NCP ( mmol O 2 m -2 d -1 )
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nov dic ene feb m ar abr m ay jun jul ago sep oct nov dic 0 100 200 300 400 500 N C P ( m m o l O 2 m - 2 d - 1 ) B P ( m m o l C m 2 d - 1 ) nov dic ene feb m ar abr m ay jun jul ago sep oct nov dic 0 20 40 60 80 100 bacterialproduction prim ary production 0 20 40 60 80 100 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 45 th International Liège Colloquium 13 th – 17 th May 2013
description
The 45 th International Liège Colloquium 13 th – 17 th May 2013. 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 - PowerPoint PPT Presentation
Transcript of NCP ( mmol O 2 m -2 d -1 )
nov dic ene feb mar abr may jun jul ago sep oct nov dic 0
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P (m
mol
O2 m
-2d-1
)BP
(m
mol
C m
2 d-1)
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bact
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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
ME
S
AMFE
DNOSAJJM
MON
TH
Upwelling index (1987-2004)
Courtesy of RMS from PML
UPWELLING
Background
Courtesy of RMS from PML
DOWNWELLING
Upwelling index (103 m3 s-1 Km-1)
E
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
Courtesy of RMS from PML
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
Tem
pera
ture
(°
C)Ni
trate
(µm
ol k
g-1)
2008 2009
Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec70
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30
10
dept
h (m)
Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec70
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30
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dept
h (m
)
Upwe
lling
inde
x(m
3 s-1
Km
-1)
-10000
-5000
0
5000
10000
Hydrographic conditionsResults
2008 2009
Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec70
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30
10
dept
h (m
)
Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec70
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30
10
dept
h (m
)
Tota
l chl
orop
hyll
a (m
g m
-3)
Prim
ary
p rod
uctio
n(m
g m
-3 d-
1 )
nov dic ene feb mar abr may jun jul ago sep oct nov dic
Perc
enta
ge ch
l a
0.00.20.40.60.81.0
nov dic ene feb mar abr may jun jul ago sep oct nov dic
Perc
enta
ge P
P
0.00.20.40.60.81.0
2008 2009
>20 μm >2 μm >0.2 μm
57%
76%
32%
32%
Results
Microbial plankton biomass
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100
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2000
4000
6000Autotrophic carbonHeterotrophic carbon
Inte
grat
ed b
iom
ass
(mg
C m
-2)
Size
cla
ssCo
ntrib
uti o
n (%
)
2008 2009
Pico- Nano- Micro-
Results
Production / respiration balance
NCP
(mm
ol O
2 m-3d-1
)CR
(m
mol
O2 m
-3d-1
)BP
(m
g C
m-3d-1
)
Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec70
50
30
10
dept
h (m
)
Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec70
50
30
10
dept
h (m
)
Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec70
50
30
10
dept
h (m
)
2008 2009
Results
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2008 2009
Vertical Carbon FluxesVe
rtica
l Car
bon
F lux
es(m
g C
m2 d
-1)
Organic carbonPhytoplanktonic carbonDiatom carbon
Results
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500NC
P (m
mol
O2 m
-2d-1
)BP
(m
mol
C m
2 d-1)
nov dic ene feb mar abr may jun jul ago sep oct nov dic 0
20
40
60
80
100
bact
erial
pro
duct
ion
prim
ary p
rodu
ction
0
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NCP
(mm
ol O
2 m-2d-1
)BP
(m
mol
C m
2 d-1)
nov dic ene feb mar abr may jun jul ago sep oct nov dic 0
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Conclusions
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6
0
4210.5
NCP (g C m-2 d-1) A
utot
roph
ic bi
omas
sHe
tero
troph
ic bi
omas
s
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
0 . 5
1 . 0
1 . 5
2 . 0
2 . 5
Conclusions
NCP 0.5 ±0.5
Respiration0.5 ±0.3
Respiration0.07 ±0.03
Carbon flux0.29 ±0.02
DOWNWELLING SEASON
58%
50%
24%
NCP 2.1 ±2.0
Respiration0.9 ±1.0
Respiration0.2 ±0.1
Carbon flux0.4 ±0.2
UPWELLING SEASON
apho
tic zo
neph
otic
zone
19%
70%
50%
Conclusions
g C m-2 d-1
Thank you for your attention
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