• Category
  • Length Range
    35.0-75.0 µm
  • Width Range
    2.5-4.5 µm

Identification

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

Original Description

  • Author
    W.Sm. 1853

Original Images

Reversatext

EMAP Assessment

EMAP Distribution

Nitzschia Reversa  Smith 3
Map 3

Response Plots

Nitzschia Reversa  Smith

Citations & Links

Links

  • Index Nominum Algarum
  • CAS
  • North American Diatom Ecological Database
    NADED ID: 48174

Cite This Page

Kociolek, P. (2011). Nitzschia reversa. In Diatoms of North America. Retrieved July 22, 2018, from https://diatoms.org/species/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.