Table S7. Phylum-level relative abundance (%) per sample								
"All 39 phyla detected (incl. ""Unclassified"" = no confident Phylum call at minBoot=80), ranked by mean abundance across the 7 samples. Formal values were reaggregated from seqtab_final_long.csv joined by exact ASV sequence to taxa_silva144.csv (DADA2/SILVA release 144; minBoot=80)."								
								
Phylum	1st_BFP	1st_BFW1	1st_BFW2	2nd_BFP	2nd_BFW	2nd_wt	3rd_wt	Mean_pct
Pseudomonadota	53.97821484	58.13077952	64.41447873	27.32671923	32.65777847	60.40274889	75.92671217	53.26249027
Thermoplasmatota	3.179340663	0.269627913	1.551930319	3.485412401	44.22186028	21.64895096	9.688973078	12.00658509
Unclassified	8.396894637	7.999960055	1.926749603	39.11558085	1.648249832	2.066460276	1.437016232	8.941558783
Nitrospirota	11.30073212	11.80870399	17.79052957	7.792119642	4.142081086	3.571257416	3.915869232	8.617327579
Bacillota--other	7.157130345	1.782540095	1.350241848	13.96653733	0.047789492	0.11885022	0.390824869	3.544844885
Actinomycetota	4.143601779	5.083984102	5.825762579	2.531760128	3.158982962	1.664861549	1.821309209	3.461466044
Planctomycetota	4.313665468	10.21590206	3.287700573	0.883514146	2.765938771	0.439937508	0.436548113	3.191886662
Thermoproteota	0.400499987	0.047933851	0.261481072	0.571286356	6.175572742	5.986600596	2.637795704	2.297310044
Acidobacteriota	2.846015833	3.112704468	0.991486248	3.193547292	0.875815591	0.449522203	0.635770818	1.729266065
Vulcanimicrobiota	0.855420355	0.180750564	0.638977636	0.230777063	1.626793325	0.145687366	0.130637839	0.544149164
Nanobdellota	0.080780252	0.027961413	0.02855766	0.058825526	0.150195547	1.809590446	1.120219472	0.468018616
Chloroflexota--other	0.549305715	0.188739539	0.516715155	0.127832393	1.705792282	0.054632762	0.074028109	0.459577994
Minisyncoccota	0.458321641	0.081886996	0.68627626	0.10181341	0.009752958	0.227157275	0.711976224	0.325312109
Elusimicrobiota	0.2074777	0.070902155	0.361432881	0.335984253	0.065344816	0.445688325	0.320062706	0.258127548
Cyanobacteriota	0.16921337	0.533264096	0.04551377	0.139144994	0.03901183	0.067092866	0.128460542	0.160243067
Desulfotomaculota	0.759334371	0.001997244	0.116907919	0.009050081	0.129714336	0.009584695	0.01632973	0.148988339
Candidatus Micrarchaeota	0.028060509	0.018973816	0.007139415	0.013575121	0.085826027	0.41597577	0.310264868	0.125687932
Clostridiota	0.674302526	0.00499311	0.071394149	0	0	0.002875409	0	0.107652171
Candidatus Binatota	0.061222928	0.012982085	0.024987952	0.040725364	0.207737997	0.076677561	0.062052974	0.069483837
Candidatus Babelota	0.064624202	0.16277537	0.009816696	0.050906705	0.06436952	0.012460104	0.013063784	0.05400234
Sva0485	0	0.011983463	0	0	0.040962422	0.212780233	0.099067028	0.052113306
Chlamydiota	0.021257961	0.166769858	0.015171257	0.011312601	0.009752958	0.064217458	0.050077838	0.048365704
Myxococcota	0.176866236	0.008987597	0.011601549	0.010181341	0	0.010543165	0.004354595	0.03179064
Spirochaetota	0.02721019	0	0.007139415	0.00339378	0.159948504	0.001916939	0	0.028515547
Bacteroidota	0.04931847	0.06291318	0.024095525	0	0	0.013418573	0.031570811	0.025902366
Chlorobiota	0.01105414	0	0.01427883	0	0.005851775	0.035463372	0.011975135	0.011231893
Lentisphaerota	0.028910827	0	0	0	0	0.015335512	0.010886487	0.007876118
Deinococcota	0.028060509	0	0.003569707	0	0	0	0	0.004518602
Verrucomicrobiota	0	0	0.004462134	0	0	0.009584695	0.005443243	0.002784296
Gemmatimonadota	0.002550955	0.001997244	0	0	0	0.008626226	0.003265946	0.002348624
Armatimonadota	0	0.006990353	0.007139415	0	0	0.001916939	0	0.002292387
Desulfobacterota	0.007652866	0	0.002677281	0	0	0.001916939	0	0.001749584
Bacillota	0.003401274	0.002995866	0	0	0.004876479	0	0	0.001610517
Candidatus Omnitrophota	0.002550955	0	0	0	0	0.002875409	0.005443243	0.001552801
Thermodesulfobiota	0.009353503	0	0	0	0	0	0	0.001336215
Bdellovibrionota--other	0.005952229	0	0	0	0	0	0	0.000850318
Mycoplasmatota	0	0	0	0	0	0.004792348	0	0.000684621
Bdellovibrionota	0	0	0.001784854	0	0	0	0	0.000254979
Kiritimatiellota	0.001700637	0	0	0	0	0	0	0.000242948