Planktonic drivers of carbon transformation during different stages of the spring bloom at the Patagonian Shelf-break front, Southwestern Atlantic Ocean
Biogeochemistry,
Год журнала:
2025,
Номер
168(1)
Опубликована: Янв. 2, 2025
The
processes
involved
in
the
carbon
cycle
are
essential
for
marine
trophic
networks
and
global
climate
regulation.
Interactions
within
microbial
loop
play
key
roles
transformation
transport
across
food
web.
Argentine
Patagonian
Shelf
Southwestern
Atlantic
Ocean
is
a
hotspot
sequestration.
However,
our
understanding
of
impacts
on
cycling
this
area
remains
limited.
This
study
examines
community
structure
its
role
during
progression
spring
bloom
along
shelf-break
adjacent
ocean.
was
studied
latitudinal
track
where
we
observed
gradient
Dissolved
Organic
Matter
(DOM)
complexity.
In
northern
area,
termination
characterised
by
low
Chlorophyll-a
concentrations,
with
smaller
organisms
(Synechococcus)
dominating
autotrophic
plankton
biomass,
high
viral
concentrations.
DOM
showed
humification
aromaticity,
indicating
an
intensified
activity
heterotrophic
bacteria
that
followed
production
phytoplankton-derived
DOM.
southern
mainly
attributed
to
large
protist
plankton,
accompanied
abundant
bioavailable
from
recent
phytoplankton
blooms.
These
results
termination,
bacterial
refractory
compounds
significantly
immobilises
carbon,
suggesting
potential
pathway
Additionally,
data
suggest
retention
shelf
side
front
efficient
transfer
community,
while
influenced
Malvinas
Current,
presents
export
advection
higher
degree
unutilised
origin.
findings
highlight
rapid
shifts
dynamics
driven
successions
different
phases.
Язык: Английский
Source characterization of dissolved organic matter in the eastern Beagle Channel from a spring situation
Andrea Malits,
Chiara Monforte,
Clara M. Iachetti
и другие.
Journal of Marine Systems,
Год журнала:
2023,
Номер
240, С. 103863 - 103863
Опубликована: Фев. 3, 2023
Язык: Английский
Terrigenous dissolved organic matter input and nutrient-light-limited conditions on the winter microbial food web of the Beagle Channel
Journal of Marine Systems,
Год журнала:
2023,
Номер
239, С. 103860 - 103860
Опубликована: Янв. 27, 2023
Язык: Английский
Ecological role of pelagic appendicularians in sub-Antarctic coastal and oceanic waters of the Southwest Atlantic Ocean
Polar Biology,
Год журнала:
2025,
Номер
48(1)
Опубликована: Янв. 15, 2025
Язык: Английский
Ichthyoplankton temporal and spatial patterns in sub-Antarctic coastal and oceanic waters of the Southwestern Atlantic
Estuarine Coastal and Shelf Science,
Год журнала:
2025,
Номер
unknown, С. 109260 - 109260
Опубликована: Март 1, 2025
Язык: Английский
The Sub-Antarctic Beagle Channel marine ecosystem: A regional and comprehensive sentinel of global change
Journal of Marine Systems,
Год журнала:
2023,
Номер
241, С. 103914 - 103914
Опубликована: Июнь 30, 2023
Язык: Английский
Spring abundance, biomass and sizes of appendicularians between open sea MPA Namuncurá/ Burdwood Bank and the adjacent coastal area, Southwest Atlantic Ocean: Are they a key link in the trophic web?
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 21, 2024
Abstract
Appendicularians
are
recognized
as
one
of
the
most
abundant
mesozooplankton
groups
in
numerous
pelagic
environments
and
they
play
a
crucial
role
marine
ecosystems
bridge
gap
between
primary
producers
higher
trophic
levels
food
webs.
Zooplankton
samples
were
collected
during
three
spring
oceanographic
surveys
conducted
2014,
2015,
2016,
coastal
zone
(Staten
Island)
oceanic
(Namuncurá-Banco
Burdwood
Marine
Protected
Area).
Our
study
focuses
on
comparative
analysis
species
composition,
density,
biomass,
maturity
stages
appendicularia
these
regions,
which
marked
by
distinct
physical
biological
attributes.
Two
appendicularians
found
area,
Oikopleura
fusiformis
Fritillaria
borealis,
former
being
dominant.
Their
distribution
was
different
because
F.
borealis
mainly
concentrated
while
O.
consistently
recorded
both
zones.
Chlorophyll-a
concentrations
to
be
than
zone.
These
accompanied
densities
that
area.
The
surface
current
velocity
seems
reflect
total
phytoplankton
biomass
On
other
hand,
temperature
for
protected
area
lower
could
related
larger
sizes
Baseline
data
areas
surrounding
is
essential
contribute
stakeholders
advise
future
changes
translate
into
regional
global
processes.
Язык: Английский
A fast-track, high-throughput screening platform for biological nitrification inhibitors discovery based on soil relevant ammonia oxidizing strains
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 3, 2024
Abstract
Nitrogen
cycling
is
critical
for
ecosystem
functioning,
with
nitrification
playing
a
central
role.
Excessive
nitrification,
triggered
by
heavy
nitrogen
fertilisation,
contributes
to
reduced
use
efficiency,
nitrate
leaching,
and
nitrous
oxide
emissions.
While
synthetic
inhibitors
(SNIs)
help
reduce
these
impacts,
their
erratic
performance
environmental
risks
have
shifted
focus
biological
(BNIs)
as
sustainable
alternatives.
In
vitro
bioassays
ammonia-oxidising
microorganisms
(AOM)
are
valuable
BNI
discovery
research,
but
often
low
throughput
rely
on
limited
number
of
mostly
non-soil-relevant
or
genetically
modified
ammonia-oxidizing
bacteria
(AOB)
strains,
lacking
validation
established
BNIs.
We
present
refined
fast-track,
high-throughput
assay
screening,
utilizing
soil-relevant,
ecophysiologically
phylogenetically
diverse
AOB
(
Nitrosospira
multiformis,
Nitrosomonas
ureae,
communis
)
archaea
(AOA)
strains
Nitrososphaera
viennensis,
“
Ca
.
Nitrosocosmicus
franklandianus”),
achieving
consistent
cellular
activity
density.
The
was
validated
SNIs
BNIs,
showing
differences
in
inhibition
efficacy
strain
sensitivity,
literature.
As
proof
concept,
root
exudates
from
wheat
genotypes
were
screened,
demonstrating
distinct
profiles.
proposed
system
advances
previously
available
screening
systems
and,
when
integrated
realistic
soil
tests,
will
facilitate
the
novel
BNIs
BNI-producing
plant
genotypes.
Язык: Английский