Microlife: Fish Creek Park - Algae from shallow marsh

Jul 23-25, 2009
Video: wetland microlife 4 of 14 clips

This was a small and partly dried marshy spot in Fish Creek Park. The water was filled with algae in grey-green clumps, one of which was taken from around some fallen branches. A bright green tuft was almost all Spirogyra, while some duckweed with long roots had Mougeotia growing on them. The rest was a loose dirty mix with both.

Marsh

There were many small crustaceans visible along the walls of the container, mainly chydorids but also some larger cyclopoids with eggs, ostracods, and Simocephalus. There were several sorts of fly larvae active at the surface, and also a larger cranefly larva below, but it was possibly moribund and soon perished.

The algae and debris were home to countless small oval ciliates, crawling and sometimes darting along surfaces, accompanied by Halteria and some Caenomorpha. There were also many scattered algae, mainly Cosmarium, small Closterium, single nostocacean filaments, and needle-like or curved diatoms.

There were many Chaetonotus on the duckweed and rotifers throughout the sample, most notably Lecane, larger Lepadella, and Squatinella. A variety of naked and shelled Amoebozoa also occurred, and several Actinophrys. Zoochlorellae were also common, occurring in Euplotes, Paramecium, and some detaching vorticellids.

↬ Thanks to protistologist Dr. Ferry Siemensma, author of Microworld, for the identification of Netzelia.

Kingdom Bacteria
…Phylum Cyanobacteria – blue-green algae

Nostocaceae
Nostocaceae - about 4 µm wide

Kingdom Plantae
…Phylum Chlorophyta – green algae

Scenedesmaceae
Scenedesmaceae - about 25 µm
Mougeotia
Mougeotia - about 25 µm wide
Mougeotia
Mougeotia - about 45 µm wide
Spirogyra
Spirogyra - about 35, 25 µm wide
Closterium
Closterium - about 130 µm
Closterium
Closterium - about 265 µm
Closterium
Closterium - about 275 µm
Cosmarium
Cosmarium - about 25 µm
Cosmarium
Cosmarium - about 75 µm

Kingdom Chromista
…Phylum Ciliophora – ciliates

Euplotes
Euplotes - body about 95 µm
Halteria
Halteria - body about 25 µm
Spirotrich
Spirotrichea - body about 90 µm
Spirotrich
Spirotrichea - body about 130 µm
Spirotrich dividing
Spirotrichea, dividing - halves about 65-70 µm
Spirotrich
Spirotrichea - body about 175 µm
Caenomorpha
Caenomorpha - body about 70 µm
Phyllopharyngea
Phyllopharyngea - about 80 µm
Ciliates
Ciliophora - about 30 µm
Ciliate
Ciliophora - about 70 µm
Peniculida
Peniculida - about 110 µm
Paramecium
Paramecium - about 100 µm
Vaginicolid
Vaginicolidae - about 55 µm
Vaginicolids
Vaginicolidae - fronts about 40 µm wide
Vorticellid
Vorticellidae - body about 50 µm
Vorticellid
Vorticellidae - body about 65 µm

…Phylum Ochrophyta – heterokont algae

Actinophrys
Actinophrys - body about 65 µm
Actinophrys
Actinophrys - bodies about 70 µm
Diatom
Diatomeae - about 85 µm
Diatom
Diatomeae - about 75 µm
Nitzschia
Nitzschia - about 360 µm

Kingdom Protozoa
…Phylum Euglenozoa

Euglenozoa
Euglenozoa - body about 30 µm
Euglena
Euglena - about 130 µm

…Phylum Amoebozoa

Thecamoeba
Thecamoeba - about 60 µm
Mayorella
Mayorella - about 80 µm
Tubulinea
Tubulinea - about 140 µm
Tubulinea
Tubulinea - about 165 µm
Netzelia
Netzelia - shell about 100 µm
Arcellinid
Arcellinida - shell about 70 µm
Arcellinid
Arcellinida - shell about 170 µm

Kingdom Animalia
…Phylum Gnathifera – rotifers & allies

Bdelloid
Bdelloida - body about 65 µm wide
Squatinella
Squatinella - about 185 µm
Lepadella
Lepadella - body about 90 µm
Lepadella
Lepadella - about 185 µm
Ploima
Ploima - about 85 µm
Ploima
Ploima - body about 140 µm
Lecane
Lecane - body about 135 µm
Lecane
Lecane - about 215 µm
Trichotria
Trichotria - about 330 µm
Platyias
Platyias - about 230 µm
Platyias
Platyias - about 370 µm

…Phylum Gastrotricha

Chaetonotus
Chaetonotus - about 125 µm

…Phylum Nematoda – roundworms

Roundworm, Tubulinea
Nematoda, Tubulinea - about 480, 95 µm

…Phylum Arthropoda – insects, crustaceans & allies

Podocopid
Podocopida - body about 170 µm
Podocopid
Podocopida - body about 715 µm
Cyclopoid
Cyclopoida - body about 910 µm
Copepod larva
Copepoda, larva - body about 150 µm
Copepod larva
Copepoda, larva - body about 275 µm
Simocephalus
Simocephalus - body about 1.1 mm
Chydorid
Chydoridae - about 280 µm
Chydorid
Chydoridae - about 310 µm
Mosquito larva
Culicidae, larva - about 2.4 mm
Punkie larva
Ceratopogonidae, larva - about 3.7 mm
Crane fly larva
Tipulidae, larva - about 3.4 mm

Uncertain objects

Unknown
Non-moving branched object - about 2-4 µm wide