Microlife: Glenmore Reservoir - Stonewort fragments

May 22-23, 2009
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The water here had receded about a metre over the past week, and in several places many hard brown pieces of stoneworts had collected among the rocks, giving them a stronger “aquatic” scent. Some of these were taken as well as a rock caked in hard mud. An amphipod, some midge larvae, and a pond snail were also found in the sample.

Diatoms occurred throughout, most notably stalked Cymbella on the mud. There were also some ciliates, including both blue-green and colourless heterotrichs, and a few short-toed rotifers and roundworms. One piece of stonewort had several epiphytes, mainly tree-shaped Chaetophora but also Chroodactylon.

Kingdom Plantae
…Phylum Rhodophyta – red algae

Chroodactylon
Chroodactylon - cells up to 15 µm

…Phylum Chlorophyta – green algae

Chaetophora
Chaetophora - filaments up to 8 µm wide

Kingdom Chromista
…Phylum Ciliophora – ciliates

Stentor
Stentor - about 115 µm
Spirotrich
Spirotrichea - about 105 µm
Lacrymaria
Lacrymaria - about 165 µm
Phyllopharyngea
Phyllopharyngea - about 60 µm
Cothurnia
Cothurnia - about 70 µm

…Phylum Ochrophyta – heterokont algae

Diatom
Diatomeae - about 150 µm
Diatom
Diatomeae - about 115 µm
Cymbella
Cymbella - cells about 60-70 µm
Diatom
Diatomeae - about 90 µm
Cymatopleura
Cymatopleura - about 125 µm

Kingdom Animalia
…Phylum Gnathifera – rotifers & allies

Ploima
Ploima - about 115 µm
Brachionid
Brachionidae - about 135 µm

…Phylum Mollusca

Pond snail
Lymnaeidae - about 7.6 mm

…Phylum Nematoda – roundworms

Roundworm
Nematoda - about 405 µm
Roundworm
Nematoda - about 900 µm

…Phylum Arthropoda – insects, crustaceans & allies

Copepod larva
Copepoda, larva - body about 160 µm
Amphipod
Amphipoda - about 3.7 mm
Chydorid
Chydoridae - about 395 µm
Midge larva
Chironomidae, larva - about 4.5 mm