• Category
  • Length Range
    85-110 µm
  • Width Range
    17-19 µm
  • Striae in 10 µm
    5-6 at the center, 6-8 at the ends

Identification

Description

Valves are lanceolate, with apices are broadly rounded, but not protracted. The axial area is narrow and straight, widening to form a rounded to sometimes nearly rectangular central area. The raphe is straight and filiform, with external proximal raphe ends dilated slightly and rounded. Distal raphe ends are hook-like. Striae are distinctly lineate and radiate along most of the valve, becoming parallel to convergent at the apices.

Autecology

Original Description

  • Author
    Kütz. 1844

Updates

Aug 19, 2018 - Correction to basionym

The basionym was incorrectly listed as Pinnularia peregrina Ehrenberg. It was corrected to N. vulpina Kützing and the INA and CAS links were also corrected. - S. Spaulding

Cite This Page

Kociolek, P. (2011). Navicula vulpina. In Diatoms of North America. Retrieved August 19, 2018, from https://diatoms.org/species/navicula_vulpina

Responses

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