Jun 14-16, 2014
This was from a broad shallow puddle in a grassy field, taken a day after rain. The water was filmy and packed full of old brown strands, extending into a circle caked all around the rim, though with some longer green tufts growing through. The sample included some dead grass and other loose debris from near the edge.
The material was full of thin greenish filaments, especially toward the bottom, mainly cyanobacteria though various green algae were also present. Small Nostocales colonies were also reasonably widespread, and in places there were countless free-swimming bacteria, most curved and apparently divided in four.
Flagellates were common throughout including green euglenids and colonies like Pandorina and Synura. There were also widespread rotifers, notably Lecane and Lepadella, as well as some amoebae or shells like euglyphids and Arcella. Larger crustaceans included a variety of water fleas as well as copepods.
↬ Thanks to protistologist Dr. Ferry Siemensma, author of Microworld: world of amoeboid organisms, for confirming the identification of Clathrulina elegans shells and to phycologist Roman Romanov for confirming the identification of Oedogonium.
Ciliophora - about 45 µm
Ciliophora, dividing - halves about 110-115 µm
Spirotrichea - about 45 µm
Ciliophora - about 60 µm
Ciliophora - about 70 µm
Vorticellidae - body about 55 µm
Vorticellidae - body about 65 µm
Vorticellidae - body about 75 µm
- colonies about 35, 95 µm
Chrysophyceae - colony about 65 µm
Diatomeae - about 40, 60 µm
Diatomeae - about 30-40, 60, 80 µm
Diatomeae - about 110 µm
Non-moving branched object - about 3-4 µm wide
Non-moving rod, chain - about 20, 40 µm
Motile bacterial chains - about 4-9 µm
Algae on copepod moult - about 9-14 µm
Flagellates, Diatomeae - cells about 7, 20, 40 µm
Green flagellate - about 16 µm
Green flagellate, Diatomeae - about 24, 40, 60 µm
Non-moving algae - cells about 10-11 µm, 19 µm
Dark heliozoan-like - body about 50 µm
Very slow amoeba, Phacus
- bodies about 20, 45 µm
Small protozoan - about 26 µm
Gliding flagellate - about 24 µm
Layered granule - about 100 µm