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Filamentous Green Algae (Pleurastrum terricola) floats on the surface of a pond in Clarence, Mo in September. Oxygen bubbles from the photosynthesis enables it to float on the surface. The amount of algae is often the result of excess nutrients like nitrogen and phosphorus in the pond. Given that the pond was in rural Missouri and close to farmland, the excess nutrients could be the result of runoff containing fertilizer. Green algae covered about a quarter of the pond and was thick enough for bullfrogs to sit on top of it. Extensive algae can be harmful to the ecosystem of the pond by limiting other organisms' access to oxygen and sunlight.
The tops of some of the rock formations at Bean Hollow have these awesome growths of algae/lichen/moss. I didn't see the spider web in this one until I got the picture on the computer. I really like the tiny orange cup ones.
This detailed view (backlit by natural sunlight) shows the translucency of the paper/acrylic film which has dried on the crocheted wire.
This green algae (Trentepohlia) is red-colored due to carotene content. It grows profusely on the rare Monterrey cypresses (Cupressus macrocarpa) at Point Lobos, California. Feb 25, 2007.
This is particularly interesting, because this genus of green algae is known to associate with fungi to create a number of lichens, including, quite remarkably, the false orchil, which also grows in profusion in this self-same cypress grove! It makes one wonder if the lichen is using the same species of alga as you see growing on its own here.
The heavy food load and warm summer pond temperatures at Horsethief Canyon Native Fish Facility cause dynamic algae blooms which add dissolved oxygen to the water as photosynthesis occurs.
Photo: Brandee Keuer/USFWS
For more images by Jessi Kingan, visit Beneath The Surface Photography at beneaththesurfacephoto.com and Photo and Travel Blog at beneaththesurface.me
Providing protection and shade to underwater species.
If you notice carefully you can see different colors in the algae.
Snow algae (Chlamydomonas nivalis), also known as watermelon snow or blood snow, was first thought to be meteorite dust. During a British expedition in 1818 to locate the Northwest Passage, Captain John Ross came across large patches of red snow near Greenland’s Cape York. It was incorrectly identified as iron-nickel meteorite detritus until Scottish Botanist, Robert Brown, suggested the red coloured snow could be due to an algae. Today there are over 60 known species of snow algae.
AT NREL, A RESEARCHER SORT TEST TUBES SAMPLES WITH YELLOW AND GREEN ALGAE.
The researcher helps NREL create innovated ways to measure the oil content of algae strains.
For more information or additional images, please contact 202-586-5251.
This is the algae I sampled today and from which the preceding micrograph in my photo stream was taken.
Photographed using a Sony Alpha 7R using a Nikkor PB-4 bellows and a Nikkor-Q 135mm f/4 bellows lens.