INVESTIGADORES
PERILLO Gerardo Miguel E.
congresos y reuniones científicas
Título:
, Estimation of ecosystem metabolism from high frequency data in a saline shallow lake: La Salada (Argentina).
Autor/es:
ALFONSO, M.B.; VITALE, A.J.; MENENDEZ, M.C.; PERILLO, V.L.; PICCOLO, M.C.; PERILLO, G.M.E.
Lugar:
Orford
Reunión:
Workshop; GLEON 16; 2014
Institución organizadora:
GLEON
Resumen:
Continuous monitoring of changes in dissolved oxygen concentration (DO) allows
the estimation of ecosystem
metabolism
and
provides
a
measure
of
the
overall
activity
of
an
ecosystem,
summarizing
the
biogeochemical
and
trophic
processes,
and
determining
the
efficiency
of
resource
processing.
The
aim
of
this
study
was
to
determine
the
temporal
dynamics
and
regulation
of
the
ecosystem
metabolism
in
a
saline
shallow
lake,
La
Salada,
located
in
the
South
of
Buenos
Aires
Province,
Argentina.
We
estimate
net
ecosystem
production
(NEP),
ecosystem/community
respiration
(R),
and
gross
primary
production
(GPP)
rates,
in
relation
to
physico-‐
chemical
and
climatic
variables
for
18
months.
Net
autotrophic
conditions
prevailed
during
the
study
period
(NEP
=
64.05
±
44.22
mmol
O2
m-‐2).
Annual
and
interannual
variation
of
water
level
seems
to
be
a
major
factor
influencing
the
ecological
processes
in
the
system,
as
well
as
temperature
and
conductivity
due
to
evapoconcentration.
GPP
and
R
followed
a
similar
pattern
over
time,
with
GPP
over
R,
implying
that
La
Salada
is
a
very
productive
ecosystem
and
produces
significantly
more
organic
material
than
it
is
able
to
degrade.
The
excess
may
either
be
exported
to
adjacent
systems
and/or
accumulate
within
the
system.