Earth system science data,
Год журнала:
2024,
Номер
16(11), С. 5333 - 5356
Опубликована: Ноя. 21, 2024
Abstract.
The
ATL2MED
demonstration
experiment
involved
two
autonomous
surface
vehicles
from
Saildrone
Inc.
(SD)
which
travelled
a
route
the
eastern
tropical
North
Atlantic
to
Adriatic
Sea
between
October
2019
and
July
2020
(see
Table
A6).
This
9-month
in
transition
zone
temperate
belts
represents
major
challenge
for
SD's
operations.
sensors
on
board
were
exposed
varying
degrees
of
degradation
biofouling
depending
geographical
area
season,
led
deterioration
measurements.
As
result,
some
maintenance
measures
required
during
mission.
We
address
difficulty
correcting
data
period
COVID-19
restrictions,
significantly
reduced
number
discrete
samples
planned
SD
salinity
dissolved
oxygen
validation.
article
details
alternative
correction
methods
oxygen.
Due
lack
situ
data,
model
products
have
been
used
correct
acquired
by
instruments,
then
resulting
corrected
was
validated
with
fixed
ocean
stations,
gliders,
Argo
floats.
In
addition,
instruments
after
using
air
measurements
tested
found
be
coherent
variation
concentrations
expected
changes
temperature
phytoplankton
abundance
(from
chlorophyll
a).
are
relevant
useful
situations
where
validation
capabilities
lacking,
case
experiment.
For
future
experiments,
more
frequent
sample
collection
would
improve
qualification
Scientific Reports,
Год журнала:
2023,
Номер
13(1)
Опубликована: Ноя. 17, 2023
Environmental
DNA
metabarcoding
is
increasingly
implemented
in
biodiversity
monitoring,
including
phytoplankton
studies.
Using
21
mock
communities
composed
of
seven
unicellular
diatom
and
dinoflagellate
algae,
assembled
with
different
composition
abundance
by
controlling
the
number
cells,
we
tested
accuracy
an
eDNA
protocol
reconstructing
patterns
alpha
beta
diversity.
This
approach
allowed
us
to
directly
evaluate
both
qualitative
quantitative
estimates.
Our
results
showed
non-negligible
rates
(17-25%)
false
negatives
(i.e.,
failure
detect
a
taxon
community
where
it
was
included),
for
three
taxa.
led
statistically
significant
underestimation
metabarcoding-derived
diversity
(Wilcoxon
p
=
0.02),
detected
species
richness
being
lower
than
expected
(based
on
cell
numbers)
8/21
communities.
Considering
diversity,
correlation
between
dissimilarities
but
not
strong
(R2
0.41),
indicating
suboptimal
results.
Average
biovolume
rDNA
gene
copy
were
estimated
taxa,
highlighting
potential,
though
exhaustive,
role
latter
explaining
recorded
biases.
findings
highlight
importance
assessing
reliability
studies
identifying
their
limitations.
Environments,
Год журнала:
2024,
Номер
11(1), С. 22 - 22
Опубликована: Янв. 20, 2024
The
evaluation
of
the
hydrography
and
biogeochemistry
Adriatic
Sea
over
last
century
was
summarized
in
this
review
to
point
out
any
changes
river
runoff
provide
an
overview
cause
effect
these
trends
on
marine
ecosystems.
Although
several
rivers
flow
into
Adriatic,
most
affected
area
is
northern
where
Po
River
loads
basin
half
total
freshwater
input,
carrying
causing
algal
blooms
hypoxia
phenomena.
These
fresh
waters
predominantly
along
entire
western
side,
reaching
southernmost
part
up
Mediterranean
Sea.
Here,
whole
basin,
variations
nutrient
concentration
have
been
observed
through
years.
Starting
from
1960
until
end
century,
increase
discharge
phytoplankton
activity
reported,
with
negative
repercussions
local
fisheries,
species
richness,
recreational
activities
within
basin.
However,
a
recent
decrease
inflow
has
coastal
belt,
which
can
trigger
consequences
for
food
web
ecosystem.
trends,
more
broadly,
corroborate
vulnerability
stress
importance
implementing
strategies
defense
relevant
ecosystems
its
confines.
Applied Sciences,
Год журнала:
2023,
Номер
13(16), С. 9267 - 9267
Опубликована: Авг. 15, 2023
In
the
last
two
decades
of
21st
century,
a
gradual
decrease
in
nitrogen
and
phosphorus
has
been
observed
along
coastal
area
Northern
Adriatic
Sea.
This
depletion
is
attributed
to
reduced
river
flows.
