DFO Lakes Research Program SLIPP WQ PAC Workshop 12-April-2012
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Transcript of DFO Lakes Research Program SLIPP WQ PAC Workshop 12-April-2012
DFO’s Lakes Research Program
• Historical Limnological & Fisheries Research and Monitoring § 1987-1993 – Shuswap and Mara Lakes
(Nidle & Shortreed 1996, Morton and Shortreed 1996)
§ 2007-2008 – Mabel Lake § 2008 – Little Shuswap Lake § 2011 – Shuswap and Mara Lakes
Shuswap Lakes DFO Deep Stations 2011
Salmon Arm
Main Arm
Mara Lake
Shuswap Lake
Seymour Arm
Anstey Arm
L. Shuswap Lake
Pho
tosy
nthe
tic R
ate
(mg
C/m
2 /d)
0
50
100
150
200
250
300
1988 1989 1991 2011
Shuswap Lake Whole Lake Seasonal Mean Photosynthetic Rate
Whole Lake
Fisheries and Oceans Canada, Science Branch, D.T. Selbie unpublished data
1988 1989 1991 2011
Pho
tosy
nthe
tic R
ate
(mg
C/m
2 /d)
0
50
100
150
200
250
300
Pho
tosy
nthe
tic R
ate
(mg
C/m
2 /d)
0
50
100
150
200
250
300
Pho
tosy
nthe
tic R
ate
(mg
C/m
2 /d)
0
50
100
150
200
250
300
Pho
tosy
nthe
tic R
ate
(mg
C/m
2 /d)
0
50
100
150
200
250
300
Main Arm Seymour Arm
Anstey Arm Salmon Arm
Shuswap Lake Arm-Specific Seasonal Mean Photosynthetic Rates
1988 1989 1991 2011
10,583 salmon/km2
2,437 salmon/km2
4,494 salmon/km2
10,649 salmon/km2
Fisheries and Oceans Canada, Science Branch, D.T. Selbie unpublished data
Mara Lake Whole Lake Seasonal Mean Photosynthetic Rates
Pho
tosy
nthe
tic R
ate
(mg
C/m
2 /d)
0
50
100
150
200
250
300
2011 1987
1,689 salmon/km2 Mara Lake
Fisheries and Oceans Canada, Science Branch, D.T. Selbie unpublished data
1987 1988 1989 1991 20110
50
100
150
200
250
300
0
50
100
150
200
250
300
0
50
100
150
200
250
300
Shuswap Lake Arm-Specific Seasonal Mean Size-Fractionated Photosynthetic Rates
Seas
onal
Mea
n Ph
otos
ynth
etic
Rate
(mgC
/m2/
yr)
Fisheries and Oceans Canada, Science Branch, D.T. Selbie unpublished data
Main Arm
Seymour Arm
Salmon Arm
Microplankton PR (>20µm)
Nanoplankton PR (>2 µm <20µm)
Picoplankton PR (>2 µm <20µm)
Year
Fraser Basin Sockeye Nursery Lakes Comparison of Seasonal Mean Photosynthetic Rates
Fisheries and Oceans Canada, Science Branch, Modified from J.H. Hume et al in prep
0
50
100
150
200
250
300
350
400
450Cultus
Fraser
Anderson
Kamloops
Seton
Mabel
Shuswap
Francois
Lillooet
Stuart
Bowron
Quesnel
Harrison
Chilliwack
Chilko
Trembleur
Takla
Lake
Seas
onal
Mea
n Ph
otos
ynth
etic
Rat
e (m
gC/m
2/d)
