Microlife: Duck pond - Vaucheria from ditch

Jul 26-28, 2014
Video: mating by Phaenocora
Previous sample

This was taken when the water in this duck pond was fairly high and it had flooded into a long ditch running parallel to the highway. Here there were some stands of cattails and floating mats of algae, found to be Vaucheria. It was also home to very many dragonflies, damselflies, and small boreal chorus frogs.

Ditch
Boreal chorus frog

The sample included some algae and plant fragments, on which there were many Hydra feeding on still more plentiful chydorids. What stood out most though were innumerable Volvox, easily visible to the eye until most disappeared on the third day. There were also various insect larvae, flatworms, and tadpole snails.

Smaller algae were likewise common, notably cyanobacteria, conjugating algae, and epiphytic diatoms. Ciliates were found throughout including Stylonychia and other spirotrichs, colepids, sessilids, and some larger dark types. Most rotifers were less abundant though Notommata and Asplanchnopus were reasonably widespread.

↬ Thanks to zoologist Dr. Alexander Kostenko for the identification of Gyratrix hermaphroditus, Phaenocora, and Mesostoma as well as confirmation of the other flatworms.

Kingdom Bacteria
…Phylum Cyanobacteria – blue-green algae

Nostocaceae Nostocaceae - about 6-7 µm wide

Kingdom Plantae
…Phylum Chlorophyta – green algae

Chlorophyte
Chlorophyta - about 11-14 µm wide
Chlorophyte
Chlorophyta - about 5 µm wide
Scenedesmaceae
Scenedesmaceae - about 13 µm
Hydrodictyaceae, diatom
Hydrodictyaceae, Diatomeae - about 40, 30 µm
Hydrodictyaceae
Hydrodictyaceae - colony about 45 µm
Hydrodictyaceae
Hydrodictyaceae - colony about 50 µm
Chlorophyte
Chlorophyceae - colony about 35 µm
Pandorina
Pandorina - colony about 40 µm
Volvox
Volvox - colony about 210 µm
Volvox
Volvox - colony about 340 µm
Volvox
Volvox - colony about 410 µm
Volvox
Volvox - colony about 535 µm
Volvox
Volvox - colonies about 370-390, 660 µm
Spirogyra
Spirogyra - about 150 µm wide
Spirogyra
Spirogyra - about 150 µm wide
Spirogyra
Spirogyra - about 160 µm wide
Spirogyra zygospores
Spirogyra, zygospores - about 135 µm
Closterium
Closterium - about 130 µm
Closterium
Closterium - about 285 µm
Cosmarium
Cosmarium - about 25 µm
Cosmarium
Cosmarium - about 35 µm
Cosmarium
Cosmarium - about 45 µm
Cosmarium, Scenedesmaceae
Cosmarium, Scenedesmaceae - about 55, 14 µm

…Phylum Tracheophyta – vascular plants

Spiral lignin from xylem Lignin from xylem - strand about 4 µm wide

Kingdom Chromista
…Phylum Ciliophora – ciliates

Strobilidium
Strobilidium - about 55 µm
Holosticha
Holosticha - about 65 µm
Halteria
Halteria - about 25 µm
Spirotrich
Spirotrichea - about 85 µm
Hypotrichidium
Hypotrichidium - about 95 µm
Spirotrich, colepid
Spirotrichea, Colepidae - about 55, 45 µm
Spirotrich
Spirotrichea - about 70 µm
Spirotrich
Spirotrichea - about 130 µm
Spirotrich
Spirotrichea - about 140 µm
Spirotrich
Spirotrichea - about 75 µm
Stylonychia
Stylonychia - body about 100 µm
Stylonychia
Stylonychia - body about 200 µm
Stylonychia
Stylonychia - body about 245 µm
Dileptid
Dileptida - about 355 µm
Litostome
Litostomatea - about 140 µm
Actinobolinid
Actinobolinidae - body about 65 µm
Ciliate
Ciliophora - about 80 µm
Ciliate
Ciliophora - about 120 µm
Ciliate
Ciliophora - about 255 µm
Ciliate
Ciliophora - about 160 µm
Colepid
Colepidae - about 45 µm
Ciliate
Ciliophora - about 160 µm
Frontonia
Frontonia - about 95 µm
Frontonia
Frontonia, dividing - about 110 µm
Paramecium
Paramecium - about 240 µm
Sessilid
Sessilida - about 65 µm
Epistylis
Epistylis - bodies up to 100 µm
Carchesium
Carchesium - bodies up to 85 µm
Vorticellids
Vorticellidae - body about 75 µm
Vorticellids
Vorticellidae - body about 75 µm

