Applied Ecology and Environmental Research,
Год журнала:
2023,
Номер
21(5), С. 4233 - 4254
Опубликована: Янв. 1, 2023
Bahe
river
is
the
secondary
tributary
of
Yarlung
Zangbo
river,
and
largest
Nyang
River
in
China,
for
which
we
analyzed
microbial
diversity,
community
structure
metabolic
function
diversity
surface
sediments
3
cascade
hydropower
stations
upstream
downstream
their
adjacent
tributaries
were
by
high-throughput
sequencing.The
study
has
shown
that
abundance
station
as
follows
S7(downstream
Laozui
Hydropower
Station),
S3(downstream
606
S5(Zhulaqu
tributary),
S4(upstream
Xueka
S1(upstream
S2
(Zimuzhongnongbaqu
tributary)
S6(downstream
Station/upstream
7
sampling
points
lower
than
those
other
areas.The
predominant
bacteria
are
Proteobacteria,
Cyanobacteria,
Frimicutes,
Actinobacteria,
Bacteroides,
etc.The
dominant
Exiguobacterium,
Tychonema_CCAP_1459-11B,
norank_f__unclassified_o__Oxypotobacteria_Incertae_Sedis,
Hyphobacterium,
Sphingorhabdus,
Leptolyngbya_FYG,
Phytobacter,
Pseudoarthrobacter,
Unclassified_f__
Microbacteriaceae.Predominant
varied
significantly
between
samples.Further
total
phosphorus,
temperature
flow
velocity
main
factors
affecting
plateau
rivers.And
effect
also
affects
structure,
functional
genes,
proteins,
enzymes
FAPROTAX
functions
S3
S4.However,
was
failure
S6,
S7.
Marine Pollution Bulletin,
Год журнала:
2023,
Номер
197, С. 115815 - 115815
Опубликована: Ноя. 18, 2023
The
nutrients
such
as
dissolved
inorganic
nitrogen
(DIN,
NH4+-N,
NO2−-N,
and
NO3−-N),
phosphorus
(DIP,
PO43−)
SiO2
(DSi)
funneled
by
the
inlet
river
are
dominant
factors
to
coastal
eutrophication.
This
study
investigated
nutrient
transport
process
in
typical
rivers
Yellow
River
Delta.
indicator
of
eutrophication
potential
concentration
ratio
between
upstream
downstream
stations
were
used
evaluate
influence
different
sources
risks.
It
showed
that
urban
areas
most
important
source
studied
rivers.
harbor
mariculture
would
have
greater
risk
because
their
proximity
close
area.
Wetland
was
a
vital
conversion
eliminate
nutrients,
retention
could
reach
80
%.
is
imperative
protect
construct
wetlands
reduce
pollution
river.
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 22, 2024
Abstract
The
concentration
profiles
and
diffusion
fluxes
of
PO43−,
NH4+
NO3−
at
the
water-sediment
interface,
along
with
chemical
speciation
phosphorus
heavy
metals
(Pb,
Zn,
Cu,
Cd,
Cr),
were
analyzed
in
three
sediment
cores
from
Sidi
Salem
Dam
lake,
largest
dam
Tunisia.
results
show
that
is
associated
carbonates
(P-Ca
40
to
60%)
iron
0
10
cm
depth
(P-Fe
25
30%).
This
association
seems
be
related
pH
regarding
P-Ca
Eh
P-Fe.
PO43−
are
either
zero
or
directed
towards
water
column
(7
16
µmol
m2
d−
1)
for
NH4+,
excepting
NO3−,
whose
flux
entrance
(-8.44
m−²
1).
Cd
contents
negligible
all
cores;
Zn
Cr
highest
studied
sites;
Pb
Cu
mainly
high
(20
43.7
µg
g−
1
Pb).
Chemical
fractionation
shows
Pb,
residual
phase
(41%,
71%,
53%,
95%,
respectively).
Heliyon,
Год журнала:
2024,
Номер
10(21), С. e40084 - e40084
Опубликована: Ноя. 1, 2024
Hydropower
serves
as
a
very
important
element
of
the
power
system
all
over
world.
And
it
has
positive
impacts
on
both
economic
development
and
slowing
down
climate
change
related
events
such
floods
hydropower
do
not
directly
emit
greenhouse
gas
which
are
ones
main
challenges
facing
humanity
in
However,
apart
from
its
advantages,
there
also
various
disadvantages
mainly
to
natural
environment.
This
article
overviews,
presents
discusses
socio-environmental
construction
operation
Burundi.
Also,
study
classifies
direct
indirect
well
proposing
their
mitigation
strategies.
In
this
crucial
aspect
that
is
discussed
new
look
at
installed
capacity
terms
energy
production
presentation
insufficient
generation
Burundi
one
Sub-Saharan
African
countries
still
with
constant
problem
lack
energy.
The
major
negative
changing
water
quality,
relocation
people,
changes
structure
land
aquatic
communities,
loss
agriculture
production,
landslides
slopes
destabilization
climate.
Another
relevant
design
dams
possibilities
creation
low
flow
reaches,
downstream
reservoir,
Therefore
river
stretches
should
be
remained
minimum
lessen
potentialities
occurrence
hydrological
drought
ecological
damages.
