usgs

Table B2. Phytoplankton density and biomass, Lake Owen
[Density in cells per liter, biomass in micrograms per liter]

 

Date

9-2-97

9-16-97

7-17-98

7-23-98

8-5-98

8-11-98

8-19-98

9-3-98

9-10-98

9-17-98

9-22-98

Chlorophyta

                     

Actinastrum density

0

0

5,000

0

0

0

0

0

0

0

0

Actinastrum biomass

0

0

1.1

0

0

0

0

0

0

0

0

Ankistrodesmus density

0

0

0

0

10,000

0

0

0

0

0

0

Ankistrodesmus biomass

0

0

0

0

2.8

0

0

0

0

0

0

Chlorella density

0

2,314,000

0

10,000

0

0

0

0

0

0

0

Chlorella biomass

0

78

0

0.3

0

0

0

0

0

0

0

Chlorophyte size 2 density

70,000

0

0

10,000

0

0

0

0

0

0

0

Chlorophyte size 2 biomass

42

0

0

6.1

0

0

0

0

0

0

0

Chlorophyte size 4 density

0

0

0

0

10,000

10,000

50,000

0

0

0

40,000

Chlorophyte size 4 biomass

0

0

0

0

1.6

1.6

8.1

0

0

0

6.4

Cosmarium density

0

0

0

10,000

0

0

0

0

0

0

10,000

Cosmarium biomass

0

0

0

200

0

0

0

0

0

0

200

Crucigenia density

0

0

0

0

0

0

0

0

0

10,000

0

Crucigenia biomass

0

0

0

0

0

0

0

0

0

6.9

0

Oocystis density

0

0

0

10,000

0

0

0

0

0

0

40,000

Oocystis biomass

0

0

0

1.0

0

0

0

0

0

0

4.0

Quadrigula density

0

90,000

0

0

0

0

0

0

20,000

0

0

Quadrigula biomass

0

53

0

0

0

0

0

0

12

0

0

Scenedesmus density

0

0

0

0

0

0

80,000

0

0

0

40,000

Scenedesmus biomass

0

0

0

0

0

0

4.1

0

0

0

2.1

Sphaerocystis density

0

0

0

0

0

80,000

0

0

0

0

0

Sphaerocystis biomass

0

0

0

0

0

9.0

0

0

0

0

0

Spondylosium density

0

0

0

0

0

0

0

0

0

10,000

0

Spondylosium biomass

0

0

0

0

0

0

0

0

0

7.2

0

Tetraspora density

0

170,000

0

0

0

0

0

0

0

0

0

Tetraspora biomass

0

89

0

0

0

0

0

0

0

0

0

Zygnematales density

0

0

0

0

0

0

0

0

0

0

10,000

Zygnematales biomass

0

0

0

0

0

0

0

0

0

0

39

Chrysophyta

                     

Chrysophyte size 1 density

0

0

0

0

0

0

0

0

0

10,000

40,000

Chrysophyte size 1 biomass

0

0

0

0

0

0

0

0

0

13

51

Dinobryon density

0

0

0

0

0

50,000

0

0

0

0

0

Dinobryon biomass

0

0

0

0

0

5.4

0

0

0

0

0

Mallomonas density

0

0

0

0

0

0

0

40,000

50,000

0

0

Mallomonas biomass

0

0

0

0

0

0

0

23

29

0

0

Uroglenopsis density

0

0

0

0

0

26,236,000

0

30,503,000

19,175,000

15,170,000

2,104,000

Uroglenopsis biomass

0

0

0

0

0

6,100

0

7,000

4,400

3,500

490

Cryptophyta

                     

