An indoor pelagic mesocosm facility to simulate multiple water-column characteristics
| Autor: | Ulf Båmstedt, Henrik Larsson |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Population Light spectrum 010501 environmental sciences Aquatic Science Aquatic mesocosm 01 natural sciences lcsh:Aquaculture. Fisheries. Angling Mesocosm Turbulent mixing Pycnocline strength Water column lcsh:QH540-549.5 Thermal convection education 0105 earth and related environmental sciences Hydrology lcsh:SH1-691 education.field_of_study Primary production Bacterial oxygen depletion 010604 marine biology & hydrobiology Aquatic ecosystem Pelagic zone Miljövetenskap Important research Aquatic mesocosms Environmental science lcsh:Ecology Organization level Environmental Sciences |
| Zdroj: | International Aquatic Research, Vol 10, Iss 1, Pp 13-29 (2018) |
| Popis: | Mesocosms are important research tools in aquatic ecology because they close the gap between laboratory studies at the individual or lower organization level and field studies at the population and ecosystem level. However, most mesocosm studies regarding the pelagic environment do not consider the effects of physical factors like water-column stratification, turbulence and mixing. Neglecting such factors might bias the results compared to the natural system. Using a unique indoor mesocosm facility, we present results on how different water-column stratifications can be made and how they act as barriers for exchange between water layers. Turbulent mixing, simulated by vertically rotating incubation vessels, is shown to be of high importance for primary production, generating up to nine times higher production in humus-rich water than incubation vessels at fixed depths. Convective stirring is shown to be an attractive method for generating different turbulence conditions, and different temperature settings can be used to get turnover times from 84 h or more down to 17 min for a 5-m water parcel. We also demonstrate how an anoxic bottom layer can be achieved by stimulating heterotrophic bacteria through addition of bioavailable organic carbon. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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