Karayevia clevei | Species - Diatoms of North America

Category

Monoraphid
Length Range

10-28 µm
Width Range

5.0-8.2 µm
Striae in 10 µm

9-12 on rapheless valve, 18-24 on raphe valve

Contributor

Marina Potapova - Nov 2010
Reviewer

Rex Lowe - Feb 2011

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Identification

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Description

Valves are lanceolate with rounded to subrostrate apices. The raphe valve has a narrowly lanceolate axial area and no distinct central area. The raphe is straight, with terminal fissures deflected to the same side. The proximal raphe ends are slightly expanded externally. The proximal raphe ends are deflected toward opposite sides internally. Striae on raphe valve are radiate, 18-24 in 10 µm. Shortened marginal striae are often present in the middle part of the raphe valve. The areolae openings are transapical slits. The rapheless valve has a narrow linear axial area and no central area. Striae on rapheless valve are coarsely punctate, parallel in the center and slightly radiate at apices, 9-12 in 10 µm. The openings of the areolae are transapically elliptical.

Autecology

Size Range, µm3

101-1000
Motility

Slightly motile
Attachment

Prostrate
Habitat

Benthic
Colony

Solitary
BCG

BCG 3
Waterbody

Inland
Distribution

Western rivers 2004 Southeast rivers 2014 California coastal rivers 2017 Northeast lake sediments Great Lakes inventory
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Original Description

Klein, Schaalen breit lanzettlich mit stumpf vorgezogenen En-den. Querstreifen radial, in der Unterschaale 18—24, in der Oberschaale 9—11 in 0,01 mm., stark punktirt.

Basionym

Achnanthes clevei
Author

Grunow in Cleve and Grunow 1880
Striae in 10µm

18-24 on raphe valve, 9-11 on rapheless valve

Original Images

Citations & Links

Citations

Cite This Page

Potapova, M. (2010). Karayevia clevei. In Diatoms of North America. Retrieved December 16, 2024, from https://diatoms.org/species/45005/karayevia_clevei

Responses

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