Keep Earth's ecology enclosed even on a new planet?

The options

The order shown is not a ranking of preference.

1. Option 1

   Keep the closed ecological boundary

   Reduces undetermined exchange with the outside but inherits, for a long time, the limits of expansion and of internal circulation.

2. Option 2

   Limited exchange within a defined range

   Opens a channel for learning the new environment, but it is hard to be certain about effects across the boundary and about the possibility of reversal.

3. Option 3

   Shift the living system to reflect local relations

   Need not insist only on the way things were brought over, but introduces unknowns in entrusting life to unfamiliar relations.

The situation as it stands

The assumed settled community maintains an ecology brought from Earth inside a closed living zone. Decision deadline: within 3 years, before the new living zone is opened.

Fictional synthetic scenario in the year 2370 · A migrant community sends the ecology it brought with it outside the bounds of a new planet. The events, figures, technologies, and nature of the civilization are assumptions for the sake of the question, not predictions of what is to come or observations of fact.

1. Premise 1The assumed settled community maintains an ecology brought from Earth inside a closed living zone.
2. Premise 2Widening the boundary increases living space and access to resources but can change local, little-known cycles.
3. Premise 3Continuing closure reduces outside influence but increases the burden of internal diversity and of the means of maintenance.

Where it holdsAssumed mobile ecology · boundaries · the cost of settling

What is still unknown

1. Unknown 1The actual points of contact between the internal ecology and local circulation
2. Unknown 2Whether small exchanges bring reversible change
3. Unknown 3The long-term resources and alternatives for maintaining a closed state

Signals to decide again

• Decide what observations, responsible parties, and confirmation channels can verify “the actual points of contact between the internal ecology and local circulation,” and re-judge when a new finding changes the trade-offs among the options.
• Decide what observations, responsible parties, and confirmation channels can verify “whether small exchanges bring reversible change,” and re-judge when a new finding changes the trade-offs among the options.
• Decide what observations, responsible parties, and confirmation channels can verify “the long-term resources and alternatives for maintaining a closed state,” and re-judge when a new finding changes the trade-offs among the options.