Trajectories of Sediment-Water Interactions in Reservoirs as a Result of Temperature and Oxygen Conditions
Temperate lakes/reservoirs are warming; this can influence the benthic release of nutrients. They undergo seasonal changes resulting in an array of temperature and oxygen conditions; oxic-low, oxic-high, anoxic-low, and anoxic-high temperature. We sought to understand the interaction of temperature...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-04-01
|
| Series: | Water |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4441/12/4/1065 |
| _version_ | 1797571146012426240 |
|---|---|
| author | Tallent Dadi Karsten Rinke Kurt Friese |
| author_facet | Tallent Dadi Karsten Rinke Kurt Friese |
| author_sort | Tallent Dadi |
| collection | DOAJ |
| description | Temperate lakes/reservoirs are warming; this can influence the benthic release of nutrients. They undergo seasonal changes resulting in an array of temperature and oxygen conditions; oxic-low, oxic-high, anoxic-low, and anoxic-high temperature. We sought to understand the interaction of temperature and oxygen conditions on benthic solutes exchange through a two-factorial sediment core incubation experiment by varying either temperature or oxygen conditions of sediment cores from an oligotrophic and eutrophic reservoir. Temperature and oxygen conditions are both important for nutrient release; however, they influence solutes differently; differences in the fluxes of the treatments were explained more by temperature for P, DOC and N, while for Fe, Mn and SO<sub>4</sub><sup>2−</sup>, differences were explained more by oxygen conditions. The combination of strongly reducing conditions (due to anoxia) and high temperature (20 °C) led to a significant increase in nutrients concentrations in the overlying water. Under these conditions, SRP flux was 0.04 and 0.5 mmol m<sup>−2</sup> d<sup>−1</sup>; ammonium was 0.9 and 5.6 mmol m<sup>−2</sup> d<sup>−1</sup> for the oligotrophic and eutrophic reservoir, respectively. We observed a synergistic interaction between temperature and oxygen conditions which resulted in release of solutes from sediments. An increase in nutrients release under increasing temperatures is more likely and so are algal blooms. |
| first_indexed | 2024-03-10T20:35:19Z |
| format | Article |
| id | doaj.art-b282870c4f8f4c03a9d3aa5467b3480a |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T20:35:19Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-b282870c4f8f4c03a9d3aa5467b3480a2023-11-19T21:05:35ZengMDPI AGWater2073-44412020-04-01124106510.3390/w12041065Trajectories of Sediment-Water Interactions in Reservoirs as a Result of Temperature and Oxygen ConditionsTallent Dadi0Karsten Rinke1Kurt Friese2UFZ-Helmholtz Centre for Environmental Research, Department Lake Research, Brueckstr. 3a, D-39114 Magdeburg, GermanyUFZ-Helmholtz Centre for Environmental Research, Department Lake Research, Brueckstr. 3a, D-39114 Magdeburg, GermanyUFZ-Helmholtz Centre for Environmental Research, Department Lake Research, Brueckstr. 3a, D-39114 Magdeburg, GermanyTemperate lakes/reservoirs are warming; this can influence the benthic release of nutrients. They undergo seasonal changes resulting in an array of temperature and oxygen conditions; oxic-low, oxic-high, anoxic-low, and anoxic-high temperature. We sought to understand the interaction of temperature and oxygen conditions on benthic solutes exchange through a two-factorial sediment core incubation experiment by varying either temperature or oxygen conditions of sediment cores from an oligotrophic and eutrophic reservoir. Temperature and oxygen conditions are both important for nutrient release; however, they influence solutes differently; differences in the fluxes of the treatments were explained more by temperature for P, DOC and N, while for Fe, Mn and SO<sub>4</sub><sup>2−</sup>, differences were explained more by oxygen conditions. The combination of strongly reducing conditions (due to anoxia) and high temperature (20 °C) led to a significant increase in nutrients concentrations in the overlying water. Under these conditions, SRP flux was 0.04 and 0.5 mmol m<sup>−2</sup> d<sup>−1</sup>; ammonium was 0.9 and 5.6 mmol m<sup>−2</sup> d<sup>−1</sup> for the oligotrophic and eutrophic reservoir, respectively. We observed a synergistic interaction between temperature and oxygen conditions which resulted in release of solutes from sediments. An increase in nutrients release under increasing temperatures is more likely and so are algal blooms.https://www.mdpi.com/2073-4441/12/4/1065internal P loadingnutrients (N and P)lake/reservoir warmingbenthic exchangeanoxia |
| spellingShingle | Tallent Dadi Karsten Rinke Kurt Friese Trajectories of Sediment-Water Interactions in Reservoirs as a Result of Temperature and Oxygen Conditions Water internal P loading nutrients (N and P) lake/reservoir warming benthic exchange anoxia |
| title | Trajectories of Sediment-Water Interactions in Reservoirs as a Result of Temperature and Oxygen Conditions |
| title_full | Trajectories of Sediment-Water Interactions in Reservoirs as a Result of Temperature and Oxygen Conditions |
| title_fullStr | Trajectories of Sediment-Water Interactions in Reservoirs as a Result of Temperature and Oxygen Conditions |
| title_full_unstemmed | Trajectories of Sediment-Water Interactions in Reservoirs as a Result of Temperature and Oxygen Conditions |
| title_short | Trajectories of Sediment-Water Interactions in Reservoirs as a Result of Temperature and Oxygen Conditions |
| title_sort | trajectories of sediment water interactions in reservoirs as a result of temperature and oxygen conditions |
| topic | internal P loading nutrients (N and P) lake/reservoir warming benthic exchange anoxia |
| url | https://www.mdpi.com/2073-4441/12/4/1065 |
| work_keys_str_mv | AT tallentdadi trajectoriesofsedimentwaterinteractionsinreservoirsasaresultoftemperatureandoxygenconditions AT karstenrinke trajectoriesofsedimentwaterinteractionsinreservoirsasaresultoftemperatureandoxygenconditions AT kurtfriese trajectoriesofsedimentwaterinteractionsinreservoirsasaresultoftemperatureandoxygenconditions |