spatio-temporal distribution of air-water co exchange in ... · susana flecha 1, edward p. morris ,...
TRANSCRIPT
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Susana Flecha1, Edward P. Morris1, Jordi Figuerola2, Eduardo Costas3, Gabriel Navarro1,
Pablo Rodriguez1 and I. Emma Huertas1.
Spatio-temporal distribution of air-water CO2
exchange in Doñana wetlands (Spain)
1 2 3
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Contents
3. Results
4. Conclusions
2. Methodology
1. Introduction:
The CO2 problem
Study Area
5. Future outgoing
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1. Introduction: CO2 Problem
Gruber, Keeling and Bates (2002) Science
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1. Introduction: CO2 Problem
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1. Introduction: CO2 Problem
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1. Introduction: Study Area
Doñana N.P.
Doñana Natural P.
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1. Introduction : Relevance
Global ecological significance
•Declared UNESCO Biosphere Reserve (1981).
•World Heritage Site (1994).
•Listed under the Ramsar Wetland Convention.
•Habitat of the Iberian Lynx
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1. Introduction : Relevance
Socio-economic importance
•Important fishing activity in the Coastal area.
•Guadalquivir river, only navigable river in Spain.
•Touristic importance of the National park:~ 400000 visits per
year.
•Strong agriculture and aquaculture sectors in the natural park
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1. Introduction: Study Area
September 2008 FCO2 ( mmol m-2 d-1)
Huertas et al., (2006) Deep-Sea Res. II
Huertas et al., (2009) Biogeosciences
Flecha et al., (2011) Jour. Mar. Syst
de la paz et al., (2011) Aquat. Sci.
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Introduction: Study Area
Estuary
CO2 outgassing
Guadalquivir estuary:
High nutrients loads
Export of inorganic carbon to the
coastal area.
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Introduction: Study Area
Coastal Area
(Huertas et al. 2006)
Net sink of atmospheric CO2
High primary production with a strong
seasonality.
Net sink of CO2 on annual basis
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1. Introduction: Objective
Solve carbon cycle in Doñana aquatic compartiment and its relantionship with surrounding ecosystems
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Atlantic
Ocean
Iberian
Peninsula
2. Methodology: Doñana
Doñana N.P.
Doñana Natural P.
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2. Methodology: Doñana
M10
M11
M9
M8
M7
M6 M5
M1
M2 M3
M4
Monthly water sampling since December 2009
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2. Methodology: Doñana Water sources in Doñana
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2. Methodology: Doñana
SAMI
SAMI
SAMI
-SAMI pCO2
-CTD with DO, Fluorescence and Turbidity sensors
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3. Results: Monthly sampling
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3. Results: Monthly sampling
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3. Results: Monthly sampling
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3. Results: Monthly sampling
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3. Results: Monthly sampling
pCO2: calculated from pH and AT
using the dissociation constants from
Cai and Wang (2001).
FCO2: obtained using the gas
transfer parameterizations described
by:
Raymond and Cole (2001).
Carini et al.,(1996).
Clarck et al.,(1995).
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3. Results: Monthly sampling
Strong CO2 outgassing Small Source/ sink of atmospheric CO2
High nutrients
concentrations.
Strong primary
productivity
CO2 release
to the
atmosphere
OM export BACTERIAL
PRIMING?
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3. Results: pCO2 Time series
Santa Olalla:
Permanent shallow lake groundwater-feed.
Underground water :
Neutral pH values ~6.8
Moderate alkalinity ~1.66-2.26mEq L-1
Hypereutrophic system.
Average pH of 9 consequence of high primary production.
(López-Archilla et al., 2004)
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3. Results: pCO2 Time series
12 h 24 h
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3. Results: pCO2 Time series
pH
7.8
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
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3. Results: pCO2 Time series
pH
7.8
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
Late winter and spring pCO2 oversaturation
Dry conditions, variations in the groundwater supply.
Changes in the biological metabolism:
Temperature and salinity increase affected the biological
community.
Respiration exceeds primary production .
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Preliminar Conclusions
Monthly sampling data: Strong pCO2 source to the atmosphere depending of the water sources. High autotrophic production is actually associated with high annual emission of CO2: bacterial priming?
Sta. Olalla: Change from autotrophic to heterotrophic conditions related with changes in groundwater supply and temperature variations.
A further analysis with the carbon sediment storage is needed.
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4. Future Prospects Operational Model
Wind
O 2
Difusion
Residual
Current
SS
Marine influence
SALINITY
NH 4
DON
NO 3 Detrit .
Phyt .
Zoop .
CO2 2
Continental influence
DISCHARGES
O
CO2
5 10 15 20
500
1000
1500
2000
2500
3000
3500
4000
2
3
4
5
6
7
8
Simulations
Real/Simulated
Tim
e
Dam Broa
Ob
serv
ati
on
s
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4. Future Prospects
Hofmann et al., 2011 (Environ. Res. Lett.)
To analize this cycles in a future evolution context
pC
O2
Physical Pump Biological Pump
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Funding and Collaborations Contribución del compartimento acuático del Parque Nacional de
Doñana al intercambio de CO2 atmosférico
MARM2010-049 (1/1/2011 – 31/12/2013)
Estudio de los eventos de turbidez en la desembocadura del Guadalquivir mediante teledetección y su conexión con
procesos meteorológicos y oceanográficos. P09-RNM-4583 (3/2/2010 – 2/2/2014)
PR
OJE
CT
S
COLABORATIONS
Propuesta metodológica para diagnosticar y
pronosticar las consecuencias de las
actuaciones humanas en el estuario del Guadalquivir.
Propuesta metodológica para diagnosticar y pronosticar las consecuencias de las actuaciones humanas en el estuario del
Guadalquivir. A.P. Sevilla & Junta de Andalucía
ADAPTACION DEL FITOPLACTON TÓXICO AL CAMBIO GLOBAL:
CONSECUENCIAS EN EMBALSES DE ABASTECIMIENTO Y HUMEDALES
REFUGIO DE FAUNA SALVAJE
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3. Results: Doñana