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Impacts of Multiple Stressors on Water Quality in Saginaw Bay. Juli Dyble , Gary Fahnenstiel , Tom Nalepa , Hank Vanderploeg NOAA Great Lakes Environmental Research Lab Tom Johengen CILER Scott Peacor , Dianna Dziekan , Kim Peters Michigan State University - PowerPoint PPT Presentation
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Impacts of Multiple Stressors on Water Quality in Saginaw Bay
Juli Dyble, Gary Fahnenstiel, Tom Nalepa, Hank Vanderploeg NOAA Great Lakes Environmental Research Lab
Tom JohengenCILER
Scott Peacor, Dianna Dziekan, Kim PetersMichigan State University
Steve Francoeur Donna Kashian Eastern Michigan University Wayne State University
Jim Bredin, Bruce Walker Joe Depinto Michigan DEQ LimnoTech
Peter Lavrentyev Dave Millie University of Akron Florida Institute of Oceanography
2008• 3 monthly surveys (May, July, Sept)• 10 inner bay, 3 outer bay stations • 5 Master stations (surface and bottom)
2009• 6 monthly surveys (May – Oct)• 10 inner bay, 3 outer bay stations, 2 water intakes• 5 Master stations (surface and bottom)
2010 • 6 monthly surveys (May – Oct)• 10 inner bay, 1 outer bay stations, 2 water intakes• 5 Master stations (surface and bottom)
Samples collected
Sampling stations
Blue: Master (5) Red: Basic (8)
Water utility intakes
Physical • CTD: temperature, conductivity, PAR, transmittance, DO• Secchi depth
Chemical• total P, SRP, TDP, particulate CN, DOC, NO3, NH4, SiO2, Cl• TSS, VSS
Phytoplankton• chl a• phytoplankton cell counts• phytoplankton groups for algal pigments (HPLC)• Microcystis and microcystin (master stations and water intakes)
Zooplankton and microzooplankton• vertical tows w/ 64 um net (master stations)• oblique tows for larger bodied zooplankton (master stations)• whole samples in lugols and formalin (to Peter Lavrentyev)
Parameters measured
Physical • CTD (temp, PAR, DO, Chl and PC fluorescence) – downloaded • Secchi depth - logged
Chemical• total P, SRP, TDP, NO3, NH4, SiO2, Cl – 2008, 2009, 2010• particulate CN - 2008, 2009 (2010 in process)• DOC – 2008, 2009, 2010• TSS, VSS – 2009, 2010
Phytoplankton• chl a - 2008, 2009, 2010• phytoplankton cell counts – 2008, 2010 (2009 likely not available)• phytoplankton groups for algal pigments (HPLC) – not done• Microcystis and microcystin – (2010 in process)
Zooplankton and microzooplankton• vertical tows w/ 64 um net (master stations) – 2009 (2010 in process)• oblique tows for larger bodied zooplankton (master stations) • whole samples in lugols and formalin (to Peter Lavrentyev)
Status of sample processing
Avg surface temp (2008-2010)
May Jul Sept0
5
10
15
20
25
30SB 2
200820092010
tem
p (°C
)
May Jul Sept0
5
10
15
20
25
30 SB 5
200820092010
tem
p (°C
)
May Jul Sept0
5
10
15
20
25SB 10
200820092010
tem
p (°C
)
May Jul Sept0
5
10
15
20
25SB 20
200820092010
tem
p (°C
)
SB2
SB5
SB14
SB10
SB20
Average yearly TP (2008-2010)
May June Jul Aug Sept Oct0
10
20
30
40
50
60
SB2
SB5
SB10
SB14
SB20
TP (u
g/L)
Driven by 2010values
Driven by 2009values
SB2
SB5
SB14
SB10
SB20
Average yearly chl a (2008-2010)SB2
SB5
SB14
SB10
SB20
May June Jul Aug Sept Oct0
5
10
15
20
25
30
35SB2SB5SB10SB14SB20
chl a
(ug/
L)
Proposed chla resulting from 15 ug P/L in Saginaw Bay, 1979 P mgmt strategies workshop
3.6 ug/L
Chl a vs TP
R2 = 0.6645
R2 = 0.4214
R2 = 0.5982
Phyto community analysis – 2008(% of total biovolume)
SB2
SB5SB14
SB10
SB20
SB2
May 08
July 08
Sept 08
Bacillariophyta
Chlorophyta
Cryptophyta
Cyanobacteria
Chrysophyta
SB5 SB14
Phyto community analysis – 2008(% of total biovolume)
SB2
SB5SB14
SB10
SB20
SB10
May 08
July 08
Sept 08
SB20BacillariophytaChlorophytaCryptophytaChrysophytaCyanobacteria
Many Thanks to:
Ashley BurtnerDanna PalladinoDuane Gossiaux
Nancy MoreheadJoann CavalettoDave Fanslow
Steve ConstantLee Wyrobek
Dennis DonahueAndrew Yagiela
Mike TaetschTom Joyce
Jack Workman