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Solar Radia*on and stra*fica*on main drivers in microbial produc*on in Patagonian Fjords?
Klaudia Hernández a , Beatriz Yannicelli b , Fernanda Cornejo-‐Acevedo a, Lasse Olsen c ,& Jl Iriarte d
InsAtuto de Ciencias Marinas y Limnológicas Universidad Austral de Chile (UACH ), Chile; CEAZA, Centro de Estudios Avanzados de Zonas Aridas, Coquimbo Chile; NTNU, Norwegian University of Science & Technology , Trondheim; Inst. Acuic. UACH, Chile
To evaluate the effect of effect spectral solar radia;on, nutrients and stra;fica;on on primary produc;on of a Northen Patagonia Bord Comau during summer and winter 2013
230 250 270 290 310 330 350 370 390
1/1/12
3/1/12
4/30/12
6/29/12
8/28/12
10/27/12
12/26/12
2/24/13
4/25/13
6/24/13
8/23/13 St
ratosphe
ric O
3 (DU)
Loca*on Summer Winter Sensor References PAR PAR W/m2 W/m2
Arica 457 370 BSI Hernández et al (2012)
San*ago 435 174 BSI Concepcion 520 425 BSI Puerto MonW 435 261 BSI Punta Arenas 435 174 BSI Al*plano 1000 600 Aceituno 1998
Salar de Huasco (4500 m s.n.m) 1979 912 Apogee
Hernández unpublished data
Our mo;va;on In the chilean northen patagonian Bords , the changes on microbial produc;vity had been related to solar radia;on radiaAon, water column straAficaAon and nutrients influx from freshwater runoff. During spring-‐summer high autotrophic biomass dominated by large cells and in winter lower autotrophic biomass dominated by small cells sustain the primary producAon. Nevertheless, the seasonal variability of solar radiaAon and its synopAc effects on the producAvity has not been assessed directly.
Obje;ve
Light Characteriza;on @ Comau Fjord North chilean Patagonia
a) Light distribu*on along Chilean coast e) O3 at P.MonW (GUV 511C *me series)
F Rio Vodudahue
A
B
C
D E
Rio Huinay
Puerto MonW (Fiordo Comau)
0.0 0.8 1.5 2.3 3.0 3.8 4.5 5.3 6.0 6.8 7.5
0 75
150 225 300 375 450 525 600 675 750
1-‐Jan-‐12
4-‐Mar-‐12
3-‐May-‐12
6-‐Jul-‐1
2
2012-‐09-‐05
2012-‐11-‐08
2013-‐01-‐07
2013-‐03-‐08
2013-‐05-‐07
2013-‐07-‐08
2013-‐09-‐06
MAX
UVB
(W
/m2 )
MAX
PA
R /U
VA ( W
/m2 ) MAX PAR
MAX UVA MAX UVB
h[p://gdata1.sci.gsfc.nasa.gov/daac-‐bin/G3/results.cgi
b) Study area and sta*ons
Table 1. Referencial Maximum solar radia*on along Chile (Hernández et al., 2012)
d) Solar radia*on *me series at P.MonW (GUV 511C *me series)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
4/10/11
8/8/11
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12/11/11
2/9/12
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8/7/12
10/6/12
12/5/12
2/3/13
4/4/13
6/3/13
8/2/13
UV INDEX 2011-‐2013 GUV511C
c) Study area and sta*ons
Unexpected synop;c varia;on in primary produc;on, lower in Summer vs Winter 2013!!
Acknowledgements : This KLH research was part of funding by Fondecyt 11110190 project of the naBonal council of Science in Chile CONICYT
StaAon C Summer
StaAon C Winter
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Chlorophyll (mg m-‐3)
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0 0.1 0.2 0
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0 15 30 0
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0.E+00 1.E+05 2.E+05 0
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0 1 2
BSP (µg C l h-‐1)
NITRITE
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0 0.1 0.2
µM Primary Prod (mg C L-‐1 h-‐1) µM
PHOSPHATE µM
Cél ml -‐1
SINECOCOCUS PICOEUKARIONTS
SILICATE NITRATE
Temperature °C
Salinity
5 15 25 350
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1% PAR
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0 10 20 0
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0.E+00 2.E+03 4.E+03 0
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0 0.1 0.2 0
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5 15 250
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5 15 25 350
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1% PAR
788
To take home… SynopBc variability of solar radiaBon, temperature and straBficaBon on the top 50 m of the water column in northern patagonian Mords lead to unexpected verBcal paOerns of biological producBon contrasBng with thec clasic seasonal varibility observed in this zones .
