Nitzschia sociabilis | Species - Diatoms of North America

Category

Nitzschioid
Length Range

22.4-49.5 µm
Width Range

3.5-4.5 µm
Striae in 10 µm

> 35

Contributor

Kalina Manoylov - Oct 2011
Reviewer

Marina Potapova - Oct 2011

Identification

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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.

Autecology

Size Range, µm3

101-1000
Motility

Highly motile
Attachment

Unattached Tube-Forming
Habitat

Benthic
Colony

Solitary
BCG

BCG 4
Waterbody

Inland
Distribution

Western rivers 2004 Southeast rivers 2014 California coastal rivers 2017
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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

Citations & Links

Citations

Hustedt, F. (1957) Die Diatomeenflora des Flußsystems der Weser im Gebiet der Hansestadt Bremen. Abhandlungen des Naturwissenschaftlichen Verein zu Bremen 34(3):181-440.

Cite This Page

Manoylov, K. (2011). Nitzschia sociabilis. In Diatoms of North America. Retrieved December 16, 2024, from https://diatoms.org/species/44671/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.