The Effect of Water Colour on Fish Communities in Boreal lakes
Ecosystems,
Journal Year:
2025,
Volume and Issue:
28(1)
Published: Jan. 3, 2025
Language: Английский
Zooplankton as an Indicator: A Dramatic Shift in Its Composition Following a Sudden Temporal Brownification of a Tropical Oligotrophic Lake in Southern Mexico
Diversity,
Journal Year:
2025,
Volume and Issue:
17(1), P. 58 - 58
Published: Jan. 17, 2025
Lake
Bacalar,
a
fragile
oligotrophic
ecosystem
located
in
the
southeast
of
Yucatan
Peninsula,
Mexico,
suffered
from
sudden
brownification
after
tropical
storm
Cristobal
June
2020
Gulf
Mexico.
The
color
change
was
most
visible
effect
storm,
but
all
other
water
variables
changed
towards
eutrophication.
We
used
light
traps
and
DNA
barcoding
zooplankton
specimens
based
on
previous
baseline
constructed
for
comparison
with
species
found
change.
A
dramatic
shift
community
occurred:
biomass
reduced
to
minimum
20
mites,
five
copepods,
three
cladocerans,
chironomids
six
fish
larvae
disappeared
period
at
least
one
year.
They
were
replaced
by
four
copepod,
23
ephemeropteran
previously
not
registered,
being
characteristic
more
eutrophic
environments.
southernmost
part
lake,
Laguna
Xul-Ha,
which
conserved
its
characteristics,
apparently
became
refuge
original
fauna
whole
system.
did
fully
recover
condition
until
about
two
years
later.
While
system
has
returned
state
described
here,
future
changes
land
use,
including
unsustainable
tourism
expansion,
may
compromise
resilience
induce
hysteresis.
Language: Английский
Wetlands as a solution to water browning: A 3‐year efficiency assessment of outdoor mesocosms
Water Environment Research,
Journal Year:
2025,
Volume and Issue:
97(2)
Published: Feb. 1, 2025
Abstract
Water
browning
is
the
phenomenon
of
increasing
discoloration
in
lakes
and
water
courses
due
to
leaching
organic
matter
from
soils.
This
process
has
ecological,
economic,
social
implications,
such
as
affecting
light
penetration,
oxygen
levels,
nutrient
cycling,
drinking
quality,
recreational
use.
study
investigated
potential
wetlands
a
natural
solution
mitigate
by
reducing
iron.
Six
mesocosms
pilot
scale
were
set
up
studied
for
3
years
their
efficiency
reduce
color,
with
sampling
every
14th
day.
Parameters
measured
changes
dissolved
carbon,
iron,
pH,
conductivity
over
years,
under
different
hydrological
climatic
conditions.
The
results
showed
that
can
decrease
retaining
especially
vegetated
systems.
long
retention
times
shallow
systems
needed
color
47%.
was
primarily
reduction
iron
decreased
66%,
while
carbon
(DOC)
concentration
only
6%.
These
findings
highlight
constructed
valuable
tool
improving
quality
mitigating
impacts
browning,
though
further
optimization
wetland
design
integration
broader
land‐use
strategies
address
this
complex
issue
effectively.
Practitioner
Points
Constructed
brownification,
wetlands.
Iron
more
strongly
correlated
colour
than
DOC
reduction.
Vegetated
reduced
inflow
47%
after
14‐day
time.
Wetlands
need
time
colour,
should
be
placed
far
upstream
watershed.
may
use
alternative
pathways,
like
biofilm
formation,
humic
substances,
independent
UV
exposure.
Language: Английский
Seasonal fluctuations in pigment content of macrophytes: implications for monitoring brownification
Hydrobiologia,
Journal Year:
2023,
Volume and Issue:
851(3), P. 633 - 648
Published: Sept. 28, 2023
Abstract
Seasonal
variations
of
floating-leaved
macrophyte
Nuphar
lutea
chlorophyll
content
were
studied
in
lakes
with
different
water
quality.
The
aim
was
to
investigate
whether
the
plants
could
be
used
as
an
indicator
brownification.
relationship
between
a
and
b
(CHL
:
)
petioles
decreased
increasing
colour.
CHL
turbidity
less
clear.
sum
concentration
did
not
respond
colour
consistently.
strong
effect
on
petiole
probably
due
attenuation
short-wavelength
light.
absorbs
light
more
effectively
than
a.
To
maximize
harvesting
light,
macrophytes
increase
their
relative
.
results
suggested
that
N.
can
High
phytoplankton
biomass
may,
however,
disturb
Therefore,
most
reliable
are
obtained
by
sampling
several
times
during
growing
season.
floating
leaves
cannot
recommended
brownification
indicators
because
is
weak.
Language: Английский
Response Rate of Submerged Macrophyte Chlorophyll Content Under Changing Light Conditions
Satu Estlander,
No information about this author
Salla Rajala,
No information about this author
Ella Pippingsköld
No information about this author
et al.
Published: Jan. 1, 2023
Lake
browning,
i.e.
a
gradual
and
long-term
increase
in
the
water
colour,
is
recognized
topical
quality
problem
that
has
received
much
less
attention
protection
than
eutrophication.
Consequently,
new
indicators
are
needed
to
monitor
lake
browning.
Recent
study
suggests
chlorophyll
content
of
macrophytes
promising
indicator
for
assessing
yet
little
known
about
how
quickly
changes
total
aquatic
plants
occur.
For
instance,
it
not
whether
reflects
momentary
light
availability
or
longer-term
environment
lake.
The
objectives
this
experimental
were
investigate
their
response
time
availability.
Our
shows
change
within
5–7
days
macrophyte
intensity
variation,
suggesting
sudden
weather
should
be
reflected
data.
Thus,
our
corroborates
idea
using
as
bioindicators
Language: Английский