Class Bacillariophyceae

 

1.diatom community

 

community_jason_dbplants29_40125.jpg (89699 bytes)

500x

 

Dollar Bay

collected with aquatic plants

9/26/01

 

  

2.diatom community

 

250x

community_jason3_prplants6_20125.jpg (38344 bytes)

250x

Pilgrim River

collected with aquatic plants in pool

9/19/01

 

  

3.diatom community

 

community_jason4_coles19_202.jpg (31190 bytes)

400x

community_jason4_coles14_20125.jpg (81375 bytes)

250x

Cole's Creek

collected off rocks in riffle

9/27/01

 

  

4.diatom community

 

diatoms_jason9_porrock15_20125.jpg (67352 bytes)

250x

diatoms_jason9_porrock15a_40125.jpg (64267 bytes)

500x

Keweenaw Waterway at MTU

collected with rock scrapings

11/8/01

 

  

 

 

 

Centric Diatoms

 

 

Acanthoceras .          

 

1.Acanthoceras

 

640x

Keweenaw Waterway at MTU

surface plankton tow

8/10/03

23 oC

 

  

2.Acanthoceras

 

800x

Keweenaw Waterway at MTU

oblique plankton tow

10/16/05

13.5 oC

 

  

3.Acanthoceras

 

800x

 same as above

 

  

4.Acanthoceras

 

500x

Keweenaw Waterway at MTU

surface plankton tow

8/10/03

23 oC

 

  

 

Cyclotella          

 

1.Cyclotella

 

Cyclotella_jason_dbplants21_4025.jpg (34833 bytes)

1000x

Cyclotella_jason_dbplants21a_4025.jpg (35481 bytes)

1000x

Dollar Bay

collected with aquatic plants

9/26/01

 

  

2.Cyclotella

 

Cyclotella_jason3_prr13_4025.jpg (30679 bytes)

1000x

  

Pilgrim River

collected from rocks in riffle

9/19/01

 

  

3.Cyclotella

(empty frustule)

 

1000x

  

Keweenaw Waterway at South Entry boat launch

collected with aquatic plants

9/19/01

 

  

4.Cyclotella

(chain)

 

800x

 

Dollar Bay at boat launch

surface plankton tow

10/10/01

pH 7.12, 15.8oC

 

  

 

Melosira .          

 

1.Melosira granulata

 

Melosira granulata_jason_dbtow1a_2016.jpg (36957 bytes)

320x

Melosira granulata_jason_dbtow1_4025.jpg (44461 bytes)

1000x

Dollar Bay

surface plankton tow

9/26/01

 

  

2.Melosira granulata

 

Melosira granulata_jason_dbtow5_402.jpg (41132 bytes)

800x

 

same as above

 

  

3.Melosira granulata

 

Melosira_jason7_dbentra1_402.jpg (35038 bytes)

800x

Dollar Bay at boat launch

surface plankton tow

10/10/01

pH 7.12, 15.8 oC

 

  

4.Melosira varians

 

Melosira varians_jason3_prr4_202.jpg (55388 bytes)

400x

 

Pilgrim River

collected from rocks in riffle

9/19/01

 

  

5.Melosira varians

 

400x

 

Pilgrim River

collected with rock scrapping from riffle

8/10/03

21oC

 

  

6.Melosira varians

(auxospore)

 

800x

 

same as above

 

  

7.Melosira varians

(auxospore)

 

400x

 

 same as above

 

  

8.Melosira varians

(auxospore)

 

Melosira varians_jason3_prr3_402.jpg (51915 bytes)

800x

 

Pilgrim River

collected from rocks in riffle

9/19/01

 

  

9.Melosira varians

(auxospore)

 

Melosira varians_jason3_prr2_402.jpg (43294 bytes)

800x

Melosira varians_jason3_prr2a_402.jpg (43118 bytes)

800x

same as above

 

  

10.Melosira

 

Melosira_jason4_mtuportage3_4016.jpg (42040 bytes)

640x

 

Keweenaw Waterway at MTU

9/12/01

 

  

11.Melosira

 

Melosira_jason3_sep6_4025.jpg (44890 bytes)

1000x

 

Keweenaw Waterway at South Entry at boat launch

collected with aquatic plants

9/19/01

 

  
12.Melosira

 

Keweenaw Waterway at MTU

plankton tow

10/29/07 (examined eight days later)

 

  

13.Melosira

 

250x

500x

 Keweenaw Waterway at MTU

surface plankton tow

5/1/03

7 oC

 

  

14.Melosira

 

Melosira_jason7_dbentra2_402.jpg (38658 bytes)

800x

Dollar Bay at boat launch

surface plankton tow

10/10/01

pH 7.12, 15.8 oC

 

  

15.Melosira

 

640x

 

MTU runoff settling pond

collected with aquatic plants

6/12/03

17.0 oC

 

  

 

Stephanodiscus .          

