Eunotia enischna | Species - Diatoms of North America

Category

Eunotioid
Length Range

15-19 µm
Width Range

2.4-2.6 µm
Striae in 10 µm

23-24 in the center valve, 24-25 at the ends

Contributor

Paula Furey - Mar 2011
Reviewer

Rex Lowe - Apr 2011

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Identification

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Description

Eunotia enischna valves are small and slender. The ventral margin is concave, and the dorsal margin is convex. The apices are defined by a marked change in slope on the dorsal margin. The apices are capitate, rounded, and dorsally recurved. The raphe is short and curves on to the valve face. Striae are indistinct and radiate. The areolae are unresolved in the LM.

Autecology

Eunotia enischna has been found on waterfalls and wetwalls in the Great Smoky Mountains National Park.

Size Range, µm3

11-100
Motility

Slightly motile
Habitat

Moist habitats
Waterbody

Inland
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Original Description

Valves slender, concave on the ventral margin, convex on the dorsal margin, with apices defined by a marked change in slope on the dorsal margin, 15 – 19 μm long, 2.4 – 2.6 μm wide. Apices capitate, rounded, dorsally recurved. Helictoglossae not visible in the light microscope. Rimoportula at one end of valve. Raphe short, curved on to valve face. Striae indistinct, radiate, 23 – 24 in 10 μm at the center of the valve, 24 – 25 in 10 μm near the ends. Puncta unresolved in the LM.

Author

Furey, Lowe and Johansen 2011
Length Range

15-19 µm
Width

2.4-2.6 µm
Striae in 10µm

23-24 in the center valve, 24-25 at the ends

Original Images

Citations & Links

Citations

Furey, P.C., Lowe, R.L. and Johansen, J.R. (2011) Eunotia Ehrenberg (Bacillariophyta) of the Great Smoky Mountains National Park, USA. Bibliotheca Diatomologica 56: 1-134

Cite This Page

Furey, P. (2011). Eunotia enischna. In Diatoms of North America. Retrieved December 16, 2024, from https://diatoms.org/species/46307/eunotia_enischna

Responses

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