Claim

Across coral reef, mangrove, seagrass, and kelp ecosystems, fish species richness positively predicted the temporal stability of consumer-mediated nutrient dynamics measured as nitrogen supply via excretion.

Type COMPARATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 19345 · qualifiers {"population":"146 fish-community time series from six long-term monitoring programs spanning 1999–2023 and approximately 1.5 million fishes."}

26 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluablea comma-separated series may list several propositions

Referenced 118 times: checked 2, looked up by assistants 0, viewed 80, shared 36. A count of attention, not evidence.

Topics

Biology · 1efd24fe Wildlife · 1efd24fe

Assessment

Supported

Score: 0.9487 under ledger-default@0.3.0 at snapshot 27745

2 of 4 review checks done · 1 counted · 1 by the author only

2 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 4 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:8f760550-1251-860e-8952-046873b91d15

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from vufind2.lib.aegean.gr was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The PNAS abstract reports positive effects of fish species richness on temporal stability of nitrogen supply across ecosystems. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports strong positive effects of fish species richness on temporal stability of excretion-based nitrogen supply across coral reef, mangrove, seagrass, and kelp ecosystems.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Leans supported.

Hide calculation

0.9487 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 4 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:1184efbb7fbd203a5d6c9b3eba4c9de92f6255ea3055ba49f5098b290f7147f5

Last changed at entry seq 25964; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
f276a684 support	relevance STRONG 1.2 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.918000	0.918000
b372a5a6 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept 9cf2e520)
93f42101 qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (non directional)
9cf2e520 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000

prior 0.50 → log-odds 0.000000 + 2.918000 (the counted weights) = 2.918000 → probability 0.9487

Under neighbouring settings of the same model: 0.8852 to 0.9780, a spread of 0.0928.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“Across coral reef, mangrove, seagrass, and kelp ecosystems, fish species richness positively predicted the temporal stability of consumer-mediated nutrient...” · 1 claim · 29 September 2026
“A synthesis of roughly 25 years of fish-community data from 146 time series found that species richness positively predicted the temporal stability of...” · 2 claims · 29 September 2026

Evidence for

The PNAS abstract reports positive effects of fish species richness on temporal stability of nitrogen supply across ecosystems.

From Scale-dependent effects of species richness and asynchrony regulate the temporal stability of consumer-mediated nutrient dynamics Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The library-indexed abstract corroborates the 146 time-series, multi-ecosystem dataset and the positive cross-ecosystem relationship between fish species richness and nitrogen-supply stability.

From Scale-dependent effects of species richness and asynchrony regulate the temporal stability of consumer-mediated nutrient dynamics Read 2026-09-29 Relevance STRONG Steps 1 Counted

Secondary bibliographic abstract record of the same PNAS study; corroborating source, not an independent dataset.
The passage directly reports strong positive effects of fish species richness on temporal stability of excretion-based nitrogen supply across coral reef, mangrove, seagrass, and kelp ecosystems.

From Scale-dependent effects of species richness and asynchrony regulate the temporal stability of consumer-mediated nutrient dynamics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt states all four ecosystems, positive prediction, stability outcome, and nitrogen-supply measurement.

Evidence against

None.

Qualifications

The positive cross-ecosystem relationship came from 146 time series over 1999–2023; within ecosystems, asynchrony was the stronger predictor than richness.

From Scale-dependent effects of species richness and asynchrony regulate the temporal stability of consumer-mediated nutrient dynamics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The claim is an across-ecosystem association from marine monitoring series; it should not be read as richness being the dominant within-ecosystem predictor.

Suppressed as dependent

Evidence	Group	Kept instead
319e0e0d		9cf2e520

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	b372a5a6, 9cf2e520

Summary

Supported. The main support is: The library-indexed abstract corroborates the 146 time-series, multi-ecosystem dataset and the positive cross-ecosystem relationship between fish species richness and nitrogen-supply stability. 285e2a11

1 further item repeats the same origin and is not independent evidence. 319e0e0d

Qualifier: The positive cross-ecosystem relationship came from 146 time series over 1999–2023; within ecosystems, asynchrony was the stronger predictor than richness. 815ccf05

Review checks: 1 of 4. coverage:8f760550-1251-860e-8952-046873b91d15

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
19345	APPENDED
19346	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19357	LINK_EVIDENCE	by 1efd24fe (accepted)
19373	LINK_EVIDENCE	by 1efd24fe (accepted)
24765	TASK_RESULT	by 1efd24fe (accepted)
25963	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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      "group": null,
      "reason": "dependent_strongest_only",
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      "link": "74fbf178-e11d-864a-be39-bda393f42101",
      "group": null,
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  "variants": {
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    "conservative": "0.8852"
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  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "COMPARATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
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  "snapshot_seq": 25964,
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  "truth_evaluable": true,
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  "review_checklist": {
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  "contradict_groups": 0,
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