{ "model": { "rank": 6428, "code": "thing-q156698", "model_id": "vr.tr.eutrophication", "name": "eutrophication", "purpose": "Enable an AI agent to recognise nutrient-driven increases in aquatic production, assess their extent and consequences, and identify justified monitoring or mitigation actions.", "family": "Thing Registry", "category": "Information and virtual systems", "status": "research-draft", "kind": "thing", "plane": "INF", "domain": "INF.MED", "industry": "", "version": "", "url": "/models/thing/q156698/", "tier": 2, "score": 60, "payload": { "layer": "wikidata", "aliases": [ "harmful algal bloom" ], "aliasCount": 1, "merged": 1, "knownIn": 60, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": "vr.tr.eutrophication", "source": { "dataset": "wikidata", "item": "Q156698", "url": "https://www.wikidata.org/wiki/Q156698", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-07T14:29:57Z", "providers": [ "Codex", "Grok" ], "missingProviders": [], "pass": 2, "cost": { "grok": { "usd": 0.00777988, "turns": 1, "seconds": 128.8, "error": null }, "codex": { "seconds": 85.2, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a07c42-2e90-7271-ba75-6b44c80510d2\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: eutrophication\nRegistry id: vr.tr.eutrophication\nPlane / domain: XCT / XCT.STA\nRegistry definition: (none recorded)\nNames folded into this entry: (no" } } }, "metaModel": { "id": "THING-Q156698", "registryId": "vr.tr.eutrophication", "name": "eutrophication", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.STA" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q156698/", "model": { "registry_id": "vr.tr.eutrophication", "name": "eutrophication", "purpose": "Enable an AI agent to recognise nutrient-driven increases in aquatic production, assess their extent and consequences, and identify justified monitoring or mitigation actions.", "definition": "Eutrophication is an increase in the rate of supply of organic matter to an aquatic ecosystem, usually driven by anthropogenic enrichment with nitrogen and phosphorus, that stimulates primary production and, through subsequent respiration and decay, alters oxygen regimes, transparency, and community structure.", "scope_statement": "This model owns the recognition, causal assessment, state and management needs of eutrophication under vr.tr.eutrophication, within a specified aquatic system and assessment period; it links to the waterbody, nutrient sources, affected organisms and interventions.", "in_scope": [ "Evidence connecting nutrient enrichment to increased algal or aquatic plant production", "Spatial extent, seasonal expression and progression relative to an explicit reference condition", "External nutrient delivery, internal recycling and environmental controls on biological response", "Associated oxygen depletion, light loss and ecological changes where attribution is supported", "Intervention selection, response monitoring and uncertainty about recovery" ], "out_of_scope": [ "Complete physical and hydrological description of the receiving waterbody", "Operation and regulation of farms, wastewater systems and other nutrient sources", "Algal species taxonomy, bloom identification and toxin-specific hazard assessment", "Hypoxia caused independently by physical isolation or direct organic waste inputs", "General biodiversity assessment and individual organism health", "Engineering design, procurement and operation of treatment infrastructure" ], "distinguishing_features": [ "Require evidence of a nutrient-related biological response; elevated nutrient concentration alone records enrichment but does not establish the response.", "Separate a eutrophic condition from demonstrated eutrophication over time: a single productive-water observation does not establish deterioration or human causation.", "Treat an algal bloom as a possible manifestation rather than an equivalent diagnosis; assess its nutrient connection, and establish harmfulness or toxicity separately.", "For low oxygen, test the pathway through nutrient-stimulated production and subsequent oxygen demand against competing physical and organic-loading explanations.", "For reduced clarity, distinguish algal biomass from suspended mineral sediment or dissolved colour before assigning eutrophication." ], "characteristics": [ { "name": "Assessment footprint and period", "kind": "relation", "unit_or_values": "Linked waterbody, mapped reach or volume, depth interval, start and end dates", "why_it_matters": "Prevents observations from different seasons, depths or connected waters being treated as one uniform condition." }, { "name": "Reference condition", "kind": "category", "unit_or_values": "Historical baseline, comparable reference site, type-specific expectation or unknown; record selection basis", "why_it_matters": "Makes the meaning of enrichment and change explicit." }, { "name": "Nutrient concentrations and fractions", "kind": "measurement", "unit_or_values": "mg N/L and mg P/L; distinguish total, dissolved and measured inorganic fractions", "why_it_matters": "Describes nutrient availability while retaining differences between analytical fractions." }, { "name": "External nutrient load", "kind": "measurement", "unit_or_values": "kg