Nitzschia reversa | Species - Diatoms of North America

Category

Nitzschioid
Length Range

35.0-75.0 µm
Width Range

2.5-4.5 µm

Contributor

Pat Kociolek - Sep 2011
Reviewer

Kalina Manoylov - Jul 2012

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Identification

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Description

The valves are spindle shaped, with parallel margins and abruptly tapering apices with the ends turned in opposite directions. The fibulae are small and evident along the length of the valve, with a density of 14-20 in 10 µm. The central nodule is evident. Striae are not visible in the light microscope.

Autecology

Size Range, µm3

101-1000
Motility

Moderately motile
Attachment

Unattached
Habitat

Benthic
Waterbody

Inland
Distribution

Western rivers 2004 California coastal rivers 2017
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Original Description

Author

W.Sm. 1853

Original Images

Citations & Links

Citations

Smith, W. (1853) Synopsis of British Diatomaceae John Van Voorst, London 1853. 89 pp., pls 1-31

Cite This Page

Kociolek, P. (2011). Nitzschia reversa. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/46833/nitzschia_reversa

Responses

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