• Category
  • Diameter
    6.24-18.12 µm
  • Striae in 10 µm
    7-8 (chambered striae by circumference)

Identification

Description

Valves are disc-shaped, with a narrow mantle. The valve face may be flat or transversely undulate. The central area is distinct and isolated from the marginal chambered striae. The central area covers 1⁄ 2 to 1⁄ 3 of the valve face. The central area contains 1-4 fultoportulae, which are distinct in LM. In the SEM, marginal fultoportulae are positioned on each costa. One to two rimoportulae are present near the valve margin, in line with a costa. Marginal spines may be present, positioned in line with each costa. The number of costae (interstriae) in 10 µm is 12-15.

Autecology

Cyclotella meneghiniana is wide spread and particularly common in shallow, nutrient rich waters.

2012 0057 1
Credit: Somayyeh Kheiri
Live cell of Cyclotella meneghiniana with 10 um scale bar.
Live4 2012 0057
Credit: Somayyeh Kheiri
Live cell of Cyclotella meneghiniana in girlde view with 10 um scale bar.
Iowa River Cyclotella Bloom
Credit: Rex Lowe
Bloom of diatoms in the Iowa River (Cyclotella meneghiniana dominant).

Original Description

  • Author
    Kütz. 1884
  • Length Range
    21 µm

Original Images

Cyclotella meneghiniana orig illus
Cyclotella meneghiniana orig descr

Cite This Page

Lowe, R, and Kheiri, S. (2015). Cyclotella meneghiniana. In Diatoms of North America. Retrieved July 21, 2018, from https://diatoms.org/species/cyclotella_meneghiniana

Responses

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