Crystal Geyser graph: distinguish lipid-acquisition hypotheses from measured transfer #1365

CommunityMech:000252, kb/communities/Crystal_Geyser_CO2_Aquifer_CPR_Lipid_Community.yaml.

The graph's SYNTROPHY label asserts product-removal cooperation not demonstrated by this field study; COMMENSALISM on lysolipid curvature adaptation likewise invents a donor fitness sign. The lipid-transfer arrow treats imported material as established. The source instead combines stable carbon isotopes, genome content, lipid correlations, mixed size-fraction lipidomics and FTIR. It explicitly leaves possible ACP-independent biosynthesis open in some Nealsonbacteria and proposes scavenging degraded biomass or host-derived lipids. CPR-enriched fractions are not pure CPR isolates, and correlation does not identify a donor or trace lipid transfer. Depth-associated unsaturation does not demonstrate that donor mechanism or a pressure perturbation response.

Acceptance: retain all three nodes and two source-proposed causal links with explicit PARTIAL/HYPOTHESIZED boundaries; preserve the positive mostly-autotrophic carbon evidence. Distinguish broad producer-pool context from resolved bacterial/archaeal donors, retain CPR-associated lysolipid observations without tested curvature benefit, and preserve canonical taxon groundings. Remove unsupported categorical syntrophy/commensalism, qualify the possible alternative biosynthesis and donor routes in a focused gap, and add guarded curation history, tests and rendered-page checks. No new nodes/arrows or Edison spend is needed for this repair.

Primary source: https://doi.org/10.1038/s41396-020-0624-4 (Probst et al., 2020; PMID:32203118; PMC7242380; CC BY 4.0). Complete cached independently retrieved main body, table and captions read; no figure images or supplementary files inspected. Dedup: 698 all-state issue titles/bodies and ignored/hidden-inclusive reports, research, history, tests, scripts and .github search. No exact finding in this scope; not every issue comment was searched. Self-adversarial review, not independent approval.