N/day and kg P/day, with integration period, flow basis and uncertainty", "why_it_matters": "Connects enrichment to delivered mass rather than relying on concentration alone." }, { "name": "Internal nutrient release", "kind": "measurement", "unit_or_values": "mg N/m²/day or mg P/m²/day; measured, modelled or unknown", "why_it_matters": "Tests whether sediment recycling could sustain enrichment after external inputs decline." }, { "name": "Producer response", "kind": "measurement", "unit_or_values": "Chlorophyll-a in µg/L, plant or macroalgal cover in %, or primary production in g C/m²/day; retain indicator identity", "why_it_matters": "Records the biological response without treating biomass and production rate as interchangeable." }, { "name": "Underwater light", "kind": "measurement", "unit_or_values": "Secchi depth in m or light attenuation coefficient in m⁻¹, with method", "why_it_matters": "Tracks light conditions while requiring evidence about the cause of reduced clarity." }, { "name": "Oxygen exposure", "kind": "measurement", "unit_or_values": "Dissolved oxygen in mg/L and % saturation; duration and affected volume below an explicitly selected threshold", "why_it_matters": "Distinguishes a brief local minimum from sustained habitat exposure." }, { "name": "Nutrient limitation", "kind": "category", "unit_or_values": "Nitrogen, phosphorus, co-limitation, other constraint, variable or unresolved; include evidence", "why_it_matters": "Supports nutrient-control choices without assuming limitation from waterbody type or ratios alone." }, { "name": "Hydrodynamic susceptibility", "kind": "measurement", "unit_or_values": "Residence time in days and stratification duration in days, with estimation basis", "why_it_matters": "Helps explain differences in response to similar nutrient inputs." }, { "name": "Assessment state", "kind": "state", "unit_or_values": "Suspected, supported, not supported or unresolved; trajectory separately increasing, stable, decreasing or unknown", "why_it_matters": "Separates confidence in recognition from direction of change." }, { "name": "Nutrient origin attribution", "kind": "category", "unit_or_values": "Natural, anthropogenic, mixed or unresolved; with supporting evidence", "why_it_matters": "Prevents a productive condition being automatically assigned a human cause." } ], "affordances": [ "Assess whether observations support eutrophication and identify missing causal evidence.", "Design sampling across nutrient delivery events, productive seasons and oxygen-sensitive depths.", "Compare nutrient-control scenarios using source contributions, limitation evidence and internal recycling.", "Flag observed oxygen or bloom conditions for assessment by the relevant hazard model.", "Recommend interventions with explicit prerequisites, authority requirements and response criteria.", "Evaluate recovery against the reference condition while accounting for weather, flow and response delays." ] }, "sources": [ { "id": "nixon-1995", "title": "Coastal marine eutrophication: a definition, social causes, and future concerns - Scott W. Nixon, Ophelia (Marine Biological Laboratory / Taylor & Francis)", "url": "", "what_it_supports": "Specialist definition as an increase in the rate of supply of organic matter; coastal/marine framing." }, { "id": "oecd-1982", "title": "Eutrophication of Waters: Monitoring, Assessment and Control - Organisation for Economic Co-operation and Development", "url": "", "what_it_supports": "OECD lake trophic classification, phosphorus-loading models, and monitoring quantities still used in practice." }, { "id": "wfd-2000", "title": "Directive 2000/60/EC establishing a framework for Community action in the field of water policy (Water Framework Directive) - European Parliament and Council", "url": "https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32000L0060", "what_it_supports": "Legal treatment of nutrient enrichment as a pressure on ecological status in EU surface waters.", "url_status": "live" }, { "id": "carlson-1977", "title": "A trophic state index for lakes - Robert E. Carlson, Limnology and Oceanography (ASLO)", "url": "", "what_it_supports": "Carlson TSI and the Secchi / chlorophyll-a / total-phosphorus quantities used to grade lake trophic state." }, { "id": "ospar-common-procedure", "title": "Common Procedure for the Identification of the Eutrophication Status of the OSPAR Maritime Area - OSPAR Commission", "url": "", "what_it_supports": "Northeast Atlantic assessment of coastal eutrophication (nutrients, chlorophyll, oxygen, nuisance algae)." } ], "structure": { "bundles": [ { "id": "recognition-and-reference", "name": "Recognition and reference", "description": "Establish what constitutes eutrophication in the assessed aquatic system and what evidence supports that interpretation.", "rationale": "An agent needs to distinguish nutrient-driven change from naturally productive water and superficially similar symptoms.", "layers": [ { "id": "assessment-boundary", "name": "Assessment boundary", "description": "Locate the process within a receiving system, depth range and meaningful time window.", "findings": [ { "id": "receiving-system-footprint", "name": "Receiving-system