River Research and Applications,
Journal Year:
2023,
Volume and Issue:
40(2), P. 264 - 276
Published: Nov. 21, 2023
Abstract
The
diversity
of
functional
traits
macroinvertebrates
in
freshwater
ecosystems
is
one
the
current
research
hotspots
field
biodiversity.
Understanding
trait
composition
and
their
factors
can
make
study
watershed
beta
river
ecological
security
patterns
more
effective.
Based
on
two
surveys
conducted
September
2020
July
2021
Qingyijiang
(QYJ)
River,
longest
tributary
south
bank
lower
Yangtze
River
China,
we
explored
compositions
relationships
between
water
environment
using
indices,
decomposition,
R‐mode
linked
to
Q‐mode,
fourth‐corner
analysis
methods.
Our
results
showed
that
environmental
affected
distribution
traits,
degree
effect
was
reflected
by
correlation
abundance
species
traits.
Physical
like
flow
velocity
depth
were
significantly
correlated
with
biological
such
as
body
size
swimming
ability.
In
counterparts,
some
nutrient
indicators
total
phosphorus,
ammonia
nitrogen,
chemical
oxygen
demand,
which
habits
feeding
group
At
same
time,
also
found
a
high
turnover
rate
communities
river,
reflecting
strong
dispersal
ability
species.
This
will
be
an
important
guide
for
conservation
river.
Local
governments
take
measures
conducting
quarterly
monitoring
species;
restoring
riparian
vegetation;
limiting
hardening
riverbanks
dredging
rivers;
controlling
wastewater
discharges
from
residential
areas
both
sides
river;
use
pesticides
agricultural
lands,
so
on.
These
become
key
directions
diversity.
Aquatic Conservation Marine and Freshwater Ecosystems,
Journal Year:
2025,
Volume and Issue:
35(2)
Published: Feb. 1, 2025
ABSTRACT
Artificial
reefs
enhance
marine
biodiversity
by
increasing
habitat
complexity
and
heterogeneity,
which
in
turn
provide
living
space
for
various
species.
Macrobenthos,
an
important
component
of
aquatic
ecosystems,
with
limited
mobility
sensitivity
to
environmental
changes,
commonly
serve
as
indicators
ecosystem
health.
This
study,
conducted
the
summer
autumn
2022
Sishili
Bay
(SB)
Changdao
Archipelago
(CA),
Yantai,
China,
aimed
evaluate
effects
artificial
on
macrobenthic
community
structure
using
functional
trait
analysis.
The
nonmetric
multidimensional
scaling
(nMDS)
analysis
based
species
abundance
occurrence
frequency
did
not
reveal
any
clear
separation
between
areas
inside
outside
reefs.
However,
construction
increased
number
macrobenthos,
especially
Mollusca
Feeding
type,
a
key
trait,
distinguished
reefs,
significant
spatial
temporal
variations.
driving
differences
reef
nonreef
include
carnivorous
Lumbrineris
longifolia
Glycinde
bonhourei
omnivorous
Eriopisella
sechellensis
Sigambra
bassi
,
were
pivotal
observed
variations
relative
abundance.
Functional
richness
(FRic)
(
S
)
showed
consistent
patterns
variation,
both
contributing
improving
stability
summer.
autumn,
was
reduced
extraordinary
dominance
single
Multiple
factors
rather
than
one
significantly
influenced
distribution
diversity,
reflecting
complex
interplay
seasonal
dynamics.
study
used
assess
impact
structure,
offering
more
effective
measure
species‐level
assessments.
Journal of Lake Sciences,
Journal Year:
2024,
Volume and Issue:
36(2), P. 536 - 547
Published: Jan. 1, 2024
自然流淌的支流在维持建坝河流水生生物多样性中起着重要作用。补远江是澜沧江下游的重要一级支流,保持了较为天然的河流状态,人类活动干扰相对较少,是流域土著鱼类保护区和水生生物重要栖息地。在澜沧江流域水电开发的背景下,掌握补远江大型底栖动物群落结构的时空分布及其影响因素,对澜沧江乃至西南河流的水生生物多样性保护和恢复具有重要参考意义。于2019年4月(旱季)和2019年10月(雨季)对补远江的大型底栖动物进行了详细调查,共检出大型底栖动物150个分类单元,隶属于5门7纲68科,其中水生昆虫121种,软体动物20种,蛭类3种,寡毛类2种,甲壳类2种,涡虫、线虫各1种。毛翅目和蜉蝣目为全流域优势类群。补远江底栖动物密度和生物量在旱季和雨季均表现为上游大于中下游,物种丰富度和Shannon-Wiener多样性指数在雨季显著高于旱季。功能摄食类群中,滤食者(41.09%)和收集者(31.81%)占绝对优势,其次为刮食者(11.00%)、捕食者(11.21%),撕食者(4.89%)较少。Mantel检验分析表明,河宽(RW)、硝态氮(NO3--N)、化学需氧量(CODMn)是影响补远江大型底栖动物群落结构的主要环境因子;不同功能摄食类群所受到的环境影响因素不同。生物指数(BI)和生物监测工作组记分(BMWP)系统评价显示,补远江大部分样点处于良好及以上水平,少数样点处于中等及以下水平,总体水生态状况良好。;Free
flowing
tributaries
are
important
for
maintaining
of
the
aquatic
biodiversity
in
dammed
systems.
