Microlife: Stormwater ponds - Water from marsh

May 10-13, 2014
Previous sample

This was from the same marsh visited before and again taken between the slope of dry grass and dead cattail stands. But some new shoots were emerging, and among the many water striders and beetles there were a few floating plants, namely some wrinkled strings of Ulva and smaller duckweed. These were included in the sample along with grass and debris from below.

Marsh
American coot

Besides the larger strings there were also filamentous clumps, mostly pale and fine, but also some that were coarse and multiseriate. The latter were presumably smaller Ulva since they had similar side branches, and diatoms were particularly common on them, though many also occurred throughout the sample.

Small crustaceans were also very common throughout, including cyclopoids, ostracods, and some Simocephalus. There were also abundances of blue Stentor, colepids, and Trachelomonas, along with other ciliates and euglenids. Rotifers too were well-represented, particularly by Notholca and soft-bodied types.

Kingdom Plantae
…Phylum Chlorophyta – green algae

Ulva
Ulva - about 310-340 µm wide
Ulva, duckweed
Ulva, Lemna - about 2.0-3.7 mm wide, 2.6 mm
Ulva cells
Ulva - cells about 15-20 µm
Ulva
Ulva - about 55 µm wide
Scenedesmaceae
Scenedesmaceae - about 17 µm
Chlorophyte
Chlorophyta - about 8 µm wide
Mougeotia
Mougeotia - about 28 µm wide

…Phylum Tracheophyta – vascular plants

Duckweed
Lemna - body about 3.5 mm
Star duckweed
Lemna trisulca - stalked leaf about 8 mm
Star duckweed cells
Lemna trisulca - cells about 40-70 µm

Kingdom Chromista
…Phylum Ciliophora – ciliates

Loxodes
Loxodes - about 165 µm
Loxodes
Loxodes - about 245 µm
Spirostomum
Spirostomum - about 475 µm
Spirostomum
Spirostomum - about 610 µm
Blepharisma
Blepharisma - about 115 µm
Stentor
Stentor - about 385 µm
Stentor
Stentor - about 770 µm
Stentor
Stentor - front about 135 µm wide
Ciliate
Ciliophora - about 130 µm
Ciliate
Ciliophora - about 85 µm
Ciliate
Ciliophora - about 90 µm
Ciliate
Ciliophora - about 30 µm
Aspidisca
Aspidisca - about 25 µm
Euplotes
Euplotes - about 80 µm
Strobilidium
Strobilidium - about 50 µm
Spirotrich
Spirotrichea - about 60 µm
Halteria
Halteria - about 30 µm
Spirotrich
Spirotrichea - about 75 µm
Spirotrich
Spirotrichea - about 85 µm
Colepid, Trachelomonas
Colepidae, Trachelomonas - about 45, 19 µm
Colepid
Colepidae - about 55 µm
Colepid
Colepidae - about 55 µm
Ciliate
Ciliophora - about 160 µm
Ciliate
Ciliophora - about 55 µm
Frontonia
Frontonia - about 250 µm
Paramecium
Paramecium - about 210 µm
Ciliate, diatom
Ciliophora, Diatomeae - about 35, 75 µm
Ciliate
Ciliophora - about 25 µm
Epistylis
Epistylis - about 25-27 µm wide
Sessilids
Sessilida - about 40-45 µm wide
Sessilids
Sessilida - about 60 µm wide
Sessilid
Sessilida - body about 23 µm
Vorticella
Vorticella - body about 40 µm
Vorticella
Vorticella - bodies about 110 µm
Vorticellid
Vorticellidae - body about 75 µm
Vorticellid
Vorticellidae - body about 100 µm

