Critical Reviews in Environmental Science and Technology,
Год журнала:
2011,
Номер
41(sup1), С. 382 - 394
Опубликована: Фев. 17, 2011
Three
hurricanes
(Frances
and
Jeanne
in
2004
Wilma
2005)
passed
over
Lake
Okeechobee
causing
a
number
of
changes
its
sediment
environment.
The
unconsolidated
atop
the
mud
sediments
central
region
lake
became
thicker
due
to
settling
deposition
resuspended
after
passed.
increased
layer
was
more
easily
resuspended,
resulted
sustained
higher
solids
nutrient
concentrations
lower
light
transparency
water
column
for
than
4
years
Hurricanes
Frances
disturbed
consolidated
depth
7–15
cm
from
surface
while
Hurricane
extended
disturbance
25
cm.
Concentrations
total
suspended
(TSS)
four
sixfold
hurricanes.
high
concentration
TSS
continuous
maintained
2–4
times
normal
situation
until
present.
contributed
decrease
submerged
aquatic
vegetation
(SAV)
density
4–34
g
dw/m2
0.1–4
primarily
through
scouring.
SAV
recovery
very
slow
increasing
turbidity
reduced
transparency.
Freshwater Biology,
Год журнала:
2018,
Номер
63(4), С. 366 - 379
Опубликована: Фев. 8, 2018
Abstract
We
quantified
recovery
of
plankton
in
a
large
subtropical
shallow
lake
from
the
catastrophic
impacts
three
successive
major
hurricanes.
This
assessment
was
possible
because
hurricanes
passed
directly
over
amid
an
ongoing
long‐term
sampling
programme
that
included
nearly
all
components
plankton,
bacteria
to
crustacean
zooplankton.
compared
attributes
5
years
after
pre‐hurricane
period
and
immediately
storms.
evaluated
both
community‐level
properties
(biomass,
biomass
ratios,
diversity,
dominance
groups)
species‐level
(species
absolute
relative
biomass)
at
four
sites
representing
different
ecological
zones.
The
strongly
affected
water
quality
community
structure.
experienced
regime
shift,
losing
its
submerged
aquatic
vegetation
becoming
homogenous
turbid
sampled
sites.
Five
storms,
chemical
physical
conditions
recovered
across
lake,
with
few
exceptions.
Between
35
93
species
were
lost
sites,
greatest
losses
phytoplankton.
Relative
displayed
substantive
changes
too.
Daphnia
ambigua
did
not
recover
Polyarthra
vulgaris
greatly
increased
lake‐wide,
central
pelagic
site,
there
total
loss
heterotrophic
nano‐flagellates
much
higher
diatoms
than
before
hurricanes,
despite
irradiance,
depth,
nutrient
levels
other
attributes.
Most
resilient,
returning
biomass,
ratios
autotrophs
heterotrophs
protozoa
metazoa.
likely
happened
compensation
biodiverse
community.
exception
where
50
per
cent
lost.
resilience,
may
have
occurred
controlled
lowering
for
flood
protection,
which
led
regrowth
(
SAV
)
migration
mud
sediments
back
towards
mid‐lake.
In
this
others
history
high
inputs,
depth
flocculent
sediments,
resilience
be
low
unless
counter‐acting
forces
are
able
push
system
shift.
Critical Reviews in Environmental Science and Technology,
Год журнала:
2011,
Номер
41(sup1), С. 382 - 394
Опубликована: Фев. 17, 2011
Three
hurricanes
(Frances
and
Jeanne
in
2004
Wilma
2005)
passed
over
Lake
Okeechobee
causing
a
number
of
changes
its
sediment
environment.
The
unconsolidated
atop
the
mud
sediments
central
region
lake
became
thicker
due
to
settling
deposition
resuspended
after
passed.
increased
layer
was
more
easily
resuspended,
resulted
sustained
higher
solids
nutrient
concentrations
lower
light
transparency
water
column
for
than
4
years
Hurricanes
Frances
disturbed
consolidated
depth
7–15
cm
from
surface
while
Hurricane
extended
disturbance
25
cm.
Concentrations
total
suspended
(TSS)
four
sixfold
hurricanes.
high
concentration
TSS
continuous
maintained
2–4
times
normal
situation
until
present.
contributed
decrease
submerged
aquatic
vegetation
(SAV)
density
4–34
g
dw/m2
0.1–4
primarily
through
scouring.
SAV
recovery
very
slow
increasing
turbidity
reduced
transparency.
