Frontiers in Microbiology,
Journal Year:
2022,
Volume and Issue:
13
Published: Sept. 29, 2022
Unraveling
the
mechanisms
structuring
microbial
community
is
a
central
goal
in
ecology,
but
detailed
understanding
of
how
assembly
processes
relate
to
living
habitats
still
lacking.
Here,
via
16S
rRNA
gene
amplicon
sequencing,
we
investigated
process
communities
different
[water
verse
sediment,
free-living
(FL)
particle-associated
(PA)]
and
their
impacts
on
inter-taxa
association
patterns
coastal
Bohai
Sea,
China.
The
results
showed
clear
differences
composition
diversity
among
habitats,
with
greater
dissimilarities
between
water
column
sediment
than
FL
PA
communities.
was
dominated
by
dispersal
limitation,
ecological
drift,
homogeneous
selection,
relative
importance
varied
habitats.
planktonic
were
mainly
shaped
limitation
whereas
selection
played
more
important
role
benthic
Furthermore,
differed
communities,
especially
bottom
effect
drift
fractions,
respectively.
Linking
co-occurrence
pattern
that
contribution
deterministic
(mainly
selection)
increased
under
closer
relationships.
By
contrast,
stochastic
exerted
higher
when
there
less
connections.
Overall,
our
findings
demonstrate
contrasting
underpinning
distribution
including
lifestyles,
which
indicate
complex
dynamic
systems
high
anthropogenic
perturbations.
The ISME Journal,
Journal Year:
2020,
Volume and Issue:
14(6), P. 1463 - 1478
Published: March 4, 2020
Studies
of
marine
benthic
archaeal
communities
are
updating
our
view
their
taxonomic
composition
and
metabolic
versatility.
However,
large
knowledge
gaps
remain
with
regard
to
community
assembly
processes
inter
taxa
associations.
Here,
using
16S
rRNA
gene
amplicon
sequencing
qPCR,
we
investigated
the
spatiotemporal
dynamics,
processes,
co-occurrence
relationships
in
58
surface
sediment
samples
collected
both
summer
winter
from
across
~1500
km
eastern
Chinese
marginal
seas.
Clear
patterns
dynamics
structure
were
observed,
a
more
pronounced
spatial
rather
than
seasonal
variation.
Accompanying
geographic
variation
was
significant
distance-decay
pattern
varying
contributions
different
clades,
determined
by
relative
abundance.
In
seasons,
dispersal
limitation
most
important
process,
explaining
~40%
variation,
followed
homogeneous
selection
ecological
drift,
that
made
an
approximately
equal
contribution
(~30%).
This
meant
stochasticity
determinism
had
greater
impact
on
assembly.
Furthermore,
observed
seasonality
patterns:
closer
inter-taxa
connections
summer,
unmatched
between
relationship.
These
results
demonstrate
assembled
under
seasonal-consistent
mechanism
but
changed
over
indicating
complex
dynamic
coastal
sediments
Frontiers in Marine Science,
Journal Year:
2020,
Volume and Issue:
7
Published: Aug. 18, 2020
To
better
understand
the
relationship
between
subsurface
seasonal
deoxygenation
and
acidification
in
Yellow
Sea
northern
East
China
(ECS),
we
examined
carbonate
system
parameters
dissolved
oxygen
(DO)
of
seven
field
surveys
conducted
2017–2018,
spanning
all
four
seasons.
Low
pHT
values
7.71‒7.80
critically
low
aragonite
saturation
state
(Ωarag)
1.07‒1.40
along
with
undersaturated
DO
mostly
higher
than
150
μmol
O2
kg–1
occurred
Cold
Water
Mass
area
summer
autumn,
while
hypoxic
49‒63
extremely
7.68‒7.74
as
well
Ωarag
1.21‒1.39
were
observed
ECS
July
2018.
At
beginning
warm-season
stratification
formation,
cold
waters
had
much
but
lower
those
relatively
warmer
waters,
yearly
initial
rarely
exhibited
differences
two
coastal
seas.
During
warm
seasons,
central
accumulated
respiration
products
beneath
thermocline
bottom
preserved
them
only
summer.
This
study
highlights
fundamental
roles
wintertime
carbon
dioxide
(CO2)
solubility
a
north-to-south
latitude
gradient
development.
In
comparison
low-latitude
subject
to
hypoxia,
high-latitude
exhibits
CO2
winter
longer
respiration-product
accumulations
leading
ECS.
However,
present-day
is
free
from
hypoxia.
