Thalassiosira weissflogii | Species - Diatoms of North America

Category

Centric
Diameter

10-20 µm

Synonyms

Eupodiscus weissflogii Grunow in Van Heurck 1882-1885
Conticribra weissflogii (Grunow) Stachura-Suchoples and D.M.Williams 2009

Contributor

Pat Kociolek - Mar 2011
Reviewer

Sam Rushforth - Sep 2011

Compare

Identification

View image metadata

Description

Valves are round, flat, with short mantles. The frustules are relatively lightly silicified. Areolae are fine and details of their structure are not visible with the light microscope. A ring of marginal fultoportulae, with small external openings, are present. Three to six central fultoportulae are present near the center of the valve face. A single, prominent rimoportula is present on the margin of the valve.

Autecology

Thalassiosira weissflogii is a planktonic diatom which commonly forms chains of widely spaced cells.

Size Range, µm3

101-1000
Motility

Non-motile
Attachment

Unattached
Habitat

Planktonic
Colony

Colonies occasional
BCG

BCG 4
Waterbody

Inland Lakes Marine
Distribution

Western rivers 2004 Southeast rivers 2014 California coastal rivers 2017
Learn more about this

Original Description

Basionym

Micropodiscus weissflogii
Author

Grunow in Van Heurck 1880

Citations & Links

Citations

Cite This Page

Kociolek, P. (2011). Thalassiosira weissflogii. In Diatoms of North America. Retrieved December 16, 2024, from https://diatoms.org/species/46475/thalassiosira_weissflogii

Responses

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