań, PolandDepartment of Hydrobiology, Adam Mickiewicz University, Faculty of Biology, Umultowska 89, 61-614Poznań, PolandQualitative analyses of nitrogen and phosphorus loads reaching the lake ecosystem provide a basis for pollution control, which is of paramount importance in shallow lakes due to the rapid turn-over of matter and energy. The studies of both external and internal loading were conducted in Lake Łeknenskie, a very shallow, through-flow lake situated in Western Poland. Strong eutrophication is manifested in rich rush vegetation and a lack of submerged macrophytes as well as nitrogen and phosphorus concentrations (max 13.04 mg N dm−3 and 0.32 mg P dm−3, respectively). Constant domination of cyanobacteria in the phytoplankton community was noted in almost all seasons with a 98% share in summer, resulting in 20 cm water transparency and 223 μg dm−3 of chlorophyll-a. The zooplankton community was dominated by rotifers. The main source of nutrients was the River Nielba. Spatial external nutrient loading was 1.93 g P m−2 yr−1 and 77.55 g N m−2 yr−1. An even higher load of phosphorus was released from the bottom sediments, 2.18 g P m−2 yr−1. A comprehensive action plan is required, aiming at the reduction of both external and internal nutrient loading. A series of solutions regarding local environmental conditions should be applied in the lake catchment, including biogeochemical barriers, denitrification walls, artificial retention basins or wetlands, but most of all – improvement in the functioning of the wastewater treatment plant. Restoration is possible, however, protection measures reducing external loading should be undertaken prior to phosphorus inactivation in the water column and in the bottom sediments, supported by biological methods e.g. biomanipulation.http://www.degruyter.com/view/j/limre.2019.19.issue-1/limre-2019-0003/limre-2019-0003.xml?format=INTshallow lakenitrogen and phosphorus loadingphytoplanktonzooplankton |
| spellingShingle | Dondajewska Renata Gołdyn Ryszard Messyasz Beata Kowalczewska-Madura Katarzyna Cerbin Sławek A shallow lake in an agricultural landscape – water quality, nutrient loads, future management Limnological Review shallow lake nitrogen and phosphorus loading phytoplankton zooplankton |
| title | A shallow lake in an agricultural landscape – water quality, nutrient loads, future management |
| title_full | A shallow lake in an agricultural landscape – water quality, nutrient loads, future management |
| title_fullStr | A shallow lake in an agricultural landscape – water quality, nutrient loads, future management |
| title_full_unstemmed | A shallow lake in an agricultural landscape – water quality, nutrient loads, future management |
| title_short | A shallow lake in an agricultural landscape – water quality, nutrient loads, future management |
| title_sort | shallow lake in an agricultural landscape water quality nutrient loads future management |
| topic | shallow lake nitrogen and phosphorus loading phytoplankton zooplankton |
| url | http://www.degruyter.com/view/j/limre.2019.19.issue-1/limre-2019-0003/limre-2019-0003.xml?format=INT |
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