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Table 4 Phytoplankton composition

From: Dynamics of Sundarban estuarine ecosystem: eutrophication induced threat to mangroves

Identity of taxa

Average no of individuals (cells/ml)

 

Nov,

08

Dec,

08

Jan,

09

Feb,

09

March,

09

April,

09

May,

09

Class Bacillariophyceae

       

Order

       

Centrales

       

Coscinodiscus radiatus

18

17

18

22

8

7

7

Coscinodiscus perforatus

14

13

15

19

2

1

1

CoscinodiscusIII

13

14

22

18

1

-

-

Cyclotella sp.

5

5

4

16

-

-

-

Cyclotella striata

13

14

16

18

2

-

-

Triceratinum spI

15

18

20

24

6

2

1

Triceratinum spII

3

4

8

12

2

1

-

Paralia sulcata

2

3

8

10

1

-

-

Asteromphalus sp

2

2

4

6

3

1

-

Hyalodiscus sp

2

2

2

4

2

-

-

Thalassiosira punctigera

14

16

16

19

4

2

2

Thalassiosira spII

2

3

3

6

1

-

-

Bascteriastrum hyalinum

16

17

16

18

4

2

2

Bascteriastrum spII

4

5

5

8

2

-

-

Actinocyclus octanarius

8

8

10

18

2

1

-

Actinocyclus spII

6

9

11

14

2

1

1

Actinoptychus sp

3

4

4

7

1

-

-

Chaetoceros curvisetus

16

16

18

18

3

2

2

Chaetoceros subtilis

15

16

18

16

5

1

3

Chaetoceros convolutus

15

14

13

20

3

3

3

ChaetocerosIV

13

5

6

13

4

2

1

ChaetocerosV

4

6

6

16

3

1

1

ChaetocerosVI

4

4

4

8

4

1

1

ChaetocerosVII

3

4

18

6

2

-

-

Planktoniella spI

8

10

18

14

1

-

-

Planktoniella spII

6

12

10

18

1

1

-

Eunotia sp.

5

7

9

12

7

3

1

Order

       

Pennales

       

Navicula penata

2

2

1

2

12

6

6

Navicula spII

-

2

1

2

10

8

6

Pinnularia spI

-

-

-

2

9

5

5

Pinnularia spII

-

1

1

2

12

6

5

Diatoma sp

-

-

-

6

16

8

4

Tabellaria sp

3

2

2

6

10

9

2

Fragillaria sp I

-

-

-

4

4

4

3

Fragillaria sp II

-

1

1

7

15

6

3

Gyrosigma baticum

-

1

1

2

13

4

3

Grammatophora marina

1

1

1

2

12

5

2

Climatopleura sp

-

-

-

1

5

4

3

Climacosphenia elongata

1

-

-

2

6

5

3

Climacosphenia spII

-

1

2

4

16

8

2

Cymbella marina

1

1

1

2

4

10

3

Thalossionema nitzschioides

4

5

6

11

19

8

5

Thalossionema sp

2

3

3

8

8

8

3

Nitzschia spI

1

1

-

2

18

8

3

Asterionella sp

1

4

2

4

5

5

2

Asterionellopsis gracilis

-

1

1

2

3

2

2

Class Chlorophyceae

       

Order

       

Zygnimataes

       

Cosmarium sp

       

Closterium sp

6

8

10

15

8

6

3

Netrium sp

1

2

2

4

6

4

2

Order

2

3

6

4

2

2

3

Chlorococcales

       

Chlorella salina

       

Chlorella marina

-

-

-

2

8

10

9

Order

1

2

2

3

11

6

6

Dunaliellales

       

Dunaliella salina

       

Order

-

-

-

1

14

17

19

Chaetophorales

       

Draparnaldia sp

       

Class Pyrrophyceae

-

1

2

4

6

6

3

Order

       

Prorocentrales

       

Prorocentrum concavum.

       

Order

1

1

2

4

6

4

2

Peridiniales

       

Protoperinidium pellucidum

       

Protoperinidium conicum

       

Protoperinidium spIII

2

2

1

3

5

6

4

Peridinium sp

1

1

1

1

4

6

3

Ceratinum fusus

1

1

1

1

2

4

2

 

2

2

2

2

2

4

1

Order

1

1

1

1

1

3

2

Dinophysales

       

Dinophysis acuta

-

2

2

4

6

2

4

Dinophysis norvegica

-

-

-

1

5

3

5

polykriskos schwartzil

2

3

4

5

5

4

4

Class Cyanophyceae

       

Order

       

Nostocales

       

Anabaena

2

3

2

4

4

4

4

Order

       

Chrococcales

       

Gleocapsa sp

1

2

6

3

4

5

2

Order

       

Stigonematalis

       

Stigonema sp

3

2

2

4

5

5

5

Order

       

Oscillatoriales

       

Oscillatoria sp

3

2

4

5

5

7

8

Tricodesmium sp

1

4

6

6

6

2

2

Class Euglenophyceae

       

Order

       

Euglenales

       

Euglena spI

4

6

4

7

7

5

2

Euglena spII

2

6

8

7

8

3

2

Class Chrysophyceae

       

Order

       

Dictyochales

       

Dictyocha speculum

2

1

4

6

4

2

1

Dictyocha spII

2

4

6

6

2

1

1

  1. Phytoplankton composition of most abundant taxa throughout the entire study period.