Dual C and Cl compound-specific isotope analysis and metagenomic insights into the degradation of the pesticide methoxychlor
Journal of Hazardous Materials,
Год журнала:
2024,
Номер
480, С. 135929 - 135929
Опубликована: Сен. 20, 2024
Язык: Английский
Analysis of Habitat Quality and Potential Spawning Locations of Mangrove Crabs (Scylla spp.) in the Eastern Coastal Region of Aceh
IOP Conference Series Earth and Environmental Science,
Год журнала:
2025,
Номер
1477(1), С. 012024 - 012024
Опубликована: Апрель 1, 2025
Abstract
The
mangrove
crab
(Scylla
spp.)
is
an
important
commodity
for
both
the
ecosystem
and
coastal
community’s
economy.
This
study
aims
to
analyze
habitat
quality
potential
spawning
locations
of
crabs
on
eastern
coast
Aceh.
was
conducted
by
measuring
various
environmental
parameters
that
influence
crabs.
physical
measured
include
water
temperature,
depth,
currents,
substrate
structure.
Other
salinity,
pH,
dissolved
oxygen
(DO)
content,
biological
such
as
vegetation
density,
species
diversity,
plankton
population,
presence
natural
predators.
method
used
in
this
research
exploratory,
with
a
quantitative
approach
purposive
sampling
technique.
Data
collection
carried
out
determining
three
observation
points
at
each
location,
plot
covering
area
10x10
m
2
.
field
samples
were
then
analyzed
laboratory.
results
showed
Aceh
has
good
growth
crabs,
indicated
optimal
conditions
high
biodiversity.
found
pH
ranges
from
6-7,
temperature
19°C-20°C,
salinity
22-23
ppm,
current
speed
location
1-3
m,
clarity
18
-19
cm,
8-9
km/h,
6-7
ppm.
also
identified
several
challenges
need
be
addressed,
excessive
fishing
activities
lack
community
participation
conservation.
Based
study’s
findings,
sustainable
management
efforts
are
recommended,
including
increasing
awareness
participation,
well
implementing
better
resource
policies.
Язык: Английский
Deciphering environmental forcings in the distribution of meiofauna and nematodes in mangroves of the Atlantic-Caribbean-East Pacific and Indo-West Pacific regions
The Science of The Total Environment,
Год журнала:
2024,
Номер
930, С. 172612 - 172612
Опубликована: Апрель 23, 2024
Mangroves
develop
under
environmental
conditions
and
anthropogenic
pressures
whose
impact
on
benthic
meiofauna
remains
poorly
understood.
It
is
unclear
how
communities
are
structured
according
to
local
sedimentary
conditions.
This
study
was
designed
characterize
the
community
structure
of
nematodes
(dominant
taxa)
associated
forcings
in
intertidal
mangrove
sediments
from
Mayotte
(Indo-West-Pacific),
Martinique
Guadeloupe
(Caribbean).
Sediment
cores
were
sampled
at
end
dry
season
low
tide
adult
stands
with
similar
immersion
time.
In
each
sediment
layer,
we
analyzed
redox
potential,
pH,
porewater
salinity,
grain
size,
organic
matter,
metals,
contaminants,
prokaryotes
meiofauna.
Our
results
show
that
far
cities
agricultural
fields
trapped
site-specific
contaminants
due
water
transport
processes.
Some
PAHs
or
pesticides
exceeded
toxicity
thresholds
most
studied
stations,
thus
being
harmful
fauna.
The
environment
acts
as
a
filter
selecting
specific
station
scale
only
Caribbean.
Mayotte,
horizontal
homogeneity
contrasts
vertical
heterogeneity
Nematode
genera
showed
particular
distribution
patterns
horizontally
vertically,
suggesting
presence
patches
suitable
for
restricted
pool
island.
Results
Caribbean
consistent
nested
diversity
filtering.
Conversely,
would
reflect
greater
dispersal
between
stations
more
spatially
homogeneous
pressures.
nematode
present
depth
may
not
be
specialized,
but
versatile,
capable
thriving
different
Terschellingia
Daptonema
contrasted
responses
forcing,
likely
their
versatility,
while
Desmodora
uniform
areas,
except
when
exceeded.
emphasize
given
genus
respond
differently
depending
sites.
Язык: Английский
Global Biogeography of Prokaryotes in Mangrove Sediments: Spatial Patterns and Ecological Insights from 16S rDNA Metabarcoding
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 20, 2024
Abstract
The
global
asymmetry
in
the
floristic
diversity
distribution
within
mangrove
ecosystems
is
well-documented.
However,
sediment
microbial
communities,
which
play
crucial
ecological
roles,
are
often
overlooked
biogeography
studies.
This
study
aimed
to
investigate
diversity,
composition,
and
of
prokaryotic
communities
across
distinct
bioregions
(12
countries
territories
from
Caribbean
bioregion,
Southeast
America,
East
Africa,
Indo-Malaysia
Australasia).
We
conducted
a
meta-analysis
by
compiling
16S
rDNA
datasets
17
previous
studies
(540
samples)
over
six
year
period
(2014-2020)
applied
community
ecology
analyses
combined
with
random
forest
models.
Although
no
significant
correlation
was
observed
between
tree
richness
hotspot
identified
Indo-West
Pacific
region.
Microbiota
associated
different
mangroves
displayed
opposite
latitudinal
gradients
beta-dispersions.
Distance-decay
relationships
were
weak
but
statistically
significant.
Random
models
key
taxa,
OTUs
shared
all
suggested
presence
potential
core
microbiota.
Taxonomic
statistical
underscored
great
heterogeneity
microbiota
heavily
influenced
(e.g.,
molecular
bioinformatic
methodologies).
Future
research
on
microbiome
would
benefit
standardized
sampling
sequencing
methods.
Despite
current
limitations,
distance-decay
relationship
confirmed
influence
dispersal
barriers
for
also
suggests
that
environmental
factors,
rather
than
plant
alone,
may
prominent
role
shaping
composition
sediments.
Язык: Английский