Navicula duerrenbergiana

Hustedt in A. Schmidt et al. 1934      Category: Symmetrical biraphid
BASIONYM: Navicula duerrenbergiana Hustedt in Schmidt et al. 1934

REPORTED AS: Navicula stundlii (Hustedt 1959) 

Navicula detenta

 

Navicula erifuga
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LM scalebar = 10 µm = 80 pixels.

Observations

Contributor: Loren Bahls - January 2012
Length Range: 40-52 µm
Width Range: 3.8-5.4 µm
Striae in 10 µm: 15-17

Description

Valves are weakly silicified and narrow linear-lanceolate with acutely pointed apices. The axial area is very narrow and barely wider than the raphe. The central area is absent. Raphe branches are filiform. Proximal raphe ends are straight, not expanded, and very close together. Striae are finely lineate and weakly radiate throughout. Areolae in the striae number about 45 in 10 µm.

Note: the name Navicula duerrenbergiana is considered to be invalid (California Academy of Sciences, Catalogue of Diatom Names, September 2011).

Original Description

Basionym: Navicula duerrenbergiana
Author: Hustedt in Schmidt et al. 1934
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Bahls, L. (2012). Navicula duerrenbergiana. In Diatoms of the United States. Retrieved May 24, 2013, from http://westerndiatoms.colorado.edu/taxa/species/navicula_duerrenbergiana

Species: Navicula duerrenbergiana

Contributor: Loren Bahls

Reviewer: Marina Potapova

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Image Credit: Loren Bahls

  1. Frustules weakly silicified
  2. Valves narrow linear-lanceolate
  3. Apices pointed
  4. Striae finely lineate
  5. Central area absent

Navicula duerrenbergiana has weakly silicified frustules that are easy to overlook in strewn mounts. Valves are narrow linear-lanceolate with pointed apices. The striae are finely lineate and weakly radiate throughout. The proximal raphe ends are very close and not expanded. Central area is absent.

Compare

Navicula angusta has broadly rounded apices, more steeply radiate striae, a well-defined central area, and a preference for waters with low electrolyte content.

Navicula angusta

Citations

Krammer, K. and Lange-Bertalot, H. (1986). Bacillariophyceae. 1. Teil: Naviculaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Susswasserflora von Mitteleuropa, Band 2/1. Gustav Fisher Verlag, Jena. 876 pp.

Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.

Schmidt, A. (-). (1874-1959). Atlas der Diatomaceen-Kunde, von Adolf Schmidt, continued by Martin Schmidt, Friedrich Fricke, Heinrich Heiden, Otto Muller, Friedrich Hustedt. Reprint 1984, Koeltz Scientific Books, Konigstein, 480 plates.

Simonsen, R. (1987). Atlas and Catalogue of the Diatom Types of Friedrich Hustedt. J. Cramer, Berlin & Stuttgart 1: 525 pp.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Navicula duerrenbergiana CAS

North American Diatom Ecological Database (NADED)

NADED ID: 93021

Autecology Discussion

There are 101 records of Navicula duerrenbergiana in the Montana Diatom Collection, all of them from streams on the Northwestern Great Plains of Montana, South Dakota, and Wyoming. These waters have a mean pH of 8.2 and a mean conductivity of 1899 µS/cm, along with elevated concentrations of sodium and sulfate (see table below). Common diatom associates of Navicula duerrenbergiana in these habitats include Mastogloia smithii, Nitzschia reversa, Gyrosigma macrum, Mastogloia elliptica, Nitzschia microcephala, Tryblionella compressa, Nitzschia filiformis, Navicula salinicola, Diploneis puella, and Biremis circumtexta. In Europe, Krammer and Lange-Bertalot (1986) report Navicula duerrenbergiana from brackish waters along sea coasts and from inland waters with elevated electrolyte content.

Images

Little Dry Creek at Flowing Well, Garfield County, Montana: home of Navicula duerrenbergiana.

Credit/Source: Loren Bahls

Abundance-weighted means of selected water quality variables measured concurrently with the collection of samples containing Navicula duerrenbergiana.

