The
microbiomes
in
macroalgal
holobionts
play
vital
roles
regulating
growth
and
ocean
carbon
cycling.
However,
the
virospheres
remain
largely
underexplored,
representing
a
critical
knowledge
gap.
Here
we
unveil
that
holobiont
of
kelp
(Saccharina
japonica)
harbors
highly
specific
unique
epiphytic/endophytic
viral
species,
with
novelty
(99.7%
unknown)
surpassing
even
extreme
marine
habitats
(e.g.
deep-sea
hadal
zones),
indicating
virospheres,
despite
being
closest
to
us,
are
among
least
understood.
These
viruses
potentially
maintain
microbiome
equilibrium
for
health
via
lytic-lysogenic
infections
expression
folate
biosynthesis
genes.
In-situ
mesocosm
cultivation
metagenomic
mining
revealed
profoundly
reshaped
surrounding
seawater
sediment
virus-prokaryote
pairings
through
changing
environmental
conditions
virus-host
migrations.
Some
epiphytic
could
infect
autochthonous
bacteria
after
deposition.
Moreover,
presence
ample
auxiliary
metabolic
genes
polysaccharide
laminarin)
degradation
underscores
underappreciated
influence
on
This
study
provides
key
insights
into
understanding
previously
overlooked
ecological
significance
within
macroalgae-prokaryotes-virus
tripartite
relationship.
Journal of Phycology,
Год журнала:
2023,
Номер
60(1), С. 4 - 14
Опубликована: Ноя. 9, 2023
Abstract
To
limit
global
warming
below
2°C
by
2100,
we
must
drastically
reduce
greenhouse
gas
emissions
and
additionally
remove
~100–900
Gt
CO
2
from
the
atmosphere
(carbon
dioxide
removal,
CDR)
to
compensate
for
unavoidable
emissions.
Seaweeds
(marine
macroalgae)
naturally
grow
in
coastal
regions
worldwide
where
they
are
crucial
primary
production
carbon
cycling.
They
being
considered
as
a
biological
method
CDR
use
trading
schemes
offsets.
seaweeds
requires
verification
that
seaweed
photosynthesis
fixes
into
organic
results
CDR,
along
with
safe
secure
storage
of
removed
more
than
100
years
(sequestration).
There
is
much
ongoing
research
magnitude
pools
(e.g.,
living
biomass
particulate
dissolved
sediments
deep
ocean),
but
these
do
not
equate
unless
amount
result
can
be
quantified
verified.
The
draw‐down
atmospheric
seawater
via
air‐sea
equilibrium,
which
operates
on
time
scales
weeks
depending
upon
ecosystem
considered.
Here,
explain
why
quantifying
equilibrium
linking
this
process
critical
step
needed
verify
discrete
beds
nearshore
open
ocean
aquaculture
systems
prior
their
trading.
The Science of The Total Environment,
Год журнала:
2023,
Номер
890, С. 164430 - 164430
Опубликована: Май 27, 2023
The
role
of
macroalgae
(seaweed)
as
a
global
contributor
to
carbon
drawdown
within
marine
sediments
-
termed
'blue
carbon'
remains
uncertain
and
controversial.
While
studies
are
needed
validate
the
potential
for
macroalgal‑carbon
sequestration
in
coastal
sediments,
fundamental
questions
regarding
fate
dislodged
macroalgal
biomass
need
be
addressed.
Evidence
suggests
may
advected
deposited
other
vegetated
ecosystems
down
deep
ocean;
however,
contributions
near-shore
waters
remain
uncertain.
In
this
study
combination
eDNA
metabarcoding
surficial
sediment
sampling
informed
by
seabed
mapping
from
different
physical
environments
was
used
test
presence
south-eastern
Australia,
factors
influencing
patterns
transport
deposition.
DNA
products
total
68
taxa,
representing
all
major
groups
(Phaeophyceae,
Rhodophyta,
Chlorophyta)
were
successfully
detected
at
112
locations.
These
findings
confirm
exported
into
suggest
donors
could
both
speciose
diverse.
Modelling
suggested
that
deposition,
organic
(TOC),
influenced
complex
interactions
between
several
environmental
including
water
depth,
grain
size,
wave
orbital
velocity,
current
speed,
direction,
extent
infralittoral
zone
around
depositional
areas.
Extrapolation
optimised
model
predict
spatial
deposition
TOC
across
coastline
identify
potentially
important
sinks.
