North American Diatom Ecological Database - NADED Phycology Section, Patrick Center for Environmental Research Diatom Count Report
Water Body: Potomac River Site Location ID: NRSA-FW08MD018 Sample Label: Sample ID: NRSA0064 Client Sample ID: 526004.1 Date Sample Collected: 07/24/2008 Count Finished: Subsample ID: DT1 Slide Replicate ID: a Count Replicate ID: 1 Counted By: Eduardo Morales Sample Type:
Naded Taxon Name Percent Count Notes 94053 Achnanthes brevipes var. intermedia (Kützing) Cleve 5.54 28.0 1010 Achnanthidium minutissimum (Kützing) Czarnecki 2.17 11.0 86002 Actinocyclus normanii (Gregory) Hustedt 0.59 3.0 7075 Amphora copulata (Kützing) Schoeman et Archibald 1.78 9.0 7001 Amphora ovalis (Kützing) Kützing 0.19 1.0 7043 Amphora pediculus (Kützing) Grunow in A. Schmidt 0.19 1.0 18005 Brachysira brebissonii Ross in Hartley 0.19 1.0 18013 Brachysira microcephala (Kützing) Compère 0.19 1.0 12001 Caloneis bacillum (Grunow) Cleve 0.39 2.0 14001 Capartogramma crucicula (Grunow ex Cleve) Ross 0.19 1.0 16005 Cocconeis placentula var. euglypta (Ehrenberg) Grunow 1.38 7.0 16003 Cocconeis placentula var. lineata (Ehrenberg) Van Heurck 7.12 36.0 201001 Ctenophora pulchella (Ralfs ex Kützing) Williams et Round 0.79 4.0 20007 Cyclotella meneghiniana Kützing 0.79 4.0 25008 Denticula kuetzingii Grunow 0.19 1.0 30006 Diploneis subovalis Cleve 0.19 1.0 110005 Encyonema silesiacum (Bleisch in Rabenhorst) Mann in Round, Crawfor+ 0.19 1.0 33015 Eunotia exigua (Brébisson in Kützing) Rabenhorst 0.19 1.0 33021 Eunotia formica Ehrenberg 0.19 1.0 33026 Eunotia incisa Smith ex Gregory 0.19 1.0 33041 Eunotia pectinalis var. undulata (Ralfs) Rabenhorst 0.19 1.0 34098 Fragilaria capucina var. gracilis (Østrup) Hustedt 0.39 2.0 34105 Fragilaria tenera (Smith) Lange-Bertalot 0.19 1.0 34030 Fragilaria vaucheriae (Kützing) Petersen 0.79 4.0 35039 Frustulia krammeri Lange-Bertalot et Metzeltin in Metzeltin and Lan+ 0.19 1.0 210003 Geissleria decussis (Østrup) Lange-Bertalot et Metzeltin 0.79 4.0 36010 Gomphoneis minuta (Stone in McLaughlin and Stone) Kociolek et Stoer+ 1.98 10.0 37300 Gomphonema americobtusatum Reichardt et Lange-Bertalot in Reichardt 0.19 1.0 37003 Gomphonema angustatum (Kützing) Rabenhorst 0.19 1.0 37197 Gomphonema kobayasii Kociolek et Kingston 0.79 4.0 37178 Gomphonema minutum (Agardh) Agardh 0.19 1.0 37029 Gomphonema subclavatum (Grunow in Van Heurck) Grunow 0.79 4.0 209003 Gomphosphenia lingulatiformis (Lange-Bertalot et Reichardt in Lange+ 0.39 2.0 213001 Hippodonta capitata (Ehrenberg) Lange-Bertalot, Metzeltin et Witkow+ 0.79 4.0 213004 Hippodonta costulata (Grunow in Cleve and Grunow) Lange-Bertalot, M+ 1.58 8.0 213002 Hippodonta hungarica (Grunow) Lange-Bertalot, Metzeltin et Witkowski 0.19 1.0 130006 Luticola goeppertiana (Bleisch in Rabenhorst) Mann in Round, Crawfo+ 0.79 4.0 130003 Luticola ventricosa (Kützing) Mann in Round, Crawford and Mann 1.18 6.0 46661 Navicula capitatoradiata Germain 0.19 1.0 46859 Navicula lanceolata (Agardh) Kützing 0.19 1.0 46289 Navicula peregrina (Ehrenberg) Kützing 0.79 4.0 46649 Navicula recens (Lange-Bertalot) Lange-Bertalot in Krammer and Lang+ 3.56 18.0 46896 Navicula rostellata Kützing 0.79 4.0 48004 Nitzschia amphibia Grunow 30.89 156.0 48197 Nitzschia brevissima Grunow ex Van Heurck 0.19 1.0 48122 Nitzschia inconspicua Grunow 0.59 3.0 50012 Opephora aff. olsenii SAVANNAH EAM Møller 0.39 2.0 50002 Opephora martyi Héribaud 0.19 1.0 194005 Placoneis elginensis (Gregory) Cox 0.19 1.0 155009 Planothidium delicatulum (Kützing) Round et Bukhtiyarova 2.37 12.0 155017 Planothidium frequentissimum (Lange-Bertalot in Krammer and Lange-B+ 2.37 12.0 158001 Pleurosira laevis (Ehrenberg) Compère 0.19 1.0 55002 Reimeria sinuata (Gregory) Kociolek et Stoermer 0.79 4.0 57002 Rhoicosphenia abbreviata (Agardh) Lange-Bertalot 1.38 7.0 62007 Stauroneis smithii Grunow 0.19 1.0 172006 Staurosira construens var. venter (Ehrenberg) Hamilton in Hamilton,+ 0.19 1.0 67004 Tabellaria flocculosa (Roth) Kützing 4.75 24.0 200002 Tabularia fasciculata (Agardh) Williams et Round 15.24 77.0
Report Date: 5/29/2023 Total Number of Taxa: 58 Total Number Counted: 505
Count Notes:
? Comments: Row 1 x 109, y 3, y 17. Only 119 valves counted in 1 hour of analysis. A full count would not be reached by time limit.
Sample is full of large sediment particled, partially dissolved and broken valves.
Continued count Row 2 x 107, y 17, y 2, Row 3 x 106, y 2, y 17, Row 4 x 105, y 17, y 2, Row 5 x 104, y 2, y 17, Row 6 x 103, y 17, y 2. Sparse sample, only 505 valves counted. It would probably take another 45 minutes to complete the count up to 600 valves.
Taxa Notes:
None.
Counts version 3.3 - last revision 2/16/2021 If problems with this page, please email