Diatoms of North AmericaDiatoms of North America

Nitzschia dissipata

(Kütz.) Rabenh. 1860

Nitzschia Dissipata Guide
  • Category
    Nitzschioid
  • Length Range
    11.9-72 µm
  • Width Range
    2.9-8 µm
  • Striae in 10 µm
    32-50

Identification

Nitzschia dissipata LM6 Nitzschia dissipata LM2 Nitzschia dissipata LM4 Nitzschia dissipata LM3 Nitzschia dissipata LM5 Nitzschia dissipata LM1
View image metadata
Nitzschia dissipata SEM2 Nitzschia dissipata SEM1 Nitzschia dissipata SEM3 Nitzschia dissipata SEM4

Description

Valves linear to lanceolate, with rostrate ends slightly to strongly protracted. Length is 11-72 µm, width 3-8 µm. The canal raphe is prominent and slightly eccentric, or may be positioned central axis of the valve. Fibulae are distinct and parallel to the transapical axis. Interspaces of the fibulae are rectangular to square, 5-12 in 10 µm. A conopeum is present and recognizable under LM as two parallel lines on either side of the raphe. Transapical striae are not discernable or only faintly visible under the light microscope. Viewed with SEM, striae number 32-50 in 10 µm. Each stria is composed of a single row of small round to oval areolae (40-70 in 10 µm). The terminal raphe fissure is hooked and sometimes projects widened or bifurcate in LM.

Original Description

  • Basionym
    Synedra dissipata
  • Author
    Kütz. 1844

Original Images

Synedra Dissipata Kutz 1844 Drawing
Synedra Dissipata Kutz 1844

Cite This Page

Manoylov, K. (2010). Nitzschia dissipata. In Diatoms of North America. Retrieved April 23, 2024, from https://diatoms.org/species/nitzschia_dissipata

Responses

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