FEMS Microbiology Ecology,
Год журнала:
2015,
Номер
91(3)
Опубликована: Янв. 14, 2015
Polycyclic
aromatic
hydrocarbons
(PAH)
are
widespread
and
persistent
environmental
contaminants,
especially
in
oxygen-free
environments.
The
occurrence
of
anaerobic
PAH-degrading
bacteria
their
underlying
metabolic
pathways
rarely
known.
In
this
study,
PAH
degraders
were
enriched
laboratory
microcosms
under
sulfate-reducing
conditions
using
groundwater
sediment
samples
from
four
PAH-contaminated
aquifers.
Five
enrichment
cultures
obtained
showing
sulfate-dependent
naphthalene
degradation.
Mineralization
was
demonstrated
by
the
formation
sulfide
concomitant
with
depletion
development
13C-labeled
CO2
[13C6]-naphthalene.
16S
rRNA
gene
metaproteome
analyses
revealed
that
organisms
related
to
Desulfobacterium
str.
N47
main
cultures.
Protein
sequences
highly
similar
enzymes
degradation
pathway
identified,
suggesting
activated
a
carboxylase,
central
metabolite
2-naphthoyl-CoA
further
reduced
two
reductases.
data
indicate
an
importance
members
family
Desulfobacteraceae
for
freshwater
Proceedings of the National Academy of Sciences,
Год журнала:
2018,
Номер
115(25), С. 6506 - 6511
Опубликована: Май 21, 2018
Significance
The
composition
of
the
biosphere
is
a
fundamental
question
in
biology,
yet
global
quantitative
account
biomass
each
taxon
still
lacking.
We
assemble
census
all
kingdoms
life.
This
analysis
provides
holistic
view
and
allows
us
to
observe
broad
patterns
over
taxonomic
categories,
geographic
locations,
trophic
modes.
Freshwater Science,
Год журнала:
2014,
Номер
34(1), С. 355 - 367
Опубликована: Дек. 24, 2014
Our
daily
life
depends
on
many
services
delivered
by
the
planet's
ecosystems.
Groundwater
ecosystems
deliver
that
are
of
immense
societal
and
economic
value,
such
as:
1)
purification
water
its
storage
in
good
quality
for
decades
centuries,
2)
active
biodegradation
anthropogenic
contaminants
inactivation
elimination
pathogens,
3)
nutrient
recycling,
4)
mitigation
floods
droughts.
Many
these
directly
connected
to
presence
activity
specific
organisms,
microorganisms,
or
metazoa.
Sustainable
protection
management
important
groundwater
ecosystem
will
require
quantitative
understanding
processes
at
different
spatial
temporal
scales
assessment
their
resistance
resilience
with
regard
common
impacts.
review
compiles
known
and,
where
appropriate,
highlights
research
gaps.
Water,
Год журнала:
2020,
Номер
12(1), С. 260 - 260
Опубликована: Янв. 16, 2020
In
this
overview
(introductory
article
to
a
special
issue
including
14
papers),
we
consider
all
main
types
of
natural
and
artificial
inland
freshwater
habitas
(fwh).
For
each
type,
identify
the
biodiversity
patterns
ecological
features,
human
impacts
on
system
environmental
issues,
discuss
ways
use
information
improve
stewardship.
Examples
selected
key
biodiversity/ecological
features
(habitat
type):
narrow
endemics,
sensitive
(groundwater
GDEs);
crenobionts,
LIHRes
(springs);
unidirectional
flow,
nutrient
spiraling
(streams);
naturally
turbid,
floodplains,
large-bodied
species
(large
rivers);
depth-variation
in
benthic
communities
(lakes);
endemism
diversity
(ancient
lakes);
threatened,
(oxbow
lakes,
SWE);
diverse,
reduced
littoral
(reservoirs);
cold-adapted
(Boreal
Arctic
fwh);
endemism,
depauperate
(Antarctic
flood
pulse,
intermittent
wetlands,
biggest
river
basins
(tropical
variable
hydrologic
regime—periods
drying,
flash
floods
(arid-climate
fwh).
Selected
impacts:
eutrophication
other
pollution,
modifications,
overexploitation,
habitat
destruction,
invasive
species,
salinization.
Climate
change
is
threat
multiplier,
it
important
quantify
resistance,
resilience,
recovery
assess
strategic
role
different
ecosystems
their
value
for
conservation.
Effective
conservation
solutions
are
dependent
an
understanding
connectivity
between
(including
related
terrestrial,
coastal
marine
systems).
Molecular Ecology,
Год журнала:
2011,
Номер
21(8), С. 1878 - 1896
Опубликована: Ноя. 18, 2011
Abstract
Aquatic
environments
harbour
large
and
diverse
microbial
populations
that
ensure
their
functioning
sustainability.
In
the
current
context
of
global
change,
characterizing
diversity
has
become
crucial,
new
tools
have
been
developed
to
overcome
methodological
challenges
posed
by
working
with
microbes
in
nature.
The
advent
Sanger
sequencing
now
next‐generation
technologies
enabled
resolution
communities
an
unprecedented
degree
precision.
However,
correctly
interpret
its
patterns
this
revolution
must
also
consider
conceptual
matters.
This
review
presents
advances,
gaps
caveats
these
recent
approaches
when
considering
microorganisms
aquatic
ecosystems.
We
discuss
potentials
limitations
available
methodologies,
from
water
sampling
sequence
analysis,
suggest
alternative
ways
incorporate
results
a
framework.
Together,
methods
will
allow
us
gain
understanding
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Июнь 13, 2023
Abstract
Around
50%
of
humankind
relies
on
groundwater
as
a
source
drinking
water.
Here
we
investigate
the
age,
geochemistry,
and
microbiology
138
samples
from
95
monitoring
wells
(<250
m
depth)
located
in
14
aquifers
Canada.
The
geochemistry
show
consistent
trends
suggesting
large-scale
aerobic
anaerobic
hydrogen,
methane,
nitrogen,
sulfur
cycling
carried
out
by
diverse
microbial
communities.
Older
groundwaters,
especially
with
organic
carbon-rich
strata,
contain
average
more
cells
(up
to
1.4
×
10
7
mL
−1
)
than
younger
challenging
current
estimates
subsurface
cell
abundances.
We
observe
substantial
concentrations
dissolved
oxygen
(0.52
±
0.12
mg
L
[mean
SE];
n
=
57)
older
groundwaters
that
seem
support
metabolisms
ecosystems
at
an
unprecedented
scale.
Metagenomics,
isotope
analyses
mixing
models
indicate
dark
is
produced
situ
via
dismutation.
ancient
sustain
productive
communities
highlight
overlooked
present
past
Earth.