footprint", "description": "Record the assessed waters and connected areas that supply nutrients or receive exported effects.", "questions": [ { "text": "Which waterbody segments, depths and dates constitute this assessment?", "kind": "boundary", "id": "receiving-system-footprint-q01" }, { "text": "Which upstream, downstream or sediment connections must be represented to avoid mislocating nutrient inputs or effects?", "kind": "boundary", "id": "receiving-system-footprint-q02" } ] } ] }, { "id": "diagnostic-basis", "name": "Diagnostic basis", "description": "Make the reference condition and causal interpretation inspectable.", "findings": [ { "id": "enrichment-response-evidence", "name": "Enrichment-response evidence", "description": "Record evidence connecting nutrient enrichment to increased aquatic production and distinguish causes from response indicators. [EPA nutrient indicators](https://www.epa.gov/nutrientpollution/nutrient-indicators-dataset).", "questions": [ { "text": "What reference condition makes the observed nutrient supply or producer response elevated, and why is that reference appropriate?", "kind": "definition", "id": "enrichment-response-evidence-q01" }, { "text": "Which observations support nutrient-driven production rather than nutrient enrichment alone, natural productivity or an unrelated bloom?", "kind": "provenance", "id": "enrichment-response-evidence-q02" }, { "text": "What evidence distinguishes natural enrichment, human acceleration and unresolved origin?", "kind": "provenance", "id": "enrichment-response-evidence-q03" } ] } ] } ] }, { "id": "nutrient-supply-and-recycling", "name": "Nutrient supply and recycling", "description": "Account for nutrient delivery, availability and recycling relevant to the biological response.", "rationale": "An agent cannot identify effective controls from ambient nutrient concentration alone.", "layers": [ { "id": "external-delivery", "name": "External delivery", "description": "Identify the timing and magnitude of nutrient inputs crossing the assessment boundary.", "findings": [ { "id": "delivered-nutrient-budget", "name": "Delivered nutrient budget", "description": "Record source-linked nitrogen and phosphorus loads with transport pathways, nutrient fractions and estimation uncertainty.", "questions": [ { "text": "How much nitrogen and phosphorus reaches the assessed waters through each supported pathway over the relevant period?", "kind": "measurement", "id": "delivered-nutrient-budget-q01" }, { "text": "Which measurements or models support source attribution, and how are storm pulses and unsampled inputs represented?", "kind": "provenance", "id": "delivered-nutrient-budget-q02" } ] } ] }, { "id": "internal-availability", "name": "Internal availability", "description": "Assess nutrient recycling and evidence about which resource constrains producer growth.", "findings": [ { "id": "recycling-and-limitation", "name": "Recycling and limitation", "description": "Record sediment exchange and nutrient-limitation evidence; oxygen-poor sediments can release nutrients in some conditions. [EPA nutrient and response variables](https://archive.epa.gov/epa/nutrient-policy-data/n-steps-nutrient-and-response-variable-overviews.html).", "questions": [ { "text": "What sediment nutrient release is measured or estimated, and under which oxygen and seasonal conditions?", "kind": "measurement", "id": "recycling-and-limitation-q01" }, { "text": "What experiments or converging observations establish nitrogen limitation, phosphorus limitation, co-limitation or another growth constraint?", "kind": "provenance", "id": "recycling-and-limitation-q02" } ] } ] } ] }, { "id": "production-and-physical-controls", "name": "Production and physical controls", "description": "Characterise the producer response and the conditions governing its expression.", "rationale": "Similar nutrient loads can produce different outcomes, and observed biomass does not directly measure production.", "layers": [ { "id": "producer-expression", "name": "Producer expression", "description": "Describe which producers respond and how their abundance or production changes.", "findings": [ { "id": "growth-and-accumulation", "name": "Growth and accumulation", "description": "Track phytoplankton, attached algae, macroalgae or aquatic plants with indicators appropriate to the receiving system.", "questions": [ { "text": "Which producer groups show increased production, biomass or coverage, and relative to what seasonal baseline?", "kind": "measurement", "id": "growth-and-accumulation-q01" }, { "text": "Could observed biomass reflect transport, surface accumulation or altered grazing rather than increased local production?", "kind": "boundary", "id": "growth-and-accumulation-q02" } ] } ] }, { "id": "physical-opportunity", "name": "Physical opportunity", "description": "Record physical conditions that permit, suppress or redistribute nutrient-driven production.", "findings": [ { "id": "retention-mixing-and-light", "name": "Retention, mixing and light", "description": "Relate the observed response to flushing, stratification, temperature and underwater light.", "questions": [ { "text": "What residence time, mixing regime, temperature and light