Phosphorus Functional Microorganisms and Genes: A Novel Perspective to Ascertain Phosphorus Redistribution and Bioavailability During Copper and Tetracycline-Stressed Composting

•Cu and TCH-amended composting resulted in an 10% reduction in P-bioavailability.•Ex-P was converted into Ca-P during the composting process.•Cu and TCH increased TP and Or-P content in composting end-products.•Cu and TCH significantly affect fungal succession, but not to bacteria.•Cu and TCH motivated the phosphorus functional genes in bacterial communities.