La bioaccumulation de microorganismes dans l’ambre : analyse comparée d’un ambre cénomanien et d’un ambre sparnacien, et de leurs tapis algaires et bactériens

The bio-accumulation of micro-organisms trapped in Cenomanian amber from Écommoy (Sarthe, France) and Sparnacian amber from the Corbières (Aude, France) is compared. In both cases, a felting of cyanobacteria or actinomycetes is trapped in the periphery of the piece of amber. Many other more or less isolated micro-organisms, including bacteria, mycelian filaments, protists, spores…) can be trapped. Most of the inclusions were embedded in resin under aquatic conditions, at least in very shallow water, in a freshwater (Corbières) or parallic environment (Écommoy).