Nitzschia recta
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Category
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Length Range48-85 µm
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Width Range4.7-7 µm
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Striae in 10 µm39-50
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SynonymsNitzschia vitrea var. recta (Hantzsch in Rabenh.; Grunow in Cleve and Grunow) Van Heruck
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ContributorKalina Manoylov - Jun 2010
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ReviewerMarina Potapova - Oct 2011
Identification
Description
Frustules are rectangular in girdle view. Valves are flat, linear to linear-lanceolate, with wedge-shaped ends. Apices are beak-like, rounded, and somewhat rostrate. The raphe is positioned at the valve margin. A conopeum is visible sometimes in LM. Striae are visible in large specimens. Fibulae are long (1-2 µm) and irregularly spaced, 6-8 in 10 µm.
Autecology
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Size Range, µm3
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Motility
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Attachment
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Habitat
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Colony
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BCG
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Waterbody
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Distribution
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Original Description
Original Images
Citations & Links
Links
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Index Nominum Algarum
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North American Diatom Ecological DatabaseNADED ID: 48029
Cite This Page
Manoylov, K. (2010). Nitzschia recta. In Diatoms of North America. Retrieved December 30, 2024, from https://diatoms.org/species/44663/nitzschia_recta
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Nitzschia recta 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.
Nitzschia recta
- Apices beak-like
- Valves > 40 µm in length
- Striae fine
Valves are linear to linear-lanceolate with beak-like apices. Valve length is greater than 40 µm. Valve ends are rostrate. Striae are fine and may be visible in LM only in larger specimens. Fibulae are perpendicular to the margin and irregularly spaced.