''Flavobacterium flevense'' is a freshwater agar-degrading bacterium in the order
Flavobacteriales.
It is a gram-negative bacterium capable of surviving extreme cold temperatures (
psychrophilic).
It was first isolated in
IJsselmeer
The IJsselmeer (; fy, Iselmar, nds-nl, Iesselmeer), also known as Lake IJssel in English, is a closed off inland bay in the central Netherlands bordering the provinces of Flevoland, North Holland and Friesland. It covers an area of with an a ...
, an inland bay in the
Netherlands that is believed to have gradually separated from the open
North Sea.
It does not produce
flexirubin type pigments, making it an outlier in the non-marine Cytophaga-Flavobacteria species
.Therefore, it is hypothesized that ''F. flevense'' was originally a marine organism without flexirubin pigment, that gradually adapted to freshwater conditions as the seawater was supplemented with freshwater.
References
flevense
Bacteria described in 1974
{{Flavobacteria-stub