6533b839fe1ef96bd12a5b14

RESEARCH PRODUCT

Negligible effect of hypolimnetic oxygenation on the trophic state of Lake Jyväsjärvi, Finland

Jonna KuhaArja PalomäkiJ. Tapio KeskinenJuha Karjalainen

subject

0106 biological sciencesChlorophyll aChlorophyll ata1172chemistry.chemical_elementyear-round oxygenation010501 environmental sciencesAquatic Science01 natural scienceschemistry.chemical_compoundNutrientnutrientsautomated monitoring0105 earth and related environmental sciencesTrophic levelHydrology010604 marine biology & hydrobiologyPhosphorusOxygenationchemistryMonitoring datadissolved oxygenEnvironmental scienceta1181HypolimnionSurface water

description

Abstract Hypolimnetic oxygenation by pumping oxygen-rich surface water to the hypolimnion (HLO) is a commonly used tool for the restoration of nutrient-loaded dimictic lakes. However, in recent years its effectiveness has been questioned. In this case study we evaluated monitoring data covering a period of 23-years to show that, although experimental cessation of HLO drastically changed the lake's temperature and dissolved oxygen regimes, it did not significantly affect its trophic status. Thus, we recommend that the limited financial resources available are better directed towards further lowering the lake's external phosphorus load than continuing HLO.

yearjournalcountryeditionlanguage
2016-05-01Limnologica
10.1016/j.limno.2016.02.001https://doi.org/10.1016/j.limno.2016.02.001