North American Diatom Ecological Database - NADED
Phycology Section, Patrick Center for Environmental Research
Soft Algae Count Report

Water Body: Duck Brook             Site Location ID: ME-000593  Sample Label: 1619
Sample ID: MEDP1055                Client Sample ID: SA-322-2016 (1619)
Date Sample Collected: 06/28/2016  Count Finished: 02/24/2017
Subsample ID: PR1                  Slide Replicate ID: a     Count Replicate ID: 1
Counted By: Laura Aycock           Sample Type: QMH-micro

  Naded Type             Taxon Name                                             #Units  Percent   #Cells  Percent Notes   
 249999 Unclassified     (undifferentiated) (diatoms)                              276    63.59      276    57.62
 249998 Unclassified     (undifferentiated) diatoms> (dead)                        146    33.64      146    30.48
 316012 Green Algae      Closterium incurvum Brébisson                               2     0.46        2     0.41 Yes
 327014 Green Algae      Cosmarium undulatum Corda ex Ralfs                          1     0.23        1     0.20 Yes
 379002 Green Algae      Euastrum insulare (Wittrock) Roy                            3     0.69        3     0.62 Yes
 401000 Green Algae      Gongrosira sp.                                              1     0.23        9     1.87 Yes
 852004 Blue-Green Algae Homoeothrix (Tapinothrix) janthina (Bornet et Flahault) Starmach       3     0.69       24     5.01 Yes
 863016 Blue-Green Algae Leptolyngbya sp.                                            1     0.23       14     2.92 Yes
 510003 Green Algae      Scenedesmus acutus Meyen                                    1     0.23        4     0.83 Yes

Report Date: 9/22/2023          Total Number of Taxa: 9          Total Natural Units: 434
                                                                  Total Number of Cells: 479

Count Notes:

  Comments: Sample sparse and contains a lot of sediment. Abundance of dead diatoms. Two palmer cells were counted.
Taxa Notes:
Naded 316012: Cell strongly curved with pointed poles. Cell wall is smooth and colorless. Cell length ranges from 34.4-38.4µm and width ranges from 5.5-6.1µm. Cell is 5.6-6.9 times longer than broad.
Naded 327014: Semicells are subsemicircular with undulated margins. Median constriction is deep with narrow sinus. Cell length is 15.5µm and width is 17.9µm.
Naded 379002: Cell is quadrangular in outline. Basal lobes are slightly bilobed and quadrangular in outline. Sinus is narrow and closed. Cell length ranges from 10.8-11.4µm and width ranges from 8.8-9.0µm.
Naded 401000: Clavate cells in a prostate colony.
Naded 510003: Cylindrical cells arranged latterly in a colony. Each cell has a curved spike on cell apices. Cell length is about 5.1µm and width is about 1.0µm.
Naded 863016: Cylindrical filaments in a thin sheath. Filament ends not tapper and cells are not constricted. Filament width is about 1.2µm.
Naded 852004: Filaments are incased in a sheath. Filaments are attached to substrate and have tapered ends. Filament width is about 1.4µm.


Counts version 3.3 - last revision 2/16/2021
If problems with this page, please email