Microlife: Confederation Park - Rock from stream

Oct 3-4, 2008
Next sample

This park has a small shaded stream, which is actually run-off from a golf course. Earlier in the year there were some clumps of green algae, but at this point they had disappeared. This sample was from a sluggish part where fallen leaves were collecting. It included one of the rocks, which were covered in strings of brownish material that easily came apart when touched.

A few larger midge larvae had made tubes upon the rock. Otherwise the material included mainly rod-shaped diatoms, along with some other pennate kinds and Melosira filaments. Small naked amoebae were reasonably common, mostly finger-like Tubulinea and Actinophrys, but also some Heterolobosea and Mayorella.

Ciliates were also common, most notably Strobilidium, both swimming freely and caught on debris. There were also varying sizes of vorticellids, of flattened spirotrichs, and of free-living Phyllopharyngea, with the last sometimes seen feeding on diatoms. A few small bacterial films had round to star-shaped Dendrosoma attached.

↬ Thanks to ciliatologist Dr. Ivan Dovgal for the identification of Dendrosoma radians.

Kingdom Bacteria
…Phylum Cyanobacteria – blue-green algae

Oscillatoriales
Oscillatoriales - about 15 µm wide
Oscillatoriales
Oscillatoriales - about 7 µm wide

Kingdom Plantae
…Phylum Chlorophyta – green algae

Closterium
Closterium - about 230 µm
Closterium
Closterium - about 480 µm

Kingdom Chromista
…Phylum Ciliophora – ciliates

Aspidisca
Aspidisca - body about 35 µm
Strobilidium
Strobilidium - about 45 µm
Spirotrich
Spirotrichea - about 150 µm
Spirotrich
Spirotrichea - body about 105 µm
Spirotrich
Spirotrichea - about 115 µm
Amphileptus
Amphileptus - about 320 µm
Ciliate
Ciliophora - about 75 µm
Ciliate
Ciliophora - about 75 µm
Phyllopharyngea
Phyllopharyngea - about 95 µm
Phyllopharyngea conjugating
Phyllopharyngea, conjugating - about 95, 70 µm
Dendrosoma radians
Dendrosoma - body about 140 µm
Ciliate
Ciliophora - about 70 µm
Ciliate
Ciliophora - about 70 µm
Ciliate
Ciliophora - about 95 µm
Vorticellid
Vorticellidae - body about 55 µm

…Phylum Ochrophyta – heterokont algae

Actinophrys
Actinophrys - body about 70 µm
Melosira
Melosira - about 19 µm wide
Diatoms
Diatoma - cells about 45 µm long
Diatoms
Diatomeae - about 80-160 µm
Diatoms
Diatomeae - about 20-50 µm
Diatoms
Diatomeae - about 20-65 µm
Diatom
Diatomeae - about 90 µm
Diatom
Diatomeae - about 115 µm

Kingdom Protozoa
…Phylum Euglenozoa

Anisonema
Anisonema - body about 30 µm

…Phylum Percolozoa

Heterolobosea
Heterolobosea - about 40 µm

…Phylum Amoebozoa

Mayorella
Mayorella - about 75 µm
Tubulinea
Tubulinea - about 55 µm
Tubulinea
Tubulinea - about 90 µm

Kingdom Animalia
…Phylum Gnathifera – rotifers & allies

Ploima
Ploima - about 135 µm
Ploima
Ploima - about 125 µm
Ploima
Ploima - about 100 µm
Lecane
Lecane - body about 85 µm

Uncertain objects

Unknown
Clustered cells - main group about 40 µm
Unknown
Spiked object - body about 45 µm