This sample was taken from the shallow stream here, which at this point had occasional patches of filamentous green algae on some rocks. This looked tangled and relatively coarse to the unaided eye, a little like some hanging lichens, and turned out to be Cladophora.
Two rocks with algae were taken, along with two mayfly larvae. The fronds were home to many fly larvae, mainly midges but also black flies varying a great deal in size. Unfortunately these generally did not survive the single night, except the largest; likely the water needed to be aerated for them to be kept even this short amount of time.
The filaments had numerous small attached diatoms, but otherwise microscopic life was not particularly abundant. Pleurostomes were the most common among the algae, along with other ciliates and some rotifers. There were also several sorts of euglenids, small amoebae, and Closterium in sediment from the bottom.