 

1.Stephanodiscus

 

Stephanodiscus_jason6_db_entrance4a_402.jpg (47179 bytes)

800x

Stephanodiscus_jason6_db_entrance4_402.jpg (41891 bytes)

800x

entrance of Dollar Bay

surface plankton tow

10/10/01

pH 7.51, 15 oC

 

  

2.Stephanodiscus

(empty frustule)

 

Stephanodiscus_jason9_portow4_402.jpg (48391 bytes)

800x

Stephanodiscus_jason9_portow4a_402.jpg (53559 bytes)

800x

Keweenaw Waterway at MTU

surface plankton tow

11/8/01

 

  

3.Stephanodiscus

 

800x

  

Portage Lake

oblique plankton tow

9/18/05

20 oC

 

  

4.Stephanodiscus

 

800x

focus though

1.18 MB

Keweenaw Waterway at MTU

surface plankton tow

6/11/03

16.5 oC

 

  

5.Stephanodiscus

 

800x

  

same as above

 

  

6.Stephanodiscus

(dividing)

 

800x

  

same as above

 

  

7.Stephanodiscus

 

 

girdle view

800x

girdle view

800x

same as above

 

 

  

 

Urosolenia .          

 

1.Urosolenia eriensis

 

640x

Torch Lake at Hubbell boat launch

oblique plankton tow

10/15/05

13 oC

 

  

2.Urosolenia eriensis

 

500x

same as above

 

  

3.Urosolenia eriensis

 

500x

same as above

 

  

4.Urosolenia eriensis

 

500x

Keweenaw Waterway at MTU

surface plankton tow

11/22/05

6.0 oC

 

  

5.Urosolenia longiseta

 

320x

Chassell Bay

oblique plankton tow

7/30/06

24.5 oC

 

  

5.Urosolenia longiseta

 

500x

same as above

 

 

 

 

 

Araphid Diatoms

 

 

Asterionella .          

 

1.Asterionella formosa

 

640x

 

Keweenaw Lake at MTU

surface plankton tow

5/1/03

7 oC

 

  

2.Asterionella formosa

 

400x

800x

MTU runoff settling pond

surface plankton tow

10/16/05

11 oC

 

  

3.Asterionella formosa

 

500x

 

Keweenaw Waterway at MTU

oblique plankton tow

10/16/05

13.5 oC

 

  

4.Asterionella formosa

 

500x

 

Keweenaw Waterway at MTU

surface plankton tow

6/11/03

16.5 oC

 

  

5.Asterionella formosa

 

 

value view

800x

 

Keweenaw Waterway at MTU

surface plankton tow

6/12/03

19.5 oC

 

 

  

 

Diatoma .          

 

1.Diatoma

(empty frustule)

 

Diatoma hiemale_jason3_prr21_4025.jpg (38558 bytes)

1000x

Pilgrim River

collected off rocks in riffle

9/19/01

 

  

2.Diatoma

(empty frustule)

 

800x

MTU runoff settling pond

surface plankton tow

8/10/03

25.5 oC

 

  

3.Diatoma

 

Diatoma vulgare_jason3_prr12_4025.jpg (33458 bytes)

1000x

Pilgrim River

collected off rocks in riffle

9/19/01

 

  

4.Diatoma vulgare

 

Diatoma_jason8_prlog5_402.jpg (40302 bytes)

800x

Pilgrim River

collected with log scrapings from pool at bridge

11/1/01

 

  

5.Diatoma vulgare

 

400x

Pilgrim River

collected with rock scrapping from riffle

8/10/03

21oC

 

  

 

Fragilaria .          

 

1.Fragilaria crotonensis

 

800x

  

Keweenaw Waterway at MTU

surface plankton tow

8/10/03

23 oC

 

  

2.Fragilaria crotonensis

 

Fragilaria crotonensis_jason_dbtow12_202.jpg (102021 bytes)

400x

  

Dollar Bay

surface plankton tow

9/26/01

 

  

3.Fragilaria crotonensis

 

800x

  

Torch Lake at Lake Linden boat launch

surface plankton tow

9/27/05

18.5 oC

 

  

4.Fragilaria crotonensis

 

Fragilaria crotonensis_jason_dbplants17_4025.jpg (63723 bytes)

1000x

  

Dollar Bay at boat launch

surface plankton tow

10/10/01

pH 7.12, 15.8 oC

 

  

5.Fragilaria

 

250x

800x

Dollar Bay from shore

surface plankton tow

6/19/07

19 oC

 

  

6.Fragilaria

 

800x

  

Swedetown Pond

collected as macroscopic algae

8/29/05

12 oC

 

  

 

Meridion .          

