E3S Web of Conferences,
Год журнала:
2023,
Номер
420, С. 09007 - 09007
Опубликована: Янв. 1, 2023
A
comprehensive
analysis
of
plankton
and
benthic
communities,
composition,
structure
quantitative
characteristics
indicate
that
the
ecosystem
Lake
Kroshnozero
has
a
eutrophic
status
or
transitional
one
between
β-mesotrophic
α-eutrophic.
Plankton
communities
are
in
stable
state
provide
sustainable
food
base
for
planktivores
fishes.
slight
decrease
indicators
benthos
is
possibly
due
to
methodological
features
sampling
underestimation
littoral
communities.
The
composition
have
been
preserved
since
previous
studies
50-90s
last
century.
ichthyofauna
includes
13
fish
species.
Whitefish,
zander,
vendace
commercial
importance.
Fish
secondary
importance
bream,
perch,
ruff,
roach,
pike.
such
as
bleak,
grayling
sculpin,
burbot
relatively
rare
do
not
serve
objects
fishing.
Model
calculations
productivity
planktivores,
benthophages
predatory
fish,
taking
into
account
losses
2.3
kcal/m
2
per
season
22.6
kg/ha.
average
modelled
ichthyomass
4.6
Possible
catches
third
equal
7.5
To
improve
quality
quantity
stocks,
recommendations
given
preserve
conditions
reproduction
growth
valuable
fish.
Desalination and Water Treatment,
Год журнала:
2024,
Номер
317, С. 100013 - 100013
Опубликована: Янв. 1, 2024
The
resource
utilization
of
sheep
dung
from
farming
waste
was
evaluated
in
adsorption
total
phosphorus
(TP).
Four
types
modified
activated
carbon
(SDAC)
were
prepared:
SDAC
without
metal
(SDAC-N),
with
lanthanum
(SDAC-La),
magnesium
(SDAC-Mg),
and
La
Mg
(SDAC-La-Mg).
various
SDACs
prepared
tested
the
TP
wastewater.
main
components
SDAC-La-Mg
surface
MgO
La2O3.
rich
functional
groups
such
as
CC
CO
acquired
a
negative
charge.
At
25
°C
pH
4,
capacity
1.94
mg/g.
Among
four
adsorbents,
exhibited
highest
capacity.
by
followed
secondary
kinetic
Langmuir
isothermal
models,
primarily
through
chemisorption
mechanisms
ion
exchange,
chemical
precipitation,
covalent
bonding.
regenerated,
removal
rate
remained
at
65%
after
three
regeneration
cycles.
ions
combine
carboxylate
to
form
ligand
compounds,
enabling
displacing
-OH
group
on
an
inner
complex.
Thus,
can
be
used
effective
adsorbent
for
wastewater
treatment.
Environmental Technology & Innovation,
Год журнала:
2023,
Номер
33, С. 103465 - 103465
Опубликована: Дек. 3, 2023
The
great
application
potential
of
hydrogel
adsorbent
in
water
treatment
has
been
widely
reported
recent
years.
However,
practical
is
severely
restricted
due
to
the
tedious
preparation
procedures,
high
energy
consumption,
and
environmental
threat
spent
after
adsorption.
To
address
these
challenges,
a
new
method
was
proposed
this
study
prepare
granular
composites
through
one-step
polymerization
induced
phase
separation
(PIPS),
initiated
via
redox
reaction
consisting
with
calcined
oil
shale
semi-coke
(COSSC)
active
ingredients
green
tea
(GT)
at
40
oC.
Then
applied
remove
NH4-N
wastewater,
adsorbing
used
as
medium
for
plant
growth.
exhibited
favorable
swelling
capacity
205
g/g
excellent
adsorption
40.2
mg/g
NH4-N.
Remarkably,
process
achieved
equilibrium
only
within
30
min.
avoid
influence
soil
other
factors,
we
conducted
soilless
cultivation
experiment,
results
showed
that
total
seed
biomass
mung
bean
increased
by
33.69%
adding
1%
hydrogels
into
culture
medium.
Based
on
above
performance,
presented
feasible
idea
offered
promising
strategy
sustainable
utilization
adsorbent.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 26, 2024
Research
programs
on
Biodiversity-Ecosystem
Functioning
(BEF)
and
Food
Web
Structure
(FWS)
have
contributed
to
understanding
the
impact
of
biodiversity
functioning
architecture
ecosystems,
but
interconnectedness
between
these
components
was
seldom
attended
until
recently.
Several
theoretical
hypotheses
predict
an
interconnection
BEF
FWS
were
poorly
independently
evaluated.
We
estimated
63
sink
food
webs
predatory
fish
in
Parana
River,
covering
a
large
gradient
community
richness.
evaluated
available
their
interrelationship
through
path
analyses.
A
well-supported
causal
structure
identified,
supporting
that
species
richness
directly
increased
standing
biomass,
modularity,
intermodular
connection,
whereas
decreased
interaction
strength,
connectance,
nestedness.
direct
positive
effect
modularity
connectance
biomass
indicates
can
determine
BEF.
Richness
promotes
increase
also
decrease
due
decay
with
similar
negative
effects
biomass.
In
this
sense,
relationship
diversity
ecosystem
cannot
be
blind
FWS.
Environmental
homogenization
reduction
functional
may
undermine
conditions
for
modular
webs,
switching
ones
potential
cascading
whole
ecosystem.
