Nitzschia oregona | Species - Diatoms of North America

Category

Nitzschioid
Length Range

15-42 µm
Width Range

3 µm
Striae in 10 µm

23-25

Contributor

Pat Kociolek - Feb 2011
Reviewer

Rex Lowe - Sep 2011

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Identification

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Description

Valves are linear-lanceolate, with subrostrate to obtuse-capitate apices. The keel is constricted in the middle of the valve, with fibulae numbering 9-12 in 10 µm. There are two enlarged fibulae in the central valve. Striae are finely punctate.

This species has been reported only from Oregon.

Autecology

Size Range, µm3

101-1000
Motility

Moderately motile Highly motile
Attachment

Prostrate
Habitat

Benthic
Colony

Solitary
BCG

BCG 2
Waterbody

Inland
Distribution

California coastal rivers 2017
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Original Description

Author

Sovereign 1958
Length Range

15-42 µm
Width

3 µm
Striae in 10µm

23-25

Original Images

Citations & Links

Citations

Sovereign, H.E. (1958) The diatoms of Crater Lake, Oregon Transactions of the American Microscopical Society 77(2):96-134.

Cite This Page

Kociolek, P. (2011). Nitzschia oregona. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/45750/nitzschia_oregona

Responses

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