…Phylum Miozoa

Dinoflagellate
Peridinea - about 50 µm

…Phylum Ochrophyta – heterokont algae

Diatom
Diatomeae - about 21 µm
Diatom
Diatomeae - about 27 µm
Diatoms
Diatomeae - about 22, 40 µm
Diatoms
Diatomeae - about 22 µm wide
Diatoms
Diatomeae - about 35 µm wide
Fragilaria
Fragilaria - about 120 µm
Diatoms
Diatomeae - about 27, 85 µm
Diatoms
Diatomeae - about 95 µm
Diatoms
Diatomeae - about 22, 40, 125 µm
Diatom
Diatomeae - about 235 µm
Diatoms
Diatomeae - about 25, 265 µm
Diatoms
Diatomeae - about 10, 20-35, 50 µm
Diatom
Diatomeae - about 70 µm
Rhoicosphenia
Rhoicosphenia - about 25 µm
Rhoicosphenia
Rhoicosphenia - about 35 µm
Gomphonema
Gomphonema - cells about 35-40 µm
Gomphonema
Gomphonema - cells about 50 µm
Cymbella
Cymbella - about 50 µm
Diatom
Diatomeae - about 95 µm

Kingdom Protozoa
…Phylum Euglenozoa

Phacus, diatom
Phacus, Diatomeae - about 35, 50 µm
Euglenid, diatoms
Euglenida, Diatomeae - about 35, 30 µm
Euglenid
Euglenida - about 45 µm
Euglenid
Euglenida - about 50 µm
Colacium
Colacium - about 19 µm
Trachelomonas
Trachelomonas - about 18, 20 µm
Trachelomonas
Trachelomonas - about 24 µm

…Phylum Amoebozoa

Arcella
Arcella - about 65 µm
Arcella
Arcella - about 105 µm

Kingdom Animalia
…Phylum Gnathifera – rotifers & allies

Bdelloid
Bdelloida - about 165 µm
Bdelloid
Bdelloida - about 150 µm
Rotaria
Rotaria - about 550 µm
Lepadella
Lepadella - body about 105 µm
Ploima
Ploima - about 110 µm
Ploima
Ploima - body about 85 µm
Ploima
Ploima - body about 110 µm
Ploima
Ploima - body about 90 µm
Trichocerca
Trichocerca - body about 160 µm
Euchlanis
Euchlanis - body about 320 µm
Notholca
Notholca - about 260 µm
Keratella
Keratella - body about 160 µm
Keratella
Keratella with egg - body about 160 µm
Asplanchnopus
Asplanchnopus - about 540 µm
Synchaeta
Synchaeta - about 175 µm

…Phylum Gastrotricha

Chaetonotus
Chaetonotus - about 110 µm

…Phylum Bryozoa

Plumatella statoblast
Plumatella, statoblast - about 350 µm

…Phylum Mollusca

Pond snail
Lymnaeidae - shell about 2.4 mm

…Phylum Arthropoda – insects, crustaceans & allies

Mite
Acariformes - about 740 µm
Water mite
Acariformes - body about 1.3 mm
Podocopid
Podocopida - body about 335 µm
Podocopid
Podocopida - body about 400 µm
Podocopid
Podocopida - about 560 µm
Podocopid
Podocopida - body about 835 µm
Copepod
Copepoda - body about 300 µm
Harpacticoid
Harpacticoida - body about 760 µm
Cyclopoid
Cyclopoida - body about 395 µm
Cyclopoid
Cyclopoida - body about 630 µm
Cyclopoid
Cyclopoida - body about 1.1 mm
Copepod larva
Copepoda, larva - body about 130 µm
Copepod larva
Copepoda, larva - body about 295 µm
Amphipod
Amphipoda - about 6.5 mm
Water flea ephippium
Cladocera, ephippium - about 980 µm
Water flea ephippium
Cladocera, ephippium - about 1.0 mm
Simocephalus
Simocephalus - body about 460 µm
Simocephalus
Simocephalus - body about 2.4 mm
Midge larva
Chironomidae, larva - about 1.0 mm
Fly larva
Diptera, larva - about 3.2 mm
Water beetle
Coleoptera - about 3.0 mm

Uncertain objects

Unknown
Thin filament, green cells - about 5 µm wide, 5-6 µm
Unknown
Thin filament - about 7 µm wide
Unknown
Brown filament - about 12 µm wide
Unknown
Scavengers in Keratella shell - about 10-14 µm
Unknown
Small heliozoan-like - body about 25 µm
Unknown
Coiled spore - about 22 µm