Water,
Journal Year:
2023,
Volume and Issue:
15(3), P. 399 - 399
Published: Jan. 18, 2023
Fish
are
among
the
main
target
groups
when
conducting
biomonitoring
and
ecological
assessment
of
aquatic
environments.
Environmental
DNA
(eDNA)
metabarcoding
provides
a
unique
opportunity
to
enhance
throughput,
precision,
standardization.
However,
few
fish
monitoring
studies
based
on
eDNA
have
been
conducted
at
basin
scale.
Taking
Dianchi
Lake
three
inflowing
rivers
(Panlong
River,
Baoxiang
Chai
River)
as
research
objects,
this
study
monitored
diversity
via
metabarcoding,
Index
Biological
Integrity
(F-IBI)
was
constructed
applied
for
environment.
Here,
we
detected
41
species
belonging
9
orders,
15
families,
35
genera
in
sampling
areas,
including
17
native
such
Hemiculter
leucisculus,
Cyprinus
carpio,
Silurus
soldatovi.
Distinct
patterns
were
observed
rivers.
Particularly,
Panlong
River
richer
than
that
Lake,
River.
Water
temperature
(WT),
chemical
oxygen
demand
(COD),
total
nitrogen
(TN),
phosphorus
(TP)
significantly
influenced
distribution
communities
most
sites
(p
<
0.05).
Moreover,
according
F-IBI
system,
25%
defined
‘fine’
or
above,
75%
‘impaired’
below.
This
provided
insights
into
restoration
precise
management
environment
basin.
Environment International,
Journal Year:
2025,
Volume and Issue:
195, P. 109280 - 109280
Published: Jan. 1, 2025
Water
diversion
projects
effectively
mitigate
the
uneven
distribution
of
water
resources
but
can
also
influence
aquatic
biodiversity
and
ecosystem
functions.
Despite
their
importance,
impacts
such
on
multi-domain
microbial
community
dynamics
underlying
mechanisms
remain
poorly
understood.
Utilizing
high-throughput
sequencing,
we
investigated
bacterial,
archaeal,
fungal
along
eastern
route
South-to-North
project
during
both
non-water
period
(NWDP)
(WDP).
Our
findings
revealed
competitive
exclusion
effects
among
bacterial
archaeal
communities
WDP,
characterized
by
decreased
species
richness
increased
biomass,
while
biomass
significantly
declined.
Distance-decay
relationships
suggested
homogenization
WDP.
Robustness
analyses
reduced
stability
with
primarily
influencing
stability,
environmental
factors
had
a
greater
impact
communities.
Stochastic
processes,
homogenizing
dispersal
drift,
intensified
for
Notably,
only
functional
diversity
relative
abundance
chemoheterotrophic
organic
compound
catabolic
bacteria
declined
photoautotrophic
bacteria.
PLS-PM
indicated
that
shaped
assembly
processes
guilds,
whereas
This
study
enhances
our
understanding
WDP
underscores
importance
assessing
direct
resulting
fluctuations.
Environmental Research,
Journal Year:
2025,
Volume and Issue:
unknown, P. 121025 - 121025
Published: Feb. 1, 2025
To
evaluate
the
potential
differences
in
plankton
diversity
and
stability
within
freshwater
lake
reservoir
ecosystems,
this
study
employed
eDNA
metabarcoding
to
analyze
diversity,
assembly
mechanisms,
stability,
environmental
drivers
of
communities
natural
water
(Y
region)
artificial
(M
at
Liupanshui
Minghu
National
Wetland
Park,
Guizhou
Province,
China.
The
revealed
notable
regional
variations
mechanisms.
Specifically,
Shannon,
Simpson,
Pielou's
evenness
indices
were
higher
M
region,
suggesting
a
more
complex
species
composition
compared
Y
region.
Analysis
community
mechanisms
indicated
that
both
regions
influenced
by
combination
stochastic
deterministic
processes,
with
processes
serving
as
dominant
driver.
Through
LEfSe
analysis,
Random
Forest
predictions,
molecular
ecological
network
evaluations,
certain
OTUs
identified
"dual-characteristic"
consistently
highlighted.
These
may
play
critical
role
shaping
contributing
stability.
Environmental
further
clarified
these
differences.
Redundancy
analysis
(RDA)
demonstrated
TDS
was
primary
factor
driving
key
zooplankton
species,
while
EC
DO
significant
factors
influencing
distribution
phytoplankton
species.
Stability
assessments,
which
combined
coefficient
variation
population
density,
This
indicates
system
has
greater
resistance
disturbances
findings
provide
fundamental
support
for
assessing
health
aquatic
well
effective
monitoring
biodiversity
conservation
ecosystems.