As
an
first-class
tributary
lower
reaches
Lancang
River,
Buyuan
River
maintains
a
relatively
natural
state
with
little
anthropogenic
disturbance,
serving
as
habitat
indigenous
fish
and
organisms
basin.
In
context
hydropower
development
basin,
knowledge
on
spatio-temporal
distribution
macroinvertebrate
community
its
influencing
factors
great
significance
to
conservation
restoration
rivers
southern
China.
To
address
these
issues,
detailed
survey
was
conducted
April
2019
(dry
season)
October
(rainy
season).
result,
total
150
taxa
were
detected,
belonging
5
phyla,
7
classes
68
families,
including
121
insect
species,
20
mollusca
3
leeches,
2
oligochaetes,
crustaceans,
1
planaria
nematode.
Trichoptera
ephemeroptera
dominant
groups
whole
The
density
biomass
species
upper
higher
than
those
middle
both
dry
rainy
seasons.
richness
Shannon-Wiener
diversity
index
significantly
season
season.
Among
functional
feeding
groups,
filter-collectors
(41.09%)
gather-collectors
(31.81%)
dominated,
followed
by
scrapers
(11.00%),
predators
(11.21%)
shredders
(4.89%).
Mantel
test
showed
that
river
width
(RW),
NO3--N
chemical
oxygen
demand
(CODMn)
main
environmental
affecting
fauna
River.
Meanwhile,
different
affected
factors.
evaluation
biological
monitoring
working
party
most
sample
sites
at
good
level
above
(only
few
medium
below),
overall
water
ecological
condition
good.
River Research and Applications,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 15, 2024
Abstract
Run‐of‐river
(R‐O‐R)
hydropower
dams
introduce
two
discontinuities
in
the
river:
dam
and
tailrace.
Discontinuities
can
lead
to
changes
water
quality
that
may
affect
survival
of
aquatic
macroinvertebrates,
depending
on
their
traits.
We
investigated
invertebrate
assemblage
community‐level
traits
an
urban
river
influenced
by
a
small
tailrace
Hokkaido,
Japan.
As
result
inflow
main
channel,
bypassed
reach
was
warmer,
areas
below
confluence
were
colder.
Temperature
consistent
factor
affecting
distribution
indicator
taxa
five
major
contributed
most
dissimilarity,
but
other
environmental
factors
also
showed
significant
effects.
At
community
level,
weighted
mean
with
warm
preference
positive
relationship
temperature,
cold
did
not
appear
be
filtered
delivered
However,
sensitive
such
as
Ephemerella
have
already
started
showing
negative
responses
temperature.
The
observed
cold‐preferring
scrapers
could
negatively
energy
transfer
from
primary
producers
higher
consumers
reach.
Appropriate
mitigation
climate
change
effects
systems
achieved
increasing
flow
reach,
especially
during
summer
months,
maintain
temperature
regime
is
adequate
for
macroinvertebrate
populations
maintenance
ecosystem
functions.
Ecohydrology,
Journal Year:
2024,
Volume and Issue:
17(5)
Published: May 22, 2024
Abstract
The
impact
of
two
high‐head
dams
on
macroinvertebrate
communities
within
the
regulated
reaches
Wujiang
River
in
China
was
explored,
using
longitudinal
monitoring
data
spanning
from
2006
to
2016.
In
this
study,
we
set
up
10
sampling
sites
categorized
into
four
areas
based
different
stressors
and
defined
three
stages
timeline
dam
construction.
Our
findings
revealed
significant
changes
community
composition
before
after
impoundment.
While
certain
original
dominant
taxa,
such
as
Rivularia
globosa
Lithoglyphopsis
ovatus
,
remained
throughout
stages,
mayflies
caddisflies
nearly
vanished
downstream
dams.
This
trend
accompanied
by
disappearance
taxa
with
low
adaptability
emergence
tolerant
Additionally,
typical
limnological
colonized
inundated
reaches.
Dam
impoundment
affected
not
only
but
also
diversity.
recovery
effect
observed
due
limited
distance,
presence
Wujiangdu
upstream
for
over
20
years
makes
us
believe
that
a
large
river
system,
may
fully
recover
if
distance
is
long
enough.
vulnerable
species
R.
which
demonstrated
remarkable
thrived
dams,
should
be
further
studied
future.
