Karayevia clevei

(Grunow) Bukhtiyarova 1999      Category: Monoraphid
BASIONYM: Achnanthes clevei Grunow in Cleve & Grunow 1880

Karayevia amoena

 

Karayevia laterostrata
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LM scalebar = 10 µm = 80 pixels.

Observations

Contributor: Marina Potapova - November 2010
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

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.

Original Description

Basionym: Achnanthes clevei
Author: Grunow in Cleve & Grunow 1880
Length Range: µm
Striae in 10 µm: 18-24 on raphe valve, 9-11 on rapheless valve

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.

Original Images

Cite This Page:
Potapova, M. (2010). Karayevia clevei. In Diatoms of the United States. Retrieved June 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/karayevia_clevei

Species: Karayevia clevei

Contributor: Marina Potapova

Reviewer: Rex Lowe

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Image Credit: Marina Potapova

  1. Valves lanceolate
  2. Striae denser on raphe valve than on rapheless valve
  3. Striae on rapheless valve coarsely punctate, parallel
  4. Striae on raphe valve radiate

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. Striae on raphe valve are radiate, 18-24 in 10 µm; shortened marginal striae are often present. 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.

Compare

Karayevia clevei differs from K. laterostrata in having lanceolate valves with rounded to subrostrate apices. Valves of K. laterostrata are elliptical with narrowly capitate to subcapitate apices.

Karayevia laterostrata

Citations

Bukhtiyarova, L.N. (2006). Additional data on the diatom genus Karayevia and a proposal to reject the genus Kolbesia. Nova Hedwigia Beiheft 130: 85-96.

Bukhtiyarova, L. (1999). Diatoms of Ukraine inland waters. National Academy of Sciences of Ukraine, M.G. Kholodny Institute of Botany, Kyiv, Ukraine. 133 pp.

Cleve, P.T. and Grunow, A. (1880). Beiträge zur Kenntniss der Arctischen Diatomeen. Kongliga Svenska-Vetenskaps Akademiens Handlingar, Vol: 17, Issue: 2, 121 pp., 7 pls.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Karayevia clevei CAS

North American Diatom Ecological Database (NADED)

NADED ID: 125001

Autecology Discussion

Habits

Size Range

101-1000 µm3 (ie Amphora veneta)

Motility

slightly motile (e.g. Cocconeis)

Attachment

prostrate (e.g. mucilage pad)

Habitat

benthic

Colony

solitary

EMAP Assessment

Sampling for the Environmental Protection Agency (EPA) western Environmental Monitoring and Assessment Program (EMAP) study was completed during the years 2000-2004 (see citations at bottom of this page). Streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming). Over 1200 sites on streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming) were selected for sampling based on a stratified randomized design. This type of design insures that ecological resources are sampled in proportion to their actual geographical presence. Stratified randomized design also allows for estimates of stream length with a known confidence in several “condition classes” (good or least-disturbed, intermediately-disturbed, and poor or most-disturbed) for biotic condition, chemistry and habitat.

EMAP Distribution

Karayevia clevei

Distribution

The distribution map represents the relative abundance of this Karayevia clevei in the western EMAP study. Relative abundance is a measure of the proportion of cells of this species based on a "fixed count" of 300 total diatom cells counted and identified. Each of the western EMAP sample sites is shown, either with a black dot for sites where Karayevia clevei was not recorded, or with a red circle indicating the relative abundance of Karayevia clevei.

Note that the size of the proportional symbols varies between species to help show both abundant and rare species.

Scale for the map to the left

EMAP Response Plots

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.

EMAP citations

Results are published in:

Johnson, T., Hermann, K., Spaulding, S., Beyea, B., Theel, C., Sada, R., Bollman, W., Bowman, J., Larsen, A., Vining, K., Ostermiller, J., Petersen, D. Hargett, E. and Zumberge, J. (2009). An ecological assessment of USEPA Region 8 streams and rivers. U.S. Environmental Protection Agency Region 8 Report, 178 p.

Stoddard, J. L., Peck, D. V., Olsen, A. R., Larsen, D. P., Van Sickle, J., Hawkins, C. P., Hughes, R. M., Whittier, T. R., Lomnicky, G. A., Herlihy, A. T., Kaufman, P. R., Peterson, S. A., Ringold, P. L., Paulsen, S. G., and Blair, R. (2005). Environmental Monitoring and Assessment Program (EMAP) western streams and rivers statistical summary. U.S. Environmental Protection Agency Report 620/R-05/006, 1,762 p.

Stoddard, J. L., Peck, D. V., Paulsen, S. G., Van Sickle, J., Hawkins, C. P., Herlihy, A. T., Hughes, R. M., Kaufman, P. R., Larsen, D. P., Lomnicky, G. A., Olsen, A. R., Peterson, S. A., Ringold, P. L., and Whittier, T. R. (2005). An ecological assessment of western streams and rivers. U.S. Environmental Protection Agency Report 620/R-05/005, 49 p.