Studies
conducted
over
past
four
have
indicated
that
N/P
ratio
open
sea
unlikely
undergo
significant
change.
fact,
it
tends
increase
due
unique
characteristics
Sea,
which
experiences
slow
water
turnover
influenced
by
strong
winds.
Additionally,
Sea
receives
substantial
amount
freshwater
from
rivers,
accounting
for
about
one-third
total
flow
into
Mediterranean.
These
rivers
carry
nutrient
loads
contribute
high
productivity
abundance
fish
this
sea,
making
one
most
productive
areas
It
cessation
anthropogenic
input,
regulated
since
late
1980s
with
legislation
limiting
its
use
detergents,
significantly
affected
trophic
chain.
The
aim
review
provide
an
overview
eutrophication
trend
highlighting
importance
long-term
data
series.
Biology,
Год журнала:
2024,
Номер
13(7), С. 493 - 493
Опубликована: Июль 2, 2024
Considering
the
role
of
phytoplankton
in
functioning
and
health
marine
systems,
it
is
important
to
characterize
its
responses
a
changing
environment.
The
central
Adriatic
Sea,
as
generally
oligotrophic
area,
suitable
environment
distinguish
between
regular
fluctuations
those
caused
by
anthropogenic
or
climatic
influences.
This
study
provides
long-term
perspective
assemblage
eastern
with
14
years
continuous
time
series
data
collected
at
two
coastal
offshore
stations.
predominant
groups
were
diatoms
phytoflagellates,
but
their
proportion
varied
depending
on
vicinity
coast,
evidenced
also
distribution
chlorophyll
Frontiers in Marine Science,
Год журнала:
2024,
Номер
11
Опубликована: Сен. 2, 2024
Marine
sediments
host
heterogeneous
protist
communities
consisting
of
both
living
benthic
microorganisms
and
planktonic
resting
stages.
Despite
their
key
functions
in
marine
ecosystem
processes
biogeochemical
cycles,
structure
dynamics
are
largely
unknown.
In
the
present
study,
with
a
spatially
intensive
sampling
design
we
investigated
diversity
function
surface
sediment
samples
from
three
subregions
Mediterranean
Sea,
through
an
environmental
DNA
metabarcoding
approach
targeting
18S
V4
region
rRNA
gene.
Protists
were
characterized
at
taxonomic
level
trophic
function,
terms
alpha
community
composition,
testing
for
potential
differences
among
bathymetric
groups.
Overall,
Alveolata
Stramenopiles
two
divisions
that
dominated
communities.
These
dominant
groups
exhibited
significant
estimates
based
on
detected
ASVs,
all
computed
indices
(ASV
richness,
Shannon
Simpson
indices).
Protist
also
found
to
be
significantly
different
composition
order
rank
p-value
<
0.01).
mainly
driven
by
Anoecales,
Peridiniales,
Borokales,
Paraliales
Gonyaulacales,
which
together
contributed
almost
80%
average
dissimilarity.
Anoecales
was
Ionian
–
Central
Adriatic
but
considerably
relative
abundances
(52%
36%,
respectively),
while
Borokales
Western
Sea
(33%).
Similarly,
highlighted
when
assemblages
examined
(calculated
ASVs
each
group)
0.01.
particular,
stood
out
having
highest
abundance
autotrophic/mixotrophic
components
analyzed.
Conversely,
no
depth
This
study
provided
new
insights
into
sediments,
revealing
geographical
regional
seas.
The
results
discussed
relation
features
could
generate
Frontiers in Ecology and Evolution,
Год журнала:
2025,
Номер
13
Опубликована: Март 3, 2025
The
Northern
Adriatic
is
a
dynamic
and
the
most
productive
part
of
Sea.
phytoplankton
is,
as
many
studies
in
this
area
showed,
under
heavy
influence
freshwater
inputs
anthropogenic
pressures.
Cluster
analysis
more
than
20
year
data
set
across
steep
spatio-temporal,
ecological
gradients
on
longitudinal
transect
northern
Adriatic,
allowed
us
to
identify
significant
reoccurring
species
assemblages.
Those
clusters
show
stable
seasonality
relation
environmental
conditions
are
presumed
be
cornerstones
important
ecosystem
services
provided
by
phytoplankton.
Our
results
demonstrate
that
disrupted,
leading
destabilisation
seasonal
patterns
biodiversity
primary
producers.
During
last
years,
characterised
dominating
were
replaced
coexistence
several
species.
Overall
frequency
dense
blooms
single
appears
decline.
Multivariate
showed
possible
reasons
might
lie
oligotrophication
increased
salinity
dynamics.
suggest
importance
applicability
cluster
taxon
based
long
term
sets
elucidate
functional
changes.