Credit/Source: Montana Diatom Database

Habits

Size Range

101-1000 µm3 (ie Amphora veneta)

Motility

moderately motile (e.g. Navicula tripunctata)

Attachment

unattached

Habitat

benthic

Colony

solitary

EMAP Assessment

Sampling for the Environmental Protection Agency (EPA) western Environmental Monitoring and Assessment Program (EMAP) study was completed during the years 2000-2004 (see citations at bottom of this page). Streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming). Over 1200 sites on streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming) were selected for sampling based on a stratified randomized design. This type of design insures that ecological resources are sampled in proportion to their actual geographical presence. Stratified randomized design also allows for estimates of stream length with a known confidence in several “condition classes” (good or least-disturbed, intermediately-disturbed, and poor or most-disturbed) for biotic condition, chemistry and habitat.

EMAP Distribution

Navicula duerrenbergiana

Distribution

The distribution map represents the relative abundance of this Navicula duerrenbergiana in the western EMAP study. Relative abundance is a measure of the proportion of cells of this species based on a "fixed count" of 300 total diatom cells counted and identified. Each of the western EMAP sample sites is shown, either with a black dot for sites where Navicula duerrenbergiana was not recorded, or with a red circle indicating the relative abundance of Navicula duerrenbergiana.

Note that the size of the proportional symbols varies between species to help show both abundant and rare species.

Scale for the map to the left

EMAP Response Plots

Navicula duerrenbergiana

Responses

The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Navicula duerrenbergiana from all the stream reaches where it was present. Note that the relative abundance scale is the same on each plot. Explanation of each environmental variable and units are as follows:

ELEVATION = stream reach elevation (meters)
STRAHLER = distribution plot of the Strahler Stream Order
SLOPE = stream reach gradient (degrees)
W1_HALL = an index that is a measure of streamside (riparian) human activity that ranges from 0 - 10, with a value of 0 indicating of minimal disturbance to a value of 10 indicating severe disturbance.
PHSTVL = pH measured in a sealed syringe sample (pH units)
log_COND = log concentration of specific conductivity (µS/cm)
log_PTL = log concentration of total phosphorus (µg/L)
log_NO3 = log concentration of nitrate (µeq/L)
log_DOC = log concentration of dissolved organic carbon (mg/L)
log_SIO2 = log concentration of silicon (mg/L)
log_NA = log concentration of sodium (µeq/L)
log_HCO3 = log concentration of the bicarbonate ion (µeq/L)
EMBED = percent of the stream substrate that is embedded by sand and fine sediment
log_TURBIDITY = log of turbidity, a measure of cloudiness of water, in nephelometric turbidity units (NTU).
DISTOT = an index of total human disturbance in the watershed that ranges from 1 - 100, with a value of 0 indicating of minimal disturbance to a value of 100 indicating severe disturbance.

EMAP citations

Results are published in:

Johnson, T., Hermann, K., Spaulding, S., Beyea, B., Theel, C., Sada, R., Bollman, W., Bowman, J., Larsen, A., Vining, K., Ostermiller, J., Petersen, D. Hargett, E. and Zumberge, J. (2009). An ecological assessment of USEPA Region 8 streams and rivers. U.S. Environmental Protection Agency Region 8 Report, 178 p.

Stoddard, J. L., Peck, D. V., Olsen, A. R., Larsen, D. P., Van Sickle, J., Hawkins, C. P., Hughes, R. M., Whittier, T. R., Lomnicky, G. A., Herlihy, A. T., Kaufman, P. R., Peterson, S. A., Ringold, P. L., Paulsen, S. G., and Blair, R. (2005). Environmental Monitoring and Assessment Program (EMAP) western streams and rivers statistical summary. U.S. Environmental Protection Agency Report 620/R-05/006, 1,762 p.

Stoddard, J. L., Peck, D. V., Paulsen, S. G., Van Sickle, J., Hawkins, C. P., Herlihy, A. T., Hughes, R. M., Kaufman, P. R., Larsen, D. P., Lomnicky, G. A., Olsen, A. R., Peterson, S. A., Ringold, P. L., and Whittier, T. R. (2005). An ecological assessment of western streams and rivers. U.S. Environmental Protection Agency Report 620/R-05/005, 49 p.