Biospheric mesh
A good analogy is the myzelium of funi underground in our soils.
The mesh wuold be of different sized.
Cleanup of waste
One main main purpose would be to clean up spills both of
– legacy sins of today's primitive industrial age limited to mostly Thermodynamic means for large scale chemistry
– future spills of partly highly undegradable gemstone based (meta)materials that will only be minimizable
… (if systems are well designed for that from early on and onward) but not be entirely avoidable
(wiki-TODO: Cover how different spills could be managed with such biospheric meshes)
While the mesh penetrats though the biosphere, it itself is part of mechanosphere.
So beside cleanup of spill it itself could be considered spill
if control of parts of the mesh is lost and it becomes is lost.
So it should be able to clean up after itself.
I.e. it should be cleanly undeploayble and able to remove broken parts too.
Keeping the network contiguously connected is way better for spill prevention
than using loose microbots or even nanobots roaming around freely.
So one would very likely want a quite different architecture than the one of utility for or claytronics
where parts can detach on a whim.
For degradability there is a balance to strike.
Too degradable and it might become not stable enough to work and or too difficult to design in terms of nanomachinery.
Many animals especially ones living in the soil will likely try gnawing on the mesh.
So it must either be too hard to bite or clearly non-problematic for digestion of these creatures.
Heat from wildfires are also a concern.
Different thicknesses of the mesh may use different trade-offs on degradability of materials used.
Controlled introduction of fertilizers and water
Better to keep it to a minimum and let nature do it's thing as she always did.
But one can save patches of forests in case of exceptional droughts
and supply counter ions if things get to acidic (too few alkali metals) or basic (too few oxoacids)
wile salt concentrations are low.
Removing too much salts would fall under the cleanup section above.
Interaction with the global microcomponent redistribution system (GMRS)
The GMRS may also cross through the soil in case it runs shallow.
Though usually it would be located deeper in less alive layers of the ground.
that would already be more on the lithiosphere side already.
Like river deposits of clay an gravel gravels or older deposits of sandstone and ebne hard granite bedrock like on the Canadian shield.
The GMRS could and would supply the biospheric mesh for – deployment and undeployment of itself – cleanup of pollutants senting them to more or less local processing facilities … ("facilities" could be very decentralized maybe as small as sugar beets but that pushes it, all silent and underground) – transport of fertilizer
Management of fertilizers
Also for long range transport of fertilizing nutrients that may need to come transported in from farther away.
Possible from the enormous phosphate deposits in Norway Rogaland near the fjord-riddled coastline.
Or better: Recuperated from agricultural runoff into the sea where it otherwise would lead to
algae blooms causing anoxic conditions worst case causing horrific ginormous and dead zones (as so has happened in the past).
That would fall into the task hydrospheric meshes that will likely have quite different designs.
Similar story for some lakes: Like.g. Lough Neagh in Ireland that became a nasty stinky green sludge horror due to agricultural runoff.
Hydrospheric meshes could make it into a nice place again and
the fertilizer recuperated be used via biospheric meshes where it is needed. Plus a lot of captured carbon.
Even easier given the especially high concentrations of troublemaker fertilizer.
Most of the fertilizer though would not go into biospheric meshes in semi wild nature
but would go into artificual agriculture that could make use of the same biospheric mesh technology.
Though it is questionable it considering this as a part of the biosphere is sensible.