Nupela fennica | Species - Diatoms of North America

Category

Symmetric Biraphid
Length Range

9-18 µm
Width Range

2.7-3.5 µm
Striae in 10 µm

35-40

Contributor

Marina Potapova - May 2010
Reviewer

Sarah Spaulding - Nov 2010

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Identification

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Description

Valves are linear-elliptical with subrostrate or rounded ends. Axial area is narrowly linear. Central area is rectangular fascia. Striae are radiate in the middle, parallel or slightly convergent at apices, 35-40 in 10 mm. Raphe is filiform, straight or very slightly curved, with slightly expanded external proximal endings.

Autecology

Size Range, µm3

11-100
Motility

Moderately motile
Attachment

Unattached
Habitat

Benthic
Colony

Solitary
Waterbody

Inland
Distribution

Northeast lake sediments
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Original Description

Frustula delicata. Valvae lineari-lanceolatae marginibus subconvexis, apicibus obstuse rotundatis vix protractis, circiter 14 µ longae, 4 µ latae. Rhape directa filiformis. Area axialis angustissima linearis, area centralis fascian latam marginem fere attengentem formans. Structura delicatissima, striae transaicales subradiantes, circiter 40 in 10 µ.

Basionym

Navicula fennica
Author

Hust. 1962
Length Range

14 µm
Width

3 µm
Striae in 10µm

40

Original Images

Citations & Links

Citations

Cite This Page

Potapova, M. (2010). Nupela fennica. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/44628/nupela_fennica

Responses

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