• Category
  • Length Range
    15-60 µm
  • Width Range
    8–12 µm
  • Striae in 10 µm
    50-60

Identification

Description

Cells form zig-zag colonies. Frustules are rectangular in girdle view. Valves are elliptical to elliptical-lanceolate with broadly rounded subrostrate ends, 8-12 µm wide, 15-60 µm long. Transapical ribs 6-10 in 10 µm. Striae uniseriate, 45-50 in 10 µm, consisting of small poroid areolae. The axial area is linear, very narrow. One rimoportula is present at one valve apex. Apical pore fields are present at both apices.

Autecology

Fresh and brackish water. Forms zig-zag colonies attached to the substrate by a mucilage pad.

Original Description

Cette petite espèce a ses segmens de forme quadrilatère, solitaires ou se tenant de deux à quatre enserable après leur disjonction, brunâtres vers le centre où plusieurs sont marqués de deux points ronds parfaitement transparens. Ces filamens, quand ils sont disposés en zin-zag, atteignent une ligne de longueur, mais l'oeil désarmé n'y saurait distinguier aucune organisation. Ils recouvrent fréquemment l'extremité des rameaux du Conferva glomerata, L., surtout aux endroits où le courant de l'eau est fort rapide, comme dans les écluses de moulins. Nous en avons trouvé en abondance sur des Conferves du Rhône, Il est jusque dans le bassin du Palais-Royal.

  • Author
    Bory 1824

Original Images

Diatoma vulgaris orig illus
Davulg  Orig Descr

EMAP Assessment

EMAP Distribution

D Vulgaris 10
Map 10

Response Plots

Diatoma Vulgaris

Cite This Page

Potapova, M. (2009). Diatoma vulgaris. In Diatoms of North America. Retrieved August 18, 2018, from https://diatoms.org/species/diatoma_vulgaris

Responses

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