Table 2 Compilation and global estimates of microbial biomass production rates through chemoorganotrophya within hydrothermal non-buoyant plumes (NBP).

From: Hydrothermal plumes as hotspots for deep-ocean heterotrophic microbial biomass production

Model-based microbial biomass production rates in non-buoyant plumes based on chemoorganotrophya (µgC L−1 d−1)

Site

Rates

 

Seawater

0.0067

 

TAG

0.0116

 

Rainbow

0.0124

 

BrokenSpur

0.0088

 

Logatchev

0.0092

 

Ashadze

0.0101

 

Tour Eiffel

0.0109

 

EPR Grand Bonum

0.0088

 

Dante

0.0097

 

Edmonds

0.0091

 

Kairei

0.0092

 

Average ± standard error

0.01235 ± 0.003 µgC L−1 d−1

 

Areal estimates of microbial biomass production based on chemoorganotrophya (gC m−2 y−1)—plume height considered: 200 m

Average ± standard error

0.902 ± 0.219 gC m−2 y−1

 

Global estimates of microbial biomass production based on chemoorganotrophya (GtC y−1)

Number of active vents at Mid Ocean Ridges15

Average

Min

Max

1305

713

1853

Global production rates—Plume area considered: 1000 km²

Average

Min

Max

1.2 ± 0.3 × 10−3 GtC y−1

0.6 ± 0.2 × 10−3 GtC y−1

1.7 ± 0.4 × 10−3 GtC y−1

Global production rates—Plume area considered: 10% of 400 × 103 km² + 90% of 1000 km²

Average

Min

Max

0.048 ± 0.012 GtC y−1

0.026 ± 0.006 GtC y−1

0.068 ± 0.017 GtC y−1

  1. aCommonly defined as prokaryotic heterotrophic production (PHP, see main text).