How do you estimate parts of the biofilm being sediments or dead organic material of biomass collected from river stones?

28 March 2023 1 2K Report

We measured chlorophyll, dry mass and ash-free dry mass and after we calculated autotrophic index (AI). I found in Hauer, F. R., & G. A. Lamberti, 2017. Methods in stream ecology. Elsevier, San Diego, California: “Hotchkiss and Hall (2015), for example, estimated that only 7-20% of the biofilm biomass they studied was metabolically active.”

Phil Geis

Please define "metabolically active". Are they just addressing the biological entities?

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