bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Dec. 7, 2023
Abstract
The
3-D
structure
and
organization
of
type-1
collagen
protein
vasculature
for
a
set
ancient
permafrost
bones
is
extensively
documented
at
the
nanoscale
(up
to
150,000×
magnification)
first
time.
chemical
mapping
technique
ToF-SIMS
additionally
used
directly
localize
signal
these
structures;
C:N
isotope
measurements
are
also
reported
bulk
organic
bone
matrix.
These
analyses
test
hypothesis
that
biomolecular
histology
from
supports
their
taphonomic
classification
as
“subfossils”
rather
than
“fossils”.
Results
indicate
original
collagenous
scaffolding
still
present,
former
which
well-preserved,
thus
supporting
hypothesis.
This
study
taphonomically
classify
pre-Holocene
based
on
preserved
state
histology.
methods
can
be
readily
expanded
specimens
warmer
thermal
settings
earlier
geologic
strata.
Doing
so
has
potential
establish/formalize
what
point
been
truly
“fossilized”;
is,
when
it
transitioned
“subfossil”
status
being
true
“fossil”
bone.
will
elucidate
fossilization
process
vertebrates
lead
deeper
understanding
means
“fossil”.
mSystems,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 8, 2025
ABSTRACT
Climate
change
is
inducing
wide-scale
permafrost
thaw
in
the
Arctic
and
subarctic,
triggering
concerns
that
long-dormant
pathogens
could
reemerge
from
thawing
ground
initiate
epidemics
or
pandemics.
Viruses,
as
opposed
to
bacterial
pathogens,
garner
particular
interest
because
outbreaks
cannot
be
controlled
with
antibiotics,
though
effects
can
mitigated
by
vaccines
newer
antiviral
drugs.
To
evaluate
potential
hazards
posed
viral
emerging
permafrost,
we
review
information
a
diverse
range
of
disciplines.
This
includes
efforts
recover
infectious
virus
human
remains,
studies
on
disease
occurrence
polar
animal
populations,
investigations
into
persistence
infectivity
assessments
exposure
enormous
diversity
present
environment.
Based
currently
available
knowledge,
conclude
risk
viruses
no
greater
than
other
environments
such
temperate
soils
aquatic
systems.
Trends in Genetics,
Journal Year:
2024,
Volume and Issue:
40(5), P. 398 - 409
Published: Feb. 28, 2024
Abundant
and
plentiful
fruit
crops
are
threatened
by
the
loss
of
diverse
legacy
cultivars
which
being
replaced
a
limited
set
high-yielding
ones.
This
article
delves
into
potential
paleogenomics
that
utilizes
ancient
DNA
analysis
to
revive
lost
diversity.
By
focusing
on
grapevines,
date
palms,
tomatoes,
recent
studies
showcase
effectiveness
paleogenomic
techniques
in
identifying
understanding
genetic
traits
crucial
for
crop
resilience,
disease
resistance,
nutritional
value.
The
approach
not
only
tracks
landrace
dispersal
introgression
but
also
sheds
light
domestication
events.
In
face
major
future
environmental
challenges,
integrating
with
modern
breeding
strategies
emerges
as
promising
avenue
significantly
bolster
sustainability.
Molecular Ecology Resources,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 20, 2025
ABSTRACT
The
condition
of
ancient
marine
ecosystems
provides
context
for
contemporary
biodiversity
changes
in
human‐impacted
oceans.
Sequencing
sedimentary
DNA
(sedaDNA)
is
an
emerging
method
generating
high‐resolution
time‐series
data,
offering
insights
into
past
ecosystems.
However,
few
studies
directly
compare
the
two
predominant
sedaDNA
sequencing
approaches:
metabarcoding
and
shotgun‐metagenomics,
it
remains
unclear
if
these
methodological
differences
affect
diversity
metrics.
We
compared
methods
using
from
archived
sediment
record
sampled
Skagerrak,
North
Sea,
spanning
almost
8000
years.
performed
a
eukaryotic
18S
rRNA
region
(V9)
sequenced
153–229
million
metagenomic
reads
per
sample.
Our
results
show
limited
overlap
between
metagenomics,
with
only
three
metazoan
genera
detected
by
both
methods.
