The Enclosure is the physical boundary of miniBIOTA: ten 29-gallon tanks connected by sealed ports and couplers, arranged at intentional elevations to drive water flow and atmospheric coupling across all six biomes.
The Enclosure is the physical boundary of miniBIOTA: ten 29-gallon tanks connected by sealed ports and couplers, arranged at intentional elevations to drive water flow and atmospheric coupling across all six biomes.
A closed biosphere is an ecological system in which no material crosses the boundary during normal operation: no food input, no waste removal, no water exchange, no gas venting. Energy enters as light and leaves as heat; all other matter cycles internally through photosynthesis, respiration, predation, decomposition, and elemental recycling. The spectrum runs from open (conventional aquariums with nutrient addition, water changes, and waste removal) to bioregenerative (all element cycles self-contained, closure complete, organisms supported exclusively by photosynthesis and internal recycling). miniBIOTA is aimed at the bioregenerative end of that spectrum.
Material closure matters ecologically because it determines what controls nutrient cycling, atmospheric composition, and trophic energy flow. In an open system, nutrients can be added exogenously and the food web maintained at any desired level through external management. In a closed system, all energy must come from photosynthesis, all nutrients must cycle internally, and the system lives or dies by the balance of producers, consumers, and decomposers. Whether miniBIOTA achieves ecological stability or collapses toward a dominant producer or reduced diversity state depends on whether its organisms collectively close the material cycles, not on whether a manager adds the missing nutrient.
Current closure state: all six biome tanks and four atmosphere tanks form the enclosed boundary. No feeding, no nutrient supplementation, no water addition, and no mechanical filtration currently occur. Organisms may still be added or removed for experimental refinement. Minor passive air leakage exists at current sealing.
Closure vs. experimental refinement: The current sealing boundary explicitly permits organism addition and removal for experimental refinement, while the target state eliminates organism introduction entirely. The current research period is still a phase of community building: species are being added, tested, and sometimes removed as the ecological system is assembled. The path from "closed working concept with active organism management" to "fully closed with no intervention" is the most consequential unresolved transition in the Enclosure's trajectory and defines when the system's ecology can be attributed to internal cycling rather than managed assembly.
Atmosphere tank coverage gap: Freshwater Lake and Seagrass Meadow do not have their own atmosphere tanks. They route humid air into adjacent tanks. Whether this indirect coupling is adequate for full water-cycle participation, or whether those biomes are underrepresented in condensation and rain delivery, is not confirmed.
Habitats directly connected to this hardware system.
