Scientific Reports,
Год журнала:
2022,
Номер
12(1)
Опубликована: Июнь 1, 2022
Abstract
Sustainable
agricultural
practices
such
as
cover
crops
(CCs)
and
residue
retention
are
increasingly
applied
to
counteract
detrimental
consequences
on
natural
resources.
Since
agriculture
affects
soil
properties
partly
via
microbial
communities,
it
is
critical
understand
how
these
respond
different
management
practices.
Our
study
analyzed
five
CC
treatments
(oat,
rye,
radish,
rye-radish
mixture
no-CC)
two
crop
managements
(retention/R+
or
removal/R−)
in
an
8-year
diverse
horticultural
rotation
trial
from
ON,
Canada.
effects
were
small
but
stronger
than
those
of
management.
Radish-based
CCs
tended
be
the
most
beneficial
for
both
abundance
richness,
yet
fungal
evenness.
species,
particular
also
shaped
and,
a
lesser
extent,
prokaryotic
community
composition.
Crop
residues
modulated
bacterial
evenness
(i.e.,
more
sensitive
R−
R+),
well
taxa.
Several
structure
features
(e.g.,
composition,
taxa
within
Actinobacteria,
Firmicutes
Ascomycota),
some
affected
by
CCs,
correlated
with
early
biomass
production
following
tomato
crop.
suggests
that,
whereas
mid-term
small,
they
need
better
understood
could
influencing
cash
productivity
plant-soil
feedbacks.
The ISME Journal,
Год журнала:
2023,
Номер
17(9), С. 1358 - 1368
Опубликована: Июль 14, 2023
Ammonia
oxidising
archaea
are
among
the
most
abundant
living
organisms
on
Earth
and
key
microbial
players
in
global
nitrogen
cycle.
They
carry
out
oxidation
of
ammonia
to
nitrite,
their
activity
is
relevant
for
both
food
security
climate
change.
Since
discovery
nearly
20
years
ago,
major
insights
have
been
gained
into
carbon
metabolism,
growth
preferences
mechanisms
adaptation
environment,
as
well
diversity,
abundance
environment.
Despite
significant
strides
forward
through
cultivation
novel
omics-based
approaches,
there
still
many
knowledge
gaps
metabolism
which
enable
them
adapt
microorganisms
typically
considered
metabolically
streamlined
highly
specialised.
Here
we
review
physiology
archaea,
with
focus
aspects
metabolic
versatility
regulation,
discuss
these
traits
context
nitrifier
ecology.
Water Research X,
Год журнала:
2022,
Номер
15, С. 100131 - 100131
Опубликована: Март 14, 2022
Nitrification,
the
oxidation
of
ammonia
to
nitrate
via
nitrite,
is
important
for
many
engineered
water
treatment
systems.
The
sequential
steps
this
respiratory
process
are
carried
out
by
distinct
microbial
guilds,
including
ammonia-oxidizing
bacteria
(AOB)
and
archaea
(AOA),
nitrite-oxidizing
(NOB),
newly
discovered
members
genus
Nitrospira
that
conduct
complete
(comammox).
Even
though
all
these
nitrifiers
have
been
identified
within
systems,
their
relative
contributions
nitrogen
cycling
poorly
understood.
Although
AOA
contribute
nitrification
in
wastewater
plants,
they
generally
outnumbered
AOB.
In
contrast,
comammox
typically
dominate
relatively
low
environments
such
as
drinking
treatment,
tertiary
aquaculture/aquarium
filtration.
Studies
focus
on
abundance
oxidizers
may
misconstrue
actual
role
nitrifying
guilds
play
a
system.
Understanding
which
active
useful
further
optimization
systems
rely
removal.
This
review
highlights
known
distributions
suggests
future
research
directions
will
help
assess
identify
factors
influence
activity.
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(16), С. 11578 - 11588
Опубликована: Июль 25, 2022
Acidic
nitrification
is
attracting
wide
attention
because
it
can
enable
robust
suppression
of
nitrite-oxidizing
bacteria
(NOB)
in
wastewater
treatment.
This
study
reports
a
comprehensive
assessment
the
novel
acidic
process
to
identify
key
factors
that
govern
stable
nitrite
accumulation.
A
laboratory-scale
moving-bed
biofilm
reactor
receiving
low-alkalinity
was
continuously
operated
under
conditions
(pH
<
6)
for
around
two
years,
including
nine
stages
varying
influent
and
operational
conditions.
The
results
revealed
accumulation
related
three
factors,
i.e.,
ammonium
concentration,
operating
pH,
ammonia-oxidizing
microbial
community.
These
impact
by
altering
situ
concentration
free
nitrous
acid
(FNA),
which
potent
inhibitor
NOB.
critical
FNA
approximately
one
part
per
million
(ppm,
∼1
mg
HNO2-N/L),
above
stably
maintained
an
nitrifying
system.
findings
this
suggest
via
ammonia
oxidation
be
range
conditions,
as
long
ppm-level
established.
