Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 9, 2024
Tree
rings
are
an
emerging
atmospheric
mercury
(Hg)
archive.
Questions
have
arisen,
though,
regarding
their
mechanistic
controls
and
reliability.
Here,
we
report
contrasting
tree-ring
Hg
records
in
three
collocated
conifer
species:
Norway
spruce
(
Biogeosciences,
Год журнала:
2022,
Номер
19(17), С. 4415 - 4429
Опубликована: Сен. 14, 2022
Abstract.
Trees
predominantly
take
up
mercury
(Hg)
from
the
atmosphere
via
stomatal
assimilation
of
gaseous
elemental
Hg
(GEM).
is
oxidised
in
leaves/needles
and
transported
to
other
tree
anatomy
including
bole
wood,
where
it
can
be
stored
long-term.
Using
associated
with
growth
rings
facilitates
archiving
historical
GEM
concentrations.
Nonetheless,
there
are
significant
knowledge
gaps
on
cycling
within
trees.
We
investigate
archived
rings,
internal
cycling,
differences
uptake
mechanisms
Norway
spruce
European
larch
sampled
1
km
a
HgCl2-contaminated
site
using
total
(THg)
stable
isotope
analyses.
Tree
ring
samples
indicative
increases
THg
concentrations
(up
521
µg
kg−1)
background
period
(BGP;
facility
closed;
1992–present)
secondary
industrial
(2ndIP;
no
HgCl2
wood
treatment;
1962–1992)
primary
(1stIP;
active
≈
1900–1962).
Mass-dependent
fractionation
(MDF)
data
shifted
negative
during
periods
(δ202Hg
1stIP:
−4.32
±
0.15
‰,
2ndIP:
−4.04
0.32
BGP:
−2.83
0.74
‰;
SD).
Even
accounting
for
−2.6
‰
MDF
shift
uptake,
these
emissions
derived
activity
being
enriched
lighter
isotopes
reduction
Hg0
volatilisation.
Similar
(δ202Hg:
−3.90
0.30
SD)
bark
(137
105
suggests
that
downward
transport
also
dominant
mechanism
(reflective
stomatal-uptake
shift)
rather
than
deposition
bark.
was
sapwood
all
trees
across
both
species.
This
may
indicate
long-term
storage
fraction
or
xylem
solution.
observed
small
range
odd-isotope
mass-independent
(MIF).
Differences
Δ199Hg
between
different
activities
were
(Δ199Hg
0.00
0.03
−0.06
0.04
−0.13
SD),
we
suggest
MIF
signatures
conserved
(reflect
source
signatures).
These
advance
our
understanding
physiological
processing
provide
critical
direction
future
research
into
use
as
archives
atmospheric
Hg.
Environmental Science and Pollution Research,
Год журнала:
2021,
Номер
28(38), С. 54030 - 54040
Опубликована: Май 27, 2021
Thirty-two
trace
elements
were
examined
in
the
tree
rings
of
downy
oak
to
evaluate
pollution
levels
close
a
cement
plant
isolated
rural
context
and
an
industrial
area
where
multiple
sources
air
are
or
present.
Tree
cores
collected
from
trees
growing
1
km
both
that
located
8
each
other.
The
analysis
was
performed
on
annual
1990
2016
using
laser
ablation
inductively
coupled
plasma
mass
spectrometry.
Trace
Cs,
Mg,
Mn,
S
Zn
reflected
emission
history
plant.
Their
values
have
increased
since
early
2000s,
when
started
its
activity.
However,
lack
significant
trends
pollutants
possible
effect
translocation
volatility
some
left
open
questions.
very
weak
changes
other
period
1990-2016
suggest
those
do
not
mark
any
additional
activity
background
pollution.
results
confirm
plants
must
be
considered
forest
archive
accessible
through
dendrochemistry.
Critical Reviews in Environmental Science and Technology,
Год журнала:
2023,
Номер
54(6), С. 445 - 462
Опубликована: Авг. 28, 2023
AbstractFoliage
uptake
of
atmospheric
elemental
mercury
(Hg0)
and
subsequent
translocation
by
the
phloem
is
main
pathway
for
Hg
accumulation
in
tree
rings.
Tree
rings
have
been
used
as
emerging
natural
archive
to
directly
reconstruct
centennial
trends
Hg0
level.
The
tree-ring
records
remote
regions
successfully
reconstructed
peak
anthropogenic
emissions
Europe
North
America
1960s
−
1970s
distinct
increase
Asia
since
1980s.
Combining
concentrations
isotopic
signatures
would
provide
historical
emission
source
shifts.
mechanisms
translocation,
specifically
radial
impacts
environmental
physiological
factors,
are
yet
be
clarified
explain
nonlinear
relation
between
concentration
signals
Thus,
we
recommend
trace
processes
their
fractionation
rings,
examine
relationship
profile
pollution
level
specific
species.
Finally,
suggest
develop
more
statistical
models
quantify
on
rings.Keywords:
Mercuryisotopestree
ringsinfluencing
factorshistorical
recordHANDLING
EDITORS:
Dan
Tsang
Lena
Q.
