Functional Ecology,
Год журнала:
2023,
Номер
37(10), С. 2634 - 2651
Опубликована: Авг. 24, 2023
Abstract
Coastal
blue
carbon
(C)
ecosystems
are
recognized
as
efficient
natural
C
sinks
and
play
key
roles
in
mitigating
global
climate
change.
Microbially
driven
C,
nitrogen
(N)
sulphur
(S)
cycles
crucial
for
ecosystem
functioning,
but
how
microorganisms
drive
sink
formation
sequestration
coastal
sediments
remains
unclear.
In
this
study,
we
conducted
a
comprehensive
analysis
of
amino
sugars,
N
S
cycling
genes/pathways
their
associated
taxa
native
(
Cyperus
malaccensis
Kandelia
obovata
)
alien
Spartina
alterniflora
Sonneratia
apetala
vegetation.
Compared
to
the
alien‐vegetated
sediment,
native‐vegetated
sediment
had
significantly
p
<
0.05)
higher
microbial
necromass
functional
potentials
chemoautotrophic
fixation,
degradation,
methane
cycling,
2
oxidation
sulphate
reduction.
Also,
our
microbiomes
showed
that
could
be
coupled
with
fixation
and/or
nitrate/nitrite
oxidation,
degradation
were
found
pathways
predicting
C.
Additionally,
sulphur‐oxidizing
Burkholderiales
metagenome‐assembled
genomes
(MAGs)
group
dominated
sediments.
These
results
suggested
oxidizers,
particular
novel
lineage,
might
dominates
through
anabolism
(C
fixation);the
coupling
microbially
processes;
deposition
derived
This
study
provides
insights
into
importance
oxidizers
shed
new
light
on
mechanism
ecosystems,
which
also
has
important
implications
enhancing
wetlands.
Read
free
Plain
Language
Summary
article
Journal
blog.
Freshwater Biology,
Год журнала:
2024,
Номер
69(4), С. 496 - 508
Опубликована: Фев. 8, 2024
Abstract
Aquatic
sediments
harbour
a
diverse
array
of
microorganisms
that
drive
organic
matter
recycling,
carbon
sequestration
and
greenhouse
gases
(e.g.,
CO
2
,
CH
4
N
O)
emissions.
Although
largely
studied
in
water
columns,
vertical
profiles
the
diversity
composition
prokaryotic
communities
(i.e.,
Bacteria
Archaea)
aquatic
are
still
rare.
More
specifically,
much
remains
to
be
learnt
about
their
distribution
lake
how
environmental
conditions
at
time
burial
have
impacted
composition.
We
investigated
community
with
16S
rRNA
gene
quantitative
(q)PCR
metabarcoding
approaches
applied
93
sediment
layers
collected
2‐m‐long
core
from
eutrophic
alkaline
Lake
Chenghai
subtropical
China.
aimed
study
diversity,
structure
as
well
factors
influencing
it.
Bacterial
abundance
was
found
decrease
depth
although
richness
both
bacterial
archaeal
assemblages
slightly
increased
depth.
In
terms
composition,
strongly
stratified
sediment–depth
pattern
observed
which
Proteobacteria,
Desulfobacterota,
Bacteroidota
Verrucomicrobiota
dominated
inventories
surface
layers,
whereas
Chloroflexi,
Spirochaetota,
Planctomycetota,
Crenarchaeota
were
more
abundant
deep
layers.
Organic
contents
sources
identified
major
shaping
community.
Overall,
our
provides
new
evidence
sediment's
linked
external
energy.
This
complement
existing
data
other
systems
towards
better
understanding
community's
contribution
biogeochemical
cycle
lakes.
