What is the minimum LDA score I can take for LefSe analysis?

Question

[dpc]

Hi, I am doing differential abundance analysis and finding out biomarker from gut metagenomic sequences. For biomarker analysis, I am using the LefSe tool which has a default LDA score of 2.00. Can I lower this cut-off and still can consider significantly different taxa as a biomarker? If yes, which minimum value I can take?

Thanks