• Category
  • Length Range
    60-150 µm
  • Width Range
    4-6 µm
  • Striae in 10 µm
    35-38

Identification

Description

Valves are linear to linear-lanceolate with parallel sides, except near the center of the side bearing the keel, which is concave. The apices are rounded and nearly capitate. The raphe is positioned excentrically, with a distinct central nodule. Fibulae vary in size and number 11-14 in 10 µm. Striae are resolvable and parallel. There are specimens in which the punctate nature of the striae is visible with LM.

Autecology

Original Description

  • Basionym
    Frustulia linearis
  • Author
    Agardh 0

EMAP Assessment

EMAP Distribution

Nitzschia Linearis   Agardh Ex  Smith   Smith 3
Map 3

Response Plots

Nitzschia Linearis   Agardh Ex  Smith   Smith

Cite This Page

Kociolek, P. (2011). Nitzschia linearis. In Diatoms of North America. Retrieved June 18, 2018, from https://diatoms.org/species/nitzschia_linearis

Responses

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