golden alga (prymnesium parvum ) salt river lakes marc dahlberg water quality program manager march...

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Golden Alga (Prymnesium parvum) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

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Page 1: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Golden Alga (Prymnesium parvum) Salt River Lakes

Marc Dahlberg Water Quality Program Manager

March 8, 2011

Page 2: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Golden Alga Temperature range between 5 and 30

degrees Celsius Blooms occur when nutrients are readily

available. When nutrients become depleted toxins are

released. The potency of the Golden alga is nearly

five times greater at a pH 8.5 than it is at 6.5.

Cells are very fragile and are easily ruptured Prefers a saline environment – does very

well in waters with conductivities over 2000 µmhos/cm

Page 3: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Diagnostic Features

8 – 11 microns long

3 – 6 microns wide Nucleus is located

centrally between two chloroplasts

2 equal flagella and a well developed heptonema

Page 4: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Conductivity Saguaro - Canyon – Apache - Roosevelt

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

0

500

1000

1500

2000

2500

3000

Saguaro Canyon Apache Roosevelt

Year

Conduct

ivit

y (

µm

hos/

cm)

Page 5: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Conductivity Saguaro - Canyon - Apache

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

0

500

1000

1500

2000

2500

Saguaro Canyon ApacheConduct

ivit

y (

µm

hos/

cm)

Page 6: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Average Conductivity Saguaro - Canyon - Apache

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

0

500

1000

1500

2000

2500

Year

Conduct

ivit

y

(µm

hos/

cm)

Page 7: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Average Conductivity Saguaro - Canyon - Apache

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

0

500

1000

1500

2000

2500

Year

Conduct

ivit

y

(µm

hos/

cm)

Corb

ic-

ula

Rod

eo -

C

hed

iski

Th

read

fin

sh

ad A

ll

sp

ecie

s

All

sp

ecie

s

Th

read

fin

sh

ad

Th

read

fin

sh

ad

Page 8: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Average Conductivity Salt River Lakes (Saguaro-Canyon-Apache) and Salt River below Saguaro

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

0

500

1000

1500

2000

2500

Lakes Salt River

Year

Conduct

ivit

y (

µm

hos/

cm)

Page 9: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Conductivity Comparison

1951

1954

1957

1960

1963

1966

1969

1972

1975

1978

1981

1984

1987

1990

1993

1996

1999

2002

2005

2008

2011

0

500

1000

1500

2000

2500

Salt River Below Saguaro Average Saguaro, Canyon, Apache

Year

Conduct

ivit

y (

µm

hos/

cm)

Page 10: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Dead or Dry

Roosevelt Lake -

1928, 1929, 1930, 1931, 1934, 1938, 1940, 1947, 1950, 1951, 1956

San Carlos Lake –

1934, 1938, 1939, 1940, 1946, 1947, 1948, 1950, 1951, 1952, 1953, 1955, 1956, 1957, 1960, 1961, 1965, 1971, 1976, 1977

Bill Silvey

Page 11: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Average Conductivity Salt River Lakes (Saguaro-Canyon-Apache) and Roosevelt Lake

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

0

500

1000

1500

2000

2500

3000

Salt River Lakes Roosevelt Lake

Year

Conduct

ivit

y (

um

hos/

cm)

Page 12: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Roosevelt Lake2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

0.000

0.500

1.000

1.500

2.000

2.500

3.000

Conductivity umhos/cm -3 Acre Feet -6

Page 13: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Salt River Flows and Conductivity

0-5

00

501-1

000

1001-1

500

1501-2

000

2001-2

500

2501-3

000

3001-3

500

3501-4

000

4001-4

500

4501-5

000

5001-5

500

5501-6

000

6001-6

500

6501-7

000

<7000

0

500

1000

1500

2000

2500

3000

3500

Cubic Feet per Second

Conduct

ivit

y (

µm

hos/

cm)

Page 14: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Tonto Creek Flows and Conductivity

0-1

00

101-2

00

201-3

00

301-4

00

401-5

00

>1000

0

100

200

300

400

500

600

Cubic Feet per Second

Conduct

ivit

y(µ

mhos/

cm)

Page 15: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Roosevelt LakeSeptember 15, 2000 Conductivity

1392

1801

2125

Page 16: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Average Annual Flows at Salt River Diversion Dam

1914

1918

1922

1926

1930

1934

1938

1942

1946

1950

1954

1958

1962

1966

1970

1974

1978

1982

1986

1990

1994

1998

2002

2006

2010

0

500

1000

1500

2000

2500

3000

3500

Year

CFS

Page 17: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Golden Alga Caused Fish Kills in Waters without Forest Fires

Lake Conductivity

Kearney Lake

Water Ranch

Lake Las Vegas

2500 – 8500

2700 – 2900

2500 - 2900

Page 18: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Waters with Forest Fires that Have Not Resulted in a Golden Alga Fish Kill

Lake Conductivity

Horseshoe

Bartlett

Black Canyon Lake

400 – 750

400 – 700

50 -225

Page 19: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

July 2002

July 19, 2002Conductivity 2570 Flow

263

July 31, 2002Conductivity 753 Flow

900

Page 20: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Questions?

September 14, 2011 Conductivity 1814 Flow 288

CFS

Roosevelt 1091 1.185 million AF

Apache 1067Canyon 1045Saguaro 1062

Page 21: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Salt River Lakes – Drainage Area

Roosevelt – 5830 square miles Apache – 5842 square miles (12 sq mi) Canyon – 6101 square miles (259 sq

mi) Saguaro – 6330 square miles (229 sq

mi)

92% of the watershed lies above Roosevelt dam

Page 22: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Salt River Lakes - Storage

Roosevelt – 1,653,043 acre feet (81%) Apache – 245,138 acre feet (12%) Canyon Lake – 57,832 acre feet (3%) Saguaro – 73,613 acre feet (4%) Total – 2,029,646 acre feet

Page 23: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

Conductivity

The specific conductance test measures the ability of water to pass an electrical current. Conductivity in water is affected by the presence of inorganic dissolved solids such as chloride, sulfate, sodium, calcium and others. The greater the concentrations of ions, the larger the conductivity.

Page 24: Golden Alga (Prymnesium parvum ) Salt River Lakes Marc Dahlberg Water Quality Program Manager March 8, 2011

0

500

1000

1500

2000

2500

Year

Conduct

ivit

y (µ

mhos/

cm)

Salt River Below Saguaro Lake