In
de
laatste
jaren
zien
we
een
toenemend
aantal
meldingen
over
niet-inheemse
invasieve
rivierkreeften
in
Vlaanderen.De
toename
geldt
niet
alleen
voor
het
waarnemingen,
maar
ook
soorten.Hoewel
verschillende
soorten
op
Unielijst
staan
als
zorgwekkende,
exoten
EU,
zijn
er
Vlaanderen
tot
dusver
beperkte
initiatieven
opgestart
om
deze
te
bestrijden
of
hun
verspreiding
perken.Dit
rapport
bundelt
beschikbare
kennis
rivierkreeftenproblematiek,
en
is
eerste
aanzet
beheer
van
organismen.In
plaats
geven
overzicht
mogelijke
impact
uitheemse
zowel
biota
fysieke
omgeving.Hun
trofische
verwevenheid
leidt
rechtstreekse
onrechtstreekse
groepen
macrofyten,
amfibieën,
vissen
invertebraten.Als
drager
pathogenen
kunnen
zij
ziektes
verder
verspreiden,
belemmeren
herintroductie
inheemse
Europese
rivierkreeft.Ook
rivierkreeftengedrag
bewerkstelligt
verdere
achteruitgang
watersysteem.Graafgedrag
oevers
zorgt
hogere
sedimentflux
naar
waterkolom.Ook
wijze
voortbewegen
foerageergedrag
leiden
vertroebeling
waterkolom.De
recht
evenredig
met
densiteit
aanwezige
populatie
rivierkreeften,
afhankelijk
soort
rivierkreeft.Voor
elk
wordt
verspreiding,
voornaamste
eigenschappen
introductiegeschiedenis
toegelicht.Ook
die
zich
hier
potentieel
vestigen
worden
detail
besproken.Dit
beschouwde
rivierkreeften:
Aanwezig
VlaanderenTe
verwachten
Gevlekte
Amerikaanse
rivierkreeft
Gewone
Yabby
Californische
Calicotkreeft
Turkse
Kentuckyrivierkreeft
Gestreepte
Roestbruine
Rode
Geknobbelde
Marmerkreeft
Een
beheerregeling
surveillancenetwerk,
bijvoorbeeld
implementatie
eDNAtechnologie,
laat
toe
proactief
invasies
organismen
Oikos,
Journal Year:
2024,
Volume and Issue:
2024(4)
Published: Jan. 22, 2024
The
zebra
mussel
Dreissena
polymorpha
is
one
of
the
most
successful,
notorious,
and
detrimental
aquatic
invasive
non‐native
species
worldwide,
having
invaded
Europe
North
America
while
causing
substantial
ecological
socio‐economic
impacts.
Here,
we
investigated
spatiotemporal
trends
in
this
species'
invasion
success
using
178
macroinvertebrate
abundance
time
series,
containing
1451
records
D.
collected
across
nine
European
countries
between
1972–2019.
Using
these
raw
(absolute)
data,
examined
drivers
occurrences
relative
abundances
within
communities.
Meta‐regression
models
revealed
non‐significant
both
at
level
for
majority
countries,
except
France
(significant
decreasing
trend)
Hungary
(marginally
positive
trend).
At
level,
number
over
followed
a
flat‐top
bell‐shaped
distribution,
with
steep
increase
1973–1989
by
plateau
phase
prior
to
significantly
declining
post‐1998.
series
climatic
hydromorphological
site‐specific
characteristics
uninvaded
sites
from
two
periods
(1998–2002;
2011–2015),
found
that
native
richness,
abundance,
distance
next
barrier,
elevation
were
associated
occurrence
.
We
also
higher
richness
lower
latitude
related
abundances.
Cohen's
D
as
measure
impact,
biodiversity
was
initially
than
ones,
but
then
declined,
suggesting
differences
sites.
While
our
results
emphasise
high
,
increasing
stressors
context
global
change
–
particularly
ongoing
climate
are
likely
enhance
rates
impact
near
future,
exacerbated
lack
timely
effective
management
actions.
Hydrobiologia,
Journal Year:
2022,
Volume and Issue:
850(12-13), P. 2537 - 2562
Published: July 4, 2022
Abstract
Striving
for
an
integrated
semi-natural
stream-floodplain
system
as
restoration
target
would
optimally
serve
biodiversity
and
the
provisioning
of
ecosystem
services.
This
pursuit
is
currently
limited
by
multiple
pressures
constraints
that
come
with,
amongst
others,
a
high
human
population
density
intensive
land-use.
To
be
able
to
weigh
ecological
societal
needs
in
lowland-stream
watersheds,
we
analysed
developments
relation
actual
potential
state
ecosystems
services
these
systems
provide.
reach
ecological-societal
balance
stream
restoration,
pose
five
steps:
(i)
Choose
clear
realistic
target,
(ii)
Map
quantify
environmental
stressors
at
local
watershed
scale,
(iii)
biological
indicators
regional
(iv)
List
measures
remove
or
mitigate
stressors,
(v)
Build
scenarios,
composed
combinations
fitting
context
watershed.
The
most
promising
scenarios
make
use
processes
involve
establishing
transverse
landscape
zonation,
from
streams’
riparian
zone
uplands.
Such
transition
poses
challenge
policy
makers
implies
strong
change.
Therefore,
framework
provided
with
building
blocks
help
find
suitable
practice.
NeoBiota,
Journal Year:
2022,
Volume and Issue:
74, P. 105 - 127
Published: July 15, 2022
The
widespread
presence
of
North
American
alien
crayfish
in
Europe
is
a
major
driver
native
population
declines,
mainly
because
they
are
chronic
carriers
the
oomycete
Aphanomyces
astaci
responsible
for
plague.
