# niche (parameter-space)

A region of parameters where one system's window is open and its neighbours' are not.

- Computed level: L18 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: window  ·  Arena: general

## Emergence
**Emerges from:** [window](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-window.range), [parameter](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-parameter.condition), [wall](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-wall.range-end), [drift](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-drift.aimless), [boundary](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-boundary.limit), [open](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-open.spatial), [region](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-region.spatial), [system](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-system.organized)

**Through:** Each system has a parameter window defined by boundary limits; when one system's window is open at a parameter value where neighbouring systems' windows are closed, a persistent state emerges in the space between closing walls.

**Novel properties:**
- unshared persistence
- isolated parameter window
- emergent occupancy

## Examples
- The L4 and L5 Lagrange points in the Earth-Moon system stably trap asteroids while nearby orbits drift away. *(astronomy)*
- In the human gut, Bacteroides thetaiotaomicron thrives on complex polysaccharides absent in blood, where it cannot survive. *(microbiology)*
- The Atacama Large Millimeter Array operates at millimeter wavelengths blocked elsewhere by atmospheric water absorption. *(astronomy)*

---
*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-niche.parameter-space*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-niche.parameter-space.json*  
*Every definition provably resolves to space, time, energy and pattern.*