Water Biology and Security,
Journal Year:
2022,
Volume and Issue:
1(3), P. 100054 - 100054
Published: May 29, 2022
Freshwater
biota
are
more
comprehensive
and
direct
indicators
of
biological
impacts,
meaningful
to
the
public
than
water
quality
or
physical
habitat
surrogates.
biotic
data
multiple
developed
from
them
offer
a
much
richer
array
for
assessing
impacts
pollution
controls
limited
set
chemical
measures.
In
recent
decades,
assemblage-based
assessments
by
ecologists,
environmental
scientists,
agencies
have
been
employed
globally
determining
condition
of,
threats
to,
freshwater
ecosystems.
A
key
step
in
this
advance
has
development
multimetric
indices
(MMIs)
integrity
(IBIs)
based
on
quantitative
algae,
macrophyte,
macroinvertebrate,
fish
riparian
bird
assemblages.
Europe,
where
assemblages
mandated
ecosystem
health,
many
multimetric.
However,
proliferation
MMIs
not
always
occurred
through
application
rigorous
study
designs
monitoring
protocols,
nor
they
effectively
incorporated
functional
metrics,
stressor
assessments,
statistical
analyses.
Therefore,
review,
we
discuss
eleven
major
concerns
with
(including
logistical
limitations)
encourage
widely
applicable
(transferable)
MMI
use
implementation.
Specifically,
our
focus
reference
conditions;
sampling
effort,
methods,
season;
trophic
guild
definition;
metric
comprehensiveness,
options,
screening
scoring;
validation.
could
also
benefit
increased
attention
ecological
mechanisms
development,
further
improve
understanding
anthropogenic
as
well
rehabilitation
effects
ecosystems
globally.
Paying
closer
designs,
should
better
facilitate
degraded
ecosystems,
aiding
conservation
healthy
Nature Communications,
Journal Year:
2019,
Volume and Issue:
10(1)
Published: March 26, 2019
Lakes
and
impoundments
are
an
important
source
of
methane
(CH4),
a
potent
greenhouse
gas,
to
the
atmosphere.
A
recent
analysis
shows
aquatic
productivity
(i.e.,
eutrophication)
is
driver
CH4
emissions
from
lentic
waters.
Considering
that
will
increase
over
next
century
due
climate
change
growing
human
population,
concomitant
in
may
occur.
We
simulate
eutrophication
waters
under
scenarios
future
nutrient
loading
inland
show
enhanced
lakes
substantially
these
systems
(+30-90%)
century.
This
increased
emission
has
atmospheric
impact
1.7-2.6
Pg
C-CO2-eq
y-1,
which
equivalent
18-33%
annual
CO2
burning
fossil
fuels.
Thus,
it
not
only
limit
preserve
fragile
water
supplies,
but
also
avoid
acceleration
change.
Journal of Environmental Quality,
Journal Year:
2017,
Volume and Issue:
46(1), P. 123 - 132
Published: Jan. 1, 2017
Cumulative
daily
load
time
series
show
that
the
early
2000s
marked
a
step-change
increase
in
riverine
soluble
reactive
phosphorus
(SRP)
loads
entering
Western
Lake
Erie
Basin
from
three
major
tributaries:
Maumee,
Sandusky,
and
Raisin
Rivers.
These
elevated
SRP
have
been
sustained
over
last
12
yr.
Empirical
regression
models
were
used
to
estimate
contributions
(i)
increased
runoff
changing
weather
precipitation
patterns
(ii)
delivery
(the
combined
effects
of
source
availability
and/or
transport
efficiency
labile
[P]
fractions).
Approximately
65%
after
2002
was
attributable
delivery,
with
higher
volumes
accounting
for
remaining
35%.
Increased
occurred
concomitantly
declining
watershed
P
budgets.
However,
within
these
watersheds,
there
long-term,
largescale
changes
land
management:
reduced
tillage
minimize
erosion
particulate
loss,
tile
drainage
improve
field
operations
profitability.
practices
can
inadvertently
fractions
at
soil
surface
transmission
via
subsurface
drainage.
