Slides Ph D Xavier De Pedro 2007

Situacions d'anòxia en zones estuàriques sense forçament mareal ,[object Object],[object Object],[object Object],[object Object],[object Object]

Anoxic situations in estuarine zones without tidal forcing ,[object Object],[object Object],[object Object],[object Object],[object Object]

Anoxic events in estuarine zones without tidal forcing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Alfacs Bay Ebre River Delta

[object Object],ALFACS BAY (Ebro Delta, Spain) Length 13 Km Width 4 Km Surface 40x10 6 m 2 Mean Depth 3.13 m Max. Depth 6.5 m Anoxic events in estu ari ne zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos Waste Treatment Plant Town Sand Bar (= “ Alfac ”) MEDITERRANEAN SEA Alfacs Peninsula Rice Fields Brackish Lagoons FW Canals Salt Factory “ S1” “ S2” “ S3” Mussel platforms x x x “ Boca” “ Mig” “ Cua”

[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos “ S2” - Alfacs Bay

Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos “ OMMEL” O xygen M odel for M icrotidal E stuaries & L agoons + GPP Phytoplankton - Water column respiration + NPP macroalgae +/- Exchange with atm. +/- Transport (advection and exchange) - Sediment & benthic fauna respiration Conceptual Framework - DO > 150% sat. 0 2km { DO = o.m.

Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phy-Chemistry & Meteor. 5. Benthos ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phy-Chemistry & Meteor. 5. Benthos

[object Object],[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos S1 S2 S3 S1 S2 S3 “ S2” Sal. (psu) Temp. (ºC) DO. (mgO 2 l -1 )

Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos ,[object Object],[object Object],(A) through all net diel changes (B) through net diel changes minus “physics” average pp_chla (net) = 38 mgO 2 mgChla -1 h -1 DO (mg l -1 ) days “ Net diel change”

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos

[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos

Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4. Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos ,[object Object],[object Object],[object Object],upper layer

[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos Caulerpa prolifera Alsidium corallinum 1986 1997-Spring ,[object Object]

Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos

[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos K b =0,00274 m 2 gPS -1 Experiment: 5 Light level and 5 Biomass simulations

[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos Hurricane Bob (USA) (Peckol & Rivers 1995)

[object Object],[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen Budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5. Benthos

Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5 . Benthos ,[object Object],[object Object],[object Object],[object Object],[object Object],DO upp. mgO 2 l -1 DO low. mgO 2 l -1

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5 . Benthos S2 S3 o.m. in sediment (Palacin 1990)

Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5 . Benthos Annually averaged budget: 26.5 mgO 2 m -2 d -1 Net biological production: 326 gC m -2 y -1 “mesotrophic – eutrophic”; (Nixon 1995)

[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5 . Benthos

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5 . Benthos

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5 . Benthos

[object Object],[object Object],[object Object],Anoxic events in estuarine zones without tidal forcing 0. Introduction 3. Hypoxic episode in 1997 6. Oxygen budgets 1. Hydrodynamics 4 . Water column 7. Conclusions 2. Phys.-Chemistry & Meteorology 5 . Benthos

Acknowledgements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],And thanks to many many more... ;-) See: http://gclub.ub.es/xdp07

Slides Ph D Xavier De Pedro 2007

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Slides Ph D Xavier De Pedro 2007