The top "living" layer of peat moss grows seamlessly on the "dead" peat. The top layer is called Acrotelm; is 10cm deep. It accumulates at around 1cm/yr and is subsequently compressed as it accumulates in the lower catotelm/peat layer at a rate of 1mm/yr. 15m deep peat is the S.fuscum limit. Other types of peat likely emit methane; other plant species should be researched here only as a succession target or as S.fuscum symbiotes and temporary pioneer species.
Acrotelm has been reintroduced upon dry harvested peatland with moderate success. There were noticable gaps caused by hysterisis. If this is the only issue, rolling reclaimed peatland might help at a cost.
No one has yet tried to introduce acrotelm from an intact S.fuscum peatland, and introduced it where no S.fuscum peatland exists. 1/3 of the existing Acrotelm can be safely harvested with regrowth in a few years in peat lands where rainfall is 1200mm/yr. Possible moisture holding substrates for reintroducing Acrotelm (chunks of 4000cm^3 will survive/grow better than 2000cm^3) upon include stand-alone or a combination of:
- Peat deposited by faster growing and decaying plant species.
- Loess or silt. Silt covering Acrotelm is not desired.
- Clay or clayey soil.
- Thin slivers of S.fuscum peat at potentially different stages of "decay", separated from a metres deep peat "deposit".