For
overlapping
taxa,
detections
became
inconsistent
samples
older
than
2000
years,
while
metagenomics
taxa
throughout
time
series.
observed
divergent
patterns
alpha
diversity,
indicating
decreased
richness
towards
present
showing
increase.
beta
were
similar
methods,
discrepancies
data
comparisons.
findings
demonstrate
that
choice
significantly
impacts
record.
While
we
stress
variation
degradation
among
may
not
be
strongly
affected,
researchers
should
exonerate
explanations
cores,
particularly
when
considering
before
making
ecological
interpretations.
Paleobiology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 21
Published: March 11, 2025
Abstract
The
spatial
distribution
of
individuals
within
ecological
assemblages
and
their
associated
traits
behaviors
are
key
determinants
ecosystem
structure
function.
Consequently,
determining
the
species,
how
distributions
influence
patterns
species
richness
across
ecosystems
today
in
past,
helps
us
understand
what
factors
act
as
fundamental
controls
on
biodiversity.
Here,
we
explore
niche
modeling
has
contributed
to
understanding
spatiotemporal
past
biodiversity
evolutionary
processes.
We
first
perform
a
semiquantitative
literature
review
capture
studies
that
applied
models
(ENMs)
identifying
668
studies.
coded
each
study
according
focal
taxonomic
group,
whether
used
fossil
evidence,
it
relied
evidence
or
methods
addition
ENMs,
scale
study,
temporal
intervals
included
ENMs.
trends
publication
categories
anchor
discussion
recent
technical
advances
modeling,
focusing
paleobiogeographic
ENM
applications.
then
explored
contributions
ENMs
paleobiogeography,
with
particular
focus
examining
drivers
range
dynamics;
phylogeography
within-lineage
macroevolutionary
processes,
including
change,
speciation,
extinction;
community
assembly;
conservation
paleobiogeography.
Overall,
powerful
tools
for
elucidating
patterns.
most
commonly
Quaternary
dynamics,
but
an
increasing
number
use
gain
important
insight
into
both
processes
pre-Quaternary
times.
Deeper
integration
phylogenies
may
further
extend
those
insights.
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Feb. 4, 2025
Abstract
After
centuries
of
decline
and
protracted
bottlenecks,
the
peninsular
Italian
wolf
population
has
naturally
recovered.
However,
an
exhaustive
comprehension
effects
such
a
conservation
success
is
still
limited
by
reduced
availability
historical
data.
Therefore,
in
this
study,
we
morphologically
genetically
analyzed
contemporary
samples,
also
exploiting
optimization
innovative
bone
DNA
extraction
method,
to
describe
morphological
variability
subspecies
its
genetic
diversity
during
last
30
years.
We
obtained
high
amplification
genotyping
rates
for
tissue,
blood
petrous
samples.
Multivariate,
clustering
analyses
confirmed
that
Apennine
well-distinguishable
from
both
European
wolves
dogs,
with
no
natural
immigration
other
populations,
while
remained
low
across
three
decades,
without
significant
changes
between
specimens.
This
study
highlights
scientific
value
well-maintained
museum
collections,
demonstrates
bones
represent
reliable
sources,
emphasizes
need
long-term
monitor
dynamics
peculiar
populations
ensure
appropriate
management
actions.
Molecular Ecology Resources,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 6, 2025
ABSTRACT
Large‐scale
DNA
screening
of
palaeontological
and
archaeological
collections
remains
a
limiting
costly
factor
for
ancient
studies.
Several
extraction
protocols
are
routinely
used
in
laboratories
have
even
been
automated
on
robotic
platforms.
Robots
offer
solution
high‐throughput
but
the
costs,
as
well
necessity
trained
technicians
engineers,
can
be
prohibitive
some
laboratories.
Here,
we
present
alternative
to
robot‐based
using
96‐column
plate.
When
compared
routine
single
MinElute
columns,
retrieved
highly
similar
endogenous
contents,
an
important
metric
screening.
Mitogenomes
with
coverage
depth
greater
than
0.1×
could
generated
allowed
taxonomic
assignment.
However,
average
fragment
lengths,
damage
library
complexities
significantly
differed
between
methods
these
differences
became
nonsignificant
after
modification
our
purification
protocol.
Our
method
allows
generation
96
extracts
within
approximately
4
hours
laboratory
work
while
bringing
cost
down
by
~39%
columns.
Additionally,
formally
demonstrate
that
addition
Tween‐20
during
elution
step
results
higher
complexity
libraries,
thereby
enabling
genome
same
sequencing
effort.