This
builds
on
recent
providing
empirical
evidence
deposits
framework
predicting
distribution
sinks
informing
future
surveys
aimed
determining
long-term
sediments.
Ocean-Land-Atmosphere Research,
Год журнала:
2024,
Номер
3
Опубликована: Янв. 1, 2024
The
chemical
oxygen
demand
(COD)
is
an
essential
indicator
of
organic
pollution
that
represents
the
amount
bulk
carbon
in
water.
COD
strongly
correlated
with
nutrient
cycles
and
other
pollutants
environment,
but
it
has
a
limited
ability
to
quantify
(OC),
which
large
proportion
made
up
refractory
dissolved
(RDOC)
potential
sink.
Moreover,
biodegradability
OC
terms
its
fate
destination
should
be
explored,
as
well
how
this
reflected
by
COD.
Methods
based
on
particle
size,
spectroscopy,
isotopic
tracing
are
expected
help
deciphering
bioavailability
COD-responsive
explore
processes
biogeochemical
cycles.
As
pressure
environment
from
anthropogenic
inputs
increases,
understanding
associated
will
developing
more
precise
scientific
indicators
for
environmental
monitoring
identifying
new
tools
increase
knowledge
cycle.
In
review,
we
discuss
application,
scope,
means,
advances
measurement.
Based
data
literature,
estimate
global
RDOC
stock
assess
impact
cycle
offshore
bays.
This
review
presents
insights
into
behavior
aquatic
environments
pathway
ocean
negative
emissions
expanding
role
sink
offset
effect
emissions.
Reviews in Aquaculture,
Год журнала:
2025,
Номер
17(2)
Опубликована: Март 1, 2025
ABSTRACT
Blue
carbon
habitats,
which
exhibit
high
rates
of
natural
sequestration,
typically
refer
to
salt
marshes,
seagrass
meadows,
and
mangrove
forests.
Recent
studies,
however,
have
argued
for
the
inclusion
seaweed‐dominated
like
kelp
forests,
into
blue
frameworks.
Farmed
seaweed
may
also
function
as
a
habitat,
with
large‐scale
aquaculture
suggested
climate
change
mitigation
strategy,
but
evidence
base
remains
limited.
Here,
existing
knowledge
on
mechanisms
influencing
uptake,
release,
transport,
storage
from
farms
was
synthesised,
literature
review
conducted
quantify
associated
sequestration.
We
identified
strong
geographical
methodological
biases
in
literature,
majority
studies
Asia
focusing
primary
production
proxy
sequestration
potential.
Estimates
release
were
highly
variable
across
locations,
species,
approaches,
scarcity
research
dissolved
organic
carbon,
sedimentary
net
ecosystem
productivity
identified.
Although
European
farming
industry
is
its
infancy,
it
predicted
expand
meet
increasing
demand
biomass.
This
incentivised
by
perceived
service
benefits
such
enhanced
However,
multiple
factors
including
environmental
concerns,
lack
quantitative
evidence,
operational
challenges,
regulatory
complexities
hinder
expansion.
Based
both
synthesised
empirical
an
examination
key
barriers
gaps,
we
identify
future
challenges
priorities
needed
assess
role
mitigation.
Environmental Science & Technology,
Год журнала:
2022,
Номер
57(1), С. 770 - 779
Опубликована: Дек. 13, 2022
Despite
green
tides
(or
macroalgal
blooms)
having
multiple
negative
effects,
it
is
thought
that
they
have
a
positive
effect
on
carbon
sequestration,
although
this
aspect
rarely
studied.
Here,
during
the
world's
largest
tide
(caused
by
Ulva
prolifera)
in
Yellow
Sea,
concentration
of
dissolved
organic
(DOC)
increased
20-37%
intensive
areas,
and
thousands
new
molecular
formulas
rich
CHNO
CHOS
were
introduced.
The
DOC
species
derived
from
U.
prolifera
constituted
∼18%
total
seawater
bloom
area,
indicating
profound
shaping
coastal
DOC.
In
addition,
46%
macroalgae-derived
was
labile
(LDOC),
which
had
only
short
residence
time
due
to
rapid
microbial
utilization.
remaining
54%
recalcitrant
(RDOC)
humic-like
substances,
polycyclic
aromatics,
highly
aromatic
compounds
resisted
degradation
therefore
potential
play
role
long-term
sequestration.
Notably,
source
analysis
showed
addition
pump,
macroalgae
are
also
an
important
RDOC.
number
RDOC
contributed
even
exceed
(77
vs
23%)
microorganisms.
