Karayevia suchlandtii

(Hustedt) Bukhtiyarova      Category: Monoraphid
BASIONYM: Achnanthes suchlandtii Hustedt 1933

Karayevia ploenensis var. gessneri

 

Kobayasiella jaagii
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LM scalebar = 10 µm = 80 pixels.

Observations

Contributor: Marina Potapova - May 2010
Length Range: 7-15 µm
Width Range: 3.6-5.3 µm
Striae in 10 µm: 18-20

Description

Valves are elliptical to linear-elliptical. The raphe valve has a lanceolate axial area and no distinct central area. The raphe is straight without terminal fissures. External proximal and distal raphe endings are slightly expanded. Striae in the middle of raphe valve are almost parallel, becoming radiate toward apices, 18-20 in 10 µm. The rapheless valve has a linear axial area and no central area. Striae on rapheless valve are interrupted by a longitudinal line at each side of the valve, they are slightly radiate or almost parallel in the valve center, becoming radiate toward apices, 18-20 in 10 µm. The vimines dividing areolae within striae on both raphe and rapheles valves are often incomplete, so that areolae are often partially fused. They are arranged in either uniseriate or biseriate striae, which are formed by offset double rows of areolae. The double rows are more often observed towards the valve margins.

Original Description

Basionym: Achnanthes suchlandtii
Author: Hustedt 1933
Length Range: 8-11 µm
Width Range: 3.5-4.5 µm
Striae in 10 µm: 22 in the center of the raphe valve

Original Description

Schalen elliptisch mit breit gerundeten Enden, 8-11 µ lang, 3,5-4,5 breit. Raphenlose Schalen mit leicht radialen Transpicalstreifen, etwa 22 in 10 µ, beiderseits der Mittellinie durch eine schmale, hyaline Furche (Längsrippe) unterbrochen; Pseudoraphe sehr eng, linear. Raphenschen mit gerader, faden förmiger Raphe; Axialarea sehr eng, um den Mittelknoten nicht merklich erweitert; Transapikalstreifen ebenfalls leicht radial, 22 in 10 µ, ohne Längsfurche (Fig. 859B).

Original Images

Cite This Page:
Potapova, M. (2010). Karayevia suchlandtii. In Diatoms of the United States. Retrieved May 24, 2013, from http://westerndiatoms.colorado.edu/taxa/species/karayevia_suchlandtii

Species: Karayevia suchlandtii

Contributor: Marina Potapova

Reviewer: Rex Lowe

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Image Credit: Marina Potapova

  1. Valves elliptical to linear-elliptical
  2. Central areas absent
  3. Striae almost parallel in the middle, radiate towards apices
  4. Striae on rapheless valve interrupted by a hyaline line

Valves are elliptical to linear-elliptical. The raphe valve has a lanceolate axial area and no distinct central area. The rapheless valve has a linear axial area and no central area. Striae in the middle are almost parallel, becoming radiate toward apices, 18-20 in 10 µm. Striae on rapheless valve are interrupted by a longitudinal line at each side of the valve.

Compare

Karayevia suchlandtii differs from K. nitidiformis by elliptical valve outline. K. nitidiformis has capitate valve ends. Note that K. nitidiformis has not been confirmed in US habitats.

Karayevia nitidiformis

(Lange-Bertalot) Bukhtiyarova

Citations

Hustedt, F. (1933). Die Kieselalgen Deutschlands, Österreichs und der Schweiz unter Berücksichtigung der übrigen Länder Europas sowie der angrenzenden Meeresgebiete. In: L. Rabenhorst (ed.), Kryptogamen Flora von Deutschland, Österreich und der Schweiz. Akademische Verlagsgesellschaft m.b.h. Leipzig, Vol. 7, Part 2, pp. 321-432.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Karayevia suchlandtii CAS

North American Diatom Ecological Database (NADED)

NADED ID: 125009

Autecology Discussion

Habits

Size Range

Motility

Attachment

Habitat

Colony

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 suchlandtii

Distribution

The distribution map represents the relative abundance of this Karayevia suchlandtii 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 suchlandtii was not recorded, or with a red circle indicating the relative abundance of Karayevia suchlandtii.

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 suchlandtii

Responses

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