dms1535's Identifications

Water sample (freshwater) was taken on 2024-08-17 using a turkey baster.

freshwater creek sample

Sunlit water extract from garden soil.

Periphyton from an abandoned phosphate ore quarry: pH = 5,1; Сm(NO₃⁻) ~ 170 ppm.

Periphyton from a small peat lake: pH = 6,5; Сm(NO₃⁻) ~ 90 ppm.

Magnification of all photos: 400×
Habitat: water squeezed from Spirogyra growing along the edge of a lake.
Using stage micrometer for calibration, estimated to be about 160 µm from end to end.

640x

Video https://youtu.be/wROSboY3V74

L=125 um
I couldn't squish this fellow more since there were a number of thicker Algae specimens on the slide. Couldn't figure out the shape of the ventral scales but hopefully someone else can.

Peryphyton from an oxbow lake; pH = 6,3; Сm(NO₃⁻) ~ 110 ppm.

Intermediate swamp; pH = 6,7; Сm(NO₃⁻) ~ 50 ppm.

Peryphyton from an oxbow lake; pH = 5,7; Сm(NO₃⁻) ~ 150 ppm.

640x

It was squashed when the water dried (3-6 photos)

Collected in eutrophic pond water among floating aquatic plants and surface water. 8/3/2024, Dane County, Wisconsin.

From sample taken 8/3/2024