Caloneis silicula | Species - Diatoms of North America

Category

Symmetric Biraphid
Length Range

27-45 µm
Width Range

5-7 µm
Striae in 10 µm

14-20

Contributor

Pat Kociolek - Mar 2011
Reviewer

Sam Rushforth - Sep 2011

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Identification

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Description

Valves are linear and biconstricted, with apices rounded. Axial area narrow, broadening to a transverse fascia with lunate thickenings on either side of the central area. The raphe is lateral and arched slightly. The striae are radiate to parallel. A fine longitudinal line is present.

The concept for this species embraced by Krammer and Lange-Bertalot (1986) is quite broad, encompassing what appear to be many taxa. The type specimens of Ehrenberg have yet to be assessed, and this may be crucial to our understanding of the species.

Autecology

Size Range, µm3

101-1000 1001-10000
Motility

Moderately motile
Attachment

Prostrate
Habitat

Benthic
Colony

Solitary
BCG

BCG 3
Waterbody

Inland
Distribution

Western rivers 2004 Southeast rivers 2014 California coastal rivers 2017 Northeast lake sediments Great Lakes inventory
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Original Description

N. Silicula, testula linearis elongata , a dorso aequaliter trinodis, nodo uno medio, duobus apicalibus, hinc apicibus obtusissimis.

Basionym

Navicula silicula
Author

Ehrenb. 1843

Original Images

Citations & Links

Citations

Cite This Page

Kociolek, P. (2011). Caloneis silicula. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/46347/caloneis_silicula

Responses

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