The Living Ledger — Semiotic

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The Living Ledger

Ecosystem services / curated 180-day replay

The Living Ledger

You think you're looking at a map of nature. You're not. You're looking at the work ecosystems do, who depends on it, and how sure we are that it is changing.

A forest can remain standing while a service declines. A service can keep working only because people and infrastructure are propping it up. And sometimes a satellite has seen a disturbance but nobody can honestly say yet what service has failed.

Field ledger 07 / 12Jul 12, 2026100%

A deterministic teaching dataset. It does not report current conditions.

Day 180 / 180Jul 12, 2026

Preparing the atlas…

Regulation + maintenance

Provisioning

Non-material

Watch

Warning

Action

Stale / unknown

Public lens

Start with the service people rely on

The flowers are service stations, not a score for nature. Choose one to see what is changing, where it matters, and how sure the evidence is.

Selected: Reef 14
Who is affected: 186K people
How sure: high

Service sentence

9 visible · 9bioregions

Action

What changed

Reef 14

Reef 14 reached 9.6 °C-weeks of accumulated heat stress.

Where: Mesoamerican Caribbean
Evidence: validated threshold
Confidence: high
Exposed: 186K people

Alert desk

The claims that currently need attention

6 service systems are at Watch or higher. Data-quality alerts stay separate.

AT A GLANCE / 02

Service balance

Is nature still keeping up?

Each mark compares the condition of nature with whether the service is keeping up for people.

Mark size shows how many people or livelihoods are exposed. Color shows the alert level.

WHAT CHANGED / 03

Service story

What has changed over time?

Recorded values tell a clearer story than a single score. The alert line is a rule, not proof that the whole service has failed.

180 recorded values for Reef 14. The alert line marks a rule; it does not prove the whole service has failed.

recorded changealert rule

SIX PARTS / 04

The Living Ledger

The service is not one number

Supply, demand, use, and value are related. They are not interchangeable. When the units do not line up, there is no ratio.

Six evidence cells. Their units are not assumed to be commensurable, so the chart does not calculate a total or supply-demand ratio.

Any adequacy ratio shown here is defined only inside this service model and is not transferable.

FORWARD / BACKWARD / 05

Dependency / Evidence Web

What depends on this?

One network follows consequences forward. The other follows the claim backward.

8 nodes and 7 connections. This view follows consequences forward.

BEFORE A CLAIM / 06

A careful evidence journey

How a signal earns a claim

A reading is checked before it can inform an indicator. Any unresolved record keeps the statement limited.

How a reading earns a careful claim

One selected service system · 6 replay records

1
A reading arrives
6 records from this service system entered the replay.
2
We check it before using it
6 records have passed the checks in this replay.
3
Then we make a limited statement
The checked records can inform an indicator, not a promise about the whole service.

Read the latest pipeline events

Jun 13Community access assessmentaccepted
Apr 14Community access assessmentaccepted
Feb 13Community access assessmentaccepted
May 26Canopy cooling deltaaccepted
Apr 12Canopy cooling deltaaccepted
Feb 7Canopy cooling deltaaccepted

Three warnings, three different claims

This contrast is the point

Inspect the claim

Why the warning exists

Reef 14 reached 9.6 °C-weeks of accumulated heat stress.

This threshold supports a heat-stress claim. Coastal-protection loss is modeled.

Threshold registry

Definition: coral-heat-dhw
Authority: NOAA Coral Reef Watch
Scope: coral-reef
Aggregation: rolling-12-week
Transferable: no, by default

Evidence sources

NOAA Coral Reef Watch Degree Heating Weekecosystem-condition, ecological-capacity· daily
Illustrative service demand, use, beneficiary and model inputsservice-flow, demand, use, benefit, value· replay dependent

Read the service systems as a table

Accessible service-system projection
Region	Condition	Adequacy	Claim	Confidence	Freshness
Mesoamerican Caribbean	51	87%	validated-threshold	high	current
Lower Danube	72	114%	forecast-crossing	medium	current
Humboldt Current	64	88%	trend-change	medium	current
Congo Basin	76	not comparable	reference-anomaly	high	current
Ganges–Brahmaputra Delta	78	102%	trend-change	medium	aging
California Central Valley	58	94%	trend-change	medium	current
Chesapeake Bay	74	not comparable	trend-change	medium	current
Whanganui River corridor	77	not comparable	trend-change	medium	aging
Southern California urban region	68	97%	data-observability	low	stale

Snapshot living-ledger-2026-07

Every source declares its role. A pressure does not get quietly renamed as an outcome.

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