Ma
Disclosure
statementThe
authors
declare
no
competing
financial
interest.Additional
informationFundingThis
work
was
funded
National
Natural
Science
Foundation
China
[42122053
41977272]
Chongqing
[cstc2020jcyj-msxmX0063].
Forests,
Год журнала:
2023,
Номер
14(10), С. 1997 - 1997
Опубликована: Окт. 5, 2023
Dendrochemistry,
the
study
of
elements
found
within
tree
rings,
has
been
used
to
understand
environmental
changes
from
both
natural
and
anthropogenic
sources.
When
appropriately,
dendrochemistry
can
provide
a
greater
understanding
elemental
in
environment.
However,
species-specific
processes
have
shown
impact
results,
research
field
scrutinized
due
need
for
that
role-specific
such
as
translocation
play.
This
systematic
literature
review
examines
dendrochemistry’s
history,
highlights
how
changed,
hypothesizes
where
it
might
be
headed.
From
this
review,
we
recommend
following
measures:
(1)
promoting
use
new
experimental
techniques
methods
with
faster
data
acquisition
time
allow
number
samples
processed
included
studies
increase
statistical
significance;
(2)
more
focus
on
two-
three-dimensional
space
trees
grow
consider
complex
physiological
occurring
over
(3)
lab-based
reduce
variables
cannot
controlled
when
sampling
situ.
Understanding
challenges
opportunities
past,
present,
future
is
crucial
advancement
field.
Forests,
Год журнала:
2021,
Номер
12(11), С. 1505 - 1505
Опубликована: Окт. 31, 2021
This
research
investigates
the
long-term
environmental
impact
and
historical
temporal
pollution
patterns
caused
by
a
former
copper
mine
in
Iwiny
(south-western
Poland)
using
dendrochemical
approach.
An
additional
aspect
of
this
was
considering
possibility
inductively
coupled
plasma-optical
emission
spectrometry
(ICP-OES)
measurement
technique
as
cheaper
alternative
to
plasma
mass
(ICP-MS)
analyses
conducted
mining
areas.
In
study
area,
tailings
storage
facility
(TSF)
dam
failure
(1967)
took
place
alkaline
flotation
waste
containing
high
concentration
Cu
Pb
are
stored.
Tree
cores
from
pedunculate
oak
(Quercus
robur
L.)
were
analysed
for
content
11
trace
elements
(TEs)
(Cd,
Mn,
Ni,
Zn,
Cr,
Co,
Pb,
Cu,
Fe,
Al,
Ag)
ICP-OES
technique,
while
tree
rings’
widths
(TRWs)
also
measured.
Samples
that
most
significant
context
goals
verified
with
ICP-MS
method.
The
results
revealed
strong
industry
reflected
substantial
increase
mean
contents
of:
(1)
Fe
industrial
vs.
control
trees,
(2)
TRWs
trees.
However,
observed
TEs
did
not
correspond
known
timing
inputs
(mining
activity,
spill).
Peak
levels
Zn
after
closed.
lack
new
sources
relationship
strongly
suggests
rings
recorded
chemical
signal
TSF
reclamation
(the
use
fertilizers
agrotechnical
interventions).
Patterns
7
detected
samples
(Co
Cd
detected,
Al
Ag
partly
detected),
all
elements.
Significant
differences
obtained
Ag,
Cd,
Co.
Despite
challenges
application
dendrochemistry
on
old
areas
(e.g.,
trees),
it
has
proved
be
useful
tool
investigating
aggregate
impact.
Biolohichni systemy,
Год журнала:
2022,
Номер
14(2), С. 166 - 171
Опубликована: Янв. 1, 2022
The
bioindicative
prospects
of
Picea
abies
L.
in
the
conditions
an
urbanized
environment
are
analyzed
based
on
complex
morphological
parameters
species'
vitality.
preference
conifers
as
phytoindicators
populated
areas
is
substantiated
due
to
peculiarities
their
physiology
and
structure.
Simple,
convenient
informative
phytoindicative
markers
vitality
applied:
weight,
length
type
degree
needle
necrosis,
well
general
sanitary
condition
species
individuals.
use
indicators
coniferous
plants
proposed
alternative
physiological
biochemical
methods
biomonitoring,
or
analytical
ecological
monitoring
urban
environment.
research
conducted
functional
zones
Ivano-Frankivsk
city,
selected
principle
basis
zoning.
A
decrease
needles
mass
transport
routes
zone
residential
development
established
by
1.9
1.6
times,
relative
background
values,
respectively.
At
same
time,
a
constant
parameter
does
not
undergo
significant
compared
area.
In
ecosystem
state
individuals
observed
following
series
zones:
→
greening
routes.
highest
necrosis
city's
routes,
while
dominant
apical.
This
sign
heavy
metals
accumulation
other
anthropogenic
pollutants
at
tips
needles,
which
adaptive
mechanism
response
stress.
most
common
first
fifth
degrees.
percentage
with
signs
drying
city
-
39%.
area
this
approximately
20%,
2%.
class
damage
refers
growing
zone,
second
existing
third
fixed
route
city.
promising
biological
indicator
quality
recommended
for
wider
implementation
practice
ecosystems.