The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
957, P. 177452 - 177452
Published: Nov. 19, 2024
High
loads
of
nutrients
like
phosphorus
(P)
persistently
degrade
water
quality
in
floodplain
waterbodies
and
cause
eutrophication,
i.e.,
elevated
algae
production.
Despite
continuous
efforts
to
curb
external
nutrient
entering
freshwaters,
internal
P
release
from
sediments
frequently
sustains
eutrophication.
Benthic
microbial
communities
considerably
impact
turnover
through
the
mineralisation
organic
matter
may
strongly
affect
retention
release,
which
can
be
estimated
via
buffering
potential.
However,
how
these
processes
shape
potential
hydrologically
dynamic
systems
floodplains
is
poorly
understood.
Here,
we
assessed
coupled
effects
lateral
hydrological
connectivity,
dissolved
(DOM)
benthic
activity
on
a
river-floodplain
system.
We
examined
seven
sites
shallow
that
were
either
connected
or
disconnected
River
Elbe
(Magdeburg,
Germany)
after
summer
contraction
phase.
Our
findings
show
significantly
higher
thus,
likely
risk
within
sites,
corroborated
by
distinct
community-level
physiological
profiles.
The
was
positively
correlated
with
more
labile,
low
molecular
weight
DOM
quality,
increased
autochthonous
contribution,
pronounced
enzymatic
degradation
hemicellulose
(β-xylosidase
activity).
study
underscores
pivotal
role
enzyme
shaping
sediment
systems.
Moreover,
our
results
demonstrate
importance
critical
yet
often
overlooked
microbe-organic
interactions
for
dynamics
waterbodies.
