Navicula salinarum

Grunow 1880      Category: Symmetrical biraphid
BASIONYM: Navicula salinarum Grunow 1880
SYNONYM(S): Schizonema salinarum (Grunow) Kuntze 1898 

Navicula rostellata

 

Navicula schmassmannii
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LM scalebar = 10 µm = 80 pixels.

Observations

Contributor: Pat Kociolek - March 2011
Length Range: 23-35 µm
Width Range: 8-9 µm
Striae in 10 µm: 13-17

Description

Valves are broadly elliptical-lanceolate with produced, rostrate ends. The axial area is straight and relatively narrow, enlarging to form an elliptical to elliptical-lanceolate central area. The central area is formed by alternating long and short striae in the center of the valve. Striae are lineate, radiate, and arched, becoming parallel near the apices.

While the valve lengths we have seen are similar to those of Patrick and Reimer, we have not seen specimens as wide (they report widths up to 12 µm).

Original Description

Basionym: Navicula salinarum
Author: Grunow 1880
Length Range: 23-37 µm
Striae in 10 µm: 14-16

Original Description

Schalen breit lanzettlich mit stumpf zugespitzten oder fast kopfförmigen Enden. Querstreifen wie bei N. Bottnica, in der Mitte radial, abwechselnd verkürtz, and den Enden die radiale Richtung verleirend, 14-16 in 0,01 mm., in der Mitte etwas entfernter. Lange 0,023-0,037 mm., Schaalenbreite 0,01-0,012 mm.

Original Images

Cite This Page:
Kociolek, P. (2011). Navicula salinarum. In Diatoms of the United States. Retrieved May 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/navicula_salinarum

Species: Navicula salinarum

Contributor: Pat Kociolek

Reviewer: Mark Edlund

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Image Credit: Pat Kociolek

  1. Valves broadly elliptical-lanceolate
  2. Ends produced, rostrate
  3. Valves are 23-35 µm long, 8-9 µm broad
  4. Central area is formed by alternating long and short striae

Valves are broadly elliptical-lanceolate with produced, rostrate ends. The elliptical to elliptical-lanceolate central area is formed by alternating long and short striae in the center of the valve. The striae are lineate, radiate, arched, becoming parallel near the apices.

Compare

This species is distinguished from other lineolate Navicula species by the shape of the valves, the protracted apices and the length to width ration (relatively low). Navicula trivialis has subrostrate apices, an elliptical central area bounded by mostly shortened striae (not alternating long-short striae) and has visible lineolae.

Navicula trivialis

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.

Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.

Links & ID's

Index Nominum Algarum (INA)

INA

California Academy of Sciences (CAS)

Navicula salinarum CAS

North American Diatom Ecological Database (NADED)

NADED ID: 46389

Autecology Discussion

Habits

Size Range

101-1000 µm3 (ie Amphora veneta)

Motility

moderately motile (e.g. Navicula tripunctata)

Attachment

prostrate (e.g. mucilage pad)

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 salinarum

Distribution

The distribution map represents the relative abundance of this Navicula salinarum 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 salinarum was not recorded, or with a red circle indicating the relative abundance of Navicula salinarum.

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 salinarum

Responses

The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Navicula salinarum 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.