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8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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GLIDER MEASUREMNETS OFPHYTOPLANKTON PHYSIOLOGY
IN PALMER DEEP
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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What can a physiology approach tell usabout the Palmer deep populations?
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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Photosynthesis = PAR * aph *
φ
a ph =
a(l )* Eo(l )dl400nm
700nm
ò
Eo(l )dl400nm
700nm
ò
Spectrally averagedabsorption
Energy that is into the cellVaries cell pigmentation, lighthistory,
and size
~ 1%
)()()(
λ λ λ
d d
d E K
dz
dE −=
0.
00
0.
20
0.
40
0.
60
0.
80
1.
00
Irradiance
0
.0020.
00
40.00
60.00
80.00
100.00
D e p t h ( m )
Scalar visible
irradiance
Energy into the oceanVaries with depth according to the IOPsIOPs with radiative transfer eqns describe
the AOPS
Efficiency of converting energyintoEnd product (electrons, oxygen,
carbon)Varies with end product andh siolo
Quantum efficiency of ……..
H i g h
L o w
Absorpti
on
Fluorescence
or chargeseparation
oxygen
carbonfixation
growth
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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F 0 = a ph ×F II ×PAR×k f
k f + k d + k p
F m = a ph ×F II ×PAR× k f k f + k d
F m - F 0F m
=k p
k f + k d + k p
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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D e p t h
( m )
0
100
-64.8
-64.95
Latitude
-64.4
-63.9
Longitude
Temperature
(Celsius)
-0.6
-0.4
0.8
1.0
Deep Canyon
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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D e p t
h ( m )
0
100
-64.8
-64.95
Latitude
-64.4
-63.9
Longitude
Salinity33.4 33.6 34.2 34.4
Deep Canyon
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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Maximum quantum yield(Fv/Fm)
0 0.1
0.6
0.7
D e p t h
( m )
0
100
-64.4
-63.9
Longitude
-64.8
-64.95
Latitude
Deep Canyon
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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D e p t h
( m )
0
100
Fluorescence-zero(volts)
0 5 20
25
-64.4
-63.9
Longitude
-64.8
-64.95
Latitude
Deep Canyon
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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Time
F l u o r e s c e n
c e r i s e
Integrated area isreflection of the absorption
cross-section
Flash is on RC2
Highlightcells
Lowlightcells
Photo-acclimation
Photons
Other useful indicesFLUORESCENCE INDUCTION
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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Longitude-64.4
-63.9
-64.8
-64.95
Latitude
D e p t h ( m
)
0
100
Sigma PSII50 350
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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14C
Fl
Based on Moline et al. 1998
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 3 5 00 .0 0 5
0 .0 2 5
0 .0 4 5
0 .0 6 5
0 .0 8 5
0 .1 0 5
0 .1 2 5
1
2
3
45
6
7
8 9
10
11
12
13
14
1516
171819
20
21
22
23
New Jersey Coastal Region22
Southern California Bight
21
NW Atlantic Continental Shelf (Spring)
20
Gulf Stream (Spring)19 NW Atlantic Subtropical Gyre(Spring)
1
8
NE Atlantic Subtropical Gyre
(Spring)
17
Canary Islands (Spring)
16
NW Atlantic Continental Shelf (Fall)
15
Gulf Stream (Fall)
14
NW Atlantic Subtropical Gyre(Fall)
13
NE Atlantic Subtropical Gyre(Fall)
12
Canary Islands (Fall)
11
Antarctic (Palmer Station)
10
Antarctic (Transitional WeddellWater)
9 Antarctic (BellingshausenWarm water)
8 Antarctic (Bellingshausen Coldwater)
7
Arabian Sea (NE Monsoon)
6
Arabian Sea (Inter Monsoon)
5
Arabian Sea (SW Monsoon)
432
1
Antarctic (Bransfield-Bellingshausen water)Antarctic (Bransfield-Weddellwater)Antarctic (Ice-Edge water)
Antarctic (Weddell-ScotiaConfluence waters)
23
Ek(PAR) (μmolphotons m-2 s-1)
φ m a x ( m o
l C m o l p h o t o n s
a b s o r b e d - 1 )
Rough seas
Oligotrohicseas
Antarctic
8/3/2019 Glider Measurments of Phytoplankton Physiology in Palmer Deep
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CONCLUSIONS
There is spatial variability in the biomass and the physiology
Healthiest phytoplankton are found at the edge of the canyon associatedwith the warmer bottom temperatures
Populations appear to dark light adapted
Photosystem II saturates earlier than carbon fixation
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