I would like to convert the oxygen content given in mg/l into the unit of measurement ml/l and vice versa. How do I do this?
Your question devolves to the mg of N/mL. Plenty of sources but pressure must be given
Needs of oxygen to generate energy, e.g. for metabolic maintenance.
A Fish needs of oxygen to generate energy, e.g. for metabolic maintenance. The critical concentration for fish is generally given as 3 mg /l. In a database for the Baltic Sea, however, oxygen concentrations are given in ml/litre. I therefore need an equation that allows me to estimate whether fish are able to metabolise food taken in at a certain depth or not. An easy-to-understand explanation would be most welcome.
1 mg/l = 22.391 ml/31.998 = 0.700 ml/l.
for more details see the links below :
https://www.ices.dk/data/tools/Pages/Unit-conversions.aspx
https://rainbow.ldeo.columbia.edu/dl/QA/43.html
Thank you very much for your answer. That helps me. I have downloaded the following document:
ICES (2022). Baltic Sea Ecoregion – Ecosystem overview. ICES Advice: Ecosystem Overviews. Report. https://doi.org/10.17895/ices.advice.21725438.v1
There is picture 14.
Figure 14 Extent of hypoxic and anoxic bottom water in the central Baltic and Gulf of Finland in August to October, 1960–2017.
The oxygen concentrations are given there in ml/l. In my opinion, the figures are not relevant, as the measured values in mg/l are a measure of whether or not the habitat is suitable for fish. According to my calculations (which, however, have not yet been finalised), it is very relevant whether, for example, 2 ml/l are measured at the surface or at a water depth of 100 metres. I am still looking for publications on this so that I can familiarise myself further.
Thank you very much, Eckhard
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