<rahmann et al.
Metabolic Rates of Benthic Microorganisms and
Their Role in Benthic N-Cycling
Denitrification and oxygen respiration rates of benthic
microorganisms (i.e., foraminifera) were measured during one
cruise to the Peruvian OMZ (M137) and one research trip
to the Swedish Gullmar Fjord (Woehle et al., 2018; Glock
2t al., 2019). The rates were calculated from linear steady-state
gradients of nitrous oxide or oxygen in glass microcapsules (after
Hogslund et al., 2008; Pifia-Ochoa et al., 2010; Glock et al., 2019).
Abundances of living benthic foraminifera were determined on
three cruises to the Peruvian OMZ (Mallon et al., 2012; Glock
zt al., 2013; Erdem et al., 2020). Total abundances and individual
metabolic rates were used to upscale to the total contribution of
foraminifers to benthic N-fluxes and nitrate storage (Glock et al.,
2013, 2019). On M137, intracellular phosphate storage was also
investigated (Glock et al., 2020).
SUMMARY
The SFB 754 project was a milestone for the investigation
of biogeochemical and physical interactions in the tropical
oaceans. The extended period of funding granted by the German
Research Foundation allowed for the development of a highly
interdisciplinary research program that has lead to a wealth of
new insights documented in a large number of publications,
theses, and presentations. The open access publication of the
large number of different data sets collected during the project
can be expected to form a lasting legacy well beyond the project
itself. We anticipate and look forward to many more publications
and projects that will build upon this unique basis.
DATA AVAILABILITY STATEMENT
The datasets presented in this study can be found in online
repositories. The names of the repository/repositories and
accession number(s) can be found in the article/Supplementary
Material.
SFB754 Data Legacy
the common sections. HM handled the data submissions to
PANGAEBA. All authors contributed to the article and approved
the submitted version.
FUNDING
We gratefully acknowledge the financial support for the
“Sonderforschungsbereich 754: Climate-Biogeochemistry
Interactions in the Tropical Ocean” by the DFG. The main
support for the cruises M91 and MSM18/3 came through the
BMBF-funded joint projects SOPRAN I-III (FKZ 03F0462,
03F0611, and 03F0662). Cruise SO243 was mainly supported
by the BMBF-funded project SO243 - ASTRA-OMZ (FKZ
03G0243A). Support for cruises ATA_IFMGEOMAR_4, M80/1,
MSM18/2, MSM22, M130, and M145 came also through the
BMBF-funded joint projects NORDATLANTIK, RACE, and
RACE II (FKZ 03F0443B, 03F0651B, and 03F0729C). Cruises
MSM22 and M105 received further support from the EU-funded
project CARBOCHANGE (grant 264879).
ACKNOWLEDGMENTS
We would like to extend our sincere thanks to the authorities
from the countries bordering the Eastern Tropical Pacific and
che Tropical Atlantic for granting the permissions to conduct
studies in their territorial waters. The captains and crews of
the research vessels made our measurements possible with
'heir much appreciated invariably skilled support. Principal
investigators, scientists, students, technicians, administrators,
and support personnel all worked together to form the
SFB 754 and a big thank you goes to all of them. The
Deutsche Forschungsgemeinschaft of course deserves our deep
gratitude for making such long-term and large-scale science
projects possible.
SUPPLEMENTARY MATERIAL
AUTHOR CONTRIBUTIONS
Sach of authors wrote subsections of the manuscript and
provided data for the tables. GK combined the input and wrote
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