Identification

Description

Valves are slightly asymmetrical to the apical axis, with both the dorsal and ventral margins slightly convex. The apices are protracted, relatively narrow and short. The axial area is very narrow, linear. A central area is absent. The raphe is slightly arched, filiform, with external proximal ends dilated slightly. Striae are radiate to nearly parallel.

Autecology

Original Description

  • Author
    Krammer and E.Reichardt 1997
  • Length Range
    10-26 µm
  • Width
    3.4-4.5 µm
  • Striae in 10µm
    23-26

Original Images

Krammer 1997 Tafel 144
Krammer 1997 P96

EMAP Assessment

EMAP Distribution

Encyonopsis Subminuta  Krammer Et  Reichardt 3
Map 3

Response Plots

Encyonopsis Subminuta  Krammer Et  Reichardt

Citations & Links

Cite This Page

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

Responses

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