Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton...
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![Page 1: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/1.jpg)
Organic Matter Metabolism in a Coastal Ocean Ecosystem
Patricia MatraiMike SierackiNicole Poulton
Carlton Rauschenberg
Bigelow Laboratoryfor Ocean Sciences
W. Boothbay HarborMaine
NASA OCRT 4/11-13/06 Newport, RI
![Page 2: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/2.jpg)
In Collaboration with: University of New Hampshire
Center for Coastal Ocean Observation and Analysis
Janet CampbellJoe Salisbury
![Page 3: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/3.jpg)
Talk outline
•Project objectives
•Study site and measurements
•Some first year results
•Respiration models
•Preliminary remote sensing results
•Conclusions
![Page 4: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/4.jpg)
Project Objectives•Primary Objectives:
•Can microbial respiration be modeled by temperature, chlorophyll, primary production, and DOM?
•If so, how well can surface water respiration be estimated by satellite remote sensing?
•Secondary Objectives:•What is the balance of planktonic microbial respiration to primary production in a river plume system?
•How does planktonic food web structure relate to the system metabolic balance?
![Page 5: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/5.jpg)
Gulf of Maine Primary Study Area
(GoMOOS C)
(GoMOOS B)
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Study Methods• Monthly cruises from Kennebec River (Bath,
Maine) to Portsmouth, NH• 5 Stations, surface samples• Respiration (24h O2 incubations)• Primary production (12h 14C incubations)• Microplankton and particle analysis
• FlowCAM, flow cytometry, microscopy• Size spectra, 0.2 - >200 µm
• Chlorophyll, T, S, TOC, POC, ∆13C, nutrients
• Bacterial single-cell respiration (CTC)
![Page 7: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/7.jpg)
Temperature and Salinity
0
5
10
15
20
25
Feb-05 Mar-05 May-05 Jun-05 Jul-05 Sep-05 Oct-05 Dec-05
Tem
pera
ture
°C
Stn1
Stn2
Stn3
Stn4
Stn5
Temperature pattern similar at all stations
River and plume stations show spring and fall runoff peaks (low salinity)
0
5
10
15
20
25
30
35
Feb- 05 Mar- 05 May- 05 J un- 05 J ul- 05 Sep- 05 Oct- 05 Dec- 05
Salin
ity p
su
Stn1
Stn2
Stn3
Stn4
Stn5
![Page 8: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/8.jpg)
Bacteria and <20µm Phytoplankton Abundances
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
Feb-05 Mar-05 May-05 J un-05 J ul-05 Sep-05 Oct-05 Dec-05
Tota
l Euks (
mL-1
)
Stn1Stn2Stn3Stn4Stn5
0
50000
100000
150000
200000
250000
Feb-05 Mar-05 May-05 J un-05 J ul-05 Sep-05 Oct-05 Dec-05
Synechococcus (
mL-1
)
Stn1Stn2Stn3Stn4Stn5
0
500000
1000000
1500000
2000000
2500000
3000000
3500000
4000000
Feb-05 Mar-05 May-05 J un-05 J ul-05 Sep-05 Oct-05 Dec-05
Bacte
ria (
mL-1
)
Stn1Stn2Stn3Stn4Stn5
Eukaryotes
Synechococcus
HeterotrophicBacteria
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Microphytoplankton Abundance(15 - 200 µm, FlowCAM)
Apr Jun Oct Dec
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0
1
2
3
4
5
6
7
Feb-05 Mar-05 May-05 Jun-05 Jul-05 Sep-05 Oct-05 Dec-05
Chl
orop
hyll
ug/L
Stn1Stn2Stn3Stn4Stn5
0
100
200
300
400
500
600
700
800
Feb-05 Mar-05 May-05 Jun-05 Jul-05 Sep-05 Oct-05 Dec-05