conditions coincide with the producer response?", "kind": "measurement", "id": "retention-mixing-and-light-q01" }, { "text": "Which observed changes can be explained by physical conditions, and which still support a change in nutrient pressure?", "kind": "provenance", "id": "retention-mixing-and-light-q02" } ] } ] } ] }, { "id": "consequences-and-state", "name": "Consequences and state", "description": "Assess oxygen, habitat and ecological consequences without assuming every symptom is present.", "rationale": "Recognition of eutrophication and severity of its consequences require separate judgments.", "layers": [ { "id": "oxygen-and-light-effects", "name": "Oxygen and light effects", "description": "Measure consequential changes in oxygen availability and underwater illumination.", "findings": [ { "id": "habitat-exposure", "name": "Habitat exposure", "description": "Record the magnitude, duration and extent of oxygen depletion and light loss, with evidence of connection to producer growth and decay. [EPA environmental effects](https://www.epa.gov/nutrientpollution/effects-environment).", "questions": [ { "text": "What depth-resolved and time-resolved oxygen or light measurements establish the exposure experienced by affected habitats?", "kind": "measurement", "id": "habitat-exposure-q01" }, { "text": "How were direct organic loading, mineral turbidity and physical oxygen isolation assessed as alternative or additional causes?", "kind": "provenance", "id": "habitat-exposure-q02" } ] } ] }, { "id": "ecological-expression", "name": "Ecological expression", "description": "Connect observed ecological changes and linked hazards to an evidence-qualified assessment.", "findings": [ { "id": "consequence-qualified-state", "name": "Consequence-qualified state", "description": "Record vegetation loss, community shifts, mortality or bloom concerns separately, retaining uncertainty in attribution and severity.", "questions": [ { "text": "Which ecological changes are observed, over what area and duration, and how strong is their attribution to eutrophication?", "kind": "measurement", "id": "consequence-qualified-state-q01" }, { "text": "Which locally applicable assessment criteria support the assigned severity, and which possible consequences remain unmeasured?", "kind": "definition", "id": "consequence-qualified-state-q02" }, { "text": "Which observations warrant referral to a separate hypoxia, harmful-bloom or toxin assessment?", "kind": "action", "id": "consequence-qualified-state-q03" } ] } ] } ] }, { "id": "control-and-recovery", "name": "Control and recovery", "description": "Connect supported causes to feasible interventions and assess whether the receiving system responds.", "rationale": "An agent must distinguish immediate symptom relief, sustained nutrient reduction and demonstrated ecological recovery.", "layers": [ { "id": "intervention-fit", "name": "Intervention fit", "description": "Evaluate proposed measures against nutrient sources, internal recycling and affected habitats.", "findings": [ { "id": "causally-supported-control", "name": "Causally supported control", "description": "Record the mechanism, expected benefit, prerequisites and possible adverse effects of each candidate measure.", "questions": [ { "text": "Which controllable nutrient inputs or internal processes does each proposed measure address, and what supports its expected effect?", "kind": "action", "id": "causally-supported-control-q01" }, { "text": "What site evidence, permissions and ecological constraints must be satisfied before implementation?", "kind": "action", "id": "causally-supported-control-q02" } ] } ] }, { "id": "recovery-verification", "name": "Recovery verification", "description": "Determine whether nutrient reductions produce sustained improvements in biological response and habitat condition.", "findings": [ { "id": "response-and-reassessment", "name": "Response and reassessment", "description": "Specify monitoring that separates implementation success from waterbody recovery and tests possible response delays.", "questions": [ { "text": "Which nutrient-load, producer, oxygen and habitat indicators will demonstrate improvement over a justified assessment period?", "kind": "measurement", "id": "response-and-reassessment-q01" }, { "text": "How will evaluation account for weather, flow, seasonal variability and legacy nutrients when attributing change to the intervention?", "kind": "provenance", "id": "response-and-reassessment-q02" }, { "text": "What observed outcome or lack of response will trigger a revised diagnosis or intervention?", "kind": "action", "id": "response-and-reassessment-q03" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-kinds", "name": "Kinds and varieties", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Cultural (anthropogenic) eutrophication from sewage, manure, fertiliser, aquaculture, and atmospheric deposition", "Natural or geologic eutrophication as a slow successional increase in nutrient supply", "Freshwater lake and reservoir eutrophication, typically phosphorus-sensitive", "River and stream nutrient enrichment (potamal/running-water eutrophication)", "Coastal and marine eutrophication, including stratified shelf seas