Table 1 Estimates of endospore abundance and biomass.

Summary of vegetative cell and endospore abundance for the top kilometer of subseafloor sediment based on the three modeling approaches performed. Biomass data are calculated from DPA abundance in the case of endospores and from cell abundance in the case of vegetative cells.

Modeling approachData usedEndospore populationEndospore biomass
(Pg C)
Vegetative cell
population
Vegetative cell
biomass (Pg C)
Average sediment depth
calculation
Global correlation of
endospore
concentration vs.
depth (this study)
8.2 × 1028151.3 × 10291.8
Single-site
parameterization of
endospore
concentration
Endospore
concentration vs.
depth at single sites
(this study)
2.5 × 10284.6
Vegetative cell to
endospore conversion
Global correlation of
endospore/cell ratio
vs. depth (this study).
Modeled global
abundance of
vegetative cells vs.
depth (2)
1.9 × 1029358.5 × 10281.2