Campylomonas reflexa density

0

0

0

0

20,000

0

0

0

0

0

0

Campylomonas reflexa biomass

0

0

0

0

16

0

0

0

0

0

0

Campylomonas rostratiformis density

0

0

0

0

0

0

0

0

10,000

10,000

30,000

Campylomonas rostratiformis biomass

0

0

0

0

0

0

0

0

51

51

150

Cryptophyte size 1 density

0

10,000

0

0

0

0

0

0

0

0

0

Cryptophyte size 1 biomass

0

5.0

0

0

0

0

0

0

0

0

0

Cryptophyte size 2 density

0

0

0

0

0

0

0

0

0

10,000

10,000

Cryptophyte size 2 biomass

0

0

0

0

0

0

0

0

0

19

19

Cryptophyte size 3 density

0

10,000

0

0

0

0

0

0

0

0

0

Cryptophyte size 3 biomass

0

2.3

0

0

0

0

0

0

0

0

0

Cryptomonas density

0

0

0

0

0

0

0

0

20,000

10,000

0

Cryptomonas biomass

0

0

0

0

0

0

0

0

41

21

0

Katablepharis density

0

0

0

40,000

330,000

40,000

140,000

20,000

60,000

40,000

40,000

Katablepharis biomass

0

0

0

7.3

60

7.3

26

3.7

11

7.3

7.3

Plagioselmis density

0

0

0

30,000

0

0

0

0

0

0

10,000

Plagioselmis biomass

0

0

0

3.5

0

0

0

0

0

0

1.2

Bacillariophyta

                     

Achnanthes density

0

0

0

0

0

0

0

0

0

10,000

0

Achnanthes biomass

0

0

0

0

0

0

0

0

0

1.5

0

Asterionella density

0

0

0

0

0

0

0

0

30,000

20,000

0

Asterionella biomass

0

0

0

0

0

0

0

0

34

23

0

Fragilaria density

0

0

0

0

0

0

0

0

0

0

60,000

Fragilaria biomass

0

0

0

0

0

0

0

0

0

0

117

Pennales size 2 density

0

0

0

0

0

0

0

0

0

0

10,000

Pennales size 2 biomass

0

0

0

0

0

0

0

0

0

0

99.73

Pennales size 3 density

0

0

0

0

0

0

0

10,000

0

0

0

Pennales size 3 biomass

0

0

0

0

0

0

0

14

0

0

0

Synedra density

0

0

0

0

10,000

0

0

0

0

0

0

Synedra biomass

0

0

0

0

25

0

0

0

0

0

0

Pyrrophyta

                     

Gymnodinium density

0

0

0

0

0

0

0

0

0

30,000

10,000

Gymnodinium biomass

0

0

0

0

0

0

0

0

0

61

20

Euglenophyta

                     

Euglena density

0

0

0

0

0

0

0

0

0

0

10,000

Euglena biomass

0

0

0

0

0

0

0

0

0

0

180

Euglenophyte size 1 density

0

0

0

0

0

0

0

0

0

10,000

0

Euglenophyte size 1 biomass

0

0

0

0

0

0

0

0

0

26

0

Euglenophyte size 2 density

0

0

0

0

0

0

0

0

0

10,000

0

Euglenophyte size 2 biomass

0

0

0

0

0

0

0

0

0

115

0

Trachelomonas size 2 density

0

0

0

0

0

0

10,000

0

10,000

0

0

Trachelomonas size 2 biomass

0

0

0

0

0

0

58

0

58

0

0

Colorless Flagellates

                     

Flagellate size 3 density

0

0

5,000

40,000

0

0

80,000

30,000

0

0

0

Flagellate size 3 biomass

0

0

0.7

5.8

0

0

12

4.3

0

0

0

Salpingoeca density

0

0

0

0

0

0

0

0

60,000

0

0

Salpingoeca biomass

0

0

0

0

0

0

0

0

180

0

0

Ciliates

                     

Ciliate size 1 density

0

0

0

0

0

0

0

0

10,000

0

0

Ciliate size 1 biomass

0

0

0

0

0

0

0

0

14

0

0

Ciliate size 2 density

0

0

0

0

0

0

10,000

0

0

0

10,000

Ciliate size 2 biomass

0

0

0

0

0

0

42

0

0

0

42

Ciliate size 3 density

0

0

0

0

0

0

0

0

0

20,000

0

Ciliate size 3 biomass

0

0

0

0

0

0

0

0

0

110

0

Ciliate size 5 density

0

0

0

0

0

0

0

0

0

10,000

0

Ciliate size 5 biomass

0

0

0

0

0

0

0

0

0

13,000

0

Ciliate size 6 density

0

0

0

20,000

0

0

0

0

0

0

0

Ciliate size 6 biomass

0

0

0

9.4

0

0

0

0

0

0

0

Rotifers

0

0

0

0

0

0

0

0

0

0

0

Ameba density

0

0

0

0

0

0

0

0

0

0

10,000

Ameba biomass

0

0

0

0

0

0

0

0

0

0

14

Go back to Appendix B