and estuaries", "Phosphorus-driven versus nitrogen-driven (or co-limited) eutrophication", "External-load-dominated versus internal-loading-dominated (sediment phosphorus release) eutrophication", "Hypereutrophy with persistent cyanobacterial or macroalgal dominance" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of eutrophication this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "scheme": "Wikidata", "value_or_pattern": "Q156698", "note": "Item for the process/phenomenon eutrophication." }, { "scheme": "MeSH", "value_or_pattern": "D005047", "note": "Medical Subject Heading Eutrophication." }, { "scheme": "GEMET", "value_or_pattern": "concept/2931", "note": "EEA General Multilingual Environmental Thesaurus term eutrophication." }, { "scheme": "ISO 6107", "value_or_pattern": "eutrophication (defined term in Water quality - Vocabulary)", "note": "Standardised water-quality vocabulary; not a numeric code." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of eutrophication this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-standards-and-regulation", "name": "Standards and regulation", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "EU Water Framework Directive 2000/60/EC (European Parliament and Council) - nutrient enrichment as a pressure on ecological status", "EU Nitrates Directive 91/676/EEC (European Council) - agricultural nitrate and eutrophication of waters", "EU Urban Waste Water Treatment Directive 91/271/EEC (European Council) - designation of eutrophication-sensitive areas and nutrient removal", "EU Marine Strategy Framework Directive 2008/56/EC Descriptor 5 (European Parliament and Council) - marine eutrophication", "OSPAR Eutrophication Strategy and Common Procedure (OSPAR Commission)", "HELCOM Baltic Sea Action Plan, eutrophication segment (Helsinki Commission)", "United States Clean Water Act nutrient criteria, listings, and TMDLs (US EPA / states)", "OECD (1982) Eutrophication of Waters monitoring and assessment framework (OECD)" ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of eutrophication this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Lake and reservoir managers set phosphorus load targets and operate aeration, biomanipulation, or chemical inactivation to keep drinking-water and recreation waters out of bloom", "Wastewater plants in designated sensitive areas add nitrogen and/or phosphorus removal to cut point-source load", "Agriculture and catchment programmes (nitrate vulnerable zones, buffer strips, manure rules) are justified as eutrophication control", "Coastal states report chlorophyll, oxygen, and nutrient status under OSPAR, HELCOM, and MSFD Descriptor 5, including Gulf of Mexico and Baltic hypoxia assessments", "Aquaculture siting and licensing use local nutrient assimilative capacity to avoid local eutrophication" ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of eutrophication this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "quantity": "Total phosphorus (TP) in lakes", "typical_range": "mesotrophic about 10-35; eutrophic about 35-100; hypereutrophic often >100 (OECD-style bands)", "unit": "µg P L⁻¹" }, { "quantity": "Chlorophyll-a (phytoplankton biomass proxy)", "typical_range": "eutrophic temperate lakes often about 8-25; bloom peaks much higher", "unit": "µg L⁻¹" }, { "quantity": "Secchi disk depth", "typical_range": "eutrophic lakes commonly about 0.8-2.5", "unit": "m" }, { "quantity": "Carlson trophic state index (TSI)", "typical_range": "eutrophic about 50-70; hypereutrophic >70", "unit": "dimensionless (0-100 scale)" }, { "quantity": "Hypolimnetic or bottom dissolved oxygen", "typical_range": "from near saturation down to 0 in stratified eutrophic basins", "unit": "mg L⁻¹" }, { "quantity": "Total nitrogen (TN) or dissolved inorganic nitrogen", "typical_range": "eutrophic lakes often about 0.5-2 mg N L⁻¹ as TN; coastal assessment levels are water-body specific", "unit": "mg N L⁻¹" }, { "quantity": "TN:TP or DIN:DIP (limitation diagnostic)", "typical_range": "molar ratio near 16 (Redfield) as a coarse N vs P limitation switch; mass TN:TP near 7-10 is often used in lakes", "unit": "mol mol⁻¹ or g g⁻¹" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of eutrophication this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Hypoxia or anoxia, fish kills, and benthic dead zones (e.g. Baltic proper, northern Gulf of Mexico)", "Harmful cyanobacterial or algal blooms and toxins (microcystins, anatoxin, domoic acid, NSP/DSP/PSP syndromes) affecting drinking water, recreation, and shellfish", "Loss of submerged aquatic vegetation and clear-water regime shifts to turbid phytoplankton dominance", "Internal phosphorus loading from reduced sediments that keeps blooms going after external loads fall", "Taste, odour, and treatment-cost failures in potable-water reservoirs; clogged intakes and filters", "Biodiversity loss, including shifts to hypoxia-tolerant and bloom-forming taxa" ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of eutrophication this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-regional-variation", "name": "Regional variation", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Temperate inland lakes are still managed mainly as