Nupela carolina | Species - Diatoms of North America

Category

Symmetric Biraphid
Length Range

5-15 µm
Width Range

2.4-4.4 µm
Striae in 10 µm

42-54

Contributor

Marina Potapova - Oct 2010
Reviewer

Sarah Spaulding - Nov 2010

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Identification

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Description

Valves elliptical-lanceolate. The smallest cells may become oval. Frustule slightly bent in girdle view. The distance between central raphe endings is slightly longer on the convex valve than on the concave valve. Terminal raphe fissure forming a curved opening to the primary side of the valve. Axial area linear, narrow. Central area square or lyre-shaped, formed by interrupted central striae, often with several isolated areolae, appearing convex under LM. Transapical striae radiate, 42-54 in 10 μm. Outer areolae openings are slightly transapically elongate, covered by hymenes lying flush with the valve surface. Inner openings of areolae are small, round or oval foramina.

Autecology

Size Range, µm3

11-100
Motility

Slightly motile
Attachment

Unattached
Habitat

Benthic
Colony

Solitary
Waterbody

Inland
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Original Description

Valves elliptical-lanceolate, 5-15 μm long, 2.4-4.4 μm wide. The smallest cells may become oval. Frustule slightly bent in girdle view. The distance between central raphe endings is slightly longer on the convex valve than on the concave valve. Terminal raphe fissure forming a curved opening to the primary side of the valve. Axial area linear, narrow. Central area square or lyre-shaped, formed by interrupted central striae, often with several isolated areolae, appearing convex under LM. Transapical striae radiate, 42-54 in 10 μm. Outer areolae openings are slightly transapically elongate, covered by hymenes lying flush with the valve surface. Inner openings of areolae are small, round or oval foramina.

Author

Potapova and Clason 2003
Length Range

5-15 µm
Width

2.4-4.4 µm
Striae in 10µm

42-54

Original Images

Original text and images reproduced with permission by the author.

Citations & Links

Citations

Potapova, M., Ponander, K.C., Lowe, R.L., Clason, T.A. and Bahls, L.L. (2003) Small-celled Nupela species from North America Diatom Research 18: 293-306

Cite This Page

Potapova, M. (2010). Nupela carolina. In Diatoms of North America. Retrieved December 16, 2024, from https://diatoms.org/species/44866/nupela_carolina

Responses

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