 

1. Meridion circulare

 

800x

 Pilgrim River

scraped off rock in riffle

5/10/03

6.5 oC

 

  

2.Meridion circulare

 

800x

same as above

 

  

3.Meridion circulare

 

 

value view

800x

same as above

 

 

  

4.Meridion circulare

 

800x

 creek within Tech Trails

collected with algal mat on decaying leaves

5/14/03

9.5 oC

 

  

5.Meridion circulare

 

400x

 same as above

 

  

 

Synedra .          

 

1. Synedra ulna var. contracta

 

Synedra_jason3_prr16_4025.jpg (34815 bytes)

1000x

Pilgrim River

collected off rocks in riffle

9/19/01

 

  

2.Synedra ulna var. contracta

 

Synedra_jason3_prr8_4025.jpg (36613 bytes)

1000x

same as above

 

  

3.Synedra ulna var. contracta

(empty frustule)

 

Synedra_jason5_calumetcreek2_402.jpg (35575 bytes)

800x

roadside creek outside Calumet

collected off rocks in riffle

10/3/01

 

  

4.Synedra capitata

 

Synedra capitata (2)_JASON2_DBPLANTS19_2016.jpg (44387 bytes)

320x

1000x

Dollar Bay

collected with aquatic plants

9/19/01

 

  

5.Synedra

 

Synedra acus_JASON2_DBPLANTS40_402.jpg (40385 bytes)

800x

same as above

 

  

6.Synedra

 

Synedra acus_JASON2_DBPLANTS41_402.jpg (45890 bytes)

800x

same as above

 

  

7.Synedra

 

 

Synedra_BEAVER_POND18_4016.jpg (34895 bytes)

girdle view

640x

beaver pond near Isle Royale School

surface plankton tow

9/5/01

pH 6.54, 26.5 oC

 

 

  

8.Synedra

 

 

Synedra_jason_dbplants13_402.jpg (35651 bytes)

girdle view

800x

Dollar Bay

collected with aquatic plants

9/19/01

 

 

  

9.Synedra

(pin-cushion colony)

 

400x

Keweenaw Waterway at MTU

surface plankton tow

11/22/05

6.0 oC

 

  

10.Synedra

(pin-cushion colony)

 

400x

 

Keweenaw Waterway at MTU

surface plankton tow

6/11/03

16.5 oC

 

  

 

Tabellaria .          

 

1.Tabellaria  fenestrata

 

 

Tabellaria fenestrata_jason6_prss4a_4016.jpg (40227 bytes)

girdle view

640x

Tabellaria fenestrata_jason6_prss4_4016.jpg (37282 bytes)

valve view

640x

Peepsock discharge stream

collected with aquatic plants

9/29/01

 

 

  

2.Tabellaria fenestrata

 

500x

 

Rice Lake

collected with aquatic plants

9/27/05

20 oC

 

  

3.Tabellaria fenestrata

 

500x

 

Torch Lake at Lake Linden boat launch

surface plankton tow

9/27/05

18.5 oC

 

  

4.Tabellaria fenestrata

 

640x

 

Keweenaw Waterway at MTU

surface plankton tow

6/11/03

16.5 oC

 

  

5.Tabellaria flocculosa

 

Tabellaria flocculosa_jason_dbplants11_2016.jpg (48455 bytes)

320x

Tabellaria flocculosa_jason_dbplants12_402.jpg (58992 bytes)

800x

Dollar Bay

collected with aquatic plants

9/29/01

 

  

6.Tabellaria flocculosa

 

640x

 

Keweenaw Waterway at Lily Pond

oblique plankton tow

8/29/05

15 oC

 

  

7.Tabellaria flocculosa

 

500x

 

Keweenaw Waterway at MTU

surface plankton tow

6/11/03

16.5 oC

 

  

8.Tabellaria flocculosa

 

640x

 

same as above

 

  

9.Tabellaria flocculosa

 

250x

800x

same as above

 

  

 

 

 

Monoraphid Diatoms

 

 

Achnanthes          

 

1.Achnanthes

 

800x

Pilgrim River

collected with log scraping in pool

11/1/01

 

  

2.Achnanthes

 

640x

Dollar Bay at boat launch

collected with aquatic plants

9/21/05

20.5 oC