phosphorus-limited (Vollenweider/Schindler tradition); many estuaries and N-Atlantic coastal waters are managed as nitrogen-sensitive or co-limited", "EU practice is WFD ecological-status and MSFD Descriptor 5; the United States uses designated uses, numeric nutrient criteria, and TMDLs", "Baltic (HELCOM HEAT) and North-East Atlantic (OSPAR Common Procedure) have basin-specific eutrophication assessment levels; the Mediterranean often emphasises oligotrophy and localised coastal hotspots", "Tropical reservoirs and monsoon-fed lakes show stronger seasonal load pulses and year-round cyanobacteria than ice-covered temperate lakes", "East Asian practice often frames the same process as red tide / akashio or lake-bloom control (e.g. Taihu) rather than using the OECD trophic-state vocabulary" ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of eutrophication this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "name": "Organic pollution / saprobity", "difference": "Saprobity is driven by degradable organic carbon and is diagnosed with BOD/COD and sewage fungus or oligochaete indices; eutrophication is diagnosed with nutrients, chlorophyll, and primary-production symptoms even when BOD is modest." }, { "name": "Harmful algal bloom (HAB) as a standalone event", "difference": "HABs can be triggered by upwelling, cysts, or hydrography without a secular rise in nutrient supply; eutrophication requires an increased organic-matter or nutrient supply rate, not merely a toxic bloom." }, { "name": "Natural lake aging (ontogeny)", "difference": "Basin infilling and paludification operate on geologic timescales; cultural eutrophication is a decades-scale response to a measured increase in external N or P load." }, { "name": "Dystrophy (humic brown-water lakes)", "difference": "Dystrophic waters are stained by dissolved organic carbon, often acidic and unproductive despite dark colour; separate high DOC and low chlorophyll from high chlorophyll and high TP." }, { "name": "Hypoxia from physical stratification or sewage BOD alone", "difference": "Oxygen sag without elevated chlorophyll, Secchi loss, or nutrient enrichment is not eutrophication; confirm a primary-production or nutrient-supply pathway." }, { "name": "Acidification", "difference": "Acidification is a pH/alkalinity and sulphate or nitrate-deposition problem; it can coexist with nutrients but is separated by pH, ANC, and aluminium, not by trophic-state indices." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of eutrophication this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "With no registry definition recorded, should this entry explicitly cover terrestrial eutrophication as well as the aquatic scope proposed here?", "Which waterbody-specific reference conditions and assessment methods should govern recognition and severity across freshwater, estuarine and marine settings?", "What minimum evidence should distinguish nutrient enrichment, a eutrophic condition and an ongoing eutrophication process when historical observations are absent?", "How should uncertain nutrient limitation, internal loading and changing hydrology be combined when selecting controls?", "What evidence and observation period are sufficient to declare recovery where legacy nutrients or persistent community changes may delay the response?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 18, "questions": 31 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "work, medium or creative form", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a eutrophication, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an AI agent to recognise nutrient-driven increases in aquatic production, assess their extent and consequences, and identify justified monitoring or mitigation actions.", "characteristics": { "substance": "information", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "read and interpreted", "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: harmful algal bloom.", "1 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 60 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a eutrophication, and on what evidence are they told apart?" ], "whatItIsMadeOf": "content that has to be carried by something else", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "read it and act on what it says", "observe it, measure it, record its state" ], "howItIsRecognised": [ "What is seen is a copy or a performance, not the work. Recognising the work means recognising the content through whatever is carrying it." