Research Square (Research Square),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Aug. 26, 2022
Abstract
Deposition
of
particulate
matter
(PM)
from
a
variety
sources
onto
pollinator
habitat
is
largely
unexplored
source
risk
to
pollinators.
Synthetic
steroid
growth
promoters,
antibiotics,
and
multiple
pesticides
have
been
detected
in
fugitive
beef
cattle
feedyard
PM.
Subsequently,
many
these
chemicals
determined
be
associated
with
PM
on
flowers
near
feedyards,
as
well
bees
visiting
those
flowers.
Therefore,
there
need
assess
pollinators
posed
by
deposition
agrochemical-laden
PM,
both
the
field
laboratory.
Unfortunately,
are
no
established
laboratory
methods
for
simulating
exposure
or
toxicity
contaminated
Herein
we
describe
development
utilization
circulation
system
that
can
employed
under
controlled
conditions.
Two
model
organisms
(honeybees
(
Apis
mellifera
)
mason
Osmia
lignaria
))
were
exposed
agrochemical-free
circulator
system,
post-exposure
mortality
was
compared
controls.
No
significant
differences
between
control
observed.
These
results
confirm
validity
use
laboratory-controlled
experiments,
offer
positive
negative
groups
experiments
examining
potentially
toxic
chemical-laden
Agriculture,
Journal Year:
2023,
Volume and Issue:
13(12), P. 2209 - 2209
Published: Nov. 28, 2023
The
aim
of
our
research
was
to
compare
the
levels
pollution
in
different
habitats
based
on
concentrations
heavy
metals
found
pollen
and
organisms
Osmia
bicornis
L.
bees
three
habitats:
orchards,
berry
plantations,
urban
(near
by
power
plant,
landfill,
residential
areas,
vehicle
traffic).
concentration
Ag,
Cd,
Cu,
Fe,
Mn,
Ni,
Pb
Zn
were
determined.
Samples
quantified
using
flame
atomic
absorption
spectrophotometry
(AAS),
with
evaluations
being
carried
out
times
for
each
sample.
Bee
nests
also
analyzed
concerning
reproduction
presence
parasites.
There
no
significant
differences
content
samples
between
habitat
types.
differed
only
their
content,
which
significantly
higher
orchards
(2.67
mg/kg)
than
(0.80
plantation
(0.94
mg/kg).
Habitat
type
had
effect
most
bee
reproductive
parameters
(percentage
occupied
nest
tubes,
population
growth).
Our
results
show
that
pollinating
crops
in,
example
or
plantations
are
exposed
a
similar
extent
those
areas.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: March 24, 2023
Abstract
Background
Beef
cattle
feedlot-derived
particulate
matter
(PM)
is
a
complex
mixture
of
dust,
animal
waste,
agrochemicals,
and
bioaerosols.
No
empirical
data
currently
exists
quantifying
human
exposure
PM-bound
agrochemicals
downwind
feedlots.
Objectives
There
were
three
objectives
the
current
study:
1)
to
determine
spatial
extent
magnitude
PM
transport
large
beef
feedlot
facilities,
2)
quantify
occurrence
pyrethroid
insecticides
anthelmintics
in
PM,
3)
assess
cumulative
health
risk
agriculture-adjacent
communities
Methods
Authors
investigated
(<1
>12
km)
total
suspended
particulates
(TSP)
from
feedlots
Southern
Great
Plains
(SGP)
North
America.
collected
on
TSP
filters
was
analyzed
via
UHPLC-MS/MS
for
six
pyrethroids
(bifenthrin,
λ-cyhalothrin,
cypermethrin,
esfenvalerate,
fenvalerate,
permethrin)
five
macrocyclic
lactones
(MLs;
abamectin,
doramectin,
eprinomectin,
ivermectin,
moxidectin).
An
distance
decay
model
used
probabilistic
concentrations
ambient
air.
Results
Downwind
exhibited
rapid
decline
0.01
-
≤1.6
km
(Monte
Carlo-simulated
mean
±
SEM;
5,049
96.1
µg/m
3
)
subsequent
stabilization
>1.6
–
12.4
(1,791
9.9;
).
did
not
converge
background
levels
within
study
(12.4
km).
Agrochemicals
detected
>LOQ
at
greater
overall
frequency
(40.6%)
than
upwind
locations
(26.8%).
Two
highest
(mean
fenvalerate
=
5.9
0.8,
permethrin
1.1
0.3
ng/m
),
screening-level
estimates
indicate
elevated
(LOC
1;
RI
0.173)
children
(1-2
yrs)
living
near
commercial
agricultural
operations
SGP.
Discussion
significantly
expand
known
distribution
consequently
highlight
pathways
unrecognized
residential
assessments
evaluations.
Neonicotinoid
insecticides
(NNIs)
released
into
the
environment
will
inevitably
be
enriched
in
sediments
and
enter
human
body
through
food
chain,
posing
a
risk
to
ecological
safety
health
areas
concerned.
In
this
study,
79
sediment
samples
from
2
major
River
basins
north
south
China
were
selected
analyzed
for
content,
components,
distribution
sources
of
8
NNIs,
new
evaluation
model
was
constructed
analyze
judge
risks
target
compounds
relevant
areas.
The
results
showed
that
average
content
NNIs
Jianjiang
basin
(2.34
μg/kg)
greater
than
Liaohe
(2.32
μg/kg),
regions
different
might
belong
types
agricultural
production.
assessment
indicated
ecotoxicological
population
Basin
are
higher
basin,
therefore
continued
attention
should
paid
hazardous
materials
such
as
NNIs.
study
can
provide
targeted
scientific
references
pollution
management
environment.
Research Square (Research Square),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Aug. 26, 2022
Abstract
Deposition
of
particulate
matter
(PM)
from
a
variety
sources
onto
pollinator
habitat
is
largely
unexplored
source
risk
to
pollinators.
Synthetic
steroid
growth
promoters,
antibiotics,
and
multiple
pesticides
have
been
detected
in
fugitive
beef
cattle
feedyard
PM.
Subsequently,
many
these
chemicals
determined
be
associated
with
PM
on
flowers
near
feedyards,
as
well
bees
visiting
those
flowers.
Therefore,
there
need
assess
pollinators
posed
by
deposition
agrochemical-laden
PM,
both
the
field
laboratory.
Unfortunately,
are
no
established
laboratory
methods
for
simulating
exposure
or
toxicity
contaminated
Herein
we
describe
development
utilization
circulation
system
that
can
employed
under
controlled
conditions.
Two
model
organisms
(honeybees
(
Apis
mellifera
)
mason
Osmia
lignaria
))
were
exposed
agrochemical-free
circulator
system,
post-exposure
mortality
was
compared
controls.
No
significant
differences
between
control
observed.
These
results
confirm
validity
use
laboratory-controlled
experiments,
offer
positive
negative
groups
experiments
examining
potentially
toxic
chemical-laden
