Platessa bahlsii | Species - Diatoms of North America

Category

Monoraphid
Length Range

3.6– 11.0 µm
Width Range

2.9–4.2 µm
Striae in 10 µm

12–15

Synonyms

Planothidium bahlsii (M. Potapova) M.S. Kulikovskiy 2020

Contributor

Marina Potapova - Jan 2012
Reviewer

Loren Bahls - Jan 2012

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Identification

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Description

Valves are elliptic. Raphe valve has a narrow linear axial area and a small central area. Raphe is filiform, straight, with slightly expanded distal and proximal ends. Rapheless valve has a linear–lanceolate axial area. Striae are multiseriate, radiate. There are four rows of areolae per stria on the raphe valve, and three rows per stria on the rapheless valve.

Autecology

Platessa bahlsii appears to be a common species in nutrient-rich streams of the eastern US.

Size Range, µm3

11-100
Motility

Slightly motile
Attachment

Unattached
Habitat

Benthic
Colony

Solitary
Waterbody

Inland
Distribution

Southeast rivers 2014 California coastal rivers 2017
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Original Description

Author

Potapova 2012
Length Range

3.6-11.0 µm
Width

2.9-4.2 µm
Striae in 10µm

12-15

Original Images

Citations & Links

Citations

Cite This Page

Potapova, M. (2012). Platessa bahlsii. In Diatoms of North America. Retrieved December 11, 2024, from https://diatoms.org/species/48153/platessa_bahlsii

Responses

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