Stable isotope analyses of lacustrine chitinous invertebrate remains: Analytical advances, challenges and potential
Quaternary Science Reviews,
Journal Year:
2024,
Volume and Issue:
346, P. 109067 - 109067
Published: Nov. 16, 2024
Language: Английский
Isotopic variability of the invasive blue crab Callinectes sapidus in the Gulf of Cadiz: Impacts and implications for coastal ecosystem management
Journal of Environmental Management,
Journal Year:
2025,
Volume and Issue:
374, P. 124015 - 124015
Published: Jan. 10, 2025
The
variability
in
trophic
position
and
carbon
isotopic
signatures
can
provide
information
about
their
dietary
flexibility
its
ability
to
adapt
changing
environmental
conditions.
impact
of
the
invasive
blue
crab
Callinectes
sapidus
was
assessed
by
estimating
niche
using
stable
isotopes
(δ
Language: Английский
Limited Shifts in Sulfur Stable Isotopes in Response to Hypoxia Exposure of Atlantic Croaker, Micropogonias undulatus
Estuaries and Coasts,
Journal Year:
2025,
Volume and Issue:
48(3)
Published: Feb. 21, 2025
Language: Английский
δ13C, δ15N, and δ34S isotope values from preserved elasmobranch jaws: implications for ecological studies from existing collections
Marine Environmental Research,
Journal Year:
2025,
Volume and Issue:
207, P. 107063 - 107063
Published: March 5, 2025
Stable
isotope
analysis
has
become
a
widely
used
biogeochemical
tool
owing
to
its
capacity
reveal
predator
foraging
habitats,
trophic
level,
and
prey
preferences.
The
breadth
of
applicable
tissue
types
is
quickly
growing
across
taxa,
including
for
elasmobranchs,
with
tooth
isotopes
gaining
traction
trace
within-individual
variation
in
ecology.
Jaws
museums
private
collections
present
unique
opportunity
access
samples
from
rare
or
protected
species
size
classes.
However,
most
these
jaws
are
chemically
treated
prevent
degradation
whiten
teeth
cartilage
aesthetic
long-term
display.
Prior
using
stable
jaws,
we
need
understand
the
impacts
chemical
treatments
on
carbon,
nitrogen,
sulphur
isotopes.
We
compared
preparation
process
(acid
digestion)
δ15N,
δ13C,
δ34S
values
dried
preserved
ethanol,
bleach,
hydrogen
peroxide.
investigated
effects
preservation
methods
three
elasmobranch
distinct
morphologies:
cownose
rays
(Rhinoptera
bonasus)
plates,
gummy
sharks
(Mustelus
antarcticus)
small
plate-like
teeth,
broadnose
sevengill
(Notorynchus
cepedianus)
larger
serrated
teeth.
Preservation
had
no
impact
digestibility
all
dentition
types.
These
findings
support
use
display
ecological
studies
Language: Английский
Discrimination Factor of Sulphur Stable Isotope Ratios Between Pregnant Fin Whales and Their Foetuses
Marc Ruiz‐Sagalés,
No information about this author
Asunción Borrell,
No information about this author
Àlex Aguilar
No information about this author
et al.
Rapid Communications in Mass Spectrometry,
Journal Year:
2025,
Volume and Issue:
39(14)
Published: April 28, 2025
Abstract
Rationale
In‐utero
synthesised
tissues
of
mammals
have
often
been
used
to
infer
maternal
behaviour
during
gestation.
Differences
in
δ
15
N
or
13
C
values
between
foetal
and
(foetus–mother
discrimination
factors)
are
well
established,
but
they
remain
uncertain
for
34
S
values.
This
study
addresses
this
gap
by
investigating
such
fin
whale
muscle
(
Balaenoptera
physalus
)
its
potential
variation
throughout
Methods
We
analysed
11
pregnant
whales
their
respective
foetuses.
Samples
were
obtained
from
individuals
feeding
off
northwestern
(NW)
Spain
the
1983–1985
summer
seasons.
Yearday
(0–365)
length
at
moment
sampling
considered
proxies
gestation
stage
effect
on
factors
was
examined.
The
determined
continuous
flow
isotope
ratio
mass
spectrometry.
Results
positively
correlated.
higher
(M
±
SD
=
19.2
0.3
‰)
compared
one
18.6
0.4
‰),
with
a
foetus–mother
Δ
0.59
0.15
‰.
observed
enrichment
may
be
due
differences
isotopic
turnover
rates,
amino
acid
metabolism,
and/or
dietary
patterns
did
not
change
yearday
foetus
length.
Conclusions
These
findings
relevant
understanding
foetal‐maternal
drawing
ecological
inferences
tissues.
Further
research
is
needed
understand
mechanisms
driving
fractionation
under
different
scenarios.
Language: Английский
Effects of wetland foraging and body size on bison hair sulfur, nitrogen, and carbon isotope compositions: Implications for wildlife conservation, archaeology, and palaeoecology
Palaeogeography Palaeoclimatology Palaeoecology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 113033 - 113033
Published: May 1, 2025
Language: Английский
Inter‐ and intraspecific variation in the degree of marine‐derived resources of amphidromous fishes
Ryosuke Tanaka,
No information about this author
Taiga Kunishima,
No information about this author
Kentarou Hirashima
No information about this author
et al.
Journal of Fish Biology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 21, 2025
Abstract
Migratory
animals
often
transport
allochthonous
materials,
energy
or
organisms
from
donor
to
recipient
ecosystems,
thereby
affecting
the
dynamics
of
consumers,
communities
and
ecosystems
in
systems.
