bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2022,
Номер
unknown
Опубликована: Июль 20, 2022
Abstract
Our
decreasing
ability
to
fight
bacterial
infections
is
a
major
health
concern.
It
arising
due
the
evolution
of
antimicrobial
resistance
(AMR)
in
response
mis-
and
overuse
antibiotics
both
human
veterinary
medicine.
Lakes
integrate
watershed
processes
thus
may
act
as
receptors
reservoirs
antibiotic
genes
(ARGs)
introduced
into
by
activities.
The
resistome
-
diversity
ARGs
–
under
varying
anthropogenic
pressures
has
been
previously
studied
either
focused
on
few
select
or
lakes.
Here,
we
link
∼350
lakes
sampled
across
Canada
activity,
trophic
status,
well
point
sources
ARG
pollution.
A
high
percentage
detected
was
unimpacted
activity
highly
prevalent
pristine
lakes,
highlighting
role
AMR
microbial
ecology
aquatic
systems,
pool
available
for
potential
horizontal
gene
transfer
pathogenic
species.
Nonetheless,
agricultural
pasture
area
significantly
impacted
resistome.
Moreover,
number
hospitals
population
density
watershed,
volume
wastewater
entering
lake,
fraction
manure
applied
fertilizer
diversity.
Together,
these
findings
indicate
that
lake
resistomes
are
regularly
stocked
with
evolved
context
use
represent
require
further
monitoring.
Journal of Plankton Research,
Год журнала:
2024,
Номер
46(1), С. 9 - 24
Опубликована: Янв. 1, 2024
Abstract
There
has
been
limited
research
on
the
abiotic
and
biotic
factors
affecting
prevalence
of
phago-mixotrophy
(prevMixo)
among
nanophytoplankton
across
freshwater
ecosystems.
In
recent
years,
large-scale
sampling
campaigns
like
EPA-National
Lakes
Assessment
NSERC
LakePulse
survey
have
generated
surface
water
community
composition
data
for
hundreds
lakes
North
America,
covering
large
environmental
gradients.
We
present
results
from
our
analyses
these
two
surveys,
focusing
a
taxonomic
comparison
mixoplankton
communities
ecoregions
multivariate
drivers
prevMixo.
identified
potentially
phago-mixotrophic
taxa
in
majority
sites
all
ecozones
sampled.
Lake
trophic
state
was
as
main
predictor
resource-acquisition
strategy
assemblages,
with
lower
diversity
more
eutrophic
lakes.
also
controlled
increased
total
phosphorus
levels
were
associated
loss
diversity.
This
study
represents
most
comprehensive
assessment
prevMixo
lake
to
date
spanning
dozen
ecozones.
Freshwater Biology,
Год журнала:
2022,
Номер
68(11), С. 1799 - 1817
Опубликована: Дек. 5, 2022
Abstract
Analyses
of
sedimentary
DNA
(
sed
DNA)
have
increased
exponentially
over
the
last
decade
and
hold
great
potential
to
study
effects
anthropogenic
stressors
on
lake
biota
time.
Herein,
we
synthesise
literature
that
has
applied
a
approach
track
historical
changes
in
biodiversity
response
impacts,
with
an
emphasis
past
c.
200
years.
We
identified
following
research
themes
are
particular
relevance:
(1)
eutrophication
climate
change
as
key
drivers
limnetic
communities;
(2)
increasing
homogenisation
communities
across
large
spatial
scales;
(3)
dynamics
invasive
species
traced
sediment
archives.
Altogether,
this
review
highlights
draw
more
comprehensive
picture
stressors,
opening
up
new
avenues
field
paleoecology
by
unrevealing
hidden
biodiversity,
building
paleo‐indicators,
reflecting
either
taxonomic
or
functional
attributes.
Broadly,
analyses
provide
perspectives
can
inform
ecosystem
management,
conservation,
restoration
offering
measure
ecological
integrity
vulnerability,
well
functioning.
Remote Sensing Applications Society and Environment,
Год журнала:
2024,
Номер
36, С. 101296 - 101296
Опубликована: Июль 8, 2024
Saudi
Arabia
has
one
of
the
biggest
water
shortages
and
least
vegetation
in
world,
which
is
presumed
to
provoke
this
problem
further
due
climate
change.
Therefore,
present
study
investigates
water,
vegetation,
temperature
over
Al-Asfar
Lake
region,
Al
Ahsa,
Eastern
province
using
Normalized
Difference
Water
Index
(NDWI),
Vegetation
(NDVI),
Land
Surface
Temperature
(LST:
°C)
from
Landsat-8
based
operational
land
imager
(OLI)
measurements
for
period
2013
2023.
This
presented
annual
seasonal
(dry
months:
June–September
wet
December–April)
spatiotemporal
distribution
variations,
calculated
their
absolute
change
trends,
examined
relationship.
