Diatoms of North AmericaDiatoms of North America

Nitzschia sociabilis

Hust. 1957

Nitzschia Socialibis Guide
  • Category
    Nitzschioid
  • Length Range
    22.4-49.5 µm
  • Width Range
    3.5-4.5 µm
  • Striae in 10 µm
    > 35

Identification

Nitzschia sociabilis LM6 Nitzschia sociabilis LM2 Nitzschia sociabilis LM5 Nitzschia sociabilis LM7 Nitzschia sociabilis LM4 Nitzschia sociabilis LM3 Nitzschia sociabilis LM1
View image metadata
Nitzschia sociabilis SEM3 Nitzschia sociabilis SEM2 Nitzschia sociabilis SEM1

Description

Frustules are lightly silicified. In girdle view, valves are sigmoid and narrow. Girdle bands are absent. Valves are lanceolate to rhomboid with sharp apices. Striae are not resolvable with light microscopy. The fibulae are irregularly spaced and number 8-11 in 10 µm. Fibulae, however, are not widely spaced at the central part of the valve.

Original Description

German: Schalen typisch lanzettlich mit spitzen, nicht vorgezogenen Enden, 20-40 µm, lang, 3-4 µm breit. Kiel stark exzentrisch, Kielpunckte durchschnittlich etwa 10 in 10 µm, mehr oder weniger unregelmäßig gestellt, transapikal strichförmig. Struktur äußerst zart, bisher nicht aufgelöst. Abb.91-94.

Latin: Valvae lanceolatae apicibus acutis non protractis, 20-40 µm longae, 3-4 µm latae. Carina valde excentrica punctis carinalibus plus minusvae 10 in 10 µm, transapicaliter elongatis, irregulariter positis. Structura delicatissima, striae transapicales inconspicuae.

  • Author
    Hust. 1957
  • Length Range
    20-40 µm
  • Width
    3-4 µm

Original Images

Ni Sociab Drawing Hustedt 1957
Ni Sociab Describe Hustedt 1957 1

Citations & Links

Citations

Links

  • Index Nominum Algarum
    Original
  • North American Diatom Ecological Database
    NADED ID: 48225
  • Hustedt Collection
    Image
    Metadata

Cite This Page

Manoylov, K. (2011). Nitzschia sociabilis. In Diatoms of North America. Retrieved April 19, 2024, from https://diatoms.org/species/nitzschia_sociabilis

Responses

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