@karolina . Please help. Freshwater pond... This was moving and is very thick. Looks like a diatom, is very motile.
Diatom bloom (dark brown patches in the surf zone). Species responsible for these blooms on west coast North Island beaches include Attheya armata (syn. Chaetoceros armatus) and Aulacodiscus kittonii. Attheya armata is an important food of tuatua.
Or could be a Synedra.
This diatom, genus Gyrosigma, was found towards the middle of the Colorado River, on top of a shoal. The water was no more than 6 inches deep, and was moving at a moderate rate.
Gyrosigma species are symmetrical braphids that are sigmoid in shape, or shaped like an S-curve. Their striae are punctate, meaning they have tiny pores. The central area is circular or elliptical in shape ("Gyrosigma." Diatoms of the United States. University of Colorado, 2009. Web. 17 Nov. 2016.).
Photo - "Gyrosigma." Protist Images. Protist Information Server, n.d. Web. 17 Nov. 2016.
This diatom was found in a pool water sample taken from the Colorado River.
This is a Diatom that is a biraphid species. Valve ends may be capitate, acute, rounded, or not expanded. Navicula has about 86 known species within it's Genus.
This Diatom was found in a river below the dam for Proctor Lake.
Spaulding, S., and Edlund, M. (2008). Navicula. In Diatoms of the United States. Retrieved November 16, 2016, from http://westerndiatoms.colorado.edu/taxa/genus/Navicula
Diatoms are a major group of algae, and are among the most common types of phytoplankton. Most diatoms are unicellular, although they can exist as colonies in the shape of filaments or ribbons (e.g. Fragilaria), fans (e.g. Meridion), zigzags (e.g. Tabellaria), or stars (e.g. Asterionella). Diatoms are producers within the food chain. A unique feature of diatom cells is that they are enclosed within a cell wall made of silica (hydrated silicon dioxide) called a frustule....