Diapositivo 1

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Chícharo, L. Chícharo, M. A, Ben-Hamadou, R.
(2006). Use of a hydrotechnical infrastructure
(Alqueva Dam) to regulate planktonic assemblages
in the Guadiana estuary basis for sustainable
water and ecosystem services management.
Estuarine Coastal and Shelf Science Volume 70,
Issues 1-23-18
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EVIDENCES OF DECREASE VARIABILITY OF WATER
PARAMETERS IN GUADIANA ESTUARY AFTER ALQUEVA DAM
CONSTRUCTION
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Chícharo et al. (in press). Application and
demonstration of the Ecohydrology approach for
the sustainable functioning of the Guadiana
estuary (South Portugal) Ecohydrology
Hydrobiology
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Chícharo et al. (in press). Application and
demonstration of the Ecohydrology approach for
the sustainable functioning of the Guadiana
estuary (South Portugal) Ecohydrology
Hydrobiology
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Light trap and fish larvae length
GUDIARIA PROJECT

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Sardine larvae in the Guadiana Estuary?
zooplankton net - 4.9 2.0 mm (include recently
hatched larvae) otter trawl - 32,90 2.0 mm
St. 5 - otter trawl
zooplankton net

• sardine larvae collected in St. 5 (February
  2003) were undoubtedly
• older than those collected in the terminal area
  of the estuary

• active migration to that location has to be
  considered

• passive transport of plankton is not supposed to
  achieve such a
• distance, from st. 3 or st. 4 till st. 5 during
  higher inflow periods

Morais et al. 2003
in opposition to what have been assumed for
estuaries in general, the presence of sardine
larvae in the Guadiana estuary, seems to be
non-accidental
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Hydrotechnical regulation of biota-hydrology EH
SOLUTIONS FOR EUTROPHICATION AND TOXIC ALGAE
BLOOMS CONTROL RESIDENCE TIME FRESHWATER
PULSES (Guadiana estuary PORTUGAL)
Chicharo et al 2006
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Hydrotechnical regulation of biota-hydrology EH
SOLUTIONS FRESHWATER DISCHARGE TO SUSTAIN FISH
AND BIVALVE ASSEMBLAGES IN COASTAL ZONE
(Guadiana area PORTUGAL)
NAO?
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Hydrotechnical regulation of biota-hydrology
FRESHWATER DISCHARGE SUSTAINED SARDINE
LARVAE FOOD AND SURVIVAL (North Atlantic Coast
PORTUGAL/SPAIN)
Interaction river plume and upwelling extending
high food availability until oceanic waters
VERTICAL DISTRIBUTION OF SALINITY DURING A WINTER
UPWELLING EVENT OFF NORTHERN PORTUGAL. THICK
SOLID LINE REPRESENTS THE WESTERN IBERIAN BUOYANT
PLUME (WIBP), THAT OVER THE SHELF, ACCUMULATED
RIVER RUNOFF WITH HIGH VALUES OF CHLOROPHYLL AND
GENERATES A PERSISTENT BUOYANT PLUME (Chicharo
et al 2003)
Null starvation High RNA/DNA ratios in
sardine larvae