Taking
low-strength
mainstream
(40–50
NH4+-N/L)
with
limited
alkalinity
example,
experimentally
demonstrated
at
pH
4.35,
2.3
±
0.6
HNO2-N/L
attained.
Under
these
Candidatus
Nitrosoglobus
became
only
oxidizer
detectable
16S
rRNA
gene
sequencing.
deepen
our
understanding
systems,
informing
further
development
treatment
technologies.
Trends in Ecology & Evolution,
Год журнала:
2023,
Номер
38(10), С. 936 - 945
Опубликована: Май 24, 2023
The
environmental
niche
concept
describes
the
distribution
of
a
taxon
in
environment
and
can
be
used
to
understand
community
dynamics,
biological
invasions,
impact
changes.
uses
applications
are
still
restricted
microbial
ecology,
largely
due
complexity
systems
associated
methodological
limitations.
development
shotgun
metagenomics
metatranscriptomics
opens
new
ways
investigate
by
focusing
on
metabolic
within
space.
Here,
we
propose
framework,
which,
defining
fundamental
realised
microorganisms,
has
potential
not
only
provide
novel
insights
into
habitat
preferences
metabolism
associated,
but
also
inform
plasticity,
shifts,
invasions.
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(51), С. 21503 - 21526
Опубликована: Дек. 14, 2023
Innovation
in
decarbonizing
wastewater
treatment
is
urgent
response
to
global
climate
change.
The
practical
implementation
of
anaerobic
ammonium
oxidation
(anammox)
treating
domestic
the
key
reconciling
carbon-neutral
management
with
sustainable
development.
Nitrite
availability
prerequisite
anammox
reaction,
but
how
achieve
robust
nitrite
supply
and
accumulation
for
mainstream
systems
remains
elusive.
This
work
presents
a
state-of-the-art
review
on
recent
advances
anammox,
paying
special
attention
available
pathways
(forward-going
(from
nitrite)
backward-going
nitrate
nitrite)),
controlling
strategies,
physiological
ecological
characteristics
functional
microorganisms
involved
supply.
First,
we
comprehensively
assessed
nitrite-oxidizing
bacteria
control
methods,
outlining
that
these
technologies
are
transitioning
possessing
multiple
selective
pressures
(such
as
intermittent
aeration
membrane-aerated
biological
reactor),
integrating
side
stream
free
ammonia/free
nitrous
acid
suppression
recirculated
sludge
treatment),
maintaining
high
activity
ammonia-oxidizing
competing
oxygen
bacteria.
We
then
highlight
emerging
strategies
supply,
including
production
driven
by
novel
microbes
(ammonia-oxidizing
archaea
complete
ammonia
bacteria)
reduction
(partial
denitrification
nitrate-dependent
methane
oxidation).
resources
requirement
different
analyzed,
hybrid
pathway
combining
partial
nitrification
encouraged.
Moreover,
data-driven
modeling
process
well
proactive
microbiome
proposed
hope
achieving
application.
Finally,
existing
challenges
further
perspectives
highlighted,
i.e.,
investigation
nitrite-supplying
bacteria,
scaling-up
from
laboratory
under
real
conditions,
stable
performance
fundamental
insights
this
aim
inspire
advance
our
understanding
about
provide
robustly
shed
light
important
obstacles
warranting
settlement.
The ISME Journal,
Год журнала:
2023,
Номер
17(7), С. 993 - 1003
Опубликована: Апрель 17, 2023
The
recent
discovery
of
Nitrospira
species
capable
complete
ammonia
oxidation
(comammox)
in
non-marine
natural
and
engineered
ecosystems
under
mesothermal
conditions
has
changed
our
understanding
microbial
nitrification.
However,
little
is
known
about
the
occurrence
comammox
bacteria
or
their
ability
to
survive
moderately
thermal
and/or
hyperthermal
habitats.
Here,
we
report
wide
distribution
five
terrestrial
hot
springs
at
temperatures
ranging
from
36
80°C
provide
metagenome-assembled
genomes
11
new
strains.
Interestingly,
identification
dissimilatory
nitrate
reduction
ammonium
(DNRA)
thermophilic
lineages
suggests
that
they
have
versatile
ecological
functions
as
both
sinks
sources
ammonia,
contrast
described
mesophilic
lineages,
which
lack
DNRA
pathway.
Furthermore,
situ
expression
key
genes
associated
with
nitrogen
metabolism,
adaptation,
oxidative
stress
confirmed
studied
contribution
nitrification
these
environments.
Additionally,
smaller
genome
size
higher
GC
content,
less
polar
more
charged
amino
acids
usage
profiles,
a
large
number
heat
shock
proteins
compared
strains
presumably
confer
tolerance
stress.
These
novel
insights
into
occurrence,
metabolic
activity,
adaptation
habitats
further
expand
global
significant
implications
for
how
unique
microorganisms
evolved
strategies.