Bound propanotroph causal graph to abstract-supported selection and removal #1724

CommunityMech:000271; doi:10.1016/j.jenvman.2026.129957. Retain four nodes and three existing directions, with measured contaminant removal and taxonomic selection intact. Remove CROSS_FEEDING and COMPETITION categories unsupported by evidence of partner exchange or fitness competition. Dominant genera and monooxygenase gene content do not identify active enzymes; expression was not examined. Qualify selection-to-function and inhibition-to-selection mediation. Remove unavailable detailed kinetic/operon assertions from graph descriptions, not taxonomy or other scientific fields. Fresh primary abstract only; subscription body not retrieved. Broader non-graph debt remains #765. Close only after protected-main merge.

All-state issue titles/bodies searched by IDs, references and stems. Ignored/hidden local search included, excluding .git/docs/site/references_cache; relevant caches separately inspected. Closed #1189-#1192 and earlier validation/rendering issues do not cover these findings. Existing #765 owns broader propanotroph re-evidencing after #754; no duplicate non-graph issue filed for that scope. Comments and PRs not exhaustively searched. Source-based self-adversarial review, not independent approval.