• Category
  • Length Range
    30.0-100.0 µm
  • Width Range
    3.0-4.0 µm

Identification

Description

The central part of the valve has nearly parallel sides and a sharp tapering. The extended distal portions of the valve are tapered towards fine apices. The fibulae are fine and restricted to the margin, with a density 16-21 in 10 µm. The striae are not visible with light microscopy.

Autecology

Original Description

  • Basionym
    Synedra acicularis
  • Author
    Kütz. 1844

Original Images

Synedra acicularis orig illus

EMAP Assessment

EMAP Distribution

Nitzschia Acicularis   Kùtzing   Smith 3
Map 3

Response Plots

Nitzschia Acicularis

Cite This Page

Kociolek, P. (2011). Nitzschia acicularis. In Diatoms of North America. Retrieved August 18, 2018, from https://diatoms.org/species/nitzschia_acicularis

Responses

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