Our
findings
suggest
agricultural
practices,
including
some
conservation
designed
reduce
transport,
may
had
unintended,
cumulative,
converging
impacts
contributing
loads,
reaching
critical
threshold
around
2002.
Water Resources Research,
Journal Year:
2017,
Volume and Issue:
53(11), P. 9181 - 9205
Published: Oct. 16, 2017
Abstract
Thermal
regimes
are
fundamental
determinants
of
aquatic
ecosystems,
which
makes
description
and
prediction
temperatures
critical
during
a
period
rapid
global
change.
The
advent
inexpensive
temperature
sensors
dramatically
increased
monitoring
in
recent
decades,
although
most
is
done
by
individuals
for
agency‐specific
purposes,
collectively
these
efforts
constitute
massive
distributed
sensing
array
that
generates
an
untapped
wealth
data.
Using
the
framework
provided
National
Hydrography
Dataset,
we
organized
records
from
dozens
agencies
western
U.S.
to
create
NorWeST
database
hosts
>220,000,000
recordings
>22,700
stream
river
sites.
Spatial‐stream‐network
models
were
fit
subset
those
data
described
mean
August
water
(AugTw)
63,641
site‐years
develop
accurate
(
r
2
=
0.91;
RMSPE
1.10°C;
MAPE
0.72°C),
assess
covariate
effects,
make
predictions
at
1
km
intervals
summer
climate
scenarios.
AugTw
averaged
14.2°C
(SD
4.0°C)
baseline
1993–2011
343,000
perennial
streams
but
trend
reconstructions
also
indicated
warming
had
occurred
rate
0.17°C/decade
0.067°C/decade)
40
year
1976–2015.
Future
scenarios
suggest
continued
warming,
variation
will
occur
within
among
networks
due
differences
local
forcing
responsiveness.
available
online
user‐friendly
digital
formats
widely
used
coordinate
agencies,
new
research,
conservation
planning.
Proceedings of the National Academy of Sciences,
Journal Year:
2020,
Volume and Issue:
117(21), P. 11566 - 11572
Published: May 8, 2020
Significance
Due
to
different
rates
of
change
in
total
nitrogen
(TN)
and
phosphorus
(TP)
concentrations
lakes,
increases
TN/TP
mass
ratios
were
observed
many
China’s
freshwater
lakes
during
2008
2017.
This
growing
imbalance
has
important
implications
for
aquatic
ecology
that
remain
poorly
considered
understood.
Here,
we
show
changes
municipal
wastewater
treatment
are
a
major
driver
lake
ratios,
as
is
more
effectively
removed
than
from
wastewater.
Our
findings
highlight
the
need
efficient
reduction
addition
reduce
risk
phytoplankton
blooms
toxin
production
maintain
ecosystem
biodiversity
downstream
waterbodies.
Freshwater Biology,
Journal Year:
2021,
Volume and Issue:
66(9), P. 1846 - 1859
Published: July 19, 2021
Abstract
Freshwater
cyanobacterial
blooms
have
become
ubiquitous,
posing
major
threats
to
ecological
and
public
health.
Decades
of
research
focused
on
understanding
drivers
these
with
a
primary
focus
eutrophic
systems;
however,
also
occur
in
oligotrophic
systems,
but
received
far
less
attention,
resulting
gap
our
overall.
In
this
review,
we
explore
evidence
freshwater
systems
provide
explanations
for
those
occurrences.
We
show
that
through
their
unique
physiological
adaptations,
cyanobacteria
are
able
thrive
under
wide
range
environmental
conditions,
including
low‐nutrient
waterbodies.
contend
fully
understand
blooms,
thereby
mitigate
manage
them,
must
expand
inquiries
consider
along
the
trophic
gradient,
not
solely
thus
shifting
high‐nutrient
paradigm
trophic‐gradient
.
