Seagrass mapping of north-eastern Brazil using Google Earth Engine and Sentinel-2 imagery
Environmental and Sustainability Indicators,
Journal Year:
2024,
Volume and Issue:
unknown, P. 100489 - 100489
Published: Sept. 1, 2024
Language: Английский
Seascape Habitat Mapping of North-Eastern Brazil Using Sentinel-2, with a Focus on Seagrass
Published: Jan. 1, 2024
Seagrass
ecosystems
are
globally
important
blue
carbon
sinks
which
support
significant
marine
and
terrestrial
biodiversity.
However,
human-induced
climate
change
coupled
with
other
anthropogenic
stressors
have
substantially
reduced
seagrass
distributions,
making
them
one
of
the
most
threatened
on
Earth.
The
challenges
associated
conservation
include
large
data
gaps
limited
low-cost,
near-real
time
methods
for
monitoring
their
distribution.
Particularly,
Brazilian
biota
is
severely
hindered
by
lack
regional
scale
mapping
data.
To
address
this
knowledge
gap,
we
used
507
Sentinel-2
satellite
images,
filtered
between
August
2020
May
2021,
in
Google
Earth
Engine
cloud
computing
environment
seascape
habitat
mapping.
We
mapped
five
states
along
north-east
coast
Brazil,
covering
approximately
9,452
km2
coastline
up
to
a
depth
10
metres.
recorded
328
coast,
providing
vital
open
access
positional
information
variety
research
applications.
also
tested
whether
can
be
map
temporal
changes
coastal
habitats
showed
decline
15.9%
meadows
over
5-year
period
areas
Brazil.
demonstrate
that
effective
distributions
at
emphasise
importance
replicable
systematic
race
conserve
globally.
Language: Английский
The longest documented travel by a West Indian manatee
Journal of the Marine Biological Association of the United Kingdom,
Journal Year:
2024,
Volume and Issue:
104
Published: Jan. 1, 2024
Abstract
In
Northeastern
Brazil,
successful
release
programmes
have
been
implemented
for
the
conservation
of
West
Indian
manatees
(
Trichechus
manatus
)
since
1990s.
Recently,
non-government
organization
AQUASIS
started
releasing
in
state
Ceará,
where
oceanographic
conditions
and
absence
sheltered
places
pose
new
challenges
monitoring
manatees.
This
research
investigates
movement
a
manatee
named
Tico,
released
Icapuí,
that
travelled
approximately
4017
km
over
62
days
through
deep
oceanic
waters.
Correlating
Tico's
trajectory
velocity
with
surface
currents
revealed
influence
North
Brazil
Current
(NBC)
its
vortices
on
his
movement.
Tico
crossed
diluted
Amazon
River
plume
salinity
as
low
26
g
kg
−1
early
August,
potentially
encountering
areas
even
lower
salinity.
Additionally,
experienced
several
storms,
significant
rainfall
during
journey,
which
may
provided
freshwater.
The
erratic
patterns
weight
loss
prompted
rescue
Isla
la
Blanquilla,
Bolivarian
Republic
Venezuela.
is
currently
being
temporarily
housed
Parque
Zoológico
y
Botánico
Bararida
Understanding
nature
long-distance
could
help
inform
decisions
about
future.
proposes
to
return
region
an
ecologically
genetically
distinct
population
from
Venezuela,
second
attempt,
incorporating
lessons
learned
first
release.
Furthermore,
has
necessary
human
financial
resources
ensure
continuous
readaptation
wild.
Language: Английский