bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Nov. 11, 2022
Summary
The
American
lobster,
Homarus
americanus
,
is
an
economically
valuable
and
ecologically
important
crustacean
along
the
North
Atlantic
coast
of
America.
Populations
in
southern
locations
have
declined
recent
decades
due
to
increasing
ocean
temperatures
disease,
these
circumstances
are
progressing
northward.
We
monitored
57
adult
female
lobsters,
healthy
shell-diseased,
under
three
seasonal
temperature
cycles
for
a
year,
track
shell
bacterial
communities
using
culturing
16S
rRNA
gene
sequencing,
progression
ESD
visual
assessment,
antimicrobial
activity
hemolymph.
richness
taxa
present,
evenness
abundance,
community
similarity
between
lobsters
was
affected
by
water
at
time
sampling,
over
based
on
regimes,
disease
severity,
molt
stage.
Several
bacteria
were
prevalent
lobster
shells
but
missing
or
less
abundant
diseased
shells,
although
putative
pathogens
found
all
regardless
health
status.
Graphical
abstract
Proceedings of the Royal Society B Biological Sciences,
Journal Year:
2024,
Volume and Issue:
291(2015)
Published: Jan. 17, 2024
Kelp
forests
are
threatened
by
ocean
warming,
yet
effects
of
co-occurring
drivers
such
as
CO
2
rarely
considered
when
predicting
their
performance
in
the
future.
In
Australia,
kelp
Ecklonia
radiata
forms
extensive
across
seawater
temperatures
approximately
7–26°C.
Cool-edge
populations
typically
more
thermally
tolerant
than
warm-edge
counterparts
but
this
ignores
possibility
local
adaptation.
Moreover,
it
is
unknown
whether
elevated
can
mitigate
negative
warming.
To
identify
could
improve
thermal
a
cool-edge
population
E.
,
we
constructed
curves
for
growth
and
photosynthesis,
under
both
current
(approx.
400
1000
µatm).
We
then
modelled
annual
warming
scenarios
to
highlight
susceptibility.
Elevated
had
minimal
effect
on
increased
photosynthesis
around
optimum.
Thermal
optima
were
16°C
18°C
indicated
may
be
vulnerable
Our
findings
demonstrate
that
unlikely
offset
potential
susceptibility
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(2)
Published: Feb. 1, 2024
Understory
assemblages
associated
with
canopy-forming
species
such
as
trees,
kelps,
and
rockweeds
should
respond
strongly
to
climate
stressors
due
strong
canopy-understory
interactions.
Climate
change
can
directly
indirectly
modify
these
assemblages,
particularly
during
more
stressful
seasons
scenarios.
However,
fully
understanding
the
seasonal
impacts
of
different
conditions
on
canopy-reliant
is
difficult
a
continued
emphasis
studying
single-species
responses
single
future
scenario
season.
To
examine
emergent
effects,
we
used
mesocosm
experiments
expose
seaweed
golden
rockweed,
iScience,
Journal Year:
2023,
Volume and Issue:
26(5), P. 106606 - 106606
Published: April 8, 2023
The
American
lobster,
Homarus
americanus,
is
an
economically
valuable
and
ecologically
important
crustacean
along
the
North
Atlantic
coast
of
America.
Populations
in
southern
locations
have
declined
recent
decades
due
to
increasing
ocean
temperatures
disease,
these
circumstances
are
progressing
northward.
We
monitored
57
adult
female
lobsters,
healthy
shell
diseased,
under
three
seasonal
temperature
cycles
for
a
year,
track
bacterial
communities
using
culturing
16S
rRNA
gene
sequencing,
progression
epizootic
disease
visual
assessment,
antimicrobial
activity
hemolymph.
richness
taxa
present,
evenness
abundance,
community
similarity
between
lobsters
was
affected
by
water
at
time
sampling,
over
based
on
regimes,
severity,
molt
stage.
Several
bacteria
were
prevalent
lobster
shells
but
missing
or
less
abundant
diseased
shells,
although
some
found
all
regardless
health
status.
Journal of Crustacean Biology,
Journal Year:
2024,
Volume and Issue:
44(1)
Published: Feb. 9, 2024
Abstract
The
American
lobster,
Homarus
americanus,
H.
Milne
Edwards,
1837
is
an
ecologically,
economically,
and
culturally
valuable
marine
resource
for
the
coastal
communities
in
Gulf
of
Maine.
Lobsters
Maine
are
experiencing
effects
rapid
warming
acidification
due
to
climate
change.
Lobster
shells
comprised
chitin
with
precisely
precipitated
minerals
(calcite,
amorphous
calcium
carbonate,
carbonate
apatite)
that
provide
structural
integrity
shell
protection
against
predators
microbial
intrusion.
We
examined
combined
ocean
on
mineralogy,
epibiont
abundance,
growth
early
benthic
juveniles.
were
grown
under
six
different
temperature/pCO2
treatment
conditions
over
52
days
(three
replicates
per
treatment)
aligned
environmentally
relevant
as
well
predicted
future
extremes.
Elevated
pCO2
temperature
led
a
decrease
magnesium
content,
suggesting
these
environmental
stressors
inhibit
biomineralization.
There
was
interactive
effect
abundance
probability
coverage
increasing
temperature.
alone
significantly
correlated
(P
=
0.002)
decreased
growth,
but
only
female
lobsters.
Ocean
affect
juvenile
risk
injury
disease
potential
downstream
consequences
lobster
fishery.
Marine Ecology Progress Series,
Journal Year:
2024,
Volume and Issue:
744, P. 83 - 99
Published: July 25, 2024
The
relationship
between
adverse
environmental
conditions
and
grooming
behavior
is
an
unresolved
mechanism
whereby
a
changing
climate
may
impact
reproductive
success
in
animals
that
brood
their
eggs.
Although
important
to
embryo
survival
development
decapod
crustaceans,
by
ovigerous
females
be
impacted
energetically
demanding
associated
with
change,
which
contribute
lethal
sublethal
outcomes
for
health
survival.
Despite
its
potential
importance
reproduction,
brood-grooming
has
not
been
empirically
described
the
American
lobster
Homarus
americanus
H.
Milne
Edwards,
1837,
commercially
marine
decapod.
behavior,
temperature,
pH
was
explored
at
different
points
embryogenesis
of
lobsters.
For
period
5
mo,
egg-bearing
were
exposed
combinations
ecologically
relevant
temperature
pH,
including
those
reflecting
ocean
warming
(+4°C),
acidification
(-0.5
pH),
combination
acidification.
Fecundity,
development,
female
assessed
multiple
time
points.
proportion
lobsters
spent
fanning,
but
probing,
broods
increased
advancing
development.
Neither
egg
loss,
nor
any
measured
behaviors,
varied
significantly
or
this
experiment.
reproduction
appears
well
suited
tolerate
future
based
on
ability
maintain
stable
mortality
levels
under
range
conditions.