The
biomass
migrants
is
commonly
assumed
be
equal
that
materials
they
transport,
with
inherent
assumption
migrant
bodies
are
produced
purely
resources.
However,
extent
which
body
composition
many
migratory
consists
[e.g.,
proportion
total
mass
consisting
resources,
hereafter
degree
allochthony
(DOA)]
may
gradually
decrease
if
consume
autochthonous
resources
during
their
migration.
Ignoring
this
process
leads
an
overestimation
magnitude
temporal
features
material
subsidies.
In
study,
we
quantified
DOA
nine
amphidromous
fish
species
migrate
marine
rivers,
using
sulphur
stable
isotope
(
δ
34
S)
analysis.
varied
substantially
among
(11%–82%)
even
within
Sicyopterus
japonicus
had
highest
DOA:
22%–97%).
Species
larger
sizes
tended
exhibit
a
lower
DOA.
This
trend
was
also
observed
at
level
for
six
species,
five
showing
additional
pattern
later
migrating
individuals
These
results
imply
quantifying
important
accurately
estimating
subsidies
across
owing
upstream
migration
fish.
Life‐history
studies
fishes
crucial
elucidating
mechanisms
behind
inter‐
intraspecific
variation
DOA,
ultimately
contributes
better
understanding
marine‐river
ecosystem
linkages
mediated
by
these
fishes.
Language: Английский
What it means to be marine: Sulfur isotope variability in the historical Chesapeake Bay ecosystem
Eric Guiry,
No information about this author
J. Ryan Kenedy,
No information about this author
Leah Stricker
No information about this author
et al.
Journal of Archaeological Science,
Journal Year:
2025,
Volume and Issue:
179, P. 106265 - 106265
Published: May 21, 2025
Language: Английский
Using stable-isotope analysis to assess recent diet and habitat use of stranded green turtles (Chelonia mydas)
Wildlife Research,
Journal Year:
2024,
Volume and Issue:
51(12)
Published: Dec. 8, 2024
Context
Gaining
a
better
understanding
of
the
foraging
ecology
green
turtles
(Chelonia
mydas)
in
different
regions
can
improve
effectiveness
conservation
and
management
strategies
for
this
species.
New
South
Wales
(NSW),
eastern
Australia,
has
been
identified
as
region
requiring
improved
information
on
habitat
use
by
turtles.
Aims
The
aim
study
was
to
stable-isotope
analyses
investigate
diet
composition
found
stranded
along
NSW
coastline
from
2018
2021.
Methods
This
measured
δ13C,
δ15N,
δ34S
macrophyte
(mangrove,
seagrass,
algae)
samples
collected
coastline,
between
March
June
2021,
epidermis
tissue
that
same
In
addition,
values
animals
known,
or
expected,
be
consumed
were
sourced
literature.
Macrophyte
mapped
display
spatial
variations,
then
combined
with
literature-sourced
animal
matter
isotope
into
mixing
models.
Mixing
models
used
determine
structure
each
turtle,
their
similarity
regional
infer
potential
locations.
Key
results
High
variation
present
sources
limiting
recent
locations
δ15N
turtle
indicated
most
sampled
feeding
two
three
trophic
levels
above
primary
producers
within
algal-based
food
webs.
suggested
these
webs
predominantly
supported
algae
(mean
±
s.
d.
=
51.2
6.1%)
material
(31.4
4.7%),
mangrove
(13.4
2.0%)
seagrass
(4.0
2.5%)
representing
much
smaller
proportions
overall
composition.
Conclusions
showed
feed
primarily
algae-dominated
webs,
evidence
omnivory.
These
findings
suggest
individuals
compositions
alternative
those
Queensland
counterparts,
who
seagrass-dominated
habitats.
Management
programs
should
focus
anthropogenic
disturbances
Implications
novel
finding
demonstrated
importance
habitats
south-eastern
Australia.
generated
isoscapes
are
useful
examining
isotopic
variations
macrophytes
coastline.
Language: Английский
Scaling of bite force corresponds with ontogenetic niche shifts in coastal elasmobranchs
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: Nov. 28, 2024
Introduction
Predators,
such
as
sharks,
play
important
ecological
roles
in
coastal
ecosystems
when
abundant
and
these
change
over
ontogeny.
However,
shifts
role
are
often
not
evaluated
light
of
feeding
performance.
Bite
force
is
an
ecologically
relevant
metric
performance
that
has
been
associated
with
a
species’
foraging
niche,
which
may
serve
key
factor
constrains
prey
selection
both
within
among
sympatric
species.
Methods
This
study
applies
interdisciplinary
approach
to
discern
the
ecomechanical
relationships
bull
(
Carcharhinus
leucas
),
blacktip
limbatus
bonnethead
sharks
Sphyrna
tiburo
)
using
biomechanics
bulk
stable
isotopes
(δ
13
C,
δ
15
N).
We
sought
(1)
estimate
theoretical
bite
scaling
patterns
ontogeny
each
species,
(2)
quantify
niche
breadth
overlap
(3)
characterize
relationship
between
changes
Results
Importantly,
we
found
smaller
conspecifics
exhibited
positive
allometric
force,
whereas
larger
isometric
scaling.
Associations
ontogenetic
habitat
diet
were
but
sharks.
Additionally,
isotopic
was
greatest
generalist
followed
by
specialist
Discussion
These
findings
highlight
animal
measures
critical
drivers
ofecological
Size-based
differences
should
be
considered
evaluating
other
taxa,
determinant
dietary
shifts.
Language: Английский