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "harmful algal bloom" ] } ], "standing": "Described in 60 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 1 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one eutrophication from another, and a eutrophication from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a eutrophication sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a eutrophication from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a eutrophication passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a eutrophication between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a eutrophication, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a eutrophication is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "content-and-access", "name": "Content, encoding and access", "description": "What a eutrophication says, how it is encoded and who may read it.", "rationale": "An informational thing carries content that can be copied, versioned and withheld, none of which its physical carrier explains.", "layers": [ { "id": "content-and-encoding", "name": "Content and encoding", "description": "The content itself, its format and its language.", "findings": [ { "id": "content-and-format", "name": "Content, format and language", "description": "What a eutrophication contains and in what form it is held.", "questions": [ { "id": "content-and-format-q01", "text": "What identifies and describes the content of a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "content-and-format-q02", "text": "Who or what asserted this about the content of a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "content-and-format-q03", "text": "What may an agent decide or do once the content of a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "access-and-rights", "name": "Access, rights and retention", "description": "Who may read, copy or change it, and for how long it is kept.", "findings": [ { "id": "access-rules", "name": "Access rules and retention", "description": "The permissions attached to a eutrophication and the period it survives.", "questions": [ { "id": "access-rules-q01", "text": "What identifies and describes access to a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "access-rules-q02", "text": "Who or what asserted this about access to a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "access-rules-q03", "text": "What may an agent decide or do once access to a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "work-and-manifestation", "name": "Work, version and copy", "description": "Which level of eutrophication a statement is about.", "rationale": "The work, the edition, the file and the copy in hand are four things; rights and content attach to different ones.", "layers": [ { "id": "levels", "name": "Levels of the thing", "description": "Work, expression, manifestation and item, in plain terms.", "findings": [ { "id": "level-rules", "name": "What belongs at each level", "description": "Which facts hold for the work and which only for one copy.", "questions": [ { "id": "level-rules-q01", "text": "For eutrophication, which facts belong to the work itself, which to a version, and which to a single copy?", "kind": "boundary" }, { "id": "level-rules-q02", "text": "What identifier exists at each level, and which one is being cited?", "kind": "definition" } ] } ] }, { "id": "versions", "name": "Versions, editions and variants", "description": "How versions differ and which is canonical to whom.", "findings": [ { "id": "version-record", "name": "Versions and canonicity", "description": "Differences that matter and who calls one authoritative.", "questions": [ { "id": "version-record-q01", "text": "Which versions or editions of eutrophication exist, and how do they differ substantively?", "kind": "definition" }, { "id": "version-record-q02", "text": "Who treats which version as authoritative, and for what purpose?", "kind": "provenance" } ] } ] } ] }, { "id": "authorship-and-rights", "name": "Authorship, rights and permitted use", "description": "Who made eutrophication and what may be done with it.", "rationale": "Rights are jurisdictional, time-limited and attached to a level, and an agent that ignores that will copy what it may not.", "layers": [ { "id": "authorship", "name": "Authorship and contribution", "description": "Who contributed what, and in what capacity.", "findings": [ { "id": "contribution-record", "name": "Contributors and roles", "description": "The people and bodies behind it, with their roles.", "questions": [ { "id": "contribution-record-q01", "text": "Who authored or contributed to eutrophication, in what roles, and how is that attested?", "kind": "provenance" }, { "id": "contribution-record-q02", "text": "Where authorship is disputed or anonymous, what is recorded instead?", "kind": "boundary" } ] } ] }, { "id": "rights", "name": "Rights and permissions", "description": "Which rights subsist, where, until when, and what they permit.", "findings": [ { "id": "rights-record", "name": "Rights, term and permitted acts", "description": "The regime in force and what it allows.", "questions": [ { "id": "rights-record-q01", "text": "What rights subsist in eutrophication, in which jurisdictions, and until when?", "kind": "definition" }, { "id": "rights-record-q02", "text": "Which acts are permitted without further permission, and which must an agent refuse?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a eutrophication came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a eutrophication and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a eutrophication is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a eutrophication, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a eutrophication, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a eutrophication is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 6, "layers": 12, "findings": 14, "questions": 38 } } } }