bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Dec. 22, 2022
Abstract
Organic
carbon
in
seawater
plays
a
significant
role
the
global
cycle.
The
concentration
and
composition
of
dissolved
organic
carbon,
operationally
defined
this
project
as
that
passes
through
0.2
µm
filter,
reflect
activity
biological
community
chemical
reactions
occur
seawater.
From
2016
to
2019,
we
repeatedly
sampled
oligotrophic
northwest
Sargasso
Sea
vicinity
Bermuda
Atlantic
Time-series
Study
site
(BATS)
quantitatively
follow
known
compounds
within
pool
matter
upper
1000
meters
water
column.
Dissolved
metabolite
concentrations
revealed
patterns
with
depth
time
most
metabolites
showing
surface
enrichment
lower
increasing
depth.
Select
displayed
seasonal
throughout
year,
seasonality
was
repeated
each
years
sampled.
Concentrations
vitamins,
including
pantothenic
acid
(vitamin
B
5
)
riboflavin
2
),
increased
annually
during
winter
periods
when
mixed
layer
depths
were
deepest.
During
diel
sampling,
light-sensitive
decreased
significantly
daylight
hours.
Metabolite
over
at
BATS
showed
less
variability
compared
previous
sample
set
collected
broad
latitudinal
range
western
Ocean.
examined
study
are
all
components
central
metabolism.
By
examining
these
finer
resolution
relatively
long
series,
have
insights
into
microbial
biogeochemical
activity,
data
which
fundamental
understanding
response
marine
systems
future
changes
climate.
Organic Geochemistry,
Journal Year:
2024,
Volume and Issue:
196, P. 104839 - 104839
Published: July 20, 2024
Seasonality
in
light,
temperature,
and
nutrient
availability
are
well-known
to
regulate
phytoplankton
blooms
the
bacterioplankton
community.
During
spring
bloom,
release
biomolecules
as
part
of
dissolved
organic
matter
(DOM)
pool
exploited
by
bacterioplankton.
Here,
we
investigated
seasonal
variability
biomass,
enantiomers
hydrolyzable
amino
acids
(DHAA),
abundances
community
composition
at
Microbial
Observatory
Laboratory
Arago
(MOLA)
NW
Mediterranean
Sea
from
2019
2021.
Phytoplankton
biomass
estimated
pigment
biomarkers
suggests
a
bloom
succession
cryptophytes,
haptophytes,
prasinophytes
March
diatoms
April.
The
coincided
with
50%
increase
L-enantiomers
DHAA
an
bacterial
abundance.
After
elevated
concentrations
D-enantiomers
gamma-aminobutyric
acid
suggest
processing
labile
contributed
accumulation
carbon
(DOC).
Linking
molecules
free-living
showed
niches
substrate
regimes.
parallel
analysis
DOM
provides
important
baseline
for
bacteria-substrate
relationships
over
cycle
northwestern
Sea.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Dec. 22, 2022
Abstract
Organic
carbon
in
seawater
plays
a
significant
role
the
global
cycle.
The
concentration
and
composition
of
dissolved
organic
carbon,
operationally
defined
this
project
as
that
passes
through
0.2
µm
filter,
reflect
activity
biological
community
chemical
reactions
occur
seawater.
From
2016
to
2019,
we
repeatedly
sampled
oligotrophic
northwest
Sargasso
Sea
vicinity
Bermuda
Atlantic
Time-series
Study
site
(BATS)
quantitatively
follow
known
compounds
within
pool
matter
upper
1000
meters
water
column.
Dissolved
metabolite
concentrations
revealed
patterns
with
depth
time
most
metabolites
showing
surface
enrichment
lower
increasing
depth.
Select
displayed
seasonal
throughout
year,
seasonality
was
repeated
each
years
sampled.
Concentrations
vitamins,
including
pantothenic
acid
(vitamin
B
5
)
riboflavin
2
),
increased
annually
during
winter
periods
when
mixed
layer
depths
were
deepest.
During
diel
sampling,
light-sensitive
decreased
significantly
daylight
hours.
Metabolite
over
at
BATS
showed
less
variability
compared
previous
sample
set
collected
broad
latitudinal
range
western
Ocean.
examined
study
are
all
components
central
metabolism.
By
examining
these
finer
resolution
relatively
long
series,
have
insights
into
microbial
biogeochemical
activity,
data
which
fundamental
understanding
response
marine
systems
future
changes
climate.
