{"id": "card_ecology_energy_flow", "kind": "reference", "title": "Energy flow — the 10 percent rule", "body": "About a tenth of the energy at one trophic level reaches the next (sealed), so food chains are short and top predators rare - the second law paid at every step.", "source": {"label": "Narrow Highway — ecology", "url": "", "authority_tier": "engine_derived"}, "shelf": "codex", "box": "ecology", "bands": ["ecology", "pillar", "energy_flow", "one map"], "subject": "Energy flow — the 10 percent rule", "connections": [{"to_card_id": "card_floor_ecology", "relationship": "part_of", "evidence": "a pillar (Energy flow)"}, {"to_card_id": "card_floor_biology", "relationship": "connects_at", "evidence": "trophic levels - who eats whom in the living world"}, {"to_card_id": "card_floor_thermodynamics", "relationship": "connects_at", "evidence": "energy is lost as heat up the food chain - the second law"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "call": "codex.ecology", "facets": {"subject": ["energy_flow", "one map", "pillar"]}, "presentation": {"glyph": "•", "kind_label": "ecology", "by": "Narrow Highway — ecology", "authority": "engine_derived", "posted": "", "standing": ""}, "neighbors": [{"id": "card_floor_ecology", "title": "Ecology — energy and number in the living world", "relationship": "part of", "why": "a pillar (Energy flow)", "href": "/card/card_floor_ecology", "resolved": true}, {"id": "card_floor_biology", "title": "Biology — life is self-replicating chemistry", "relationship": "connects at", "why": "trophic levels - who eats whom in the living world", "href": "/card/card_floor_biology", "resolved": true}, {"id": "card_floor_thermodynamics", "title": "Thermodynamics — the arrow and the one end", "relationship": "connects at", "why": "energy is lost as heat up the food chain - the second law", "href": "/card/card_floor_thermodynamics", "resolved": true}], "house": {"door": "FIND", "kind": "card", "trail": "connections", "seal": "/card/card_ecology_energy_flow", "next_step": {"do": "follow a connection: what this card rests on, and what rests on it", "door": "FIND", "tool": "card_connections", "params": {"id": "card_ecology_energy_flow"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}