Locked in a subsystem

[Tamalak]

My group is stuck in a smallish lake/river system (feels like about 1/5 of a supergrid, 2 lakes). The shortest path over land from our water system to the larger one is about 5 minimap squares long. I was thinking about making a paved "land bridge" palisaded on each side. My questions..

1. Would animals spawn in the land bridge if it were unclaimed?
2. How fast would the pavement deteriorate if it were unclaimed?

[TeckXKnight]

Pavement never decays and animals never spawn on paved tiles.