Screening
plague
pathogen
host
populations
has
become
common
practice
across
Europe,
but
sampling
usually
covers
spatial
not
temporal
variation.
Our
study
focuses
on
current
situation
Czechia,
where
screening
A.
was
first
conducted
mid-2000s.
We
provide
data
about
distribution
and
prevalence
this
at
almost
50
sites
with
three
crayfish:
spiny-cheek
Faxonius
limosus
,
signal
Pacifastacus
leniusculus
marbled
Procambarus
virginalis
.
Among
these
were
20
localities
that
resampled
several
years
(usually
more
than
decade)
after
original
did
detect
any
infection
two
studied
P.
documented
new
hotspots
highly
infected
site
coexistence
latter
F.
suggest
despite
some
fluctuations,
generally
does
tend
to
change
significantly
over
time;
we
only
observed
cases
significant
increase
one
decrease.
no
longer
detected
originally
weakly
populations,
our
it
likely
still
persists
areas
threatens
populations.
At
single
known
country
coexist,
same
genotype
group
both
species,
due
interspecific
transmission
from
former
latter.
However,
genotyping
individuals
supported
link
between
specific
genotypes
hosts,
suggesting
assessment
sources
mass
mortalities
feasible
European
regions
mutual
contact
different
species
uncommon.
Animals,
Journal Year:
2023,
Volume and Issue:
13(7), P. 1240 - 1240
Published: April 3, 2023
A
scientometric
analysis
was
conducted
to
investigate
the
trends
and
development
of
crayfish
research
in
terms
literature
published,
author,
affiliation,
countries'
collaborative
networks,
as
well
co-citation
dataset
(e.g.,
article,
keywords).
The
study
analyzed
12,039
bibliographic
datasets
from
Web
Science,
using
CiteSpace
a
tool
for
analysis.
revealed
extraordinary
increases
publication
trends,
with
total
21,329
authors
involved
approximately
80%
countries
around
world
(163/195)
having
research.
Unsurprisingly,
such
USA
China,
followed
by
European
countries,
were
among
top
that
have
published
crayfish-related
studies.
findings
also
indicated
"invasive
crayfish"
world's
keyword
Crayfish
species
are
important
both
environmental
sustainability
(invasiveness
composition)
social
wellbeing
(aquaculture),
which
provides
directions
research,
philanthropic,
academic,
government,
non-government
organizations
regarding
how
invest
limited
resources
into
policies,
programs,
towards
future
management
this
species.
Our
concluded
strategic
collaboration
authors,
institutions,
would
be
vital
tackle
issue
invasive
world.
Freshwater Biology,
Journal Year:
2022,
Volume and Issue:
67(6), P. 1005 - 1019
Published: March 11, 2022
Abstract
The
nature
and
extent
of
effects
increasing
densities
non‐native
species
on
stream
ecosystems
remain
poorly
understood.
Non‐native
crayfish
are
among
the
most
invasive
aquatic
we
hypothesised
that,
in
temperate
streams,
trophic
modification
increases
with
density.
Instream
flow‐through
mesocosms
River
Lune,
north‐east
England,
were
used
over
a
47‐day
period
summer
to
measure
density
signal
Pacifastacus
leniusculus
different
ecosystem
components
(benthic
fish,
macroinvertebrates,
algal
biomass,
leaf
litter
breakdown).
Effects
measured
through
three
treatments
(low,
medium,
high;
four,
eight,
or
12
five
bullhead
Cottus
perifretum
per
1.5
m
2
)
two
control
(crayfish
fish
absent;
absent
benthic
present)
groups.
Impacts
macroinvertebrates
(density,
taxonomic
composition),
(growth,
diet),
standing
stock,
decomposition
rates
increased
Direct
more
important
than
indirect
cascade
effects.
Despite
similar
invertebrate
abundance
richness
across
enclosures
before
introducing
bullhead,
they
differed
significantly
from
controls
at
end
study,
>80%
reduction
macroinvertebrate
recorded
high‐density
group.
Stable
isotope
(δ
15
N,
δ
13
C)
analysis
showed
that
niche
but
not
crayfish,
changed
when
sympatry.
Bullhead
treatment
occupied
lower
position
food
web
those
group
lost
4.2%
body
mass
study
period,
confirming
existence
resource
competition.
Leaf
break
down
was
59.2%
faster,
biomass
91.4%
highest
compared
without
animals.
This
indicates
even
low
density,
can
strongly
alter
multiple
emphasises
need
for
minimising
spread
within
between
streams.
PLoS ONE,
Journal Year:
2022,
Volume and Issue:
17(1), P. e0263133 - e0263133
Published: Jan. 27, 2022
The
European
native,
noble
crayfish
(Astacus
astacus)
has
suffered
from
a
serious
and
long
term
population
decline
due
to
habitat
destruction,
water
pollution
the
impact
of
invasive
North
American
that
are
carriers
plague
(Aphanomyces
astaci).
latter
being
major
factor
currently
confining
uninvaded
(parts
of)
waterbodies.
However,
recently
wild
populations
apparently
healthy
carrying
have
been
found.
As
known
for
their
inter-
intraspecific
agonistic
behaviour
which
may
be
key
competitive
success,
this
raised
interesting
question
what
would
happen
if
not
dominant
anymore
in
interaction
between
native
species.
Since
outcome
those
encounters
is
still
unclear,
study
explores
whether
can
stand
its
ground
towards
species
such
interactions.
Furthermore,
ability
acquire
shelter
through
also
assessed.
Through
pairwise
staged
interactions,
competition
A.
astacus
Faxonius
limosus
Procambarus
acutus
were
examined.
results
showed
triumphs
over
F.
P.
shelter.
In
turn,
dominates
possible
future
situations
does
no
longer
eradicate
populations,
our
show
might
promising
when
confronted
with