NCP ( mmol O 2 m -2 d -1 )

nov dic ene feb mar abr may jun jul ago sep oct nov dic 0

2 d-1)

NET ECOSYSTEM METABOLISM IN THE NW IBERIAN UPWELLING SYSTEM

ON AN ANNUAL CYCLE

C.G.Castro, Arbones B, Alvarez-Salgado XA, Alonso-Pérez F, Froján M, Zúñiga D, Teixeira IG, and Figueiras FG

Instituto de Investigaciones Marinas (CSIC)

The 45th International Liège Colloquium13th – 17th May 2013

Aristegui

Arístegui et al. 2009

CAIBEX: Shelf –ocean exchanges in the Canaries- Iberian LargeMarine Ecosystem

Background

Northern boundary of the Canary Current upwelling system

Seasonal variation: Upwelling: April to SeptemberDownwelling: October to March

Ex(103 m3 s-1 Km-1)

-0.6-0.30.00.30.6

DNOSAJJM

Upwelling index (1987-2004)

Courtesy of RMS from PML

UPWELLING

Background

DOWNWELLING

Upwelling index (103 m3 s-1 Km-1)

Background

High rates of primary production during the upwelling period (2.5 g C m-2 d-1), dominated by large – sized diatoms (Varela et al., 1991; Teira et al., 2001; Figueiras et al., 2001; Tilstone et al., 2003)

Espinoza et al. 2012

Objectives

To study the fate of fixed carbon based on direct measurements of

gross primary production, pelagic respiration and vertical export of

organic matter and explore the linkage between Production /

Respiration balance and size structure and composition of the

microbial plankton community.

Methods

SEAWATER SAMPLES for:

-Nutrients-Size –fractionated chlorophyll (0.2, 2, & 20 µm)-Pico-, Nano- and Microplankton biomass

Net Community Production (NCP) and Community Respiration (CR) by in situ 24 ligh-dark bottle oxygen incubations

Net primary production by in situ 24 incubations of C14

Bacterial production by leucine uptake

Vertical fluxes of organic carbon by in situ 24h deployment of a multitrap

2008 2009

Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec70

-10000

Hydrographic conditionsResults

2008 2009

nov dic ene feb mar abr may jun jul ago sep oct nov dic

0.00.20.40.60.81.0

nov dic ene feb mar abr may jun jul ago sep oct nov dic

0.00.20.40.60.81.0

2008 2009

>20 μm >2 μm >0.2 μm

Results

Microbial plankton biomass

nov mar jul nov 0

6000Autotrophic carbonHeterotrophic carbon

2008 2009

Pico- Nano- Micro-

Results

Production / respiration balance

2 m-3d-1

m-3d-1

2008 2009

Results

2008 2009

Vertical Carbon FluxesVe

Organic carbonPhytoplanktonic carbonDiatom carbon

Results

2 d-1)

2 m-2d-1

2 d-1)

Conclusions

4210.5

NCP (g C m-2 d-1) A

0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0% M i c r o p l a n c t o n

Conclusions

NCP 0.5 ±0.5

Respiration0.5 ±0.3

Carbon flux0.29 ±0.02

DOWNWELLING SEASON

NCP 2.1 ±2.0

Carbon flux0.4 ±0.2

UPWELLING SEASON

tic zo

Conclusions

g C m-2 d-1

Thank you for your attention

NCP ( mmol O 2 m -2 d -1 )

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Transcript of NCP ( mmol O 2 m -2 d -1 )

LE DISLIPIDEMIE. RISULTATI DELLO STUDIO BOTNIA Pazienti HbA 1C, % HOMA IR Trigliceridi, mmol/l Colesterolo, mmol/l LDL-col, mmol/l HDL-col, mmol/l 1988.

Supplementary Materials for · THF (28 ml) were added phthalimide 2 (2.3g, 15.69 mmol) and PPh 3 (4.11g, 15.69 mmol). DEAD (2.73 g, 15.69 mmol) was then added dropwise to the stirred

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Calculs et conversion d’unités - HUG...mEq = mmol ×××charge ionique Ex: 1 mEq Na+ = 1 mmol de Na+ 2 mEq Ca++ = 1 mmol de Ca++ 3 mEq PO 4- - - = 1 mmol de PO4- - - MILLIMOLES