Prim
ary
Prod
uctio
n ug
C/L
/d
Stn1Stn2Stn3Stn4Stn5
Chl
1° Prod
0
20
40
60
80
100
120
140
160
Feb-05 Mar-05 May-05 Jun-05 Jul-05 Sep-05 Oct-05 Dec-05
Mic
robi
al R
espi
ratio
n Ra
te m
l O2
/L /
d
Stn1
Stn2
Stn3
Stn4
Stn5
Seasonal Trends in Chlorophyll, Primary Production, and Respiration
Resp
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Chl
1° Prod
Resp
Seasonal Trends in POC, Nutrients, and δ 13C/12C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Feb-05 Mar-05 May-05 Jun-05 Jul-05 Sep-05 Oct-05 Dec-05
PO
C u
g/
L
Stn1
Stn2
Stn3
Stn4
Stn5
POC
-32.0
-30.0
-28.0
-26.0
-24.0
-22.0
-20.0
Feb-05 Mar-05 May-05 Jun-05 Jul-05 Sep-05 Oct-05 Dec-05
δ1
3/C
12C
Stn1
Stn2
Stn3
Stn4
Stn5
δ 13C/12C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
Feb-05 Mar-05 May-05 J un-05 J ul-05 Sep-05 Oct-05 Dec-05
PO4u
M
Stn1
Stn2
Stn3
Stn4
Stn5
PO4
0
1
2
3
4
5
6
7
8
9
10
Feb-05 Mar-05 May-05 Jun-05 Jul-05 Sep-05 Oct-05 Dec-05
NO
3 +
NO
2
uM
Stn1
Stn2
Stn3
Stn4
Stn5
NO3 + NO2
![Page 12: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/12.jpg)
Annual Station Means
Downstream:Chlorophyll declines
1° Production declines
Respiration increases
0
1
2
3
1 2 3 4 5
Station
Mean C
hlo
rophyll
(µg/L
)
050
100150200250
1 2 3 4 5
Station
Prim
ary
Pro
duct
ion
(µgC
/L/d
)
0
2
4
6
8
1 2 3 4 5
Station
Mean R
esp
irati
on
rate
(µM
O2/d
)
River Coast
Chl
Resp
PP
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Surface respiration vs. primary production (µgC L-1
d-1)Primary production vs. respiration
-20
0
20
40
60
80
100
120
140
160
0 200 400 600 800
Primary production (µgC/L/d)
Resp
irati
on (
µgC
/L/d
)
1:1
Overall system mean:R is 30% of P
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Surface respiration vs. primary production (µgC L-1
d-1)Primary production vs. respiration
-20
0
20
40
60
80
100
120
140
160
0 200 400 600 800
Primary production (µgC/L/d)
Resp
irati
on (
µgC
/L/d
)
River + plumeAug, Sept
Spring bloomMay, June
1:1
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Ecosystem relationships
Cole et al. 1988, White et al. 1991, del Giorgio et al. 1997
Rivkin & Legendre 2001
Method #1 BA = f(Chl)
BR = f(BA, T)
Method #2 BP = f(BA, T)
BR = f(BP, T)
Method #3 BR = f(NPP)
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Example Gulf of Maine Respiration Images13 May 2005
SST CHL
BR1 (BA) BR2 (BP)
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Conclusions
• Kennebec River plume/Gulf of Maine system is dynamic, biologically rich, and productive
Primary production exceeds respiration most of the year, R was 30% of P for the whole system over 1 year.
Preliminary estimates of respiration from remote sensing data using ecosystem relationships are within an order of magnitude of in-water measurements, but further analysis and validation are needed.
![Page 18: Organic Matter Metabolism in a Coastal Ocean Ecosystem Patricia Matrai Mike Sieracki Nicole Poulton Carlton Rauschenberg Bigelow Laboratory for Ocean Sciences.](https://reader036.fdocuments.us/reader036/viewer/2022062516/56649d985503460f94a81ec9/html5/thumbnails/18.jpg)
And Thanks to:
Kay Kilpatrick, RSMAS, U. Miami
Ben Tupper, Bigelow LaboratoryPaul Pelletier, Capt. R/V Gulf ChallengerChris Hunt, Mike Novak, UNH Coastal Transect crew
Carbon Cycle Science