Results
showed
positive
NDWI
values
Lake,
indicating
waterbodies;
while
NDVI
on
lake's
bank,
signifying
vegetation.
Notably,
there
were
significant
temporal
variations
observed
annual,
seasonal,
monthly
scales.
The
also
found
an
overall
decrease
areas
5.36
km2
2023
compared
2013,
waterbodies
increased
by
8.83
km2.
trend
analysis
area-averaged
data
demonstrated
that
(0.0075/year)
(dry:
0.0083/year
wet:
0.0049/year)
scales,
decreased
(annual:
0.0066/year,
dry:
0.0083/year,
0.0009/year).
Moreover,
LST
was
recorded
amount
(28.23
(32.45
covered
entire
lake
region
(38.43
°C),
respectively.
Remark,
displayed
decreasing
trends
(−0.05/year),
followed
(−0.17/year),
(−0.0001/year),
are
vital
components
controlling
surface
region.
Finally,
a
correlation
with
negative
NDWI.
There
may
be
direct
indirect
impact
upon
NDVI,
LST,
as
shown
decreases
increase
can
considered
base
document
monitor
waterbodies,
cover,
changes
remote
sensing
NDWI,
will
assist
policymakers
developing
resource
management,
irrigation
planning,
environmental
monitoring
strategies.
Biomolecules,
Год журнала:
2024,
Номер
15(1), С. 31 - 31
Опубликована: Дек. 30, 2024
Microorganisms,
including
bacteria,
fungi,
and
protists,
are
key
drivers
in
aquatic
ecosystems,
maintaining
ecological
balance
normal
material
circulation,
playing
vital
roles
ecosystem
functions
biogeochemical
processes.
To
evaluate
the
environmental
impact
of
different
river
crab
polyculture
practices,
we
set
up
two
(Eriocheir
sinensis)
practices:
one
where
crabs
were
cultured
with
mandarin
fish
(Siniperca
chuatsi),
silver
carp
(Hypophthalmichthys
molitrix),
freshwater
stone
moroko
(Pseudorasbora
parva),
another
just
carp.
These
practices
referred
to
as
PC
MC,
respectively.
We
analyzed
water
bacterial,
fungal,
protist
communities
MC
groups
using
16S,
ITS,
18S
ribosomal
RNA
high-throughput
sequencing.
found
that
group
obviously
increased
diversity
microbial
altered
their
composition.
The
bacterial
community
held
narrowest
habitat
niche
exhibited
weakest
adaption
compared
fungal
communities.
co-occurrence
networks
protist,
leading
more
complex
stable
fungi
protist.
Furthermore,
shifted
assembly
mechanism
from
being
predominantly
deterministic
stochastic
processes,
relatively
minor
impacts
on
Environmental
factors,
especially
dissolved
oxygen
(DO),
significantly
associated
DO
major
contributor
changes
Our
results
suggest
fish,
carp,
was
an
effective
viable
attempt,
it
superior
terms
stability.
Environmental Microbiome,
Год журнала:
2025,
Номер
20(1)
Опубликована: Фев. 17, 2025
Abstract
With
more
than
12
million
inhabitants,
the
Greater
Paris
offers
a
“natural
laboratory”
to
explore
effects
of
eutrophication
on
freshwater
lake’s
microbiomes
within
relative
restricted
area
(~
70
km
radius).
Here,
4-months
survey
was
carried
out
during
summertime
monitor
planktonic
microbial
communities
nine
lakes
located
around
(Île-de-France,
France)
comparable
morphologies,
yet
distinct
trophic
statuses
from
mesotrophic
hypereutrophic.
By
thus
minimizing
confounding
factors,
we
investigated
how
status
could
influence
prokaryotic
community
structures
(16S
rRNA
gene
sequencing)
and
functions
(shotgun
metagenomics).
These
harbored
highly
diverse
communities,
their
appears
as
main
driver
explaining
both
differences
in
structure
functional
potential.
Although
pool
quite
stable
shared
among
lakes,
taxonomical
changes
were
correlated.
According
status,
phosphorus
metabolism-related
genes
highlighted
relevant
involved
biogeochemical
cycles.
Overall,
hypereutrophic
displayed
highest
contrast
heterogeneity
over
time,
suggesting
specific
regime
shift
compared
eutrophic
lakes.
Quaternary Science Reviews,
Год журнала:
2024,
Номер
327, С. 108535 - 108535
Опубликована: Фев. 7, 2024
Human
impacts
on
Earth's
atmosphere,
hydrosphere,
litosphere
and
biosphere
are
so
significant
as
to
naming
a
new
geological
epoch,
the
Anthropocene.
Lakes
their
biota
highly
sensitive
environmental
changes.