…Phylum Ochrophyta – heterokont algae

Synura
Synura - colony about 55 µm
Synura
Synura - colony about 85 µm
Actinophrys
Actinophrys - body about 40 µm
Vaucheria
Vaucheria - filaments about 70-95 µm wide
Vaucheria
Vaucheria - filament about 100 µm wide
Diatom, spirotrich
Diatomeae, Spirotrichea - about 80, 65 µm
Diatoms
Diatomeae - about 120 µm
Diatoms
Diatomeae - about 200 µm
Diatoms
Diatomeae - about 275 µm
Diatom
Diatomeae - about 85 µm
Diatom
Diatomeae - about 55 µm
Diatoms
Diatomeae - about 27, 140 µm
Diatoms
Diatomeae - about 20, 40 µm
Diatoms
Diatomeae - about 30, 90 µm
Gomphonema
Gomphonema - cells about 28-30 µm
Gomphonema
Gomphonema - cells about 28, 50 µm
Diatoms
Diatomeae - cells about 30, 80 µm

Kingdom Protozoa
…Phylum Euglenozoa

Phacus
Phacus - about 27 µm
Phacus
Phacus - about 75 µm
Euglenid
Euglenida - about 60 µm
Euglenid
Euglenida - about 50 µm
Euglenids
Euglenida - about 70, 105 µm
Trachelomonas
Trachelomonas - about 30 µm

…Phylum Amoebozoa

Amoebozoa
Amoebozoa - about 115 µm

Kingdom Animalia
…Phylum Cnidaria

Hydra
Hydra - body about 1.2 mm
Hydra with water fleas
Hydra with Cladocera - bodies about 2.2, 0.4 mm
Hydra
Hydra - body about 4.4 mm

…Phylum Gnathifera – rotifers & allies

Floscularia
Floscularia - case about 125 µm wide
Limnias
Limnias - about 325 µm
Collotheca
Collotheca - body about 210 µm
Gnesiotroch larva
Gnesiotrocha, larva - about 95 µm
Squatinella
Squatinella - about 170 µm
Lepadella
Lepadella - about 130 µm
Notommata
Notommata - about 145 µm
Ploima
Ploima - body about 70 µm
Ploima
Ploima - body about 90 µm
Trichocerca
Trichocerca - body about 130 µm
Euchlanis
Euchlanis - about 450 µm
Lecane
Lecane - about 220 µm
Platyias
Platyias - about 360 µm
Asplanchnopus
Asplanchnopus - about 830 µm

…Phylum Platyhelminthes – flatworms

Macrostomum
Macrostomum - about 450 µm
Dalyelliid
Dalyelliidae - about 265 µm
Dalyelliid
Dalyelliidae - about 580 µm
Gyratrix hermaphroditus
Gyratrix - about 940 µm
Phaenocora
Phaenocora - about 2.4 mm
Phaenocora
Phaenocora - pair about 1.6 mm
Typhloplanid
Typhloplanidae - about 780 µm
Mesostoma
Mesostoma - about 2.0 mm
Mesostoma, Volvox
Mesostoma, Volvox - about 2.4, 0.3-0.6 mm

…Phylum Mollusca

Pond snail
Lymnaeidae - shell about 1.8 mm wide
Tadpole snail
Physidae - shell about 1.3 mm
Tadpole snail
Physidae - shell about 1.8 mm
Snail eggs
Gastropoda, eggs - shells about 0.7-0.9 mm

…Phylum Arthropoda – insects, crustaceans & allies

Podocopid
Podocopida - about 705 µm
Cyclopoid with eggs
Cyclopoida - body about 970 µm
Copepod larva
Copepoda, larva - body about 120 µm
Captured Scapholeberis
Captured Scapholeberis - body about 380 µm
Simocephalus
Simocephalus - body about 2.0 mm
Captured chydorid
Captured Chydoridae - about 245 µm
Chydorid
Chydoridae - about 300 µm
Chydorid
Chydoridae - about 400 µm
Stonefly larva
Plecoptera, larva - body about 2.3 mm
Punkie larva
Ceratopogonidae, larva - about 3.1 mm
Midge larva
Chironomidae, larva - about 2.8 mm
Midge larva
Chironomidae, larva - about 4.6 mm
Haliplid larva
Haliplidae, larva - about 6.3 mm
Diving beetle larva
Dytiscidae, larva - about 4.5 mm

Uncertain objects

Unknown
Cells on Vorticellidae - about 6 µm
Unknown
Green cells on Hydra - about 12 µm
Unknown
Greenish flagellates - about 17-18 µm
Unknown
Dimpled case or fragment - about 80 µm
Unknown
Dead algae cell - about 230 µm