Among
aquatic
organisms,
microbial
eukaryotes
play
fundamental
roles
associated
with
lake
ecosystem
functioning,
food
webs,
nutrient
cycling,
pollutant
degradation.
However,
response
of
eukaryotic
community
during
Anthropocene
changes
in
conditions
remain
poorly
understood.
Here,
we
applied
18S
metabarcoding
approach
sedimentary
DNA
reconstruct
temporal
dynamics
over
past
160
years.
We
investigated
influence
biotic
interactions
Sihailongwan
Maar
Lake,
one
candidate
sites
Global
boundary
Stratotype
Section
Point
(GSSP)
for
demarcation
Microbial
were
dominated
by
dinoflagellates,
chlorophytes,
ciliates,
pirsoniales,
rotifers,
ochrophytes,
apicomplexans
cercozoans
that
divided
into
four
functional
groups
photoautotrophs,
mixotrophs,
consumers
parasites.
The
predominance
phototrophs
strong
associations
organisms
from
other
trophic
levels,
confirmed
crucial
energy
flows
services
freshwater
ecosystems.
Abrupt
1950s
diversity
composition
consistent
observed
pollutants
emissions
i.e.,
heavy
metals,
combustion
indices
(spheroidal
carbonaceous
particles,
polycyclic
aromatic
hydrocarbon,
Soot
F14C),
radioactivity
indicators
(239,240Pu,
129I/127I),
nutrients
(total
organic
carbon,
total
nitrogen,
phosphorus),
temperature.
Statistical
analysis
revealed
anthropogenic
drivers
controlled
dynamic
community.
Our
findings
provide
additional
biostratigraphy
evidence
impact
change
this
biota,
which
further
supports
value
system
characterize
Frontiers in Microbiology,
Год журнала:
2022,
Номер
13
Опубликована: Окт. 6, 2022
Our
decreasing
ability
to
fight
bacterial
infections
is
a
major
health
concern.
It
arising
due
the
evolution
of
antimicrobial
resistance
(AMR)
in
response
mis-
and
overuse
antibiotics
both
human
veterinary
medicine.
Lakes
integrate
watershed
processes
thus
may
act
as
receptors
reservoirs
antibiotic
genes
(ARGs)
introduced
into
by
activities.
The
resistome
-
diversity
ARGs
under
varying
anthropogenic
pressures
has
been
previously
studied
either
focused
on
few
select
or
lakes.
Here,
we
link
~350
lakes
sampled
across
Canada
activity,
trophic
status,
well
point
sources
ARG
pollution
including
wastewater
treatment
plants
hospitals
watershed.
A
high
percentage
detected
was
unimpacted
activity
highly
prevalent
pristine
lakes,
highlighting
role
AMR
microbial
ecology
aquatic
systems,
pool
available
for
potential
horizontal
gene
transfer
pathogenic
species.
Nonetheless,
agricultural
pasture
area
significantly
impacted
resistome.
Moreover,
number
population
density
watershed,
volume
entering
lake,
fraction
manure
applied
fertilizer
diversity.
Together,
these
findings
indicate
that
lake
resistomes
are
regularly
stocked
with
evolved
context
use
represent
require
further
monitoring.
Water Research,
Год журнала:
2023,
Номер
231, С. 119596 - 119596
Опубликована: Янв. 9, 2023
Lakes
are
sentinels
of
environmental
changes
within
their
watersheds
including
those
induced
by
a
changing
climate
and
anthropogenic
activities.
In
particular,
contamination
originating
from
point
or
non-point
sources
(NPS)
might
be
reflected
in
the
bacterial
composition
lake
water.
We
assessed
abundance
potentially
pathogenic
bacteria
(PPB)
sampled
413
lakes
8
southern
Canadian
ecozones
that
represent
wide
diversity
watershed
land
use.
The
study
objectives
were
(1)
to
explore
PPB;
(2)
build
fecal
multi-indicator
cluster
co-occurring
(3)
predict
over
thousands
lakes.
identified
taxa
based
on
16S
rRNA
amplicon
sequencing
clustered
33
PPB
matching
ePATHogen
database
using
Sørensen
dissimilarity
index
binary
data
across
One
contained
Erysipelothrix,
Desulfovibrio,
Bacteroides,
Vibrio
Acholeplasma
was
related
NPS
fraction
agriculture
pasture
as
its
main
driver
thus
it
determined
multi-indicator.
subsequently
developed
predictive
model
200
212
which
explained
55.1%
deviance.
Mapping
predictions
showed
higher
abundances
Prairies
Boreal
Plains
compared
other
ecozones.
These
results
first
attempt
map
potential
at
continental
scale,
may
further
improved
future.
Lastly,
demonstrates
capacity
multi-disciplinary
approach
leveraging
both
datasets
derived
remote
sensing
DNA
provide
mapping
information
for
public
health
governmental
policies.
